subject:(nutrients)

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 (6^th 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 (16^th 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 20, 2020. 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 (7^th Edition):

Serenje, Gerald Isaac. “Variations in micronutrient content of Orange-fleshed sweet potato(Ipomoea batatas (L.)Lam) Variaties grown in different environments .” 2011. Web. 20 Jan 2020.

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 2020 Jan 20]. 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

Texas A&M University

2. Holgate, Leon Carl. Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.

Degree: 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)

Subjects/Keywords: Greywater; Soil Nutrients

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APA (6^th Edition):

Holgate, L. C. (2011). Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Holgate, Leon Carl. “Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.” 2011. Thesis, Texas A&M University. Accessed January 20, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Holgate, Leon Carl. “Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition.” 2011. Web. 20 Jan 2020.

Vancouver:

Holgate LC. Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. [Internet] [Thesis]. Texas A&M University; 2011. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Holgate LC. Irrigation Water Source: Effect on Soil Nutrient Dynamics and Microbial Community Composition. [Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7673

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. 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

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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)

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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 (6^th 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 (16^th Edition):

Raina, Bharati. “Carbon sequestration and nutrient dynamics in a long-term lantana amended soil under rice wheat system.” 2002. Thesis, INFLIBNET. Accessed January 20, 2020. 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 (7^th Edition):

Raina, Bharati. “Carbon sequestration and nutrient dynamics in a long-term lantana amended soil under rice wheat system.” 2002. Web. 20 Jan 2020.

Vancouver:

Raina B. Carbon sequestration and nutrient dynamics in a long-term lantana amended soil under rice wheat system. [Internet] [Thesis]. INFLIBNET; 2002. [cited 2020 Jan 20]. 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

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)

Subjects/Keywords: Macro-Nutrients; Inflows

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APA (6^th 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 (16^th Edition):

Abrham, Belete. “Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia. ” 2014. Thesis, Addis Ababa University. Accessed January 20, 2020. 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 (7^th Edition):

Abrham, Belete. “Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia. ” 2014. Web. 20 Jan 2020.

Vancouver:

Abrham B. Estimating Soil Nutrient Balance Of Cereal Lands Of Tigray Region, Northern Ethiopia. [Internet] [Thesis]. Addis Ababa University; 2014. [cited 2020 Jan 20]. 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 (6^th 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 (16^th 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 20, 2020. http://hdl.handle.net/10217/166931.

MLA Handbook (7^th 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. 20 Jan 2020.

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 2020 Jan 20]. 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

6. 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)

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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 (6^th 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 (16^th 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 20, 2020. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-19112007-132922/ ;.

MLA Handbook (7^th 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. 20 Jan 2020.

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 2020 Jan 20]. 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/ ;

Texas A&M University

7. Morales-McDevitt, Maya Erin. Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161637

► During the Deepwater Horizon (DWH) oil spill, profuse marine snow with associated oil, termed marine oil snow (MOS) was observed but quickly disappeared. This research… (more)

▼ During the Deepwater Horizon (DWH) oil spill, profuse marine snow with associated oil, termed marine oil snow (MOS) was observed but quickly disappeared. This research tested the hypothesis that in water with nutrients and microbes MOS formed in the presence of oil and oil plus dispersant. Four mesocosm experiments were undertaken as part of the ADDOMEx Consortium. Water was collected from near-shore (mesocosom 1, 2 and 4) or off-shore (mesocosm 3) in the Gulf of Mexico. Oil (Macondo surrogate oil) and oil plus dispersant (using Corexit 9500) mixtures known as water accommodated fraction (WAF), chemically enhanced water accommodated fraction (CEWAF) were generated in specially designed 170 L baffled recirculation tanks. WAF and CEWAF were then transferred to 106 L mesocosm tanks for the experiment as well as mesocosm control tanks (sea water only) and 10 times diluted CEWAF (DCEWAF) mesocosm tanks. Concentrated phytoplankton were added to mesocosm experiment 1 and 2. Nutrients were added to mesocosum 3 and 4. Estimated oil equivalents (EOE), Total petroleum hydrocarbons (TPH), including n-alkanes and pristine and phytane, NO3-, NO2-, NH4 and HPO4 concentrations of mesocosms were measured over time. Exopolyomeric substances formed within 24 hrs in all treatments including the controls. EOE concentrations decreased at similar rates in all treatments. Oil components were removed by formation and then sedimentation of MOS. Preferential removal of normal alkanes compared to branched alkanes (isoprenoid hydrocarbons) show that biodegradation was also occurring. Study results document that concentrations decreased partially due to sedimentation and biodegradation, although other weathering processes such as evaporation and photo-oxidation may also be responsible for the decrease in hydrocarbons in the mesocosms oil. Correlation between decrease in concentrations of EOE and nutrients indicate growth of microbes is important to MOS formation. The use of mesocosm studies provide a useful tool in understanding the mechanisms of MOS formation and transfer of oil from the water column to sediments. Advisors/Committee Members: Knap, Anthony H (advisor), Wade, Terry L (advisor), Quigg, Antonietta (committee member).

Subjects/Keywords: Nutrients; oil; marine oil snow

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APA (6^th Edition):

Morales-McDevitt, M. E. (2017). Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Morales-McDevitt, Maya Erin. “Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A.” 2017. Thesis, Texas A&M University. Accessed January 20, 2020. http://hdl.handle.net/1969.1/161637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Morales-McDevitt, Maya Erin. “Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A.” 2017. Web. 20 Jan 2020.

Vancouver:

Morales-McDevitt ME. Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1969.1/161637.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Morales-McDevitt ME. Enriched Mesocosm Experiments to Study the Production of Marine Oil Snow in the Presence of BP Surrogate Oil and Corexit 9500A. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161637

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

8. Watson, Eliza. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.

Degree: 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 (6^th Edition):

Watson, E. (2012). Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Watson, Eliza. “Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.” 2012. Thesis, Texas A&M University. Accessed January 20, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Watson, Eliza. “Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use.” 2012. Web. 20 Jan 2020.

Vancouver:

Watson E. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Watson E. Surface Water Chemistry in White Oak Creek, North-East Texas: Effect of Land Use. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10687

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

9. Cira, Emily. Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.

Degree: 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 (6^th Edition):

Cira, E. (2013). Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cira, Emily. “Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.” 2013. Thesis, Texas A&M University. Accessed January 20, 2020. http://hdl.handle.net/1969.1/151400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cira, Emily. “Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition.” 2013. Web. 20 Jan 2020.

Vancouver:

Cira E. Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1969.1/151400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cira E. Nutrient and Grazing Control of Estuarine Phytoplankton Growth and Community Composition. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

10. Graniero, Lauren E. Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.

Degree: 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 ?^18O (?w) and dissolved inorganic carbon (DIC) ?^13C needed to best test the fidelity of shell isotope values as environmental indicators. Previously measured seawater ?w and ?^13CDIC values collected biweekly from 2011-2012 allow us to determine if shell ?^18O and ?^13C values record temperature, ?w, ?^13CDIC, and ultimately nutrient status in tropical waters. Conus, Vasum, and Strombus shell ?^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 ?^13C profiles show cyclicity, but only Conus samples from Veracruz Beach (Pacific) record seasonal changes in ?13CDIC. This observation likely results from: (1) more distinct seasonal ?^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 ?^15N and ?^13C values. Bivalve ?^15N and ?^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 ?^15N and ?^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, ?^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 (6^th Edition):

Graniero, L. E. (2014). Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/154174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Graniero, Lauren E. “Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.” 2014. Thesis, Texas A&M University. Accessed January 20, 2020. http://hdl.handle.net/1969.1/154174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Graniero, Lauren E. “Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks.” 2014. Web. 20 Jan 2020.

Vancouver:

Graniero LE. Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1969.1/154174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Graniero LE. Modern Calibrations of Temperature and Nutrient Proxies for Paleoenvironmental Reconstructions in Tropical Mollusks. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/154174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. 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)

Subjects/Keywords: 579; geomicrobiology; proteomics; nutrients; ISS

11 more images…

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APA (6^th 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 (16^th Edition):

Bryce, Casey Catherine. “Microbial stress in rock habitats.” 2015. Doctoral Dissertation, University of Edinburgh. Accessed January 20, 2020. http://hdl.handle.net/1842/15776.

MLA Handbook (7^th Edition):

Bryce, Casey Catherine. “Microbial stress in rock habitats.” 2015. Web. 20 Jan 2020.

Vancouver:

Bryce CC. Microbial stress in rock habitats. [Internet] [Doctoral dissertation]. University of Edinburgh; 2015. [cited 2020 Jan 20]. 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

Baylor University

12. 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: 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)

Subjects/Keywords: Aquatic ecosystems.; Nutrients.; Aquatic toxicity.

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APA (6^th 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. (Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/8119

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th 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. Thesis, Baylor University. Accessed January 20, 2020. http://hdl.handle.net/2104/8119.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th 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. 20 Jan 2020.

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] [Thesis]. Baylor University; 2011. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/2104/8119.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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. [Thesis]. Baylor University; 2011. Available from: http://hdl.handle.net/2104/8119

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. 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 (6^th 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 (16^th Edition):

Kumar, Anil. “Phosphorus and rain harvested water economy through vesicular arbuscular mycorrhizae (VAM) in Okra-Pea sequence.” 2008. Thesis, INFLIBNET. Accessed January 20, 2020. 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 (7^th Edition):

Kumar, Anil. “Phosphorus and rain harvested water economy through vesicular arbuscular mycorrhizae (VAM) in Okra-Pea sequence.” 2008. Web. 20 Jan 2020.

Vancouver:

Kumar A. Phosphorus and rain harvested water economy through vesicular arbuscular mycorrhizae (VAM) in Okra-Pea sequence. [Internet] [Thesis]. INFLIBNET; 2008. [cited 2020 Jan 20]. 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

14. 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 (6^th 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 (16^th 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 20, 2020. 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 (7^th Edition):

Sepehya, Swapana. “Long-term effect of integrated nutrient management on dynamics of nitrogen, phosphorus and potassium in rice-wheat system.” 2007. Web. 20 Jan 2020.

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 2020 Jan 20]. 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

University of Bridgeport

15. 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)

Subjects/Keywords: Naturopathy; Gestational diabetes; Nutrients; Herbs

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APA (6^th 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 (16^th Edition):

Manning, Jasmine. “Gestational Diabetes and the Role of Specific Nutrients and Herbs .” 2014. Thesis, University of Bridgeport. Accessed January 20, 2020. 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 (7^th Edition):

Manning, Jasmine. “Gestational Diabetes and the Role of Specific Nutrients and Herbs .” 2014. Web. 20 Jan 2020.

Vancouver:

Manning J. Gestational Diabetes and the Role of Specific Nutrients and Herbs . [Internet] [Thesis]. University of Bridgeport; 2014. [cited 2020 Jan 20]. 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

University of Zambia

16. 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 (6^th 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 (16^th 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 20, 2020. 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 (7^th Edition):

Shanungu, Griffin Kaize. “Impacts of Shrub enctoachment on soil nutrient properties, plant diversity and herbivory in Lochinvar National Park, Zambia .” 2014. Web. 20 Jan 2020.

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 2020 Jan 20]. 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

Louisiana State University

17. 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)

Subjects/Keywords: wetland ecology; wildlife; wetlands; nutrients

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APA (6^th 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 (16^th 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 20, 2020. etd-06102014-192930 ; https://digitalcommons.lsu.edu/gradschool_theses/3020.

MLA Handbook (7^th Edition):

Ialeggio, James Stephen. “Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation.” 2013. Web. 20 Jan 2020.

Vancouver:

Ialeggio JS. Some Effects of Nutrient and Flooding Stress Manipulation on Coastal Louisiana Wetland Vegetation. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2020 Jan 20]. 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

18. 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 (6^th 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 (16^th 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 20, 2020. http://hdl.handle.net/10179/2452.

MLA Handbook (7^th 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. 20 Jan 2020.

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 2020 Jan 20]. 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

Montana State University

19. Kaya, Eylul. Zinc efficiency and diversity of Montana wheat and barley.

Degree: College of Agriculture, 2017, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/15328

► Zn is essential for all living organisms because of its functional, structural and regulatory roles in more than 300 enzymes found in eukaryotes (McCall, 2000).… (more)

Subjects/Keywords: Wheat.; Barley.; Plant nutrients.; Zinc.

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APA (6^th Edition):

Kaya, E. (2017). Zinc efficiency and diversity of Montana wheat and barley. (Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/15328

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kaya, Eylul. “Zinc efficiency and diversity of Montana wheat and barley.” 2017. Thesis, Montana State University. Accessed January 20, 2020. https://scholarworks.montana.edu/xmlui/handle/1/15328.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kaya, Eylul. “Zinc efficiency and diversity of Montana wheat and barley.” 2017. Web. 20 Jan 2020.

Vancouver:

Kaya E. Zinc efficiency and diversity of Montana wheat and barley. [Internet] [Thesis]. Montana State University; 2017. [cited 2020 Jan 20]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/15328.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kaya E. Zinc efficiency and diversity of Montana wheat and barley. [Thesis]. Montana State University; 2017. Available from: https://scholarworks.montana.edu/xmlui/handle/1/15328

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arkansas

20. 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 (6^th 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 (16^th 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 20, 2020. https://scholarworks.uark.edu/etd/3030.

MLA Handbook (7^th Edition):

Rollans, Justin Ray. “Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed.” 2018. Web. 20 Jan 2020.

Vancouver:

Rollans JR. Decadal Land Surface Phenology and Water Quality in the Headwaters Illinois River Watershed. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2020 Jan 20]. 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

21. 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)

Subjects/Keywords: mesocosms; pharmaceuticals; wastewater; nutrients

11 more images…

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APA (6^th 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 (16^th Edition):

Cardinal, Pascal. “Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms.” 2013. Masters Thesis, University of Manitoba. Accessed January 20, 2020. http://hdl.handle.net/1993/17600.

MLA Handbook (7^th Edition):

Cardinal, Pascal. “Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms.” 2013. Web. 20 Jan 2020.

Vancouver:

Cardinal P. Assessing nutrient and pharmaceutical removal efficiency from wastewater using shallow wetland treatment mesocosms. [Internet] [Masters thesis]. University of Manitoba; 2013. [cited 2020 Jan 20]. 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

Cornell University

22. Royem, Anna. Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils .

Degree: 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)

Subjects/Keywords: Macropores; phosphorus; Agricultural Nutrients

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APA (6^th Edition):

Royem, A. (2012). Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/29184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Royem, Anna. “Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils .” 2012. Thesis, Cornell University. Accessed January 20, 2020. http://hdl.handle.net/1813/29184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Royem, Anna. “Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils .” 2012. Web. 20 Jan 2020.

Vancouver:

Royem A. Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils . [Internet] [Thesis]. Cornell University; 2012. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/1813/29184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Royem A. Fate And Transport Of Agricultural Nutrients In Macro-Porous Soils . [Thesis]. Cornell University; 2012. Available from: http://hdl.handle.net/1813/29184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Utah State University

23. 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, ;.

Subjects/Keywords: Modeling; Nutrients; QUAK2Kw; Environmental Engineering

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APA (6^th 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 (16^th 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 20, 2020. https://digitalcommons.usu.edu/etd/1511.

MLA Handbook (7^th Edition):

Hobson, Andrew J. “Using QUAL2Kw as a Decision Support Tool: Considerations for Data Collection, Calibration, and Numeric Nutrient Criteria.” 2013. Web. 20 Jan 2020.

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 2020 Jan 20]. 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

Colorado State University

24. Beck, Whitney Shannon. INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS.

Degree: PhD, Ecology (Graduate Degree Program), 2019, Colorado State University

URL: http://hdl.handle.net/10217/195288

► Benthic (streambed) algae serve many critical ecological functions in freshwater stream ecosystems, including primary production, nitrogen (N) and phosphorus (P) cycling, and habitat provision for… (more)

▼ Benthic (streambed) algae serve many critical ecological functions in freshwater stream ecosystems, including primary production, nitrogen (N) and phosphorus (P) cycling, and habitat provision for macroinvertebrates. Over the past several decades, N and P concentrations have increased in freshwater systems and estuaries because of human sources like wastewater treatment plant discharges, agricultural fertilizer runoff, urban stormwater runoff, and atmospheric deposition. Additions of these limiting nutrients can dramatically increase algal biomass accrual, causing negative ecosystem-level consequences such as proliferation of nuisance algae and depletion of dissolved oxygen, leading to economic costs conservatively estimated at $2.2 billion per year. In aquatic ecology studies, algal production and biomass have been shown to respond to nutrient additions in a context-specific manner that depends on experimental methods and environmental conditions. In this dissertation, I investigate these sources of experimental and environmental variability using three approaches: a meta-analysis, methods comparison, and multi-factor experiments. The meta-analysis focuses on experimental, environmental, and geographic factors that influence algal nutrient limitation, whereas the methods comparison identifies experimental design choices that could confound nutrient limitation results. The multi-factor experiments focus on environmental factors including herbivory, temperature, and background nutrients that mediate algal responses to nutrient additions under field conditions. While uncertainty can never be completely removed from ecological experiments, my research highlights how we can better account for that uncertainty and identify the appropriate scope of inference for individual nutrient addition experiments. Ultimately, this knowledge will contribute to the ability of researchers and managers to more effectively predict and prevent ecological and human health effects of stream eutrophication. In Chapter 1, I conducted a systematic literature review and meta-analysis of nutrient diffusing substrate (NDS) experiments in freshwater stream and river ecosystems. My objectives were to calculate overall effects of N, P, and N+P additions on algal biomass, while also developing meta-analysis models to determine how experimental (e.g., nutrient concentrations), environmental (e.g., riparian canopy cover, temperature), and geographic factors (e.g., stream order, ecoregion) influence algal responses to nutrients. I extracted results from 649 experiments and found that experimental variables including substrate type, chemical concentration, and experimental length significantly affected P and N+P effect sizes, while NDS chemical compound influenced N, P, and N+P effect sizes. Environmental variables such as in-stream nutrients and riparian canopy cover significantly affected limitation by N, P, and N+P. Temperature, stream discharge, and stream velocity only affected limitation by N+P. Land use, ecoregion, and season showed clear… Advisors/Committee Members: Poff, N. LeRoy (advisor), Hall, Ed (committee member), Spaulding, Sarah (committee member), Hoeting, Jennifer (committee member).

Subjects/Keywords: Freshwater; Periphyton; Nutrients; Algae

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APA (6^th Edition):

Beck, W. S. (2019). INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS. (Doctoral Dissertation). Colorado State University. Retrieved from http://hdl.handle.net/10217/195288

Chicago Manual of Style (16^th Edition):

Beck, Whitney Shannon. “INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS.” 2019. Doctoral Dissertation, Colorado State University. Accessed January 20, 2020. http://hdl.handle.net/10217/195288.

MLA Handbook (7^th Edition):

Beck, Whitney Shannon. “INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS.” 2019. Web. 20 Jan 2020.

Vancouver:

Beck WS. INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS. [Internet] [Doctoral dissertation]. Colorado State University; 2019. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/10217/195288.

Council of Science Editors:

Beck WS. INVESTIGATING EXPERIMENTAL AND ENVIRONMENTAL FACTORS TO PROVIDE A MECHANISTIC UNDERSTANDING OF BENTHIC ALGAL BIOMASS ACCUMULATION IN FRESHWATER STREAMS. [Doctoral Dissertation]. Colorado State University; 2019. Available from: http://hdl.handle.net/10217/195288

University of Waterloo

25. 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 (6^th 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 (16^th 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 20, 2020. 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 (7^th Edition):

Van Meter, Kimberly. “The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls.” 2016. Web. 20 Jan 2020.

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 2020 Jan 20]. 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

Victoria University of Wellington

26. 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 (6^th 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 (16^th 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 20, 2020. http://hdl.handle.net/10063/2022.

MLA Handbook (7^th 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. 20 Jan 2020.

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 2020 Jan 20]. 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

University of Manitoba

27. 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 (6^th 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 (16^th 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 20, 2020. http://hdl.handle.net/1993/4207.

MLA Handbook (7^th Edition):

Hertam, Susan. “The effects of Common Carp (Cyprinus carpio L.) on water quality, algae and submerged vegetation in Delta Marsh, Manitoba.” 2010. Web. 20 Jan 2020.

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 2020 Jan 20]. 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 Miami

28. 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 (6^th 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 (16^th Edition):

Zamora, Lauren M. “Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic.” 2010. Doctoral Dissertation, University of Miami. Accessed January 20, 2020. https://scholarlyrepository.miami.edu/oa_dissertations/477.

MLA Handbook (7^th Edition):

Zamora, Lauren M. “Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic.” 2010. Web. 20 Jan 2020.

Vancouver:

Zamora LM. Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic. [Internet] [Doctoral dissertation]. University of Miami; 2010. [cited 2020 Jan 20]. 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

University of Sydney

29. Grech, Amanda. The Australian population’s diet and the obesity epidemic .

Degree: 2018, University of Sydney

URL: http://hdl.handle.net/2123/20432

► Over the past four decades, there has been an unprecedented increase in the prevalence of overweight and obesity, contributing to the burden of chronic disease.… (more)

Subjects/Keywords: diet; nutrition; obesity; overweight; nutrients

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Grech, A. (2018). The Australian population’s diet and the obesity epidemic . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/20432

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Grech, Amanda. “The Australian population’s diet and the obesity epidemic .” 2018. Thesis, University of Sydney. Accessed January 20, 2020. http://hdl.handle.net/2123/20432.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Grech, Amanda. “The Australian population’s diet and the obesity epidemic .” 2018. Web. 20 Jan 2020.

Vancouver:

Grech A. The Australian population’s diet and the obesity epidemic . [Internet] [Thesis]. University of Sydney; 2018. [cited 2020 Jan 20]. Available from: http://hdl.handle.net/2123/20432.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Grech A. The Australian population’s diet and the obesity epidemic . [Thesis]. University of Sydney; 2018. Available from: http://hdl.handle.net/2123/20432

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo

30. 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 Manager

APA (6^th 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 (16^th Edition):

Werenka, Alexander. “Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement.” 2019. Thesis, University of Waterloo. Accessed January 20, 2020. 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 (7^th Edition):

Werenka, Alexander. “Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement.” 2019. Web. 20 Jan 2020.

Vancouver:

Werenka A. Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2020 Jan 20]. 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

Open Access Theses and Dissertations