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University of Zambia
1.
Serenje, Gerald Isaac.
Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
.
Degree: 2011, University of Zambia
URL: http://hdl.handle.net/123456789/792
► Sweetpotato is one of the most important sources of carbohydrates among small-scale farmers in Zambia and ranking second only to cassava. A study was conducted…
(more)
▼ Sweetpotato is one of the most important sources of carbohydrates among small-scale
farmers in Zambia and ranking second only to cassava. A study was conducted under
field conditions at three locations during the 2008/09 season to determine the variability of micronutrients and to characterise the agronomic parameters of orange-fleshed sweetpotato varieties grown under different environments. The experiments were laid out and evaluated in a RCBD with 3 replications. A total of 15 varieties, including 2 local varieties, were used.The results showed that there were significant differences in the locations for zinc with highest content obtained at Kamato with 44 mg/100g followed by Mansa with 27
mg/100g and lastly 12.8 mg/100g at Mutanda, while varieties were significantly
different (P=0.05) for iron. There was differential response of the varieties to the
locations with regards to iron. Naspot1 and Ukerewe had the highest iron concentration at
11.20 mg/100g and 8.06 mg/100g. It was also revealed that locations, varieties and
interactions were significantly different (P=0.05) for ß-carotene and vitamin A
concentrations of sweetpotato. The variety Zambezi, K5 632, 199062.1 and Mayai
produced high mean concentration of ß-carotene. These were 7.82 mg/100g, 7.89
mg/100g, 6.18 mg/100g and 6.52 mg/100g, respectively. The varieties with high total plant yield were Naspot1 and 199062.1 with 21.88 t/ha and 19.78 t/ha respectively, while the varieties with the total plant weight was Kakamega with 7.15 t/ha. Mutanda had the highest mean total plant weight of 16.7 t/ha, while Kamato and Mansa had 13.7 t/ha and 13.2 t/ha respectively. For marketable yield, locations and varieties were significantly different at P=0.05. The varieties with the highest marketable yield were Naspot1 and K118 at 13.7 t/ha and 9.57 t/ha,respectively. The variety with the lowest marketable y ld was Kakamega at 5.23 t/ha.
The mean marketable yield for locations ranged from 5.23 t/ha at Mansa to 9.69 t/ha at Mutanda. The results for non marketable yield showed that locations, varieties and
interactions were significantly different at P=0.05.The highest non marketable yield
varieties were Kalungwishi and 199062.1 with 7.26 t/ha and 5.50 t/ha respectively. There
was a differential response in non-marketable yield for varieties tested as evidenced by interactions. None of the high yielding varieties showed high levels of stability.Varieties were also significantly different for weevil score, vine weight and harvest index. The variety with the highest weevil score was Carrot.C at 2.62 while the variety with the lowest weevil score was Naspot1 at 1.31. The varieties with high vine weight were K118 and Gweri at 4.52 t/ha and 4.29 t/ha, respectively while Ejumula had the
lowest vine weight with 1.94 t/ha. The varieties with high harvest index were 199062.1,Carrot.C and Mayai at 85%, 83% and 83% respectively. Gweri, Kakamega and Pipi had the lowest HI with values of 67%, 68% and 70%, respect ly.From the current study it can be concluded that selection…
Subjects/Keywords: Sweetpotato – Nutrients;
Ipomoea batatas – Nutrients
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APA ·
Chicago ·
MLA ·
Vancouver ·
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Export
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APA (6th Edition):
Serenje, G. I. (2011). Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
. (Thesis). University of Zambia. Retrieved from http://hdl.handle.net/123456789/792
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Serenje, Gerald Isaac. “Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
.” 2011. Thesis, University of Zambia. Accessed January 23, 2021.
http://hdl.handle.net/123456789/792.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Serenje, Gerald Isaac. “Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
.” 2011. Web. 23 Jan 2021.
Vancouver:
Serenje GI. Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
. [Internet] [Thesis]. University of Zambia; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/123456789/792.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Serenje GI. Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments
. [Thesis]. University of Zambia; 2011. Available from: http://hdl.handle.net/123456789/792
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Raina, Bharati.
Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system.
Degree: Soil Sciences, 2002, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/9778
► A long-term field experiment was started during Kharif 1988 with four levels of lantana addition (0, 10, 20 and 30 t ha-1) on fresh weight…
(more)
▼ A long-term field experiment was started during
Kharif 1988 with four levels of lantana addition (0, 10, 20 and 30
t ha-1) on fresh weight basis and three fertilizer levels (33, 66
and 100 per cent of recommended N and K to rice and 66 per cent of
N, P and K to wheat). The application of P to rice was totally
omitted. Chopped lantana was added 10 to 15 days before
transplanting of rice every year. The experiment was conducted in
randomized block design with twelve treatments replicated three
times. The present study Carbon sequestration and nutrient dynamics
in a long-term lantana amended soil under rice-wheat system , was
undertaken from Kharif 2004 to Rabi 2005-06. The soils of the
experimental site were acidic and classified taxonomically as Typic
Hapuldalf . Soil samples from 0-0.15 and 0.15-0.30 m soil depths
were taken after the harvest of Rabi wheat 2004-05 and were
analyzed for different active, slow and passive pools of SOM,
active and passive pools of N, P and S besides this, different
physical, chemical and biological properties of the soils. Out of
the total organic matter added through lantana addition from 10 to
30 t ha-1 over the last 17 years, the average sequestration in the
soil was only about 19 per cent out of which about 60 per cent was
retained in passive pools and only 11 per cent in active pools.
Continuous lantana addition and fertilizer application has also
increased total C stock, C stock ha-1 yr-1 and retention of all
active and passive pools of C in the soil. With
increasing/improvement in all the pools of N, P and S as well as
physical, chemical and biological properties of soil with
increasing levels of lantana addition and fertilizer application,
the maximum rice and wheat yield as well as uptake of N, P and S
was obtained under 20 t ha-1 lantana addition alongwith 66 per cent
of N and K addition to rice indicating a saving of 33 per cent N
and K to rice and N, P, K to wheat grown in a sequence. Among
different SOM pools, WS-CHO and SMB-C and among N, P and S pools,
SMB-P, Available-N and WS-OC were found to be the most important
for rice and wheat production. The Roth-C-26.3 model could be used
to predict the soil carbon dynamics as it fitted well with the
observed data in the present experiment.
References p. clxxviii-ccvi
Advisors/Committee Members: Verma, T S.
Subjects/Keywords: Nutrients; Rice; Soil
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Raina, B. (2002). Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9778
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Raina, Bharati. “Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system.” 2002. Thesis, INFLIBNET. Accessed January 23, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/9778.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Raina, Bharati. “Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system.” 2002. Web. 23 Jan 2021.
Vancouver:
Raina B. Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system. [Internet] [Thesis]. INFLIBNET; 2002. [cited 2021 Jan 23].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9778.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Raina B. Carbon sequestration and nutrient dynamics in a long-term
lantana amended soil under rice wheat system. [Thesis]. INFLIBNET; 2002. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9778
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
3.
Holgate, Leon Carl.
Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.
Degree: MS, Soil Science, 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673
► Maintaining a supply of potable water is a growing concern in the USA, particularly in many southern and western states. One method of sustaining water…
(more)
▼ Maintaining a supply of potable water is a growing concern in the USA, particularly in many southern and western states. One method of sustaining water supply in these areas is the use of greywater for commercial and residential landscape irrigation. Greywater is derived from residential use such as showers, laundering and bathing, and accounts for approximately 65% of residential waste water. I investigated the effects of municipal tap water, harvested rain water, washing machine and bath water (greywater) on the carbon and nutrient dynamics of soil, foliage and leachate and on soil microbial diversity. I also examined the presence or absence of E. coli in source water and leachate. There was a significant difference in leachate chemistry among irrigation treatments. Average leachate pH and conductivity was significantly lower in treatments irrigated with harvested rain water. Fertilization did not affect any of the leachate chemistries with the exception of orthophosphate-P, but significantly reduced carbon in soil without grass (blank) and domestic tap water treatments. E. coli colonies were detected in source water (greywater), but not in leachate suggesting that there was no movement through the soil profile. The results of principal component analysis (PCA) on whole-soil fatty acid methyl ester (FAME) profiles indicated distinct differences in soil microbial community composition due to irrigation with greywater as compared to rainwater, suggesting that water source may affect soil microbial community composition.
Advisors/Committee Members: Aitkenhead-Peterson, Dr. Jacqueline (advisor), Gentry, Dr. Terry (advisor), White, Dr. Richard (committee member), McInnes, Dr. Kevin (committee member).
Subjects/Keywords: Greywater; Soil Nutrients
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Holgate, L. C. (2011). Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673
Chicago Manual of Style (16th Edition):
Holgate, Leon Carl. “Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.” 2011. Masters Thesis, Texas A&M University. Accessed January 23, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673.
MLA Handbook (7th Edition):
Holgate, Leon Carl. “Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.” 2011. Web. 23 Jan 2021.
Vancouver:
Holgate LC. Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673.
Council of Science Editors:
Holgate LC. Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673

Addis Ababa University
4.
Abrham, Belete.
Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
Degree: 2014, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/5447
► Nutrient depletion is one of the major causes that contribute to decline in soil productivity in the highlands of Ethiopia. In this study, four outflows:…
(more)
▼ Nutrient depletion is one of the major causes that contribute to decline in soil productivity in the highlands of Ethiopia. In this study, four outflows: Nutrient harvest, Crop residue, Leaching and Erosion and four inflows: Organic fertilizer, Manure, Deposition and Nitrogen fixation were taken into account. The nutrient balance conducted as a yearly basis using 2010/2011 cropping year as a reference. Estimations of inflows and outflows employed empirical and transfer functions; results of estimations linked to ArcGIS for visualization purpose (i.e. presented in map form). All macro nutrient balance for each zone of cereal lands of the region was negative. It was mainly due to very low inputs from mineral fertilizers and relatively low organic fertilizers. And also it associated with huge export of NPK through nutrient leaching and soil erosion from the system. The average nutrient depletion rate in the cereal lands of the region was -65Nitrogen, -27Phosphorous and -45Potassium kilogram/hector or (-137 NPK kg/ha). Finally this study estimated that averagely 78, 30 and 54 N, P and K kg/ha amount had required in the cereal lands of the region for cereal production without depleting the soil nutrient respectively in the year 2010/2011.
Advisors/Committee Members: Dr, Assefa Abegaze (advisor).
Subjects/Keywords: Macro-Nutrients;
Inflows
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Abrham, B. (2014). Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
(Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/5447
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Abrham, Belete. “Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
” 2014. Thesis, Addis Ababa University. Accessed January 23, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/5447.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abrham, Belete. “Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
” 2014. Web. 23 Jan 2021.
Vancouver:
Abrham B. Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
[Internet] [Thesis]. Addis Ababa University; 2014. [cited 2021 Jan 23].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/5447.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abrham B. Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia.
[Thesis]. Addis Ababa University; 2014. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5447
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University
5.
Huizenga, Alexander Paul.
Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado.
Degree: MS(M.S.), Civil and Environmental Engineering, 2015, Colorado State University
URL: http://hdl.handle.net/10217/166931
► The Lower Arkansas River Valley in southeastern Colorado is an irrigated, agricultural valley suffering from high concentrations of nutrients (Nitrogen N; phosphorus P) and salts…
(more)
▼ The Lower Arkansas River Valley in southeastern Colorado is an irrigated, agricultural valley suffering from high concentrations of
nutrients (Nitrogen N; phosphorus P) and salts in the coupled groundwater-surface water system. The majority of data collection efforts and associated spatial analysis of concentrations and mass loadings from the aquifer to the stream network have been performed at the regional scale (> 500 km²). These regional scale assessments have indicated that river riparian areas play a major role in controlling nutrient mass flux to the Arkansas River and its tributaries. However, the water and nutrient mass exchange within the riparian-stream system have not yet been investigated in detail. The objective of this thesis is to enhance understanding of hydro-chemical stream-aquifer processes at the reach scale (< 5 km) along the main stem of the Arkansas River and along a major tributary. Using a suite of in-stream instruments and observation wells, a 4.7 km reach of the Arkansas River and a 2 km reach of Timpas Creek were monitored to quantify spatio-temporal groundwater-surface water interaction and mass inputs and outputs of
nutrients. The total volume of water flowing into and out of each study reach was quantified using existing stream gages for upstream flow measurements and developing new stream gages for downstream flow measurements. Stage-discharge relationships were developed at the downstream locations using in-stream water level loggers and periodic flow measurements using Acoustic Doppler Velocimeters (ADVs). Monitoring included growing season length and 24-hour monitoring of flow and water quality. Using these monitoring data, mass balance calculations were used to quantify groundwater-surface water interactions and nutrient mass exchanges and loadings. For growing season length analysis, surface water samples were collected and in-situ measurements were made at the stream gaging sites every two weeks during the study period to provide a data set on fluxes into and out of each reach during the irrigation season. The two 24-hour sampling events were performed in June and October of 2014 to compare groundwater-surface water exchange and mass loadings at the beginning and end of the growing season. Composite water quality samples for total N, nitrate as nitrogen (NO₃‾; as N), nitrite as nitrogen (NO₂‾; as N), ammonium as nitrogen (NH₄⁺ as N), total P, and dissolved salts were collected at the gage locations every 2 hours using ISCO automatic samplers along with in-situ measurements of water level, temperature, and specific conductance. Water quality samples, along with in-situ measurements, were also collected from transects of shallow monitoring wells installed in the riparian corridor and on the banks of each reach during sampling events. These water quality data, as well as estimated gradients of groundwater hydraulic head between monitoring wells, were used to inform mass loading calculations. Growing season length monitoring results from the Arkansas River show…
Advisors/Committee Members: Bailey, Ryan (advisor), Gates, Timothy (advisor), Covino, Timothy (committee member).
Subjects/Keywords: nutrients; mass balance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huizenga, A. P. (2015). Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/166931
Chicago Manual of Style (16th Edition):
Huizenga, Alexander Paul. “Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado.” 2015. Masters Thesis, Colorado State University. Accessed January 23, 2021.
http://hdl.handle.net/10217/166931.
MLA Handbook (7th Edition):
Huizenga, Alexander Paul. “Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado.” 2015. Web. 23 Jan 2021.
Vancouver:
Huizenga AP. Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado. [Internet] [Masters thesis]. Colorado State University; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10217/166931.
Council of Science Editors:
Huizenga AP. Monitoring groundwater-surface water interaction and nutrient mass exchange in the riparian corridor of the Lower Arkansas River Valley, Colorado. [Masters Thesis]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/166931

University of Zambia
6.
Shanungu, Griffin Kaize.
Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
.
Degree: 2014, University of Zambia
URL: http://hdl.handle.net/123456789/3214
► This study aimed at assessing impacts of Dichrostachys cinerea and Mimosa pigra encroachment on soil nitrogen, phosphorous and carbon pools as well as plant species…
(more)
▼ This study aimed at assessing impacts of Dichrostachys cinerea and Mimosa pigra
encroachment on soil nitrogen, phosphorous and carbon pools as well as plant species
diversity, vegetation composition and food supply for herbivores in Lochinvar National
park of Southern Zambia. The study hypothesized that shrub encroachment a) increases soil nitrogen and carbon pools but leads to a reduction in soil phosphorous pools, b)reduces plant species diversity and changes the composition of the understory
vegetation and c) reduces biomass production of the understory vegetation, and that
this would lead to a reduction in food supply for large herbivores, particularly the Kafue Lechwe. In order to assess the impacts, 20 and 19 field plots were selected along gradients of increasing cover of D. cinerea and M. Pigra shrubs respectively in
Lochinvar National Park. In each of the plots, soil samples were collected and measured for soil pH, bulk density and soil nitrogen, phosphorous and carbon pools. Nitrogen mineralization rate as well as nitrogen and phosphorous availabilities were also investigated. Plant species composition and biomass production were measured for
each of the plots in the D. cinerea and M. pigra plots. The results of this study showed
that encroachment of D. cinerea shrubs not only increased the soil pools of nitrogen
and carbon linearly, but also that of phosphorous, whereas no such associations were observed in the M. pigra gradient. Furthermore, the encroachment of D. cinerea and M. pigra had significant impact on plant species diversity and richness and altered the understory vegetation composition. Both these encroaching species largely reduced
cover of grasses and grass biomass production. This suggests that shrub encroachment had reduced food supply for grass-eating herbivores, particularly the endemic Kafue Lechwe, in Lochinvar National Park. These results as well as an analysis of shrub encroachment based on satellite images show that shrub encroachment had likely not reached its end yet, and hence might even further reduce the food for these herbivores in the future.
Subjects/Keywords: Soil Science;
Soil Nutrients
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shanungu, G. K. (2014). Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
. (Thesis). University of Zambia. Retrieved from http://hdl.handle.net/123456789/3214
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Shanungu, Griffin Kaize. “Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
.” 2014. Thesis, University of Zambia. Accessed January 23, 2021.
http://hdl.handle.net/123456789/3214.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Shanungu, Griffin Kaize. “Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
.” 2014. Web. 23 Jan 2021.
Vancouver:
Shanungu GK. Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
. [Internet] [Thesis]. University of Zambia; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/123456789/3214.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Shanungu GK. Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia
. [Thesis]. University of Zambia; 2014. Available from: http://hdl.handle.net/123456789/3214
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
7.
Miwa, Adriana Cristina Poli.
Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano.
Degree: PhD, Hidráulica e Saneamento, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/
;
► Esta pesquisa foi desenvolvida na Estação de Tratamento de Esgoto de Cajati, onde o tratamento é realizado por lagoas de estabilização com sistema australiano. Em…
(more)
▼ Esta pesquisa foi desenvolvida na Estação de Tratamento de Esgoto de Cajati, onde o tratamento é realizado por lagoas de estabilização com sistema australiano. Em amostragens de variação nictemeral e sazonal, observou-se estratificação térmica nas duas lagoas, sendo que esta foi mais acentuada em abril. Em todos os períodos, a coluna de água esteve homogênea às 2h e 8h e estratificada às 14h e 20h. A estratificação térmica resultou na estratificação química (pH e oxigênio dissolvido), sendo que ambas as lagoas foram divididas em dois compartimentos: superior, com maiores temperaturas, pH e oxigênio dissolvido, e outro inferior, com comportamento contrário. A lagoa anaeróbia apresentou concentrações de oxigênio dissolvido de aproximadamente 10,0 mg/L, o que resulta em funcionamento inadequado também foi confirmado pelos resultados de clorofila nesta lagoa, que foram semelhantes aos da facultativa e atingiram até 3,5x\'10 POT.3\́'mü\'g/L em abril e julho. Além disso, as concentrações de nutrientes e coliformes foram baixas no afluente bruto em relação às obtidas na literatura. Os valores de pH estiveram altos para lagoas de estabilização, com máxima de 12,17 em janeiro. Apenas em abril, o pH esteve menor (6,84-9,86), condizente com a literatura e adequado para fermentação anaeróbia. O menor pH e maiores temperaturas obtidos em abril resultaram em melhores eficiências de redução que nos outros períodos. As estimativas de vazão e carga orgânica revelaram que a ETE vem operando abaixo da carga prevista, o que pode influenciar na eficiência do sistema, pois este não terá tempo suficiente para formar comunidade microbiana estável. Não foi possível observar variabilidade vertical padrão das biomoléculas proteínas, carboidratos e lipídeos, nem ao longo do sistema. Observou-se heterogeneidade espacial e vertical entre as concentrações de nitrogênio e fósforo em todo sistema, onde alguns processos puderam ser identificados e estes foram influenciados por temperatura, pH e oxigênio dissolvido. Houve predomínio de cianobactéria (Synechocystis sp) na ETE Cajati, seguido de clorofícea (Chlorella kessleri). Em ambas as lagoas, o predomínio foi de Eubactéria com baixas concentrações de Arquéias. O efluente final esteve de acordo com os padrões de lançamento de efluentes estabelecidos na Resolução CONAMA 357/2005.
This research was developed in the Cajati wastewater treatment plant, where the treatment is carried through by stabilization ponds with australian system. In samplings of nictemeral and seasonal variation, thermal stratification in the two ponds was observed, and this was more accented in April. In all the periods, the water column was homogeneous at 2 a.m. and 8 a.m. and stratified at 2 p.m. and 8 p.m. Thermal stratification resulted in chemical stratification (pH and dissolved oxygen) and both the ponds had been divided into two compartments: superior, with higher temperatures, pH and dissolved oxygen, and another inferior, to the contrary behavior. The anaerobic pond presented concentrations of dissolved oxygen of…
Advisors/Committee Members: Calijuri, Maria do Carmo.
Subjects/Keywords: Biomolecules; Nutrients; Ponds; Stabilization; Stratification
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APA ·
Chicago ·
MLA ·
Vancouver ·
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APA (6th Edition):
Miwa, A. C. P. (2007). Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/ ;
Chicago Manual of Style (16th Edition):
Miwa, Adriana Cristina Poli. “Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano.” 2007. Doctoral Dissertation, University of São Paulo. Accessed January 23, 2021.
http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/ ;.
MLA Handbook (7th Edition):
Miwa, Adriana Cristina Poli. “Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano.” 2007. Web. 23 Jan 2021.
Vancouver:
Miwa ACP. Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano. [Internet] [Doctoral dissertation]. University of São Paulo; 2007. [cited 2021 Jan 23].
Available from: http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/ ;.
Council of Science Editors:
Miwa ACP. Avaliação do funcionamento do sistema de tratamento de esgoto de Cajati, Vale do Ribeira de Iguape (SP), em diferentes épocas do ano. [Doctoral Dissertation]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/ ;

Cornell University
8.
Royem, Anna.
Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils.
Degree: M.S., Natural Resources, Natural Resources, 2012, Cornell University
URL: http://hdl.handle.net/1813/29184
► The major objective of this study is to address water quality problems associated with application of liquid manure to subsurface-drained agricultural lands. There are over…
(more)
▼ The major objective of this study is to address water quality problems associated with application of liquid manure to subsurface-drained agricultural lands. There are over 600 large and medium sized confined animal feeding operations (CAFOs) in New York, most of which utilize land application to manage this waste stream. Due to the regions shallow soil and humid weather, most fields have been equipped with tile drainage. The concern is that handling the manure in a liquefied state may enhance the likelihood of contamination of the tile drainage discharge and its potential impacts on downstream water quality. Laboratory studies were used to investigate how manure liquidity (percent solids) affects the transport of manure constituents through the soil. Soil columns were constructed, subjected to simulated rainfall. Effluent samples were analyzed for soluble reactive phosphorus (SRP). As expected, results show enhanced SRP transport through macropores with decreasing percent solids (i.e., more liquidy manure).
Advisors/Committee Members: Walter, Michael Todd (chair), Schneider, Rebecca L. (committee member).
Subjects/Keywords: Macropores; phosphorus; Agricultural Nutrients
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APA ·
Chicago ·
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APA (6th Edition):
Royem, A. (2012). Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/29184
Chicago Manual of Style (16th Edition):
Royem, Anna. “Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils.” 2012. Masters Thesis, Cornell University. Accessed January 23, 2021.
http://hdl.handle.net/1813/29184.
MLA Handbook (7th Edition):
Royem, Anna. “Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils.” 2012. Web. 23 Jan 2021.
Vancouver:
Royem A. Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils. [Internet] [Masters thesis]. Cornell University; 2012. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1813/29184.
Council of Science Editors:
Royem A. Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils. [Masters Thesis]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/29184
9.
Anil Kumar.
Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence.
Degree: Soil Sciences, 2008, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/9677
► The present study was carried out during 2009-11 with the aim of economizing phosphorus and rain-harvested water through vesicular arbuscular mycorrhizal (VAM) fungi in okra-pea…
(more)
▼ The present study was carried out during 2009-11
with the aim of economizing phosphorus and rain-harvested water
through vesicular arbuscular mycorrhizal (VAM) fungi in okra-pea
sequence. Use of VAM is highly desirable today from the perspective
of meeting nutrient needs of crops efficiently and economically,
rationalizing water use and maintaining soil health. Above work
consisted of 14 treatments viz. 2 VAM levels (0 and 12 kg ha-1), 3
phosphorus levels (50, 75 and 100% of soil test based recommended
dose) and 2 irrigation regimes (40 and 80% of available soil water
holding capacity) and 2 controls (farmers nutrient practice and
generalized recommended dose (NPK). Above treatments were laid out
in a completely randomized block design (RBD) with 3 replications.
The data on yield attributes, yields, nutrient uptake, net returns
and B:C ratios in okra-pea sequence indicated that treatment VAM +
75 per cent soil test based recommended P dose at either of 2
irrigation regimes did not differ significantly than generalized
recommended dose and VAM + 100 per cent soil test based recommended
P dose . It suggests an economy of about 25 per cent in soil test
based P dose through seed inoculation with mycorrhizal culture
(VAM). The use of mycorrhizal biofertilizer (VAM) enhanced water
use efficiency of okra and pea crop by about 5-17 and 12-35 per
cent, respectively. Integrated application of VAM, P and irrigation
did not alter available soil nutrient status significantly,
however, available P status was enhanced by 15-20 per cent after
harvest of each of the two crops i.e. okra and pea. Further, after
completion of two years of okra-pea sequential cropping, integrated
application of VAM, P and irrigation enhanced water holding
capacity and mean weight diameter of soil particles by 5-6 and 4-9
per cent, respectively. Above practice evaluated in okra-pea
sequence for two years, led to higher status of water soluble-P
(10-32%), NaHCO3-Pi (8-13%), NaOH-Pi (5-13%) and low status of
organic-P (NaHCO3-Po and NaOH-Po), each one of which contributed
appreciably to available P supply to plants. Results of the current
study suggest that the practice of VAM inoculation can go a long
way in reducing the cost of production directly as well as
otherwise. Moreover, its continuous use is going to enhance crop
quality and overall soil fertility, which is the need of the
hour.
References p. 225-244, Appendix p.
245-254
Advisors/Committee Members: Suri, V K.
Subjects/Keywords: Agriculture; Nutrients; Okra Pea
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kumar, A. (2008). Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9677
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kumar, Anil. “Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence.” 2008. Thesis, INFLIBNET. Accessed January 23, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/9677.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kumar, Anil. “Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence.” 2008. Web. 23 Jan 2021.
Vancouver:
Kumar A. Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence. [Internet] [Thesis]. INFLIBNET; 2008. [cited 2021 Jan 23].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9677.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kumar A. Phosphorus and rain harvested water economy through
vesicular arbuscular mycorrhizae (VAM) in Okra-Pea
sequence. [Thesis]. INFLIBNET; 2008. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9677
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Sepehya, Swapana.
Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system.
Degree: Soil Science, 2007, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/9769
► The present investigation was carried out to study the effect of integrated nutrient supply on transformation of N, P and K into various chemical pools…
(more)
▼ The present investigation was carried out to study
the effect of integrated nutrient supply on transformation of N, P
and K into various chemical pools in the on going long-term
fertilizer experiment initiated during 1991 at Bhadiarkhar farm of
College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh
Krishi Vishvavidyalaya, Palampur in randomized block design with
twelve treatments replicated four times. The soil of the
experimental site was silty loam and classified taxonomically as
Typic Hapludalf with acidic reaction, medium in organic carbon,
high in available N, medium in P and K at the initiation of the
experiment. Surface (0-0.15 m) and sub surface (0.15-0.30 m) soil
samples taken after the harvesting of wheat (2008-2009) were
analyzed for different forms of nitrogen, phosphorus and potassium.
Besides, pH, organic carbon, CEC and available N, P and K were also
determined in surface soil samples taken after rice (2008 and 2009)
and wheat (2008-09 and 2009-10) using standard methods of analysis.
Higher yields and uptake of N, P and K by rice (2008 and 2009) and
wheat (2008-09 and 2009-10) were recorded under INM treatments.
Continuous application of chemical fertilizers alone or along with
organics influenced the different fraction of N, P and K except non
hydrolysable-N and non exchangeable-K at both the depths and
improved the physical, chemical and microbiological condition of
the soil. Integrated nutrient supply proved superior to inorganics.
Among nitrogen fractions, hydrolysable ammonical-N was found to be
the most dominant, which exhibited highest correlation with soil
properties, yield and uptake followed by amino acid-N. Among P
fractions, NaHCO3-Pi for soil properties and NaOH-Pi for yield and
uptake were important. In case of K, water soluble-K and
exchangeable-K were dominant fractions. Continuous cropping without
fertilization resulted in depletion in all these
fractions.
References p. 168-202, Appendix p.
203-204
Advisors/Committee Members: Subehia, S K.
Subjects/Keywords: Fertilizers; Nutrients; Rice; Soil Science
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sepehya, S. (2007). Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9769
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sepehya, Swapana. “Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system.” 2007. Thesis, INFLIBNET. Accessed January 23, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/9769.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sepehya, Swapana. “Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system.” 2007. Web. 23 Jan 2021.
Vancouver:
Sepehya S. Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system. [Internet] [Thesis]. INFLIBNET; 2007. [cited 2021 Jan 23].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9769.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sepehya S. Long-term effect of integrated nutrient management on
dynamics of nitrogen, phosphorus and potassium in rice-wheat
system. [Thesis]. INFLIBNET; 2007. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9769
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
11.
Cira, Emily.
Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.
Degree: MS, Marine Biology, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151400
► Estuarine phytoplankton growth is often controlled by nitrogen availability. In addition to overall nitrogen loads, nitrogen form (organic vs. inorganic) is an important factor affecting…
(more)
▼ Estuarine phytoplankton growth is often controlled by nitrogen availability. In addition to overall nitrogen loads, nitrogen form (organic vs. inorganic) is an important factor affecting estuarine phytoplankton growth and community composition. Recent studies have shown that in addition to nitrogen availability, trophic cascades and relaxation of grazing pressure may also be important for phytoplankton bloom formation in estuaries.
With a goal of better understanding how nitrogen availability and grazing pressure interact to control estuarine phytoplankton growth and community composition, we examined the individualistic as well as the combined effects of nitrogen (varying availability and form) and grazing pressure on estuarine phytoplankton growth and community composition in the Neuse River Estuary, North Carolina, USA. During each of three sampling events (June 2011, August 2011, March 2012) natural phytoplankton assemblages were manipulated with added nitrogen (as urea or nitrate) and reduced grazing pressure (by filtering out zooplankton grazers). Treatments were incubated for 48 hours in an experimental pond, and subsamples taken daily to assess phytoplankton growth responses to treatments through chlorophyll a, diagnostic photopigments and cell enumerations.
The effects of nitrogen additions and reduced grazing pressure varied throughout the events. In June, only nitrogen addition stimulated phytoplankton community growth (chlorophyll a), while in August, only grazing reduction had a significant impact on community growth. Neither treatment had a significant effect on community growth in March, as the phytoplankton community faced phosphorus-limitation and decreased grazing pressure associated with cooler winter/spring temperatures. While both treatments did not continuously effect overall phytoplankton growth throughout all experiments, there were always effects seen in some diagnostic photopigments, indicating varying taxa-specific responses to treatments throughout the year, which can be explained by shifts in phytoplankton community composition and environmental factors.
These results demonstrate the importance of both bottom-up (nutrient availability and form) and top-down (grazing) controls in a temperate, eutrophic estuary. Results also hint at the potential for other factors (i.e. light and phosphorus-limitation) to play a role in phytoplankton growth as well. Phytoplankton growth, biomass and community dynamics are relevant indicators of environmental change and this study highlights the need to consider the potential interactive effects of controlling factors for proper management of estuarine ecosystems.
Advisors/Committee Members: Wetz, Michael (advisor), Cammarata, Kirk (committee member), Pollack, Jennifer (committee member).
Subjects/Keywords: estuarine phytoplankton; zooplankton grazing; nutrients
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cira, E. (2013). Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151400
Chicago Manual of Style (16th Edition):
Cira, Emily. “Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.” 2013. Masters Thesis, Texas A&M University. Accessed January 23, 2021.
http://hdl.handle.net/1969.1/151400.
MLA Handbook (7th Edition):
Cira, Emily. “Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.” 2013. Web. 23 Jan 2021.
Vancouver:
Cira E. Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1969.1/151400.
Council of Science Editors:
Cira E. Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151400

Texas A&M University
12.
Watson, Eliza.
Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.
Degree: MS, Water Management and Hydrological Science, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687
► Over the last few decades increasing attention has been paid to the effects of land use activities and land management on stream water quality. Recent…
(more)
▼ Over the last few decades increasing attention has been paid to the effects of land use activities and land management on stream water quality. Recent research has largely focused on dominant land uses such as urban development and agricultural cropland. The relative effect of land use activities and management on stream chemistry in sub-tropical rangeland ecosystems, where much of the land use is converted to pasture and agriculture is largely unknown. This study examined stream water quality and land use in a sub-tropical watershed in Northeast Texas largely dominated by rangeland. The study site, White Oak Creek Watershed located in the Sulphur River Basin, has been identified as an impaired stream due to low dissolved oxygen concentrations and subsequently listed on the Texas Commission for Environmental Quality's 303d list (TCEQ). In an attempt to determine potential sources of the low dissolved oxygen concentrations, twenty different chemical constituents were analyzed at 18 different sample sites in the tributaries of White Oak Creek and also along the main stem from April 2010 to March 2011. Dissolved oxygen concentrations over the study period were consistently above the minimum standard required by TCEQ and showed no indication of impairment. Correlation analysis did not show any clear correlation between dissolved oxygen and any specific land use, or any chemical constituent. Some
nutrients and suspended sediment concentrations were significantly different among the sub-catchments of White Oak Creek. Urban land uses were significantly and positively correlated to electrical conductivity, ammonium-N, magnesium, calcium, and dissolved organic carbon. Agricultural land use was significantly and positively correlated to orthophosphate-P, dissolved organic nitrogen, total suspended solids, and turbidity. Forests were inversely and significantly related to nitrate-N, orthophosphate-P, sulfate, dissolved organic carbon, total suspended solids, and turbidity. The study suggested that by maintaining a relatively high proportion of forested land in a watershed that water quality can be improved.
Advisors/Committee Members: Aitkenhead-Peterson, Jacqueline A. (advisor), Wilcox, Bradford (committee member), Munster, Clyde (committee member).
Subjects/Keywords: surface water; nutrients; water quality
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Watson, E. (2012). Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687
Chicago Manual of Style (16th Edition):
Watson, Eliza. “Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.” 2012. Masters Thesis, Texas A&M University. Accessed January 23, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687.
MLA Handbook (7th Edition):
Watson, Eliza. “Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.” 2012. Web. 23 Jan 2021.
Vancouver:
Watson E. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687.
Council of Science Editors:
Watson E. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687

Texas A&M University
13.
Graniero, Lauren E.
Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.
Degree: MS, Geology, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/154174
► Molluscan shell O- and C-isotope values have been shown to be useful indicators of upwelling and freshwater input (and thus nutrient status) in nearshore marine…
(more)
▼ Molluscan shell O- and C-isotope values have been shown to be useful indicators of upwelling and freshwater input (and thus nutrient status) in nearshore marine environments, but few studies have had the accompanying long term measurements of water δ
18O (δw) and dissolved inorganic carbon (DIC) δ
13C needed to best test the fidelity of shell isotope values as environmental indicators. Previously measured seawater δw and δ
13CDIC values collected biweekly from 2011-2012 allow us to determine if shell δ
18O and δ
13C values record temperature, δw, δ
13CDIC, and ultimately nutrient status in tropical waters. Conus, Vasum, and Strombus shell δ
18O values reflect predicted seasonal upwelling and freshening signals in the Pacific and seasonal freshening with minimal upwelling in the Caribbean. Both Pacific and Caribbean shell δ
13C profiles show cyclicity, but only Conus samples from Veracruz Beach (Pacific) record seasonal changes in δ13CDIC. This observation likely results from: (1) more distinct seasonal δ
13CDIC variation in Pacific waters compared with Caribbean waters and (2) greater availability of metabolic CO2 for shell growth in Strombus, which we hypothesize is related to greater activity associated with an herbivorous feeding habit.
To examine N-isotope ratios (
15N/
14N) in tissues and shell organic matrix of bivalves as a proxy for natural and anthropogenic nutrient fluxes in coastal environments, Pinctada imbricata, Isognomon alatus, and Brachidontes exustus bivalves were live-collected and analyzed from eight sites in Bocas del Toro, Panama. Sites include a variety of coastal environments, including more urbanized, uninhabited, riverine, and oceanic sites. At all sites there is no single dominant source of organic matter contributing to bivalve δ
15N and δ
13C values. Bivalve δ
15N and δ
13C values likely represent a mixture of mangrove and seagrass N and C, although terrestrial sources cannot be ruled out. Despite hydrographic differences between end-members, we see minimal δ
15N and δ
13C difference between bivalves from the river-influenced Rio Guarumo site and those from the oceanic Escudo de Veraguas site, with no evidence for N from open-ocean phytoplankton in the latter. Lastly, δ
15N values of tissue and shell organic matrix correlate significantly for pterioideans P. imbricata and I. alatus. Thus for these species, N isotope studies of historical and fossil shells may provide records of ecology of past environments.
Advisors/Committee Members: Grossman, Ethan L (advisor), Thomas, Debbie (committee member), Roark, Brendan (committee member).
Subjects/Keywords: isotopes; mollusks; upwelling; nutrients; nitrogen
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Graniero, L. E. (2014). Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/154174
Chicago Manual of Style (16th Edition):
Graniero, Lauren E. “Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.” 2014. Masters Thesis, Texas A&M University. Accessed January 23, 2021.
http://hdl.handle.net/1969.1/154174.
MLA Handbook (7th Edition):
Graniero, Lauren E. “Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.” 2014. Web. 23 Jan 2021.
Vancouver:
Graniero LE. Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1969.1/154174.
Council of Science Editors:
Graniero LE. Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/154174

University of Waterloo
14.
Werenka, Alexander.
Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement.
Degree: 2019, University of Waterloo
URL: http://hdl.handle.net/10012/15109
► Intensification of farming operations and increased nutrient application rates have led to higher crop yields and greater food security. At the same time, widespread use…
(more)
▼ Intensification of farming operations and increased nutrient application rates have led to higher
crop yields and greater food security. At the same time, widespread use of commercial
nitrogen (N) and phosphorus (P) fertilizers and large-scale livestock production have led to
unintended environmental consequences, including eutrophication of both coastal and inland
waters, threats to drinking water, and increased production of N2O, a potent greenhouse gas.
In the past, crop and livestock production were typically more integrated, allowing most
livestock to be fed by local crops, and most livestock manure to be applied directly to nearby
cropland. Under current intensive agriculture practices, however, there is frequently a spatial
decoupling of crops and livestock, leading to hot spots of manure production and a lack of
opportunities for cost-efficient and environmentally sensitive disposal. In recent years, there
has also been increased interest in the use of both farm and regional-scale bioreactors to convert
excess manure to energy, thus exploiting a renewable energy source and increasing the
potential to recycle animal waste.
In the present work, I develop a spatially distributed optimization approach to identify hotspots
of manure production, and, using both economic and environmental criteria, evaluate the
economic feasibility of (1) transporting manure for spreading on cropland to meet established
nutrient requirements, and (2) constructing biogas reactors to process excess manure in areas
where long-range transport is found to be infeasible. This work is focused on manure
redistribution, and potential for biogas construction at the continental US scale.
In order to identify the spatial disconnect between livestock and crop production, I developed
a gridded data set where each cell was 6 km x 6 km and calculated the crop requirements and
manure production in each cell. After finding the P requirements in each cell, I found that
530,000 tonnes of phosphorus in manure was located in areas where, if applied, it would be in
excess of the local crop requirements.
I then examined the feasibility of transporting manure from excess locations (cells) to other
locations to use as fertilizer by formulating an optimization problem to maximize the financial
benefits of transporting the manure. Savings from transporting manure was calculated as the
financial benefit from buying less mineral fertilizer minus the cost of transporting the manure.
The solution to this optimization problem shows that transporting manure was able to reduce
the excess phosphorus applied to fields by at least 88% with savings of up to $3 billion USD.
Finally, I examined the costs and benefits of using the remaining excess manure (after
transportation for fertilizer) as fuel to operate biogas plants. For this, I formulated an
optimization model to site biogas plants across the continental US such that net profits from
the biogas plants were maximized. Biogas net profits were defined as the money made from
…
Subjects/Keywords: livestock; nutrients; phosphorus; manure; optimization
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Werenka, A. (2019). Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15109
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Werenka, Alexander. “Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement.” 2019. Thesis, University of Waterloo. Accessed January 23, 2021.
http://hdl.handle.net/10012/15109.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Werenka, Alexander. “Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement.” 2019. Web. 23 Jan 2021.
Vancouver:
Werenka A. Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10012/15109.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Werenka A. Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/15109
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington
15.
Morelissen, Bionda.
Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand.
Degree: 2012, Victoria University of Wellington
URL: http://hdl.handle.net/10063/2022
► The introduction of non-native species and the alteration of seawater nutrient regimes due to anthropogenic impacts are two important threats to marine environments. Moreover, these…
(more)
▼ The introduction of non-native species and the alteration of seawater nutrient regimes due
to anthropogenic impacts are two important threats to marine environments. Moreover,
these disturbances may interact in such a way that promotes the success of invasive
species in coastal habitats. This thesis contributes to current gaps in knowledge in these
areas for low-intertidal communities.
Algal community dynamics and ecological effects of the invasive kelp Undaria
pinnatifida on low shores in the Wellington region, New Zealand, were examined, using
field surveys and experiments. In addition, the role of variability in nutrient
concentrations in coastal waters in mediating algal community structure and diversity,
and the success of U. pinnatifida reproduction were investigated.
Algal surveys were used in two locations thought to differ in nutrient regimes, the
Wellington Harbour and the Wellington south coast, to explore the structure and
dynamics of algal assemblages. Results showed high variability of low-intertidal algal
communities among sites, but no consistent differences in algal community composition
were found between the two locations, despite higher U. pinnatifida cover in the harbour.
Over the duration of the study, nutrient regimes did not differ greatly between the
locations.
The response of rocky intertidal algal assemblages to chronic exposure to high nutrient
effluent was investigated using two nearshore sewage outfalls in the Wellington region.
The Titahi Bay outfall showed a stronger relationship between
nutrients and algal
community composition. Variation in algal assemblage structure and diversity was best
explained by phosphate concentrations. By contrast, at the more wave-exposed
Pencarrow outfall, patterns of change in the algal community were less clear and there
was a much weaker relationship with seawater
nutrients.
Because removal of native algal canopy species may facilitate the establishment of
invasive macroalgae, the invasion process of U. pinnatifida in disturbed patches in a
rocky low-intertidal habitat was investigated. In a site where U. pinnatifida had not yet
established, patches were scraped clear of native algal cover at two different times of
year, and recruitment of U. pinnatifida was monitored. While U. pinnatifida invaded the
site, it recruited in control plots at a similar rate as cleared plots, suggesting that physical
disturbance of the native algal assemblage is not a key requirement for this kelp to invade
and establish in new areas in the low intertidal zone.
The response of native algal assemblages to removal of U. pinnatifida individuals was
investigated at intertidal sites in the Wellington Harbour and on the south coast. No
significant effect of U. pinnatifida on community composition, diversity, and species
richness was detected. Removal of this invader did not change native intertidal
assemblage structure in either harbour or south coast sites.
Lastly, effects of different nutrient regimes and light intensities on early development and
reproduction of U. pinnatifida…
Advisors/Committee Members: Phillips, Nicole, Zuccarello, Joe.
Subjects/Keywords: Invasive species; Macroalgae; Nutrients
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Morelissen, B. (2012). Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/2022
Chicago Manual of Style (16th Edition):
Morelissen, Bionda. “Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand.” 2012. Doctoral Dissertation, Victoria University of Wellington. Accessed January 23, 2021.
http://hdl.handle.net/10063/2022.
MLA Handbook (7th Edition):
Morelissen, Bionda. “Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand.” 2012. Web. 23 Jan 2021.
Vancouver:
Morelissen B. Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2012. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10063/2022.
Council of Science Editors:
Morelissen B. Ecological Effects of Undaria pinnatifida (Harvey) Suringar and Nutrient-Enrichment
on Intertidal Assemblages in the Wellington Region of New Zealand. [Doctoral Dissertation]. Victoria University of Wellington; 2012. Available from: http://hdl.handle.net/10063/2022
16.
Cardinal, Pascal.
Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms.
Degree: Chemistry, 2013, University of Manitoba
URL: http://hdl.handle.net/1993/17600
► Wastewaters from rural sewage lagoons in Manitoba contain pharmaceuticals that are potentially harmful to non-target organisms and reduce overall water quality when released. An option…
(more)
▼ Wastewaters from rural sewage lagoons in Manitoba contain pharmaceuticals that
are potentially harmful to non-target organisms and reduce overall water quality when
released. An option for reducing exposure to wastewater contaminants and potential
toxicity is surface flow treatment wetlands. However, little is known of the fate of
pharmaceuticals in these types of systems. The fate and effects of six pharmaceuticals
(carbamazepine, clofibric acid, fluoxetine, naproxen, sulfamethoxazole, sulfapyridine)
were assessed in mesocosms simulating treatment wetlands in two separate 28-day
experiments in the summer and fall of 2011, respectively: with and without significant
aquatic plant communities, and with additional
nutrients and harvesting of biomass. The
removal of pharmaceuticals had half-lives that ranged from 0.23 to 9.4 days and 1.4 to 18
days during the summer and fall, respectively, and were predicted to occur primarily
through photolysis and sorption. No overt toxicity from pharmaceuticals was observed
for the common wetland macrophytes Myriophyllum sibiricum and Typha spp., but there
was partitioning and bioaccumulation into macrophyte biomass. Treatment wetlands
appeared to reduce pharmaceuticals and
nutrients adequately, and may be a cost-effective
means of treating rural wastewater.
Advisors/Committee Members: Wong, Charles S (Chemistry) (supervisor), Wang, Fei (Chemistry) Freund, Michael (Chemistry)Hanson, Mark L (Environment and Geography) (examiningcommittee).
Subjects/Keywords: mesocosms; pharmaceuticals; wastewater; nutrients
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Cardinal, P. (2013). Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/17600
Chicago Manual of Style (16th Edition):
Cardinal, Pascal. “Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms.” 2013. Masters Thesis, University of Manitoba. Accessed January 23, 2021.
http://hdl.handle.net/1993/17600.
MLA Handbook (7th Edition):
Cardinal, Pascal. “Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms.” 2013. Web. 23 Jan 2021.
Vancouver:
Cardinal P. Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms. [Internet] [Masters thesis]. University of Manitoba; 2013. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1993/17600.
Council of Science Editors:
Cardinal P. Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms. [Masters Thesis]. University of Manitoba; 2013. Available from: http://hdl.handle.net/1993/17600

University of Miami
17.
Zamora, Lauren M.
Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic.
Degree: PhD, Marine and Atmospheric Chemistry (Marine), 2010, University of Miami
URL: https://scholarlyrepository.miami.edu/oa_dissertations/477
► Atmospheric nitrogen deposition to the ocean has more than doubled in the past 150 years due to anthropogenic activity, reaching levels comparable with nitrogen…
(more)
▼ Atmospheric nitrogen deposition to the ocean has more than doubled in the past 150 years due to anthropogenic activity, reaching levels comparable with nitrogen fixation in the subtropical North Atlantic. Previous studies have suggested that atmospherically deposited N may increase export production, decrease surface water phosphate levels, and substantially impact geochemical estimates of nitrogen fixation. This dissertation reports on the magnitude and biogeochemical fate of soluble N and P deposition in the subtropical North Atlantic. Aerosol and wet deposition time-series samples were used to determine the fluxes, sources, and N:P ratios of atmospheric nutrient deposition. Based on the magnitudes of total soluble N and P deposition, atmospheric
nutrients are estimated to supply ~10-50% of allochthonous N to the North Atlantic subtropical gyre. Samples gathered in Barbados, the Canary Islands, and Miami indicate that atmospheric N sources are primarily anthropogenic (and thus, increasing) and that P sources are primarily natural (and thus relatively steady). Because inorganic nutrient concentrations in surface waters are in the low nM range, increasing P stress in surface waters may occur as a result of increasing N deposition. This assessment is supported by modeling studies, which also indicate that deposition would enhance surface P depletion. Inorganic N contributes nearly all (85-87%) of atmospherically deposited soluble N; the majority (~60%) of the remaining soluble organic N is comprised of an incompletely characterized pool of volatile basic organic N. Water soluble organic P contributes ~20-50% of soluble P. Because organic P contributes a relatively higher portion of soluble P as compared to organic N, the inclusion of organic matter in deposition estimates could both enhance the expected level of export production and reduce the predicted levels of P stress induced by atmospheric deposition. Further modeling studies indicate that the fate of atmospheric
nutrients in the subtropical North Atlantic is controlled by non-Redfieldian processes, and that atmospheric
nutrients eventually accumulate in the main thermocline. The research presented here suggests that future increases in atmospheric N emissions could have long-term impacts on surface ocean biology and nutrient cycles in the subtropical North Atlantic.
Advisors/Committee Members: Dennis A. Hansell, Rana Fine, Donald Olson, Joseph Prospero, Jia-Zhong Zhang.
Subjects/Keywords: Nutrients; New Production; Global Change
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zamora, L. M. (2010). Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic. (Doctoral Dissertation). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_dissertations/477
Chicago Manual of Style (16th Edition):
Zamora, Lauren M. “Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic.” 2010. Doctoral Dissertation, University of Miami. Accessed January 23, 2021.
https://scholarlyrepository.miami.edu/oa_dissertations/477.
MLA Handbook (7th Edition):
Zamora, Lauren M. “Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic.” 2010. Web. 23 Jan 2021.
Vancouver:
Zamora LM. Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic. [Internet] [Doctoral dissertation]. University of Miami; 2010. [cited 2021 Jan 23].
Available from: https://scholarlyrepository.miami.edu/oa_dissertations/477.
Council of Science Editors:
Zamora LM. Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic. [Doctoral Dissertation]. University of Miami; 2010. Available from: https://scholarlyrepository.miami.edu/oa_dissertations/477

Baylor University
18.
Bian, Jingyi, 1985-.
Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba.
Degree: MS, Environmental Science., 2011, Baylor University
URL: http://hdl.handle.net/2104/8119
► Though nutrients and silver often co-occur in aquatic ecosystems, the combined effects of these environmental stressors on aquatic plants are poorly understood. Such coexposures are…
(more)
▼ Though
nutrients and silver often co-occur in aquatic ecosystems, the combined effects of these environmental stressors on aquatic plants are poorly understood. Such coexposures are important because nanosilver is increasingly released to the environment, and recent studies indicate that the dissolved fraction of nanosilver appears to be more acutely toxic to aquatic life. The primary objective of this study was to understand the effects of nitrogen (N) and phosphorus (P) concentrations and N : P ratios on the toxicity of ionic silver toxicity to the model aquatic macrophyte Lemna gibba over 7-d study periods. The experimental results indicated that L. gibba were more sensitive to silver (e.g., lower EC50 values) when N and P concentrations were higher. In addition, greater ionic silver toxicity occurred under higher P-availability (e.g., lower N : P ratios) conditions. L. gibba frond number and fresh weight were also differentially affected and showed variable sensitivity to different nutrient x silver treatment combinations, which highlights the importance of considering site-specific nutrient conditions during the prospective and retrospective assessment and management of silver impacts to primary producers.
Advisors/Committee Members: Brooks, Bryan W. (advisor).
Subjects/Keywords: Aquatic ecosystems.; Nutrients.; Aquatic toxicity.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bian, Jingyi, 1. (2011). Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/8119
Chicago Manual of Style (16th Edition):
Bian, Jingyi, 1985-. “Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba.” 2011. Masters Thesis, Baylor University. Accessed January 23, 2021.
http://hdl.handle.net/2104/8119.
MLA Handbook (7th Edition):
Bian, Jingyi, 1985-. “Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba.” 2011. Web. 23 Jan 2021.
Vancouver:
Bian, Jingyi 1. Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba. [Internet] [Masters thesis]. Baylor University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/2104/8119.
Council of Science Editors:
Bian, Jingyi 1. Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba. [Masters Thesis]. Baylor University; 2011. Available from: http://hdl.handle.net/2104/8119

University of Manitoba
19.
Hertam, Susan.
The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba.
Degree: Biological Sciences, 2010, University of Manitoba
URL: http://hdl.handle.net/1993/4207
► Common Carp, (Cyprinus carpio), have long been associated with the degradation of wetlands worldwide. Through their feeding activities they resuspend sediments leading to reductions in…
(more)
▼ Common Carp, (Cyprinus carpio), have long been associated with the degradation of wetlands worldwide. Through their feeding activities they resuspend sediments leading to reductions in the abundance and diversity of submerged macrophytes, and the alteration of water chemistry which can lead to the phytoplankton-dominated state. This study took in Delta Marsh, a freshwater coastal wetland of Lake Manitoba, in Manitoba, Canada. It was the second part of a four-year study in which baseline data were collected in 2001 from ten ponds (1-13 ha) with varying degrees of connectivity to the main marsh and carp-accessibility. I continued to monitor a subset of the control and altered ponds two and three years following their alteration (2003 and 2004); I included new ponds, including one large open bay (20.3 ha). The overall four-year study has shown that the presence of carp is at least partially responsible for the turbid, phytoplankton-dominated state that exists in Delta Marsh, and that carp abundance is an important factor. Ponds previously isolated then exposed to carp activity, particularly in the spring when they were gathered at high densities, shifted to the turbid, phytoplankton-dominated state with few macrophytes, and the removal of carp from ponds led to the clear-water state, though not necessarily an abundance of macrophytes. Due to the complexity of natural ecosystems, the effects of carp were not as predictable as smaller-scale studies would suggest. In my study, water quality, submerged vegetation biomass and algal growth varied both temporally and spatially in carp-accessible and carp-free ponds. Nutrient deficiency among periphyton assemblages was hypothesized to be alleviated by the presence of carp. Using nutrient diffusing substrata, I found that nutrient deficiencies varied from year to year among carp-free and carp-accessible ponds. In 2003 the hypothesis was supported, however, in 2004 two of the carp-free ponds exhibited no-nutrient limitations to periphyton assemblages while N and P co-limitation became prevalent in one carp-accessible pond. Parameters over which there was no control, such as the spatial and temporal distribution of carp, their density within a pond, water depth and unquantified top-down effects, including zooplankton grazing, may have contributed to the variability of the results.
Advisors/Committee Members: Goldsborough, Gordon (Biological Sciences) (supervisor), Robinson, Gordon (Biological Sciences).
Subjects/Keywords: common carp; nutrients; wetland; macrophytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hertam, S. (2010). The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/4207
Chicago Manual of Style (16th Edition):
Hertam, Susan. “The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba.” 2010. Masters Thesis, University of Manitoba. Accessed January 23, 2021.
http://hdl.handle.net/1993/4207.
MLA Handbook (7th Edition):
Hertam, Susan. “The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba.” 2010. Web. 23 Jan 2021.
Vancouver:
Hertam S. The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba. [Internet] [Masters thesis]. University of Manitoba; 2010. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1993/4207.
Council of Science Editors:
Hertam S. The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba. [Masters Thesis]. University of Manitoba; 2010. Available from: http://hdl.handle.net/1993/4207

University of Bridgeport
20.
Manning, Jasmine.
Gestational Diabetes and the Role of Specific Nutrients and Herbs
.
Degree: 2014, University of Bridgeport
URL: https://scholarworks.bridgeport.edu/xmlui/handle/123456789/1416
► Objective – The purpose of this study was to evaluate the five most common substances, whether herb or nutrient, that are given for alternative treatment…
(more)
▼ Objective – The purpose of this study was to evaluate the five most common substances, whether herb or nutrient, that are given for alternative treatment of gestational diabetes. This study looked at the research for effectiveness and action in diabetes mellitus type II, as well as specific dose safety for use during pregnancy. The main goal was to find effective treatments for gestational diabetes, in addition to the standard low carbohydrate diet and exercise prescribed. Basic procedures – The database used was The University of Bridgeport’s digital library Eureka! Papers were chosen that were available in full text, that were published in the past 20 years and that used monosupplementation. Main Findings – Cinnamon showed the ability to act as an insulin sensitizer and lower HgA1c. Chromium showed possible effects of increasing insulin receptor sensitivity. Momordica charantia increased the speed of glucose uptake in a dose dependent form. Gymnema sylvestre increased insulin secretion from the pancreas and showed comparable antioxidant effects to that of alpha-tocopherol reducing triglyceride and LDL cholesterol levels and increasing glutathione and HDL levels. Alpha lipoic acid showed antioxidant actions and has the capability to reduce and prevent diabetic polyneuropathies. Principal conclusions – Momordica, chromium and alpha lipoic acid are all very safe and should be used during gestational diabetes. Cinnamon should be used only in amounts used in cooking i.e. ½-1 tsp daily. Gymnema should be used with caution if at all and should be taken only in its whole form perhaps as an aqueous infusion.
Subjects/Keywords: Naturopathy;
Gestational diabetes;
Nutrients;
Herbs
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Manning, J. (2014). Gestational Diabetes and the Role of Specific Nutrients and Herbs
. (Thesis). University of Bridgeport. Retrieved from https://scholarworks.bridgeport.edu/xmlui/handle/123456789/1416
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Manning, Jasmine. “Gestational Diabetes and the Role of Specific Nutrients and Herbs
.” 2014. Thesis, University of Bridgeport. Accessed January 23, 2021.
https://scholarworks.bridgeport.edu/xmlui/handle/123456789/1416.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Manning, Jasmine. “Gestational Diabetes and the Role of Specific Nutrients and Herbs
.” 2014. Web. 23 Jan 2021.
Vancouver:
Manning J. Gestational Diabetes and the Role of Specific Nutrients and Herbs
. [Internet] [Thesis]. University of Bridgeport; 2014. [cited 2021 Jan 23].
Available from: https://scholarworks.bridgeport.edu/xmlui/handle/123456789/1416.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Manning J. Gestational Diabetes and the Role of Specific Nutrients and Herbs
. [Thesis]. University of Bridgeport; 2014. Available from: https://scholarworks.bridgeport.edu/xmlui/handle/123456789/1416
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Halmstad University
21.
Magno, Concepción.
Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients.
Degree: Business and Engineering (SET), 2008, Halmstad University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2183
► The continuous discharge of sewage with significant nutrient loads into coastal waters, is causing a dramatic deterioration of the environment due to eutrophication processes.…
(more)
▼ The continuous discharge of sewage with significant nutrient loads into coastal waters, is causing a dramatic deterioration of the environment due to eutrophication processes. Actually, some practices are being taken into account in aquaculture as the integration of seaweed in fish-farming to control the level of nutrients generated. In order to study the capability of macroalgae for removing nutrients, six species of the Mediterranean Coast of Southern Europe (Corallina elongata, Ulva olivascens, Halopteris scoparia, Cystoseira mediterranea, Laurencia pinnatifida and Enteromorpha sp.) were studied in laboratory experiments. The specimens were incubated in different external nutrient load conditions to determine the uptake rate of nitrate and phosphate, and the internal concentrations of these species were analysed to obtain the concentration factor for both nutrients. The results obtained show that these algae remove nutrients efficiently from the medium and the uptake rates follow saturation kinetics in normal conditions. U.olivascens had the highest uptake rate for both nitrate and phosphate while C.elongata and H.scoparia had the highest concentration factor for nitrate and phosphate respectively. These results indicate that integration of these species in intensive fish-farming may play an increasingly important role as a nutrient-removal system, alleviating eutrophication problems due to fed aquaculture.
Subjects/Keywords: Sewage; nutrients
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APA (6th Edition):
Magno, C. (2008). Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2183
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Magno, Concepción. “Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients.” 2008. Thesis, Halmstad University. Accessed January 23, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2183.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Magno, Concepción. “Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients.” 2008. Web. 23 Jan 2021.
Vancouver:
Magno C. Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients. [Internet] [Thesis]. Halmstad University; 2008. [cited 2021 Jan 23].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2183.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Magno C. Evaluation of several macroalgae species common to the Mediterranean sea to be used as biofilters of nutrients. [Thesis]. Halmstad University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2183
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Connecticut
22.
Rollinson, Veronica.
Sources and Fluxes of Reactive N in a Southern New England River.
Degree: MS, Oceanography, 2020, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/1510
► Little Narraganset Bay has seen an increase in filamentous algae, colloquially known as cladophora, over the past twenty years. The Pawcatuck River is the…
(more)
▼ Little Narraganset Bay has seen an increase in filamentous algae, colloquially known as cladophora, over the past twenty years. The Pawcatuck River is the dominant input of freshwater to Little Narraganset bay, delineating the Connecticut and Rhode Island border. There are three point sources of nitrogen on the river system: two waste water treatment facilities (WWTF) in the estuary and one fabric processing plant within the upper-watershed in Kenyon, RI. Non-point sources include a myriad of farms specializing in turf and animal husbandry, as well as septic systems for the majority of the watershed that are not serviced by the WWTFs. Prior research has produced yearly flux estimates of nitrogen (N) yet point to different anthropogenic sources including sewage for estuarine WWTF and fertilizer from upriver as predominant nutrient sources of N algal growth. Samplings, conducted weekly for an annual cycle, at the Westerly and Stillman Bridges at the mouth of the Pawcatuck River – upstream of seawater intrusion, and seasonal down-river transects from Wakefield, RI to Westerly, RI were collected in order to track seasonal changes and determine sources of N along the river.
Nutrients of N (nitrate, nitrite, and ammonium), phosphate, and nitrate isotopes were measured at each sampling point. Nitrate isotopes provided additional power for analysis to help differentiate various input sources into the river as well as to determine cycling of N on the river. Results indicate that there were significant seasonal variations in nutrient input of nitrate and ammonia linked to seasonal discharge rates where high discharge occurs in the winter and low flow occurs in the summer. With seasonal discharge rates, the WWTFs contribute negligible amounts of N to the river in winter and up to 15% of the loading in the summer. Results also signify that the overall annual flux of the Pawcatuck river into Little Narraganset Bay are consistent with prior estimates, where DIN, DON, and TN export is equal to 18 x 10
6, 15 x 10
6, and 32 x 10
6 moles of N per year respectively indicating there have been no major changes N flux in the upper river.
Advisors/Committee Members: Julie Granger, Craig Tobias, Claudia Koerting, Jamie Vaudrey, Dr. Julie Granger.
Subjects/Keywords: Nutrients; river; isotopes; nitrogen; d15N
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Rollinson, V. (2020). Sources and Fluxes of Reactive N in a Southern New England River. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/1510
Chicago Manual of Style (16th Edition):
Rollinson, Veronica. “Sources and Fluxes of Reactive N in a Southern New England River.” 2020. Masters Thesis, University of Connecticut. Accessed January 23, 2021.
https://opencommons.uconn.edu/gs_theses/1510.
MLA Handbook (7th Edition):
Rollinson, Veronica. “Sources and Fluxes of Reactive N in a Southern New England River.” 2020. Web. 23 Jan 2021.
Vancouver:
Rollinson V. Sources and Fluxes of Reactive N in a Southern New England River. [Internet] [Masters thesis]. University of Connecticut; 2020. [cited 2021 Jan 23].
Available from: https://opencommons.uconn.edu/gs_theses/1510.
Council of Science Editors:
Rollinson V. Sources and Fluxes of Reactive N in a Southern New England River. [Masters Thesis]. University of Connecticut; 2020. Available from: https://opencommons.uconn.edu/gs_theses/1510

University of Florida
23.
Julian, Paul.
Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas.
Degree: PhD, Soil and Water Sciences, 2018, University of Florida
URL: https://ufdc.ufl.edu/UFE0052188
► Wetlands are essential biogeochemical hotspots with fundamentally important landscape scale functions and processes that regulate the flow of nutrients and energy across the landscape. Ecosystem…
(more)
▼ Wetlands are essential biogeochemical hotspots with fundamentally important landscape scale functions and processes that regulate the flow of
nutrients and energy across the landscape. Ecosystem services provided by wetlands include carbon and nutrient sequestration as well as climate and hydrologic regulators. Treatment wetlands leverage these ecosystem services to remove excessive
nutrients from surface waters, which otherwise would impact downstream nutrient sensitive (oligotrophic) river, wetland and coastal ecosystems. Therefore, understanding nutrient biogeochemistry within treatment wetlands is essential to ensure effective and efficient operation of these systems and maximize ecosystem services.
Advisors/Committee Members: WRIGHT,ALAN LEE (committee chair), NEWMAN,SUSAN (committee member), OSBORNE,TODD Z (committee member), BRENNER,MARK (committee member).
Subjects/Keywords: carbon – homeostasis – nutrients – stoichiometry – wetland
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APA (6th Edition):
Julian, P. (2018). Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0052188
Chicago Manual of Style (16th Edition):
Julian, Paul. “Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas.” 2018. Doctoral Dissertation, University of Florida. Accessed January 23, 2021.
https://ufdc.ufl.edu/UFE0052188.
MLA Handbook (7th Edition):
Julian, Paul. “Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas.” 2018. Web. 23 Jan 2021.
Vancouver:
Julian P. Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas. [Internet] [Doctoral dissertation]. University of Florida; 2018. [cited 2021 Jan 23].
Available from: https://ufdc.ufl.edu/UFE0052188.
Council of Science Editors:
Julian P. Biogeochemical Controls of Water Column Productivity and Nutrient Cycling in Semitropical Wetlands A Case Study from the Everglades Stormwater Treatment Areas. [Doctoral Dissertation]. University of Florida; 2018. Available from: https://ufdc.ufl.edu/UFE0052188

Utah State University
24.
Hobson, Andrew J.
Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria.
Degree: MS, Civil and Environmental Engineering, 2013, Utah State University
URL: https://digitalcommons.usu.edu/etd/1511
► The in-stream water quality model, QUAL2Kw, can provide guidance in watershed management decisions by linking changes in nutrient loads to responses in water quality.…
(more)
▼ The in-stream water quality model, QUAL2Kw, can provide guidance in watershed management decisions by linking changes in nutrient loads to responses in water quality. This model is particularly useful for determining wasteload allocations, aiding in total maximum daily load analyses, and developing numeric nutrient criteria. Unfortunately, states struggle to balance the data collection and modeling requirements to accomplish many of these water quality management tasks due to limited resources. This commonly results in routine data collection and monitoring efforts that do not satisfy the data requirements for modeling. To address this disconnect, this study presents a data collection and parameter calibration methodology suited to meet general QUAL2Kw modeling requirements. Then, with the goal of identifying a range of numeric nitrogen and phosphorus criteria, this general data collection and modeling strategy was applied to sites throughout Utah. To help automate and test scenarios targeted at tracking effects of loading and response combinations, a nutrient criteria tool was also developed to interface with these QUAL2Kw models. By implementing the tool on these models, input concentrations of ammonium (NH4+) ranging from 10 to 101 µg/L and inorganic phosphorus (PO4-) ranging from 1 to 14 µg/L were found to exceed thresholds of bottom algae, gross primary productivity, and ecosystem respiration. Conversely, NH4+ concentrations above 3,500 µg/L and PO4- above 490 µg/L exceeded dissolved oxygen thresholds of 5-6 mg/L in some applications. Some limitations of using mechanistic models in this manner were identified, including model capabilities (e.g., steady-state versus dynamic), inclusion of appropriate processes, uncertainty in calibrated parameters, and site-specific conditions. Although many problems will require more complex modeling efforts with significantly larger data collection efforts, this approach provides an initial framework that aids in the judicial use of resources to aid in watershed management decisions.
Advisors/Committee Members: Bethany T. Neilson, William J. Doucette, Michelle A. Baker, ;.
Subjects/Keywords: Modeling; Nutrients; QUAK2Kw; Environmental Engineering
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APA ·
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Vancouver ·
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APA (6th Edition):
Hobson, A. J. (2013). Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/1511
Chicago Manual of Style (16th Edition):
Hobson, Andrew J. “Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria.” 2013. Masters Thesis, Utah State University. Accessed January 23, 2021.
https://digitalcommons.usu.edu/etd/1511.
MLA Handbook (7th Edition):
Hobson, Andrew J. “Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria.” 2013. Web. 23 Jan 2021.
Vancouver:
Hobson AJ. Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria. [Internet] [Masters thesis]. Utah State University; 2013. [cited 2021 Jan 23].
Available from: https://digitalcommons.usu.edu/etd/1511.
Council of Science Editors:
Hobson AJ. Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria. [Masters Thesis]. Utah State University; 2013. Available from: https://digitalcommons.usu.edu/etd/1511

University of Arkansas
25.
Rollans, Justin Ray.
Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed.
Degree: MS, 2018, University of Arkansas
URL: https://scholarworks.uark.edu/etd/3030
► Over 25 percent of the world’s population either lives on or obtains water from karst aquifers. The complex interactions between subsurface karst geologic features,…
(more)
▼ Over 25 percent of the world’s population either lives on or obtains water from karst aquifers. The complex interactions between subsurface karst geologic features, the constant motion of the plant life cycle, and significant water resource demand all suggest the need to better define those interactions. The relationship of historical land surface phenology and water quality in karst topography were investigated in the Headwaters Illinois River watershed in Northwest Arkansas (NWA). This area represents high vulnerability to surface water and groundwater contamination, with both natural and anthropogenic processes such as over application of broil litter for enhanced cattle browse, affecting groundwater quality. Land surface phenology patterns influenced by these processes were identified using Landsat satellite imagery and object-based image analysis (OBIA). A normalized difference vegetation index (NDVI) time series was produced using Google Earth Engine for all passes over the study area that meet atmospheric and data quality criteria over two decades from 1999 to 2018. Analysis of NDVI and ancillary data over time allowed insight into vegetation health norms, deviation from those norms, and human impact upon regional vegetation. OBIA techniques were used to segment vegetation index time series pixels into polygons based on adjacency and similarity. Resulting polygons were categorized using an unsupervised clustering approach, and were labeled based on visual and expert interpretation of the study area. The relation of the image analysis results to groundwater quality was determined using data organized by hydrologic catchments within the study area. Comparison of the decadal water quality data and NDVI image analysis resulted in meaningful temporal patterns within the datasets but showed a near 0 slope for NDVI and water quality metrics. Future LSP studies should consider areas with greater spatial and temporal availability of water quality metrics and variable surface/groundwater interactions.
Advisors/Committee Members: Jason A. Tullis, Fred Limp Jr., John V. Brahana.
Subjects/Keywords: NDVI; Nutrients; Phenology; Remote Sensing
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
Rollans, J. R. (2018). Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed. (Masters Thesis). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3030
Chicago Manual of Style (16th Edition):
Rollans, Justin Ray. “Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed.” 2018. Masters Thesis, University of Arkansas. Accessed January 23, 2021.
https://scholarworks.uark.edu/etd/3030.
MLA Handbook (7th Edition):
Rollans, Justin Ray. “Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed.” 2018. Web. 23 Jan 2021.
Vancouver:
Rollans JR. Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2021 Jan 23].
Available from: https://scholarworks.uark.edu/etd/3030.
Council of Science Editors:
Rollans JR. Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed. [Masters Thesis]. University of Arkansas; 2018. Available from: https://scholarworks.uark.edu/etd/3030
26.
Bryce, Casey Catherine.
Microbial stress in rock habitats.
Degree: PhD, 2015, University of Edinburgh
URL: http://hdl.handle.net/1842/15776
► Micro-organisms are the most abundant and diverse form of life on Earth. Their ability to tolerate stress has enabled them to colonise many inhospitable environments.…
(more)
▼ Micro-organisms are the most abundant and diverse form of life on Earth. Their ability to tolerate stress has enabled them to colonise many inhospitable environments. Microbial processes alter the chemistry of the environment which has left a lasting mark on the geological record. On the other hand, microbial life is heavily influenced by environmental conditions. Indeed, the history of the Earth is shaped by the co-evolution of microbial and geological processes. This thesis explores how micro-organisms are influenced by their environment, with particular reference to microbial rock habitats. Rock habitats are an interesting system to understand the inter-relationship between microbial life and it's environment as they are relatively simple and very common. Rock-dwelling communities are also exposed to numerous stresses such as surface UV exposure, desiccation, temperature fluctuations, low nutrient availability or toxicity from elements leached from the rocks themselves. Three specific aspects of microbial stress in rock environments are investigated here: 1) The use of rocks as a shield from surface UV radiation stress, 2) The microbial response to chemical changes during water-rock interactions, 3) The effect of simultaneous limitation of more than one nutrient. The first uses exposure facilities aboard the International Space Station to provide empirical evidence that colonisation of the early land masses by phototrophs was not inhibited by high surface UV radiation. The latter studies use quantitative proteomics to investigate the cellular response of a heterotrophic bacterium to nutrient deficiency and element leaching, two common stresses in rock habitats. Together these results further our understanding of the relationship between micro-organisms and rocks, both today and over geological time.
Subjects/Keywords: 579; geomicrobiology; proteomics; nutrients; ISS
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APA (6th Edition):
Bryce, C. C. (2015). Microbial stress in rock habitats. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/15776
Chicago Manual of Style (16th Edition):
Bryce, Casey Catherine. “Microbial stress in rock habitats.” 2015. Doctoral Dissertation, University of Edinburgh. Accessed January 23, 2021.
http://hdl.handle.net/1842/15776.
MLA Handbook (7th Edition):
Bryce, Casey Catherine. “Microbial stress in rock habitats.” 2015. Web. 23 Jan 2021.
Vancouver:
Bryce CC. Microbial stress in rock habitats. [Internet] [Doctoral dissertation]. University of Edinburgh; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1842/15776.
Council of Science Editors:
Bryce CC. Microbial stress in rock habitats. [Doctoral Dissertation]. University of Edinburgh; 2015. Available from: http://hdl.handle.net/1842/15776

University of Waterloo
27.
Van Meter, Kimberly.
The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls.
Degree: 2016, University of Waterloo
URL: http://hdl.handle.net/10012/10896
► Global population has seen a more than threefold increase over the last 100 years, accompanied by rapid changes in land use and a dramatic intensification…
(more)
▼ Global population has seen a more than threefold increase over the last 100 years, accompanied by rapid changes in land use and a dramatic intensification of agriculture. Such changes have been driven by a great acceleration of the global nitrogen (N) cycle, with N fertilizer use now estimated to be 100 Tg/year globally. Excess N commonly finds its way into both groundwater and surface water, leading to long-term problems of hypoxia, aquatic toxicity and drinking water contamination. Despite ongoing efforts to improve water quality in agroecosystems, results have often been disappointing, with significant lag times between adoption of accepted best management practices (BMPs) and measurable improvements in water quality. It has been hypothesized that such time lags are a result of the buildup of legacy N within the landscape over decades of fertilizer application and agricultural intensification.
The central theme of my research has been an exploration of this N legacy, including (1) an investigation of the form, locations and magnitudes of legacy N stores within intensively managed catchments; (2) development of a parsimonious, process-based modeling framework for quantifying catchment-scale time lags based on both soil nutrient accumulations (biogeochemical legacy) and groundwater travel time distributions (hydrologic legacy); and (3) use of a statistical approach to both quantifying N-related time lags at the watershed scale, and identifying the primary physical and management controls on these lags.
As a result of these explorations I am able to provide the first direct, large-scale evidence of N accumulation in the root zones of agricultural soils, accumulation that may account for much of the ‘missing N’ identified in mass balance studies of heavily impacted watersheds. My analysis of long-term soil data (1957-2010) from 206 sites throughout the Mississippi River Basin (MRB) revealed N accumulation in cropland of 25-70 kg ha-1 y-1, a total of 3.8 ± 1.8 Mt y-1 at the watershed scale. A simple modeling framework was then used to show that the observed accumulation of soil organic N (SON) in the MRB over a 30-year period (142 Tg N) would lead to a biogeochemical lag time of 35 years for 99% of legacy SON, even with a complete cessation of fertilizer application.
A parsimonious, process-based model, ELEMeNT (Exploration of Long-tErM Nutrient Trajectories), was then developed to quantify catchment-scale time lags based on both soil N accumulation (biogeochemical legacy) and groundwater travel time distributions (hydrologic legacy). The model allowed me to predict the time lags observed in a 10 km2 Iowa watershed that had undergone a 41% conversion of area from row crop to native prairie. The model results showed that concentration reduction benefits are a function of the spatial pattern of implementation of conservation measures, with preferential conversion of land parcels having the shortest catchment-scale travel times providing greater concentration reductions as well as faster response times. This…
Subjects/Keywords: nitrogen; legacy; nutrients; biogeochemistry; hydrology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Van Meter, K. (2016). The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/10896
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Van Meter, Kimberly. “The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls.” 2016. Thesis, University of Waterloo. Accessed January 23, 2021.
http://hdl.handle.net/10012/10896.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Van Meter, Kimberly. “The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls.” 2016. Web. 23 Jan 2021.
Vancouver:
Van Meter K. The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10012/10896.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Van Meter K. The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/10896
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Louisiana State University
28.
Ialeggio, James Stephen.
Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation.
Degree: MS, Environmental Sciences, 2013, Louisiana State University
URL: etd-06102014-192930
;
https://digitalcommons.lsu.edu/gradschool_theses/3020
► Freshwater diversions are a relatively recently utilized tool in wetland loss mitigation that stimulate an organic accretion response in marsh vegetation, which is based in…
(more)
▼ Freshwater diversions are a relatively recently utilized tool in wetland loss mitigation that stimulate an organic accretion response in marsh vegetation, which is based in root production and thus belowground biomass. The effectiveness of freshwater diversions in slowing marsh loss probably varies across a gradient of the factors they supply: decreased salinity, increased nutrient concentrations, and increased inundation. Flooding stress is commonly thought to be the overriding factor limiting wetland vegetation growth, however its influence may vary across salinity and nutrients. Therefore, plugs of Spartina patens were planted in four “marsh organs” consisting each of 36 sediment-filled PVC pipes of incremental heights that created a range of growth elevation and thus flooding stress. The organs were located in mean salinities from 2.6-14.7 ppt and two of them fertilized at 22 g N m-2, 11 g P m-2, and 5.5 g K m-2. Twice during the growing season below- and aboveground biomass was harvested, sorted, dried, weighed, and analyzed for relationships between variables. Flooding stress was found to be primary, with a secondary interactive effect between salinity and fertilization that suggests fertilization may help plants resist relatively higher salinity levels. Variations in salinity and nutrient concentrations associated with freshwater diversions, which can differ in intensity and extent, might also be linked to increased nutria herbivory. Therefore, nutria preference for fertilized versus unfertilized vegetation was also tested in a controlled setting on Panicum hemitomon, Sagittaria lancifolia, and S. patens, representative dominant plant species of fresh, fresh-brackish, and brackish marsh. Nutria showed a significant preference for fertilized vegetation within species. It is therefore possible that benefits derived from nutrient-rich fresh floodwater could potentially be negatively impacted by increased preferential herbivory.
Subjects/Keywords: wetland ecology; wildlife; wetlands; nutrients
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ialeggio, J. S. (2013). Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation. (Masters Thesis). Louisiana State University. Retrieved from etd-06102014-192930 ; https://digitalcommons.lsu.edu/gradschool_theses/3020
Chicago Manual of Style (16th Edition):
Ialeggio, James Stephen. “Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation.” 2013. Masters Thesis, Louisiana State University. Accessed January 23, 2021.
etd-06102014-192930 ; https://digitalcommons.lsu.edu/gradschool_theses/3020.
MLA Handbook (7th Edition):
Ialeggio, James Stephen. “Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation.” 2013. Web. 23 Jan 2021.
Vancouver:
Ialeggio JS. Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2021 Jan 23].
Available from: etd-06102014-192930 ; https://digitalcommons.lsu.edu/gradschool_theses/3020.
Council of Science Editors:
Ialeggio JS. Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation. [Masters Thesis]. Louisiana State University; 2013. Available from: etd-06102014-192930 ; https://digitalcommons.lsu.edu/gradschool_theses/3020

Massey University
29.
Sunlarp Sanguandeekul.
The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.).
Degree: PhD, Plant Science, 1999, Massey University
URL: http://hdl.handle.net/10179/2452
► Two series of experiments were carried out to examine the effect of nutrient solution concentration on nutrient uptake, growth and quality of Nutrient Film Technique…
(more)
▼ Two series of experiments were carried out to examine the effect of nutrient solution concentration on nutrient uptake, growth and quality of Nutrient Film Technique grown lettuce at the Plant Growth Unit, Massey University. In the first study, the influence of nutrient solution concentration, ranging from 0.5 to 3.5 mS cm-1 and growing season, on plant nutrient uptake, growth, yield, market quality and nutritional quality of three lettuce cultivars was examined. The second study researched approaches to controlling tipburn incidence of lettuce by investigating the effect of day/night nutrient solution concentration combinations and extra calcium at 100 mg Ca 1-1 at night with the butterhead lettuce cultivar Cortina. Here the plants were exposed to a tipburn inducing treatment of 30° C for 4 days. The results from these studies revealed that generally there were not large variations in nitrogen and phosphorus concentrations of the leaves across nutrient solution concentrations. Leaf potassium concentration increased with increasing nutrient solution concentration up to 2.5 mS cm-1. As leaf potassium increased in concentration with increasing nutrient solution concentration, this increase mediated decreases in calcium and magnesium concentrations of the leaves. Leaf nitrogen and potassium concentrations were greater than in the root, the reverse was true for phosphorus, while calcium and magnesium levels did not differ greatly. Nitrogen and phosphorus concentrations increased from the outer to inner leaves, while potassium, calcium and magnesium decreased. Shoot fresh weight and dry weight increased up to 1.5 mS cm-1 with increases in nutrient solution concentration. At higher nutrient solution concentrations dry weight levelled off, while fresh weight levelled off or decreased slowly depending on the level of stress imposed by the season. Thus fresh weight was more sensitive to stress at high nutrient solution concentrations than dry weight. With both seasons and cultivars, the order of the initial RGR was the same order as for final shoot dry weights, with the initial NAR being the important component of the initial RGR. Apart from the autumn crop, where no tipburn occurred, tipburn incidence increased with increasing nutrient solution concentration with the level of incidence increasing as environment stress increased. Shelf life increased with increasing nutrient solution concentration, but the level of increase was not great enough to be of commercial significant. Season, nutrient solution concentration and cultivar all affected the nutritive value. The affect depended on the nutritive quality attribute under consideration. The nutritive values obtained in this study were in the ranges reported by other workers. The summer crop had the highest ascorbic acid concentration. Where ascorbic acid concentrations were high, such as in summer or with the cultivar Impuls, then ascorbic acid concentrations decreased with increases in nutrient solution concentration. The only difference in dietary fibre occurred with the…
Subjects/Keywords: Plant nutrients
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APA (6th Edition):
Sanguandeekul, S. (1999). The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.). (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/2452
Chicago Manual of Style (16th Edition):
Sanguandeekul, Sunlarp. “The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.).” 1999. Doctoral Dissertation, Massey University. Accessed January 23, 2021.
http://hdl.handle.net/10179/2452.
MLA Handbook (7th Edition):
Sanguandeekul, Sunlarp. “The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.).” 1999. Web. 23 Jan 2021.
Vancouver:
Sanguandeekul S. The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.). [Internet] [Doctoral dissertation]. Massey University; 1999. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10179/2452.
Council of Science Editors:
Sanguandeekul S. The effect of cultivar, nutrient solution concentration and season on the yield and quality of NFT produced lettuce (Lactuca sativa L.). [Doctoral Dissertation]. Massey University; 1999. Available from: http://hdl.handle.net/10179/2452

University of Guelph
30.
Schonberger, Zachariah G.
Understanding Ecosystem Dynamics within a Modular Framework.
Degree: MS, Department of Integrative Biology, 2020, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21173
► Food web theory has been successful in using energetic models to understand how food webs are stabilized in space and time. In parallel, ecosystem theory…
(more)
▼ Food web theory has been successful in using energetic models to understand how food webs are stabilized in space and time. In parallel, ecosystem theory has employed nutrient-limited ecosystem models to understand how limiting
nutrients alter the structure and dynamics of food webs. Importantly, while food web theory has gained fundamental insights using a modular framework, ecosystem theory has largely overlooked the role of a key module – the autotroph-limiting nutrient (R-N) module – in modulating the dynamics of nutrient-limited ecosystem models. Here, I revisit the inherent stability of the R-N module and establish strong R-N interactions as potent stabilizers in higher order systems. I do this by first revisiting consumer-resource (C-R) theory and highlight the relationship between the structure of C-R interactions and predictable dynamical outcomes. I then translate this framework to R-N-based systems, showing the R-N module to behave as a coherent extension of current modular food web theory.
Advisors/Committee Members: McCann, Kevin (advisor).
Subjects/Keywords: Ecosystem; Nutrients; Stability; Dynamics; Theory
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schonberger, Z. G. (2020). Understanding Ecosystem Dynamics within a Modular Framework. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21173
Chicago Manual of Style (16th Edition):
Schonberger, Zachariah G. “Understanding Ecosystem Dynamics within a Modular Framework.” 2020. Masters Thesis, University of Guelph. Accessed January 23, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21173.
MLA Handbook (7th Edition):
Schonberger, Zachariah G. “Understanding Ecosystem Dynamics within a Modular Framework.” 2020. Web. 23 Jan 2021.
Vancouver:
Schonberger ZG. Understanding Ecosystem Dynamics within a Modular Framework. [Internet] [Masters thesis]. University of Guelph; 2020. [cited 2021 Jan 23].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21173.
Council of Science Editors:
Schonberger ZG. Understanding Ecosystem Dynamics within a Modular Framework. [Masters Thesis]. University of Guelph; 2020. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21173
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