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University of Nairobi
1.
Wanyonyi, Stellah N.
Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
.
Degree: 2016, University of Nairobi
URL: http://hdl.handle.net/11295/99679 
► Papyrus swamps are found patchily around the shores of Lake Victoria mainly along river inflows. Elsewhere, this habitat is widely scattered with notable patches at…
(more)
▼ Papyrus swamps are found patchily around the shores of Lake Victoria mainly along river inflows. Elsewhere, this habitat is widely scattered with notable patches at Lake Naivasha and Lake Jipe. Sio Port is one of Lake Victoria’s Cyperus papyrus swamp located at the mouth of River Sio, North of Lake Victoria on the border of Kenya with Uganda. It is an important bird area of Kenya supporting a wide range of birds; however, this swamp lacks formal protection. The swamp and its immediate surrounding have been encroached by forms of disturbances caused by human activities. This study investigated the different forms of habitat disturbance and their effect on the distribution and abundance of papyrus endemic birds. Data on bird counts, habitat quality and forms of disturbance were collected for a period of six months, in October 2013 to March 2014. Total bird counts were established using Timed Species Count (TSC) and playback call technique, done at every fixed point. The points were 50 m apart alternating left and right. At every fixed point count, the researcher waited for 1 minute, calls of the study species were played to elicit response of the secretive papyrus endemic birds; the number of birds of each species seen or heard only within a radius of 25 meters was recorded for the next 9 minutes before moving to the next point count. Habitat quality (height, density and level of maturity) was determined in 1 m2 plots along transverse transects. Opportunistic observations were made to establish forms of disturbance present during vegetation and bird surveys. Papyrus endemic birds were highly distributed in sites with pure papyrus (55.58%) than in sites with mixed vegetation (44.42%). The abundance of three out of the four endemic birds White-winged Swamp-warbler (F (1, 28) =7.376 p = 0.011), Papyrus Gonolek (F (1, 28) = 5.331, p = 0.029), and Northern Brown throated Weaver (F (1, 28) = 5.734, p = 0.024) was significantly different in mixed and pure papyrus sites. However, the abundance of Greater Swamp-warbler (F (1, 28) =2.718, p = 0.110) were not significantly different in mixed and pure papyrus sites in Sio Port swamp in the study period. Forms of habitat disturbance established were vegetation clearing and invasion by terrestrial and aquatic plants. 76.47% of papyrus vegetation were young and regenerating (0-2 m high), 19.65% were immature papyruses (2-4 m) whereas 3.88% were tall mature papyruses (4-6 m high). Abundance of papyrus endemic birds was negatively correlated with density of vegetation in the height range of 0-2 m (r = -0.018, p = 0.941) and 2-4 m (r = -0.054, p = 0.822), the correlation was not significant. Abundance of papyrus endemic birds was positively and significantly correlated with density of vegetation in the height range of 4-6 m (r = 0.465, p = 0.039), the correlation was significant. Regression equation produced by the relationship was y = 2.590x + 0.465, t = 2.227, p = 0.039. Thus, any change in papyrus density resulted to a change in the abundance of papyrus endemic birds. High level of…
Subjects/Keywords: Habitat Disturbance
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APA (6th Edition):
Wanyonyi, S. N. (2016). Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
. (Thesis). University of Nairobi. Retrieved from http://hdl.handle.net/11295/99679
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wanyonyi, Stellah N. “Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
.” 2016. Thesis, University of Nairobi. Accessed January 24, 2021.
http://hdl.handle.net/11295/99679.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wanyonyi, Stellah N. “Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
.” 2016. Web. 24 Jan 2021.
Vancouver:
Wanyonyi SN. Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
. [Internet] [Thesis]. University of Nairobi; 2016. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/11295/99679.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wanyonyi SN. Effects of Habitat Disturbance on Distribution and Abundance of Papyrus Endemic Birds in Sio Port Swamp, Western Kenya
. [Thesis]. University of Nairobi; 2016. Available from: http://hdl.handle.net/11295/99679
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
2.
McMullen, Laura E.
Ecological responses to riverine floods and flow alteration.
Degree: PhD, Zoology, 2011, Oregon State University
URL: http://hdl.handle.net/1957/22831
► Floods are major disturbance events for riverine ecosystems, directly and indirectly impacting organisms and their habitat. In this study I investigated the role of riverine…
(more)
▼ Floods are major
disturbance events for riverine ecosystems, directly and indirectly impacting organisms and their habitat. In this study I investigated the role of riverine floods and flow alteration in regulating aquatic macroinvertebrate population and community structure. I examined this problem using a variety of methods: a meta-analytic review of primary studies from the literature, a mathematical model synthesizing population and flood ecology, a multi-year experimental flood program in an arid-land river, and a field investigation of flood recovery behaviors in a charismatic larval odonate. I found that floods significantly reduced invertebrate abundance in the short term, but had varied effects across particular study sites, microhabitats, and taxonomic groups. I determined that both resistant and resilient capabilities are important to persistence of invertebrate populations after
disturbance events, and that these traits may act in a binary fashion. Recovery over time of invertebrate populations may be partially due to "hidden resistance" of spatially displaced individuals in side-channels, benthic substrate, and vegetation or wood. Some invertebrates adapted to flood-prone rivers may possess behavioral adaptations for returning to the main-channel of the river after flood events. This dissertation contributes to riverine
disturbance ecology and provides information useful to prediction and management of ecosystem flows in rivers.
Advisors/Committee Members: Lytle, David A. (advisor), Tullos, Desiree (committee member).
Subjects/Keywords: disturbance ecology
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APA (6th Edition):
McMullen, L. E. (2011). Ecological responses to riverine floods and flow alteration. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/22831
Chicago Manual of Style (16th Edition):
McMullen, Laura E. “Ecological responses to riverine floods and flow alteration.” 2011. Doctoral Dissertation, Oregon State University. Accessed January 24, 2021.
http://hdl.handle.net/1957/22831.
MLA Handbook (7th Edition):
McMullen, Laura E. “Ecological responses to riverine floods and flow alteration.” 2011. Web. 24 Jan 2021.
Vancouver:
McMullen LE. Ecological responses to riverine floods and flow alteration. [Internet] [Doctoral dissertation]. Oregon State University; 2011. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/1957/22831.
Council of Science Editors:
McMullen LE. Ecological responses to riverine floods and flow alteration. [Doctoral Dissertation]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/22831
3.
Hay, Michael L.
Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin.
Degree: 2013, University of Nevada – Reno
URL: http://hdl.handle.net/11714/3172
► A new zone was created for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for vegetation simulations in the hydrologic Great Basin. Current…
(more)
▼ A new zone was created for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for vegetation simulations in the hydrologic Great Basin. Current parameterization is designed to use LANDFIRE data as input. Three separate mountain areas were considered for this study: the Clover Mtns., the Sheep Range, and the Snake Range. Fire histories for each area were based on an eleven year period (1986-1996), and were acquired from the National Fire Occurrence database. Ten-year calibration simulations were performed for each mountain area using 1999 vegetation data to initialize the run. Vegetation data from 2008 was used to assess the simulated end states. Model pathways were adapted to the Great Basin ecosystems, successional stages,
disturbance processes, and ecoclimatic features. The model performed well at predicting vegetation type, but was inconsistent predicting canopy cover density and canopy height.
Advisors/Committee Members: Biondi, Franco (advisor), Chew, Jim (committee member), Tausch, Robin (committee member).
Subjects/Keywords: Disturbance model; Vegetation
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APA (6th Edition):
Hay, M. L. (2013). Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/3172
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hay, Michael L. “Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin.” 2013. Thesis, University of Nevada – Reno. Accessed January 24, 2021.
http://hdl.handle.net/11714/3172.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hay, Michael L. “Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin.” 2013. Web. 24 Jan 2021.
Vancouver:
Hay ML. Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin. [Internet] [Thesis]. University of Nevada – Reno; 2013. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/11714/3172.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hay ML. Calibration of a new zone for the SIMulating Patterns and Processes at Landscape scaLEs (SIMPPLLE) model for the Great Basin. [Thesis]. University of Nevada – Reno; 2013. Available from: http://hdl.handle.net/11714/3172
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
4.
Anoszko, Elias.
Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness.
Degree: PhD, Natural Resources Science and Management, 2018, University of Minnesota
URL: http://hdl.handle.net/11299/195399
► Under a warming climate, the Boundary Waters Canoe Area Wilderness (BWCAW) of Northern MN is expected to see an increase in the frequency of disturbances…
(more)
▼ Under a warming climate, the Boundary Waters Canoe Area Wilderness (BWCAW) of Northern MN is expected to see an increase in the frequency of disturbances including wildfires and severe windstorms. While boreal forests such as those of the BWCAW are generally considered disturbance adapted, it is uncertain how changing disturbance regimes will impact these forests. We used a series of recent disturbances in the BWCAW ranging from areas affected by wind or fire only, to areas affected by wind followed by fire, or multiple fires, to examine how predicted changes in boreal disturbance regimes are likely to impact these forests. We found that multiple disturbances typically had greater cumulative disturbance severity than single disturbance events and in the case of wind+fire combinations also tended to burn with greater intensity, and fire severity relative to areas affected by a single fire only. While diversity-severity relationships varied in shape, we found that diversity was generally lower at high disturbance severity relative to moderate severities. Multiple disturbances had modestly reduced diversity relative to single disturbances, but this relationship varied depending on the spatial scale of inquiry. Despite only modest impacts on diversity, multiple disturbances did have a pronounced impact on succession and composition. Regardless of pre-disturbance composition, multiple disturbances resulted in succession to aspen and paper birch, with birch being more dominant in areas burned in late season fires and aspen more dominant in areas burned by early season fires. Stands subjected to single disturbance events exhibited multiple successional pathways and mix of forest types. Our results suggest that predicted changes in boreal disturbance regimes are likely to have minor impacts on woody plant diversity, but could adversely affect disturbance adverse species, and alter the age structure and composition of forests by reducing long-lived boreal conifers and increasing the dominance of aspen and paper birch.
Subjects/Keywords: disturbance; fire disturbance; fire ecology; multiple disturbances; succession; wind disturbance
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APA ·
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APA (6th Edition):
Anoszko, E. (2018). Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/195399
Chicago Manual of Style (16th Edition):
Anoszko, Elias. “Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness.” 2018. Doctoral Dissertation, University of Minnesota. Accessed January 24, 2021.
http://hdl.handle.net/11299/195399.
MLA Handbook (7th Edition):
Anoszko, Elias. “Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness.” 2018. Web. 24 Jan 2021.
Vancouver:
Anoszko E. Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness. [Internet] [Doctoral dissertation]. University of Minnesota; 2018. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/11299/195399.
Council of Science Editors:
Anoszko E. Impacts of multiple fires and wind disturbance on forest community composition, succession and diversity in the Boundary Waters Canoe Area Wilderness. [Doctoral Dissertation]. University of Minnesota; 2018. Available from: http://hdl.handle.net/11299/195399
Royal Roads University
5.
Penno, Jessica.
Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
.
Degree: 2016, Royal Roads University
URL: http://hdl.handle.net/10170/868
► The purpose of this thesis is to inform a biomonitoring study in Banff National Park, Alberta, that will use benthic macroinvertebrates as a biological indicator…
(more)
▼ The purpose of this thesis is to inform a biomonitoring study in Banff National Park, Alberta, that will use benthic macroinvertebrates as a biological indicator of aquatic ecosystem condition in response to the re-introduction of bison. To inform the biomonitoring program, macroinvertebrate metrics were evaluated for biological relevance to the study design. Existing data from a surrogate flooding
disturbance in Banff National Park was used to evaluate the effects of different sampling scenarios on the power to detect effects from a bison reintroduction and prescribed burn program. Power analysis highlighted that four metrics would provide >80% chance to detect an effect within two to five years of the beginning of the monitoring program. The metrics were richness, true diversity, % shredders and % shredders all of which have both biological importance to the productivity of fishery resources and are easily communicated to the general public.
Advisors/Committee Members: Taylor, Mark (advisor).
Subjects/Keywords: benthic macroinvertebrates;
biomonitoring;
disturbance;
power
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APA (6th Edition):
Penno, J. (2016). Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
. (Thesis). Royal Roads University. Retrieved from http://hdl.handle.net/10170/868
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Penno, Jessica. “Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
.” 2016. Thesis, Royal Roads University. Accessed January 24, 2021.
http://hdl.handle.net/10170/868.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Penno, Jessica. “Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
.” 2016. Web. 24 Jan 2021.
Vancouver:
Penno J. Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
. [Internet] [Thesis]. Royal Roads University; 2016. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10170/868.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Penno J. Metric and power analysis for a biomonitoring program in Banff National Park, Alberta
. [Thesis]. Royal Roads University; 2016. Available from: http://hdl.handle.net/10170/868
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Tasmania
6.
Holderness-Roddam, B.
The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment.
Degree: 2011, University of Tasmania
URL: https://eprints.utas.edu.au/12310/2/whole.pdf
► This study assesses the impact of domestic dogs on the natural environment. The principal issue investigated is that of disturbance and the consequences for native…
(more)
▼ This study assesses the impact of domestic dogs on the natural environment. The principal issue investigated is that of disturbance and the consequences for native wildlife, particularly vertebrate species. In addition to the catastrophic effects of killing, maiming and orphaning of wildlife; disturbance can contribute to energetic loss through premature flight or reduced feed intake and reproductive disruption due to nest disturbance. Dogs have been implicated in disease transmission to native wildlife; with faecal contamination of waterways having potential negative affects for marine mammal health. Hybridisation with other canid species is also an issue of concern, as is expropriation of land for the production of food for pet dogs.
The study commences with an overview of ecological disturbance. The literature review then assesses the role of domestic dogs in ecological disturbance, public attitudes towards compliance with dog management legislation and the remediation and mitigation of disturbance by dogs.
Data obtained from the Resource Management and Conservation section of the Tasmanian Department of Department of Primary Industries, Parks, Water and Environment regarding native wildlife presenting for care was analysed in order to determine the principal reported causes of death and injury to native wildlife in Tasmania. These results were then compared with data from the Australian Wildlife Health Centre - Wildlife Hospital at Healesville Sanctuary in Victoria and the data submitted by Tasmanian veterinarians through a three month diary of wildlife presentations recorded by ten practices.
The data is indicative of domestic dogs having a more deleterious effect than domestic cats on native wildlife in Tasmania; particularly in urban and suburban areas and on beaches.
Subjects/Keywords: domestic dogs; disturbance; environment; wildlife
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APA (6th Edition):
Holderness-Roddam, B. (2011). The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/12310/2/whole.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Holderness-Roddam, B. “The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment.” 2011. Thesis, University of Tasmania. Accessed January 24, 2021.
https://eprints.utas.edu.au/12310/2/whole.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Holderness-Roddam, B. “The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment.” 2011. Web. 24 Jan 2021.
Vancouver:
Holderness-Roddam B. The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment. [Internet] [Thesis]. University of Tasmania; 2011. [cited 2021 Jan 24].
Available from: https://eprints.utas.edu.au/12310/2/whole.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Holderness-Roddam B. The effects of domestic dogs (Canis familiaris) as a disturbance agent on the natural environment. [Thesis]. University of Tasmania; 2011. Available from: https://eprints.utas.edu.au/12310/2/whole.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
7.
Van Diggelen, Amanda.
Is Salinity Variability a Benthic Disturbance?.
Degree: MS, Marine Biology, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/152864
► Estuaries are subjected to variable salinity regimes governed by variable freshwater inflow and tidal regimes. Estuaries are less saline near the river (source of fresh…
(more)
▼ Estuaries are subjected to variable salinity regimes governed by variable
freshwater inflow and tidal regimes. Estuaries are less saline near the river (source of
fresh water); salinities increase towards the inlet of the adjacent sea or ocean. Freshwater
inflow is a driver to the functioning of estuaries, and average salinity is usually measured
to identify the effects of inflow. However, salinity variability could act as a
disturbance
by producing unstable habitats. The purpose of this research was to determine if salinity
variance is an indicator of benthic
disturbance, and therefore a driver of community
stability. The macrofauna communities of the five most southern estuaries on the Texas
coastline were analyzed using a long-term data set. The estuaries lie in a climatic
gradient and have different long-term salinity dynamics, thus salinity variance within and
between estuaries can be compared. Benthic diversity, evenness, and richness (i.e., total
number of species) were calculated and compared to salinity average and salinity
variance to determine the efficacy of each diversity measure for determining community
changes within and between estuarine systems. Salinity variance, rather than salinity
average, was found to be more correlated to benthic diversity for each estuarine system.
Freshwater inflow acts as a benthic
disturbance both within and between estuaries. As
salinity variance decreased (i.e. reduced freshwater inflow) diversity levels of benthic
communities increased, while areas with more freshwater inflow displayed lower levels
of benthic diversity. These findings advance a general theory of diversity maintenance.
When communities are not influenced by persistent stressors, such as salinity variance,
multiple stages of succession may occur with more species available to occupy the
resulting open niches, thereby increasing diversity.
Advisors/Committee Members: Montagna, Paul (advisor), Withers, Kimberly (committee member), Pollack, Jennifer (committee member).
Subjects/Keywords: community stability; freshwater inflow; disturbance
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APA ·
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APA (6th Edition):
Van Diggelen, A. (2014). Is Salinity Variability a Benthic Disturbance?. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152864
Chicago Manual of Style (16th Edition):
Van Diggelen, Amanda. “Is Salinity Variability a Benthic Disturbance?.” 2014. Masters Thesis, Texas A&M University. Accessed January 24, 2021.
http://hdl.handle.net/1969.1/152864.
MLA Handbook (7th Edition):
Van Diggelen, Amanda. “Is Salinity Variability a Benthic Disturbance?.” 2014. Web. 24 Jan 2021.
Vancouver:
Van Diggelen A. Is Salinity Variability a Benthic Disturbance?. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/1969.1/152864.
Council of Science Editors:
Van Diggelen A. Is Salinity Variability a Benthic Disturbance?. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152864
University of Waikato
8.
de Groot, Neeltje, P.H.M.
The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
.
Degree: 2014, University of Waikato
URL: http://hdl.handle.net/10289/8648
► The grounding of the MV Rena on October 5th, 2011 caused 350-400 tons of heavy fuel oil to spill into the ocean. A significant portion…
(more)
▼ The grounding of the MV Rena on October 5th, 2011 caused 350-400 tons of heavy fuel oil to spill into the ocean. A significant portion of the oil reached the Bay of Plenty coastline six days later. This thesis investigated the effectiveness of oil clean-up operations that involved spill response crew and some eight thousand volunteers. Previous oil spill studies discussed in literature, have established that spilled oil can mix with sediment beneath the beach surface. 26 Sediment cores averaging ~80cm in length were retrieved ~one year after the Rena oil spill at 12 locations between Waihi and Maketu and were chemically analysed to a depth of 40 cm (0-20 cm and 20-40 cm). GC/MS quantitative results concluded that polycyclic aromatic hydrocarbons (PAHs) were present in the sediment. However, only 7 of the 52 samples contained 4 of the 5 fingerprinted PAHs; phenanthrene, pyrene, benzo(a)anthracene and chrysene, that characterise the Rena oil, with naphthalene undetected in all of the 52 samples. Naphthalene degrades quickly due to its low molecular weight and commonly evaporates from the marine environment within the first few weeks of exposure. Therefore, the absence of naphthalene was anticipated. Variations of phenanthrene and pyrene were detected 27 other sediment samples at low, mid and high tide locations, in both surface 0-20 cm samples and the deeper 20-40 cm samples. Due to the absence of the most resilient PAHs benzo(a)anthracene and chrysene in the 27 samples characterise Rena oil, is likely that phenanthrene and pyrene have come from other hydrocarbon sources such as stormwater outfalls. Laboratory settling flask experiments demonstrated that heavy fuel oil formed droplets and would bind to sediment of both siliciclastic and bioclastic origin. Oil droplets would sink, float or stay suspended in the water column due to oil droplet density variations. Oil that bound to sand grains tended to sink and join the bottom sediments, and oil droplets that contained bubbles of water or air tended to float to the surface of the water column. Storms that occurred in the weeks after the initial Rena spill hindered oil clean-up operations and increased wave activity which potentially enabled oil to mix further into coastal sediments. The maximum depth of
disturbance was recorded at Pukehina Beach at 28 cm during storm conditions which established that chemical analysis to a depth of 40 cm encompassed the maximum depth that oil could be mixed into the beach sediment in the intertidal zone. This study has set the foundations on understanding the geotechnical effects of spilled oil and coastal sediment interactions in the Bay of Plenty. The region would benefit from further depth of
disturbance studies to assist in more efficient remediation of possible oil spills in the future.
Advisors/Committee Members: de Lange, Willem P (advisor), Moon, Vicki G (advisor).
Subjects/Keywords: PAHs;
depth of disturbance;
Rena
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APA ·
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APA (6th Edition):
de Groot, Neeltje, P. H. M. (2014). The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/8648
Chicago Manual of Style (16th Edition):
de Groot, Neeltje, P H M. “The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
.” 2014. Masters Thesis, University of Waikato. Accessed January 24, 2021.
http://hdl.handle.net/10289/8648.
MLA Handbook (7th Edition):
de Groot, Neeltje, P H M. “The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
.” 2014. Web. 24 Jan 2021.
Vancouver:
de Groot, Neeltje PHM. The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
. [Internet] [Masters thesis]. University of Waikato; 2014. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10289/8648.
Council of Science Editors:
de Groot, Neeltje PHM. The extent of burial of the Rena Oil Spill within Bay of Plenty coastal sediments
. [Masters Thesis]. University of Waikato; 2014. Available from: http://hdl.handle.net/10289/8648
Colorado State University
9.
Perovich, Carlyn.
Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The.
Degree: MS(M.S.), Ecology, 2014, Colorado State University
URL: http://hdl.handle.net/10217/84134
► Mountain pine beetle (Dendroctonus ponderosae; MPB) outbreaks are naturally occurring ecological disturbances in western North America, but the last two decades have seen eruptions of…
(more)
▼ Mountain pine beetle (Dendroctonus ponderosae; MPB) outbreaks are naturally occurring ecological disturbances in western North America, but the last two decades have seen eruptions of unprecedented severity and extent. These outbreaks have created novel conditions in lodgepole pine forests that have historically had
disturbance regimes dominated by large, stand-replacing fires. Previous research has found that MPB outbreaks increase relative abundance of non-host species. I use the lodgepole pine forest on the west side of Rocky Mountain National Park to examine mechanisms in this predicted forest change and the ecological legacy of the mountain pine beetle outbreak, particularly in terms of its implications for future disturbances. The recent mountain pine beetle outbreak increased spatial heterogeneity of species composition as a result of spatial variability in mechanisms of post-outbreak forest composition. Post-outbreak variances of up to 5 times greater and patch sizes up to 7 times smaller than pre-outbreak conditions. The increase in species heterogeneity will inhibit future landscape-level bark beetle outbreaks, though projected increases in Engelmann spruce and subalpine fir may make post-MPB forests more susceptible to other disturbances, including drought and fire. The MPB outbreak has increased landscape asynchrony, which will increase resiliency to future disturbances. However, this heterogeneity is a result of more spruce and fir on the landscape, species which are less adapted to projected future climate conditions.
Advisors/Committee Members: Sibold, Jason (advisor), Hobbs, N. Thompson (committee member), Jacobi, William R. (committee member).
Subjects/Keywords: bark beetles; regeneration; forest; disturbance
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APA (6th Edition):
Perovich, C. (2014). Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/84134
Chicago Manual of Style (16th Edition):
Perovich, Carlyn. “Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The.” 2014. Masters Thesis, Colorado State University. Accessed January 24, 2021.
http://hdl.handle.net/10217/84134.
MLA Handbook (7th Edition):
Perovich, Carlyn. “Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The.” 2014. Web. 24 Jan 2021.
Vancouver:
Perovich C. Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The. [Internet] [Masters thesis]. Colorado State University; 2014. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10217/84134.
Council of Science Editors:
Perovich C. Ecological legacy of the mountain pine beetle in the southern Rockies: forest change and disturbance interactions, The. [Masters Thesis]. Colorado State University; 2014. Available from: http://hdl.handle.net/10217/84134
University of Illinois – Chicago
10.
Weisling, Nina F.
Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance.
Degree: 2013, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/9799
► This study describes the classroom practices of middle school general education teachers working with students with and without emotional disturbance (ED), including the predictability of…
(more)
▼ This study describes the classroom practices of middle school general education teachers working with students with and without emotional
disturbance (ED), including the predictability of those teacher behaviors for both groups of students. The data collected in this study describe the ways in which the beliefs and experiences of this group of teachers aligns with their observed behaviors when working with students with and without ED.
Seven seventh and eighth grade literacy, math, and social science general education teachers, and 14 seventh and eighth grade students with and without ED participated in this study. Teachers’ instructional and classroom management interactions with target students was coded across 600 minutes of systematic, direct observation. Descriptive statistics were calculated for each teacher, specific to the target students. Additionally, lag sequential analysis was run to identify conditional probabilities for specific teacher and student behaviors. Teachers also completed a single Likert survey about their beliefs when working with students with ED. Data from surveys and observations describe the ways in which teachers' beliefs and experiences align to their classroom behaviors.
The results of this study show similar rates of opportunities to respond and use of instructional groupings, as well as low levels of teacher responses, for students with and without ED. Where teacher behavior are different for both groups of student—including rates of praise, use of corrective actions, and predictability of feedback—the patterns that emerge are mostly consistent with existing research: teachers used low levels of praise, are more likely to have negative interactions with students with ED, and have unpredictable feedback for students (Van Acker, Grant, & Henry, 1996; Wehby, Symons, & Shores, 1995). The data collected and analyzed in this study suggest that, for all students, what has proven successful in general education classrooms is not being effectively implemented. Implications for teacher practices and future research are also explored.
Advisors/Committee Members: Cushing, Lisa (advisor), Parker-Katz, Michelle B. (committee member), Tejero-Hughes, Marie (committee member), Talbott, Elizabeth (committee member), Shernoff, Elisa (committee member).
Subjects/Keywords: emotional disturbance; teacher practices
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APA (6th Edition):
Weisling, N. F. (2013). Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/9799
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Weisling, Nina F. “Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance.” 2013. Thesis, University of Illinois – Chicago. Accessed January 24, 2021.
http://hdl.handle.net/10027/9799.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Weisling, Nina F. “Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance.” 2013. Web. 24 Jan 2021.
Vancouver:
Weisling NF. Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance. [Internet] [Thesis]. University of Illinois – Chicago; 2013. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10027/9799.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Weisling NF. Experiences and Practices of General Education Teachers Supporting Students with Emotional Disturbance. [Thesis]. University of Illinois – Chicago; 2013. Available from: http://hdl.handle.net/10027/9799
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Chicago
11.
Kim, Inah.
Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease.
Degree: 2018, University of Illinois – Chicago
URL: http://hdl.handle.net/10027/22672
► Background: Chronic obstructive pulmonary disease (COPD) is a highly prevalent chronic respiratory disease and the third-leading cause of death in the U.S. Physical inactivity and…
(more)
▼ Background: Chronic obstructive pulmonary disease (COPD) is a highly prevalent chronic respiratory disease and the third-leading cause of death in the U.S. Physical inactivity and sleep
disturbance are much more problematic in this population than in healthy individuals; the related negative health outcomes include COPD exacerbation, hospitalization, and increased mortality. Research examining the association between sleep and physical activity (PA) in this population is limited. The purpose of this study was to identify the impact of night-time sleep on next-day PA in people with co-existing COPD and disturbed sleep using both subjectively and objectively measured sleep variables.
Method: In this secondary analysis with a repeated-measure, quantitative design, 56 mild-to-severe COPD patients who reported disturbed sleep were drawn from the baseline dataset of an ongoing randomized control trial examining efficacy and mechanisms of components of insomnia therapy on insomnia and fatigue in COPD patients. Sleep and PA were measured using the accelerometer (Actiwatch-2, Philips Respironics, Murrysville, PA) over 5 days. Night-time sleep variables included sleep onset latency (SL), sleep efficiency (SE), wake after sleep onset (WASO), total sleep time (TST), and number of awakenings (NA); PA variables included averaged daily (from awakening to bedtime) and hourly activity counts per minute. Spearman correlations and mixed-effect modeling were performed using the SPSS 24.0 program (SPSS Inc., Chicago, IL).
Results: The mean age of the participants was 65.1 years; and 53.6% were male. The mean predicted FEV1% was 69.5; and 60.7% of participants had moderate pulmonary function based on the GOLD standard. Greater mean daily PA negatively associated with SL (r=-0.48, p <.001), NA (r=-0.38, p <.01), TST (r=-0.50, p<.001), and age (r=-0.32, p<.05). Increased SL was associated with less next-day PA during afternoon and evening (4-6 p.m.). Greater WASO and NA were associated with less next-morning PA (5-8 a.m.). Greater TST was associated with less next-morning PA (12 a.m.-12 p.m.), and greater SE was associated with less next-morning (1-4 a.m.) and more evening PA (5-7 p.m.).
Conclusion: This study identified a significant influence of night-time sleep on next-day PA in people with co-existing COPD and sleep
disturbance. These results provide evidence supporting the potential value of effective sleep management to promote physical activity in people with COPD. Further research is needed to identify mechanisms underlying the sleep-PA relationship.
Advisors/Committee Members: Kapella, Mary C. (advisor), Collins, Eileen G. (committee member), Quinn, Laurie (committee member), Bronas, Ulf (committee member), Park, Chang G. (committee member), Horswill, Craig (committee member), Kapella, Mary C. (chair).
Subjects/Keywords: Physical activity
Sleep disturbance
COPD
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Manager
APA (6th Edition):
Kim, I. (2018). Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease. (Thesis). University of Illinois – Chicago. Retrieved from http://hdl.handle.net/10027/22672
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kim, Inah. “Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease.” 2018. Thesis, University of Illinois – Chicago. Accessed January 24, 2021.
http://hdl.handle.net/10027/22672.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kim, Inah. “Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease.” 2018. Web. 24 Jan 2021.
Vancouver:
Kim I. Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease. [Internet] [Thesis]. University of Illinois – Chicago; 2018. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10027/22672.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kim I. Sleep Disturbance and Physical Activity in Chronic Obstructive Pulmonary Disease. [Thesis]. University of Illinois – Chicago; 2018. Available from: http://hdl.handle.net/10027/22672
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Gothenburg / Göteborgs Universitet
12.
Svensson, J. Robin.
Ecological disturbances: the good, the bad and the ugly.
Degree: 2010, University of Gothenburg / Göteborgs Universitet
URL: http://hdl.handle.net/2077/23772
► Abstract. This thesis focuses on the definitions, characterizations and quantifications of ecological disturbances, as well as hypotheses on their impacts on biological communities. The most…
(more)
▼ Abstract. This thesis focuses on the definitions, characterizations and quantifications of
ecological disturbances, as well as hypotheses on their impacts on biological communities.
The most prominent model on effects of disturbance on diversity is the Intermediate
Disturbance Hypothesis (IDH), which is utilized in management of national reserves, has
received over 3300 citations and has been corroborated by a multitude of studies from
terrestrial and aquatic systems. According to the predictions of the IDH, diversity is high at
intermediate levels of disturbance due to coexistence of competitors and colonizers. At low
levels of disturbance diversity will be low due to competitive exclusion and few species can
persist at high levels of disturbance. In an extension of the IDH, the Dynamic Equilibrium
Model (DEM) predicts that the effects of disturbance depend on the productivity of
communities, because at high growth rates a stronger disturbance is required to counteract
increased rates of competitive exclusion. The IDH and the DEM were tested in a field
experiment on effects of physical disturbance (scraping) and productivity (nutrient
availability) on hard-substratum assemblages in paper I, where the patterns predicted by the
IDH, but not the DEM, were observed. This outcome shows the importance of the nature of
productivity alterations, as the productivity treatment had a general positive effect on growth
rates but only marginal effects on the dominant species, thereby leaving rates of competitive
exclusion unaffected.
In paper II I tested another extension of the IDH, which predicts that smaller,
more frequent disturbances will have different effects on diversity compared to larger, less
frequent disturbances. In this experiment I used two different regimes of disturbance, small
and frequent vs. large and infrequent disturbances, while the overall rate (the product of area
and frequency) was kept equal for both regimes. At the site where the IDH was supported, the
regime with a large proportion of the area disturbed infrequently showed higher richness, due
to a stronger decrease of dominants, compared to the regime with a small proportion disturbed
frequently. In addition to these significant differences in diversity effects between different
disturbance regimes, it may also matter what agent of disturbance that is causing the damage.
In paper III I contrasted the effects of a physical disturbance (wave-action) to that of a
biological disturbance (grazing), as well as their respective interactions with productivity in a
multifactorial design tested on natural epilithic assemblages. The composition of assemblages
and the total species richness was significantly affected by physical disturbance and
interactively by biological disturbance and productivity. The algal richness was significantly
affected by productivity and biological disturbance, whereas the invertebrate richness was
affected by physical disturbance. The results show, for the first time, that biological
disturbance and physical disturbance interact…
Subjects/Keywords: Disturbance; Diversity
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APA (6th Edition):
Svensson, J. R. (2010). Ecological disturbances: the good, the bad and the ugly. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/23772
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Svensson, J Robin. “Ecological disturbances: the good, the bad and the ugly.” 2010. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed January 24, 2021.
http://hdl.handle.net/2077/23772.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Svensson, J Robin. “Ecological disturbances: the good, the bad and the ugly.” 2010. Web. 24 Jan 2021.
Vancouver:
Svensson JR. Ecological disturbances: the good, the bad and the ugly. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2010. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/2077/23772.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Svensson JR. Ecological disturbances: the good, the bad and the ugly. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2010. Available from: http://hdl.handle.net/2077/23772
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
13.
Perez, Sierra Brown.
Interspecific wood trait variation predicts decreased carbon residence time in changing forests.
Degree: MS, Ecol, Evol, Conservation Biol, 2020, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/108520
► 1. Increasing disturbance will result in a significant flux in aboveground carbon (C) from live trees to deadwood, concurrent with compositional shifts. While interspecific decay…
(more)
▼ 1. Increasing
disturbance will result in a significant flux in aboveground carbon (C) from live trees to deadwood, concurrent with compositional shifts. While interspecific decay variation is widely reported, the implications of forest compositional change on ecosystem-level deadwood decay and consequently, the future of a globally significant C pool have not been previously explored.
2. Leveraging a 25-year treefall record for two eastern hardwood forests in central Illinois, USA, we used a chronosequence approach to estimate downed deadwood decay rates for eight common tree taxa. We hypothesized the increasing dominance of Acer spp. in eastern forests, due to
disturbance regime changes, is driving a decrease in the mean species-weighted deadwood decay rate, decreasing the total C storage capacity of regional forests.
3. We observed significantly greater interspecific variation in deadwood decay rates than short- term studies, with a thirteen-fold difference in half-lives between Aesculus glabra (T1/2 = 6.4 years) and Quercus spp. (T1/2 = 77.8) logs. The canopy-dominant Acer saccharum (T1/2 = 17.8) decayed significantly faster than other historically dominant eastern taxa, Quercus spp. and Fraxinus spp. (T1/2 = 47.4). At multi-decadal timescales, wood traits, notably taxon initial wood C:N ratio and Mn concentration, outweighed environmental factors in explaining variation in decay rates. A significant interaction between soil pH and wood Mn, which co-regulate microbial lignin degradation, suggests a similar importance of Mn in modulating woody debris decay rates as has been previously described for litter decay.
4. Synthesis. Our decay estimates highlight the importance of long-term studies for accurately assessing decay of recalcitrant species (high C:N ratio), as short-term decay studies are prone to underestimating their decay rates. Our results suggest that current and future forest compositional changes will have direct consequences on the residence time of the deadwood C pool due to interspecific wood trait variation.
Advisors/Committee Members: Dalling, James W (advisor), Fraterrigo, Jennifer M (advisor), Yang, Wendy H (committee member), Yannarell, Anthony C (committee member).
Subjects/Keywords: Deadwood; carbon storage; decay; disturbance
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APA (6th Edition):
Perez, S. B. (2020). Interspecific wood trait variation predicts decreased carbon residence time in changing forests. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/108520
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Perez, Sierra Brown. “Interspecific wood trait variation predicts decreased carbon residence time in changing forests.” 2020. Thesis, University of Illinois – Urbana-Champaign. Accessed January 24, 2021.
http://hdl.handle.net/2142/108520.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Perez, Sierra Brown. “Interspecific wood trait variation predicts decreased carbon residence time in changing forests.” 2020. Web. 24 Jan 2021.
Vancouver:
Perez SB. Interspecific wood trait variation predicts decreased carbon residence time in changing forests. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2020. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/2142/108520.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Perez SB. Interspecific wood trait variation predicts decreased carbon residence time in changing forests. [Thesis]. University of Illinois – Urbana-Champaign; 2020. Available from: http://hdl.handle.net/2142/108520
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
14.
Glasby, Mack.
Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States.
Degree: MS, Natural Resources Science and Management, 2016, University of Minnesota
URL: http://hdl.handle.net/11299/182693
► Forest disturbances cause changes in site conditions and forest structure which in turn influences the species composition of the site. This study utilized Forest Inventory…
(more)
▼ Forest disturbances cause changes in site conditions and forest structure which in turn influences the species composition of the site. This study utilized Forest Inventory and Analysis (FIA) annual plot data collected between 1999 and 2014, in Michigan, Minnesota, and Wisconsin to analyze the impacts of disturbance across the region. The study also analyzed the accuracy of the Forest Vegetation Simulator- Lake States (FVS-LS) diameter growth equation in disturbed and non-disturbed forests. Results showed that animal and weather disturbances were the most common disturbance agents in the region, while human-caused disturbance (excluding timber harvesting) resulted in the largest losses in live and standing dead tree basal area. Results indicated that the FVS-LS diameter growth equations performed well on average, but when the data were grouped by species or disturbance, the model equation was rarely validated using equivalence tests. Findings highlight the importance of incorporating forest disturbance into tree and stand growth and yield projections.
Subjects/Keywords: Disturbance; Forestry; Growth; Lake States
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APA ·
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APA (6th Edition):
Glasby, M. (2016). Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/182693
Chicago Manual of Style (16th Edition):
Glasby, Mack. “Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States.” 2016. Masters Thesis, University of Minnesota. Accessed January 24, 2021.
http://hdl.handle.net/11299/182693.
MLA Handbook (7th Edition):
Glasby, Mack. “Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States.” 2016. Web. 24 Jan 2021.
Vancouver:
Glasby M. Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States. [Internet] [Masters thesis]. University of Minnesota; 2016. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/11299/182693.
Council of Science Editors:
Glasby M. Assessing the impacts of forest disturbances on stand and individual tree growth in the Lake States. [Masters Thesis]. University of Minnesota; 2016. Available from: http://hdl.handle.net/11299/182693
University of Waterloo
15.
Liu, Yining.
A Targeting Approach To Disturbance Rejection In Multi-Agent Systems.
Degree: 2012, University of Waterloo
URL: http://hdl.handle.net/10012/6841
► This thesis focuses on deadbeat disturbance rejection for discrete-time linear multi-agent systems. The multi-agent systems, on which Spieser and Shams’ decentralized deadbeat output regulation problem…
(more)
▼ This thesis focuses on deadbeat disturbance rejection for discrete-time linear multi-agent systems. The multi-agent systems, on which Spieser and Shams’ decentralized deadbeat output regulation problem is based, are extended by including disturbance agents. Specifically, we assume that there are one or more disturbance agents interacting with the plant agents in some known manner. The disturbance signals are assumed to be unmeasured and, for simplicity, constant. Control agents are introduced to interact with the plant agents, and each control agent is assigned a target plant agent. The goal is to drive the outputs of all plant agents to zero in finite time, despite the presence of the disturbances. In the decentralized deadbeat output regulation problem, two analysis schemes were introduced: targeting analysis, which is used to determine
whether or not control laws can be found to regulate, not all the agents, but only the target agents; and growing analysis, which is used to determine the behaviour of all the non-target agents when the control laws are applied. In this thesis these two analyses are adopted to the deadbeat disturbance rejection problem. A new necessary condition for successful disturbance rejection is derived, namely that a control agent must be connected to the same plant agent to which a disturbance agent is connected. This result puts a bound on the minimum number of control agents and constraints the locations of control agents. Then, given the premise that both targeting and growing
analyses succeed in the special case where the disturbances are all ignored, a new control approach is proposed for the linear case based on the idea of integral control and the regulation methods of Spieser and Shams. Preliminary studies show that this approach is also suitable for some nonlinear systems.
Subjects/Keywords: Disturbance rejection; Multi-agent systems
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APA (6th Edition):
Liu, Y. (2012). A Targeting Approach To Disturbance Rejection In Multi-Agent Systems. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/6841
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Yining. “A Targeting Approach To Disturbance Rejection In Multi-Agent Systems.” 2012. Thesis, University of Waterloo. Accessed January 24, 2021.
http://hdl.handle.net/10012/6841.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Yining. “A Targeting Approach To Disturbance Rejection In Multi-Agent Systems.” 2012. Web. 24 Jan 2021.
Vancouver:
Liu Y. A Targeting Approach To Disturbance Rejection In Multi-Agent Systems. [Internet] [Thesis]. University of Waterloo; 2012. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10012/6841.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Liu Y. A Targeting Approach To Disturbance Rejection In Multi-Agent Systems. [Thesis]. University of Waterloo; 2012. Available from: http://hdl.handle.net/10012/6841
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
16.
Chuecos Escobar, Gabriela (author).
The wild plant library: Approaching the urban wilderness.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:92af32a8-8c4c-473a-9ba1-148a319fed6f
► Mostar contains a multiplicity of ruined, abandoned and contested spaces, a consequence of the war in which it was involved between 1992 and 1996. But…
(more)
▼ Mostar contains a multiplicity of ruined, abandoned and contested spaces, a consequence of the war in which it was involved between 1992 and 1996. But to define those spaces today we cannot think only of the violent changes that originated them. The fact that war ruins remained long after the end of the armed conflict, becoming blank spots in the city, allowed them to slowly transform into something else. The abandonment of those structures enabled the processes of ruination and decay to progress, making them less appealing to humans and giving space for non-human actors to start reclaiming portions of the city. Today, new and renovated buildings stand between neglected ruins and stalled constructions, many of them overgrown by spontaneous vegetation. Plants have taken over the leftovers of war, shaping a new kind of space that is neither completely urban nor wild: the urban wilderness. And if we look even closer into this combination of apparently dissimilar conditions, we will find a kind of coexistence that goes beyond the sharing of spaces in the city. What was once an area of general destruction is now covered by plants growing directly from war debris and contaminated soils. With time, man-made and plants have further entangled, forming hybrids where matter and life intersect and support each other, turning ruined areas into the perfect ground for new interactions between humans and non-humans.
Advisors/Committee Members: Pilav, Armina (mentor), Adema, Ferry (mentor), de Wit, Leontine (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: coexistence; disturbance; ruin; wilderness; experience
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APA (6th Edition):
Chuecos Escobar, G. (. (2019). The wild plant library: Approaching the urban wilderness. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:92af32a8-8c4c-473a-9ba1-148a319fed6f
Chicago Manual of Style (16th Edition):
Chuecos Escobar, Gabriela (author). “The wild plant library: Approaching the urban wilderness.” 2019. Masters Thesis, Delft University of Technology. Accessed January 24, 2021.
http://resolver.tudelft.nl/uuid:92af32a8-8c4c-473a-9ba1-148a319fed6f.
MLA Handbook (7th Edition):
Chuecos Escobar, Gabriela (author). “The wild plant library: Approaching the urban wilderness.” 2019. Web. 24 Jan 2021.
Vancouver:
Chuecos Escobar G(. The wild plant library: Approaching the urban wilderness. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 24].
Available from: http://resolver.tudelft.nl/uuid:92af32a8-8c4c-473a-9ba1-148a319fed6f.
Council of Science Editors:
Chuecos Escobar G(. The wild plant library: Approaching the urban wilderness. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:92af32a8-8c4c-473a-9ba1-148a319fed6f
Colorado State University
17.
Eurich, Abigail M.
Effects of flow modification and forest disturbance on streamflow across Colorado.
Degree: MS(M.S.), Ecosystem Science and Sustainability, 2020, Colorado State University
URL: http://hdl.handle.net/10217/211994
► Human activities alter streamflow around the world. In Colorado, flow modifications, land use change, and forest disturbances all modify streamflow, but the relative magnitudes of…
(more)
▼ Human activities alter streamflow around the world. In Colorado, flow modifications, land use change, and forest disturbances all modify streamflow, but the relative magnitudes of these effects are not well-quantified. This study examined how streamflow quantity across Colorado has been affected by three classes of change: (1) flow modifications from reservoirs and diversions, (2) urbanization, and (3) forest
disturbance. The goal of this work was to identify the magnitude of streamflow alterations from these different types of stressors to understand the sensitivity of the state's streams to future changes, both natural and anthropogenic. A total of 215 watersheds were used to analyze effects of flow modifications and urbanization, and 71 of these watersheds were analyzed for effects of forest
disturbance. Flow modifications and land use change have altered 85% of the gaged streams in this study. Of the stressors studied, the largest effects are from transbasin diversions, which reduce flow by an average of 20% in watersheds with diversions out of the watershed and increase flow by an average of 221% in watersheds with diversions importing water from another basin. Across all types of watersheds, the gaged streams in the Plains and Southwest regions of the state are most altered, and those in the Rio Grande are the least altered. The lower elevation areas are experiencing the largest percent changes relative to their natural flow regime (average water imports = 38 mm, 875%); the reduction in flow from high elevation watersheds is large in magnitude as well, but it equates to a smaller percent of the expected flow (average water exports = -71 mm, -18%). Forest
disturbance may increase or decrease streamflow depending on the characteristics of the watershed and the
disturbance, but the magnitude of the impact remains within the natural variability of streamflow in similar watersheds. A significant change in streamflow was observed in 25% of watersheds affected by
disturbance, mainly with increases in flow following beetle mortality and severe wildfire. Streamflow decreased following smaller wildfires and in watersheds with South- and West-facing dominant aspects. Overall, anthropogenic modifications to streamflow via diversions that move water between watersheds have the largest effect on mean annual streamflow, whereas streamflow changes from forest
disturbance mostly remain within the range of natural variability.
Advisors/Committee Members: Kampf, Stephanie K. (advisor), Bhaskar, Aditi (committee member), Evangilista, Paul (committee member).
Subjects/Keywords: diversion; transbasin; disturbance; urban; hydrology
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APA (6th Edition):
Eurich, A. M. (2020). Effects of flow modification and forest disturbance on streamflow across Colorado. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/211994
Chicago Manual of Style (16th Edition):
Eurich, Abigail M. “Effects of flow modification and forest disturbance on streamflow across Colorado.” 2020. Masters Thesis, Colorado State University. Accessed January 24, 2021.
http://hdl.handle.net/10217/211994.
MLA Handbook (7th Edition):
Eurich, Abigail M. “Effects of flow modification and forest disturbance on streamflow across Colorado.” 2020. Web. 24 Jan 2021.
Vancouver:
Eurich AM. Effects of flow modification and forest disturbance on streamflow across Colorado. [Internet] [Masters thesis]. Colorado State University; 2020. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10217/211994.
Council of Science Editors:
Eurich AM. Effects of flow modification and forest disturbance on streamflow across Colorado. [Masters Thesis]. Colorado State University; 2020. Available from: http://hdl.handle.net/10217/211994
University of Manchester
18.
Henry, Alasdair Lawrie.
A multi method examination of sleep disturbance in
patients with psoriasis.
Degree: 2018, University of Manchester
URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:314144
► Psoriasis is an immune-mediated chronic dermatological condition associated with a range of physical and psychological comorbidities, and a significant disease burden. Healthy sleep plays a…
(more)
▼ Psoriasis is an immune-mediated chronic
dermatological condition associated with a range of physical and
psychological comorbidities, and a significant disease burden.
Healthy sleep plays a key role in maintaining health and wellbeing.
Conversely, chronic sleep
disturbance significantly increases the
risk of developing a range of physical and mental health conditions
if left untreated. Sleep
disturbance is a known feature of other
chronic conditions and is associated with disease-specific
influences and consequences. Therefore, given the links between
sleep, health and functioning, the experience of sleep
disturbance
in psoriasis was investigated using a multi-method approach.
Chapter One provides an overview of psoriasis and sleep and the
potential impact psoriasis and sleep
disturbance can have on health
and wellbeing. Chapter Two identifies what is known from the
existing literature and the limitations of the studies reviewed.
From here a prospective research agenda was formulated. A
cross-sectional survey (Chapter Three) sought to address the gaps
in the literature by examining the extent, characteristics and
correlates of sleep
disturbance using validated measures. Chapter
Four then describes the first in-depth qualitative study exploring
the experience of sleep
disturbance in people with psoriasis. The
Common-Sense Model of Self-Regulation was used as a guiding
framework and facilitated exploration of beliefs, emotions and
behaviours associated with sleep
disturbance. This study provided
insights into the role of psoriasis specific factors, the impact of
sleep
disturbance on daily life and the limited coping options
available. Using Experience Sampling Methodology, Chapter Five
examined the bi-directional and sequential relationships between
sleep
disturbance and daytime variables in psoriasis. Multiple
daily assessments of psoriasis, mood, night-time experiences and
functioning were combined with actigraphy and sleep dairies. This
study revealed possible treatment targets to improve sleep and
daytime functioning. However, findings related to psoriasis were
contrary to previous chapters. The findings from the preceding
chapters were synthesised in Chapter Six. The methodologies used
were also critically appraised. Clinical implications were
discussed in addition to a brief overview of potential avenues for
future research.
Advisors/Committee Members: CORDINGLEY, LIS ME, CHISHOLM, ANNA A, KYLE, SIMON SD, Bundy, Christine, Cordingley, Lis, Chisholm, Anna, Kyle, Simon.
Subjects/Keywords: sleep; sleep disturbance; psoriasis
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Manager
APA (6th Edition):
Henry, A. L. (2018). A multi method examination of sleep disturbance in
patients with psoriasis. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:314144
Chicago Manual of Style (16th Edition):
Henry, Alasdair Lawrie. “A multi method examination of sleep disturbance in
patients with psoriasis.” 2018. Doctoral Dissertation, University of Manchester. Accessed January 24, 2021.
http://www.manchester.ac.uk/escholar/uk-ac-man-scw:314144.
MLA Handbook (7th Edition):
Henry, Alasdair Lawrie. “A multi method examination of sleep disturbance in
patients with psoriasis.” 2018. Web. 24 Jan 2021.
Vancouver:
Henry AL. A multi method examination of sleep disturbance in
patients with psoriasis. [Internet] [Doctoral dissertation]. University of Manchester; 2018. [cited 2021 Jan 24].
Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:314144.
Council of Science Editors:
Henry AL. A multi method examination of sleep disturbance in
patients with psoriasis. [Doctoral Dissertation]. University of Manchester; 2018. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:314144
Colorado State University
19.
Wilkins, Kate.
Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado.
Degree: MS(M.S.), Ecology, 2012, Colorado State University
URL: http://hdl.handle.net/10217/75300
► Human recreational activities can disturb wildlife by causing animals to alter feeding patterns, or change feeding locations. Migratory birds in particular can be susceptible to…
(more)
▼ Human recreational activities can disturb wildlife by causing animals to alter feeding patterns, or change feeding locations. Migratory birds in particular can be susceptible to
disturbance since they have limited time for resting, feeding and courtship along their migratory routes. Sandhill cranes (Grus canadensis) are an iconic and charismatic species that stop in Colorado's San Luis Valley during each spring and fall migration, which has led to an annual spring bird watching festival at the Monte Vista National Wildlife Refuge. The goal of this research was to understand how birdwatchers drawn by the festival affect the behavior of sandhill cranes in this important migration stopover site. For the purposes of this research, "birdwatchers" are defined as any person present in the pullouts where we conducted observations of crane behavior. The behavior of sandhill cranes was observed using focal animal sampling techniques during March 2010 and 2011 at sites both on and off the Monte Vista National Wildlife Refuge. The number of birdwatchers at a particular site did not affect the time cranes spent in vigilance postures; however, cranes spent more time vigilant on the Monte Vista National Wildlife Refuge than on privately owned lands, where there were fewer observers. Overall, the results of this study suggest that the birdwatchers during the festival had minimal impact on sandhill crane behavior on the refuge, including open lands managed as agricultural fields. The results of this research can inform adaptive management approaches to balance bird watching opportunities and the needs of charismatic migratory species.
Advisors/Committee Members: Moore, John (advisor), Bowser, Gillian (advisor), Angeloni, Lisa (committee member), Pejchar, Liba (committee member).
Subjects/Keywords: bird behavior; risk-disturbance hypothesis; human disturbance to wildlife
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APA (6th Edition):
Wilkins, K. (2012). Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/75300
Chicago Manual of Style (16th Edition):
Wilkins, Kate. “Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado.” 2012. Masters Thesis, Colorado State University. Accessed January 24, 2021.
http://hdl.handle.net/10217/75300.
MLA Handbook (7th Edition):
Wilkins, Kate. “Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado.” 2012. Web. 24 Jan 2021.
Vancouver:
Wilkins K. Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado. [Internet] [Masters thesis]. Colorado State University; 2012. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10217/75300.
Council of Science Editors:
Wilkins K. Effects of birdwatchers on sandhill crane (Grus canadensis) behavior at spring stopover sites in the San Luis Valley, Colorado. [Masters Thesis]. Colorado State University; 2012. Available from: http://hdl.handle.net/10217/75300
Colorado State University
20.
Fleming, Jean L.
Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The.
Degree: MS(M.S.), Ecology, 2015, Colorado State University
URL: http://hdl.handle.net/10217/166952
► Disturbances in forested ecosystems create ecological legacies that can affect future disturbances and these disturbance interactions influence post-disturbance establishment. In addition, disturbances can become compounded…
(more)
▼ Disturbances in forested ecosystems create ecological legacies that can affect future disturbances and these
disturbance interactions influence post-
disturbance establishment. In addition, disturbances can become compounded and cause drastic ecosystem changes including decreased post-
disturbance establishment, regeneration of unexpected species assemblages, or shifts to alternative stable states. I studied the post-
disturbance establishment of five tree species following two interacting disturbances, a bark beetle outbreak and a high-severity fire. The goal of my research was to identify the factors that influence post-
disturbance seedling establishment, and to determine how bark beetle-fire interactions affect forest regeneration. I evaluated seedling establishment at 98 study sites across the Cow Creek fire in Rocky Mountain National Park. Two bark beetle species, mountain pine beetle (Dendroctonus ponderosae) and spruce beetle (Dendroctonus rufipennis), caused epidemic scale tree mortality in the five years before the fire. I created a Bayesian mixture model for each tree species to assess the independent variables that influenced the abundance of the species' establishment. The variables that influenced mean seedling abundance were different for each species. Forest age, distance to a seed source following the fire, and
disturbance interactions affected the seedling abundance for most of the species. The presence of recent bark beetle activity had a measurable affect on post-
disturbance establishment for three species. P. contorta and P. tremuloides mean abundance increased by a factor of 3.1 and 1.4, respectively, in areas with mountain pine beetle
disturbance. The mean abundance of P. engelmannii seedlings was 3.8 times greater in areas where spruce beetle had caused tree mortality before the fire. This increase in seedling abundance in areas with bark beetle presence was independent of the other studied factors, including fire severity and elevation. The increased seeding abundance I recorded following bark beetle and fire
disturbance suggests that interacting disturbances can increase the likelihood that forests will recover to their original species assemblages. The results of this study should be utilized to inform future forest management and to avoid unnecessary management action.
Advisors/Committee Members: Sibold, Jason (advisor), Baron, Jill (committee member), Hobbs, N. Thompson (committee member).
Subjects/Keywords: disturbance interactions; disturbance; subalpine forest; regeneration; Rocky Mountains
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Manager
APA (6th Edition):
Fleming, J. L. (2015). Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/166952
Chicago Manual of Style (16th Edition):
Fleming, Jean L. “Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The.” 2015. Masters Thesis, Colorado State University. Accessed January 24, 2021.
http://hdl.handle.net/10217/166952.
MLA Handbook (7th Edition):
Fleming, Jean L. “Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The.” 2015. Web. 24 Jan 2021.
Vancouver:
Fleming JL. Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The. [Internet] [Masters thesis]. Colorado State University; 2015. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10217/166952.
Council of Science Editors:
Fleming JL. Effects of bark beetle-fire disturbance interactions on post-disturbance forest regeneration, The. [Masters Thesis]. Colorado State University; 2015. Available from: http://hdl.handle.net/10217/166952
NSYSU
21.
Huang, Min-Fen.
Finding the association between the quiet standing force plate measures and dynamic balance EMG responses.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713115-152313
► In recent centuries, the average life expectancy has significantly increased. Our society is thus becoming an aging society. Therefore, the nursing problem for elder people…
(more)
▼ In recent centuries, the average life expectancy has significantly increased. Our society is thus becoming an aging society. Therefore, the nursing problem for elder people has received a lot of attention. When people get older, their muscle strength, focus ability, and physical strength inevitable decline. As a result, the risk of falling increases significantly with aging. Since falling is an independent risk factor of death for elder people, preventing falling by evaluating the balance ability has becoming an important issue.
To toward this goal, dynamic posturography evaluates postural stability by disrupting a stable stance and measuring the postural response to such external perturbations. In contrast, static posturography measures the postural steadiness of the human body without any external excitation.
To goal of this work is to investigate the possible correlations between the static and dynamic posturography features. Extracted from the EMG signals measured from 12 different locations, the dynamic posturography features employed in this study include IEMG and latency-time. Based on the measurements of a force platform, the employed static posturography features include conventional COP features and features developed in this work.
By disrupting the stable stance of 11 tests
subject from both forward and backward directions, the experimental results find outs that correlations between the static and dynamic posturography features are direction and muscle dependent.
A possible application of these results is try to predict the performances of dynamic posturography by using the results obtained from static posturography since the latter is much simpler to perform than the former.
Advisors/Committee Members: Pei-Chung Chen (chair), Chen-Wen Yen (committee member), Jian-de Lee (chair).
Subjects/Keywords: force platform; EMG; unexpected disturbance; dynamic balance
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Manager
APA (6th Edition):
Huang, M. (2016). Finding the association between the quiet standing force plate measures and dynamic balance EMG responses. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713115-152313
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Huang, Min-Fen. “Finding the association between the quiet standing force plate measures and dynamic balance EMG responses.” 2016. Thesis, NSYSU. Accessed January 24, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713115-152313.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Huang, Min-Fen. “Finding the association between the quiet standing force plate measures and dynamic balance EMG responses.” 2016. Web. 24 Jan 2021.
Vancouver:
Huang M. Finding the association between the quiet standing force plate measures and dynamic balance EMG responses. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Jan 24].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713115-152313.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Huang M. Finding the association between the quiet standing force plate measures and dynamic balance EMG responses. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713115-152313
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Dalhousie University
22.
Mason, Rebecca.
An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland.
Degree: Master of Applied Science, Department of Process Engineering and Applied
Science, 2010, Dalhousie University
URL: http://hdl.handle.net/10222/13096
► A peatland near Lake Charlotte, Nova Scotia that had been damaged by all-terrain vehicles (ATVs) was identified as a compensatory mitigation site. Restoration practices commonly…
(more)
▼ A peatland near Lake Charlotte, Nova Scotia that had
been damaged by all-terrain vehicles (ATVs) was identified as a
compensatory mitigation site. Restoration practices commonly used
for harvested peatlands were applied to small sections of ATV
damaged peatland. In the test plots, treatments of moss and shrub
transplantation, fertilizer application, and straw mulch addition
were applied in various combinations to determine the optimum
restoration approach for specific areas within the Lake Charlotte
peatland complex. The overall objective of this research was to
recommend a procedure for the complete restoration of the damaged
portions of the peatland. A number of different hydrological,
physio-chemical and biological parameters were monitored throughout
the 2009 growing season to evaluate the effectiveness of the
different treatments. In conclusion, this study demonstrated that
techniques developed to restore peatlands degraded by peat
extraction activities are also effective for restoring peatlands
impacted by ATV use.
Advisors/Committee Members: Dr. Brazner (external-examiner), Kaprice Higgins (graduate-coordinator), Dr. Ben-Abdallah (thesis-reader), Dr. Jamieson (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).
Subjects/Keywords: peatland restoration; peatland disturbance; restoration techniques
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APA (6th Edition):
Mason, R. (2010). An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/13096
Chicago Manual of Style (16th Edition):
Mason, Rebecca. “An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland.” 2010. Masters Thesis, Dalhousie University. Accessed January 24, 2021.
http://hdl.handle.net/10222/13096.
MLA Handbook (7th Edition):
Mason, Rebecca. “An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland.” 2010. Web. 24 Jan 2021.
Vancouver:
Mason R. An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland. [Internet] [Masters thesis]. Dalhousie University; 2010. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10222/13096.
Council of Science Editors:
Mason R. An Evaluation of Restoration Techniques for a Small Scale
All-Terrain-Vehicle Disturbance in the Lake Charlotte
Peatland. [Masters Thesis]. Dalhousie University; 2010. Available from: http://hdl.handle.net/10222/13096
Mississippi State University
23.
Lancaster, Amity M.
Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes.
Degree: PhD, Counseling, Educational Psychology, and Foundations, 2016, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06232016-123135/
;
► The current study examined preservice teachers expectations for student academic, behavior, and social, outcomes using the <i>Prognostic Outlook Scale</i> (Thelen, Burns, & Christiansen, 2003).…
(more)
▼ The current study examined preservice teachers expectations for student academic, behavior, and social, outcomes using the <i>Prognostic Outlook Scale</i> (Thelen, Burns, & Christiansen, 2003). A 2 x 2 x 2 MANOVA analysis was used to determine differences between label specificity (i.e., Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition diagnostic label versus the Individuals with Disabilities Education Improvement Act [IDEA] Emotional
Disturbance [ED]) label, behavioral presentation (i.e., internalizing versus externalizing) and symptom severity (i.e., mild versus severe). The goal was to identify labels that elicit higher expectations for students with ED in order to inform the labeling practices within the school setting. Results suggested statistically significant differences for the behavioral presentation (p < .001) condition. Statistically significant interactions for behavioral presentation and label specificity (p = .043) and behavioral presentation and severity (p = .045) were also found. Implications and limitations of findings will be discussed.
Advisors/Committee Members: Tawny E. McCleon (chair), Carlen Henington (chair), David T. Morse (committee member), Cheryl A. Justice (committee member).
Subjects/Keywords: teacher expectations; emotional disturbance; student outcomes; labeling
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APA (6th Edition):
Lancaster, A. M. (2016). Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-06232016-123135/ ;
Chicago Manual of Style (16th Edition):
Lancaster, Amity M. “Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes.” 2016. Doctoral Dissertation, Mississippi State University. Accessed January 24, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-06232016-123135/ ;.
MLA Handbook (7th Edition):
Lancaster, Amity M. “Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes.” 2016. Web. 24 Jan 2021.
Vancouver:
Lancaster AM. Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes. [Internet] [Doctoral dissertation]. Mississippi State University; 2016. [cited 2021 Jan 24].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06232016-123135/ ;.
Council of Science Editors:
Lancaster AM. Impact of diagnostic versus emotional disturbance label on preservice teacher expectations of student academic, behavior, and social outcomes. [Doctoral Dissertation]. Mississippi State University; 2016. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06232016-123135/ ;
Mississippi State University
24.
Kennedy, Jason Alan.
DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY.
Degree: MA, Anthropology and Middle Eastern Cultures, 2011, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06222011-112405/
;
► Significance and integrity are key concepts for archaeology, and how they are judged is determined by an archaeologists perceptions of disturbance. This thesis explicitly…
(more)
▼ Significance and integrity are key concepts for archaeology, and how they are judged is determined by an archaeologists perceptions of
disturbance. This thesis explicitly considers these concepts and how they relate to evolutionary theory and National Register eligibility. A site with known
disturbance was chosen to determine whether it could be judged significant assuming that there was no
disturbance. Controlled surface collection, magnetometer survey, excavation and landowner interview data were used to determine whether what made the site significant had been lost due to
disturbance. The results indicate that the co-mingling of occupations in the plow zone normally would have prevented the site from being determined eligible. However, because of the clusters of Gulf Formational-period diagnostics and intact Early Archaic midden, the site was determined significant. If future work were to be performed, occupation-based work focusing on the artifact clusters and the Archaic midden is recommended.
Advisors/Committee Members: Evan Peacock (committee member), Janet Rafferty (committee member), James Hardin (committee member).
Subjects/Keywords: Integrity; Disturbance; Occupation; National Register Determination; Significance
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Manager
APA (6th Edition):
Kennedy, J. A. (2011). DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-06222011-112405/ ;
Chicago Manual of Style (16th Edition):
Kennedy, Jason Alan. “DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY.” 2011. Masters Thesis, Mississippi State University. Accessed January 24, 2021.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-06222011-112405/ ;.
MLA Handbook (7th Edition):
Kennedy, Jason Alan. “DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY.” 2011. Web. 24 Jan 2021.
Vancouver:
Kennedy JA. DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY. [Internet] [Masters thesis]. Mississippi State University; 2011. [cited 2021 Jan 24].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06222011-112405/ ;.
Council of Science Editors:
Kennedy JA. DISTURBANCE AND ITS EFFECTS ON ARCHAEOLOGICAL SIGNIFICANCE AND INTEGRITY. [Masters Thesis]. Mississippi State University; 2011. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-06222011-112405/ ;
San Jose State University
25.
Gunvalson, Megan Maye.
Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay.
Degree: MS, Environmental Studies, 2011, San Jose State University
URL: https://doi.org/10.31979/etd.7zzx-bmmm
;
https://scholarworks.sjsu.edu/etd_theses/3931
► Team OCEAN is a kayaker-outreach program located in Monterey Bay National Marine Sanctuary under the direction of the National Oceanic and Atmospheric Administration, whose…
(more)
▼ Team OCEAN is a kayaker-outreach program located in Monterey Bay National Marine Sanctuary under the direction of the National Oceanic and Atmospheric Administration, whose goal is to reduce disturbances to marine mammals by kayakers. This study documented the interactions between kayakers and resting harbor seals (Phoca vitulina) and southern sea otters (Enhydra lutris nereis) at Team OCEAN's two outreach sites, Cannery Row and Elkhorn Slough, to determine if outreach was effective in reducing disturbances to harbor seals and sea otters.
No difference was observed in the percentage of kayaks causing disturbances to resting harbor seals when comparing days Team OCEAN was on the water to days they were not present. However, the percentage of kayaks causing disturbances to resting sea otters was significantly lower when Team OCEAN was present. Kayaks that approached animals directly were responsible for significantly more intense disturbances than those that approached animals tangentially.
Recommendations from this study include a continued presence of Team OCEAN at both sites and the extension of the program into the fall months during weekends.
Subjects/Keywords: conservation; disturbance; harbor seal; sea otter
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APA (6th Edition):
Gunvalson, M. M. (2011). Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay. (Masters Thesis). San Jose State University. Retrieved from https://doi.org/10.31979/etd.7zzx-bmmm ; https://scholarworks.sjsu.edu/etd_theses/3931
Chicago Manual of Style (16th Edition):
Gunvalson, Megan Maye. “Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay.” 2011. Masters Thesis, San Jose State University. Accessed January 24, 2021.
https://doi.org/10.31979/etd.7zzx-bmmm ; https://scholarworks.sjsu.edu/etd_theses/3931.
MLA Handbook (7th Edition):
Gunvalson, Megan Maye. “Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay.” 2011. Web. 24 Jan 2021.
Vancouver:
Gunvalson MM. Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay. [Internet] [Masters thesis]. San Jose State University; 2011. [cited 2021 Jan 24].
Available from: https://doi.org/10.31979/etd.7zzx-bmmm ; https://scholarworks.sjsu.edu/etd_theses/3931.
Council of Science Editors:
Gunvalson MM. Reducing Disturbances to Marine Mammals by Kayakers in the Monterey Bay. [Masters Thesis]. San Jose State University; 2011. Available from: https://doi.org/10.31979/etd.7zzx-bmmm ; https://scholarworks.sjsu.edu/etd_theses/3931
University of Alberta
26.
Nordell, Cameron J.
Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season.
Degree: MS, Department of Biological Sciences, 2016, University of Alberta
URL: https://era.library.ualberta.ca/files/c5d86p026n
► The expansion of the human footprint across the world is increasing the number of interactions between humans and wildlife. Many studies have quantified wildlife behavioural…
(more)
▼ The expansion of the human footprint across the world
is increasing the number of interactions between humans and
wildlife. Many studies have quantified wildlife behavioural
responses to humans, as this is an active area of research with
practical implications for species conservation. Animal behaviour
may be influenced by the properties of the human disturbance
itself, the environment in which the interaction occurs, and the
individual's past experience, but these potentially important
factors have rarely been evaluated. Furthermore, it is unclear how
individuals behave through time after a human disturbance. In
southern Alberta and Saskatchewan, I quantified flight initiation
from the nest by Ferruginous Hawks (Buteo regalis) in response to
approaching investigators and used digital video systems to
quantify their behaviour following investigator departure. In
Chapter 2 I studied the flight initiation distance (FID), the
distance at which flight is initiated from the nest in response to
an approaching threat, by adult Ferruginous Hawks. We used FID to
quantify the relative probability of flight during a given
approach. Probability of flight was related to the type of approach
by investigators, the anthropogenic landscape around the nest, and
the number of previous visits by investigators. Approaches by
humans on foot resulted in a greater probability of flight than
those in a vehicle. Approaches while driving on private access
roads, which are roads used infrequently by vehicles, were
associated with increased probability of flight relative to other
road types. Probability of flight was negatively related to an
index for the number of vehicles passing near the nest, and
increased as the number of previous investigator approaches to the
nest increased. Chapter 2 highlights the dynamic and complex nature
of the decision to initiate flight from the nest and provides
insight as to why probability of flight varies within a species.
Having explored factors influencing the Ferruginous Hawk's decision
to initiate flight in response to human disturbance in Chapter 2,
Chapter 3 focused on the behavioural consequence through time after
being disturbed by humans. Here, I used digital video footage of
Ferruginous Hawk nests to document behaviour at the nest of adult
males and females up to 12 hrs following an investigator
disturbance, and test two non-exclusive hypotheses that may explain
differences in behaviour relative to undisturbed control periods.
On average, across the 12-hr sample period, female Ferruginous
Hawks spent significantly less time on the nest following
investigator disturbance compared to controls, but individual
variation was high. Delivery of prey items to the nest was not
significantly different between disturbed and control sample
periods for the same nests. Time on nest was initially lower for
disturbed females than for controls but became more similar over
the span of the 12-hr sample. Age of nestlings and number of
nestlings were important, as female time on the nest returned to
control-levels more…
Subjects/Keywords: flight initiation distance; human disturbance; raptor behaviour
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APA (6th Edition):
Nordell, C. J. (2016). Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c5d86p026n
Chicago Manual of Style (16th Edition):
Nordell, Cameron J. “Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season.” 2016. Masters Thesis, University of Alberta. Accessed January 24, 2021.
https://era.library.ualberta.ca/files/c5d86p026n.
MLA Handbook (7th Edition):
Nordell, Cameron J. “Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season.” 2016. Web. 24 Jan 2021.
Vancouver:
Nordell CJ. Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2021 Jan 24].
Available from: https://era.library.ualberta.ca/files/c5d86p026n.
Council of Science Editors:
Nordell CJ. Ferruginous Hawk (Buteo regalis) responses to human
disturbance during the breeding season. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c5d86p026n
Oregon State University
27.
Yatskov, Mikhail A.
The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska.
Degree: PhD, Forest Science, 2016, Oregon State University
URL: http://hdl.handle.net/1957/58561
► Changes in climate caused by increased concentrations of carbon dioxide (CO₂) in the Earth’s atmosphere have led land and ocean surface temperatures to increase by…
(more)
▼ Changes in climate caused by increased concentrations of carbon dioxide (CO₂) in the Earth’s atmosphere have led land and ocean surface temperatures to increase by 0.85°C and sea level to increase by 19 cm relative to preindustrial times. Global climate change will lead to further alterations in mean temperature and precipitation, as well as their extremes that are likely to influence
disturbance regimes.
Disturbance play an important role in forest dynamics and succession, by influencing forest ecosystems structure and function, reorganizing forests by reducing live and increasing dead matter, and thus affecting ecosystem carbon (C) balances. Under a changing climate disturbances are likely to cause widespread tree mortality across forested landscapes, creating vast amounts of coarse woody debris (CWD) that will emit C to the atmosphere to a degree that regional C balances and future C dynamics are likely to change.
C balance of forested regions depends on inputs in form of C sequestered by live components during growth and outputs in form of C emitted from dead components through decomposition and combustion. Live trees in many forest ecosystems represent the largest aboveground C pool and the dynamics of this pool, as controlled by growth and mortality, have been extensively studied. In contrast, few have examined either the post-
disturbance fate of CWD C or assessed C storage potential of salvaged biomass despite the occurrence of multiple recent large-scale
disturbance events.
Biomass and C stores and their uncertainty were estimated in the Temperate and the Boreal ecoregions of Coastal Alaska using the empirical data from the Forest Inventory and Analysis (FIA) program, literature data, and modeling using standard methods employed by the FIA program. The average aboveground woody live (218.9±4.6 Mg/ha) and log (28.1±1.8 Mg/ha) biomass in the Temperate ecoregion were among the lowest in the Pacific Northwest, whereas snag biomass (30.5±1.0 Mg/ha) was among the highest. In the Boreal ecoregion, CWD biomass comprised almost 50% of the regional aboveground woody store (76.7±3.8 Mg/ha) with bark beetle damaged stands containing 82% of the total CWD biomass. In contrast, in the Temperate ecoregion, CWD comprised 20% of the regional aboveground woody store (277.5 ±5.4 Mg/ha) with 76% of total CWD biomass in undisturbed stands. Total C stores estimates in Coastal Alaska ranged between 1523.6 and 1892.8 Tg with the highest contribution from soils and the largest potential reductions in uncertainty related to the tree and soils C pools.
The impact of a large-scale spruce bark beetle (SBB) outbreak on aboveground dead wood C dynamics on the Kenai Peninsula was modeled utilizing data from the FIA program and CWD decomposition rate-constants from a chronosequence and decomposition-vectors analysis. Decomposition rate-constants from the chronosequence ranged between -0.015 yr⁻¹ and -0.022 yr⁻¹ for logs and -0.003 yr⁻¹ and +0.002 yr⁻¹ for snags. Decomposition rate-constants from the decomposition-vectors ranged…
Advisors/Committee Members: Harmon, Mark E. (advisor), Krankina, Olga N. (committee member).
Subjects/Keywords: disturbance; Carbon sequestration – Alaska – Pacific Coast
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APA (6th Edition):
Yatskov, M. A. (2016). The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/58561
Chicago Manual of Style (16th Edition):
Yatskov, Mikhail A. “The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska.” 2016. Doctoral Dissertation, Oregon State University. Accessed January 24, 2021.
http://hdl.handle.net/1957/58561.
MLA Handbook (7th Edition):
Yatskov, Mikhail A. “The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska.” 2016. Web. 24 Jan 2021.
Vancouver:
Yatskov MA. The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska. [Internet] [Doctoral dissertation]. Oregon State University; 2016. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/1957/58561.
Council of Science Editors:
Yatskov MA. The Impact of Disturbance on Carbon Stores and Dynamics in Forests of Coastal Alaska. [Doctoral Dissertation]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/58561
University of Helsinki
28.
Kilpinen, Satu.
Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia.
Degree: Department of Forest Sciences; Helsingfors universitet, Agrikultur- och forstvetenskapliga fakulteten, Institutionen för skogsvetenskaper, 2018, University of Helsinki
URL: http://hdl.handle.net/10138/236044
► Kasvava ihmistoiminta on vähentänyt luonnonmetsien määrää radikaalisti viimeisten vuosikymmenten aikana. Vaikka luonnonmetsiä on tutkittu aktiivisesti 1990-luvulta alkaen, tutkimustiedossa on vielä paljon puutteita, erityisesti eteläboreaalisten metsien…
(more)
▼ Kasvava ihmistoiminta on vähentänyt luonnonmetsien määrää radikaalisti viimeisten vuosikymmenten aikana. Vaikka luonnonmetsiä on tutkittu aktiivisesti 1990-luvulta alkaen, tutkimustiedossa on vielä paljon puutteita, erityisesti eteläboreaalisten metsien ja lehti- ja sekametsien osalta. Luonnonmetsätutkimuksesta saatua tietoa voidaan hyödyntää esimerkiksi vertailukohtana ihmisen toiminnan vaikutuksia arvioitaessa tai kestävän metsätalouden suunnittelussa. Luontaista häiriödynamiikkaa voidaan käyttää mallina metsänhoidossa, esimerkiksi ennallistamisen tai talousmetsien hoitotoimenpiteiden suunnittelussa. Taustalla on tällöin oletus, että luontainen häiriödynamiikka (tai sen emulointi) auttaa säilyttämään paremmin sellaisia metsän ominaisuuksia tai arvoja, kuten biodiversiteetti ja resilienssi.
Tämän tutkimuksen tarkoituksena oli selvittää häiriöiden historiallista vaihtelua ja vaikutusta metsän rakenteeseen neljällä eteläboreaalisen metsän kohteella Venäjän Karjalassa. Tavoitteena oli määrittää häiriöiden voimakkuus (intensiteetti), frekvenssi ja alueellinen mittakaava. Lisäksi tarkasteltiin mahdollista yhteyttä häiriöiden laadun ja metsän ominaisuuksien (metsätyypin ja puulajien) välillä.
Neljälle tutkimuskohteelle perustettiin yhteensä 14 koealaa, joilta mitattiin puustotunnukset ja kairattiin lustonäytteet yhteensä 140:stä koepuusta. Lustonäytteet analysoitiin dendroekologisin menetelmin. Häiriöitä ilmentävistä, latvuskerrokseen päässeistä (vapautuneista) ja aukkoon syntyneistä puista muodostettiin häiriökronologiat kohteille ja koealoille.
Tutkituista kohteista kaksi oli kuusivaltaisia, yksi mäntyvaltainen ja yksi sekametsä. Kolme kohteista oli eri-ikäisrakenteisia ja männikkö oli melko tasaikäinen (80-100v). Häiriöissä esiintyi suurta ajallista ja alueellista vaihtelua kohteiden ja koealojen välillä. Kaikilla kohteilla esiintyi viimeisten kahden tai kolmen vuosisadan aikana voimakkuudeltaan vaihtelevia häiriöitä matalasta (0-20%) keskisuureen (20-40%) tai matalasta suureen (>40%). Kaikilla kohteilla esiintyi metsikkötason häiriöitä, mutta todisteita alueellisen tason häiriöistä ei löytynyt. Metsän ominaisuuksien ja häiriöiden laadun välillä ei havaittu selvää yhteyttä.
Häiriödynamiikoissa esiintyi huomattavaa vaihtelua frekvenssin, intensiteetin ja vaihteluvälin suhteen. Tulokset korostavat metsien rakenteen ja häiriöhistorian luonnollista vaihtelua. Tulokset tukevat aiempaa häiriötutkimusta Venäjän Karjalasta ja antavat arvokasta lisätietoa eteläboreaalisten metsien häiriödynamiikasta.
Increasing human impact has radically changed the forest structure and depleted the area of natural forests in many regions. In spite of active natural forest research during the last decades, the current knowledge on the southern boreal region, deciduous and mixed forests fall short. The knowledge on natural forests can be utilized for planning sustainable forestry, conservation measures or in environmental impact assessments regarding human influence on forests. The natural disturbance dynamics can be used as a model in…
Subjects/Keywords: disturbance dynamics; dendrochronology; disturbance history; dendrochronology; Metsien ekologia ja käyttö; Forest Ecology and Management; skoglig ekologi och resurshushållning; disturbance dynamics; dendrochronology; disturbance history; dendrochronology
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APA ·
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Manager
APA (6th Edition):
Kilpinen, S. (2018). Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia. (Masters Thesis). University of Helsinki. Retrieved from http://hdl.handle.net/10138/236044
Chicago Manual of Style (16th Edition):
Kilpinen, Satu. “Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia.” 2018. Masters Thesis, University of Helsinki. Accessed January 24, 2021.
http://hdl.handle.net/10138/236044.
MLA Handbook (7th Edition):
Kilpinen, Satu. “Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia.” 2018. Web. 24 Jan 2021.
Vancouver:
Kilpinen S. Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia. [Internet] [Masters thesis]. University of Helsinki; 2018. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10138/236044.
Council of Science Editors:
Kilpinen S. Variability and Mixed-Severity Disturbances Characterize Unmanaged Southern Boreal Forests in Russian Karelia. [Masters Thesis]. University of Helsinki; 2018. Available from: http://hdl.handle.net/10138/236044
Cornell University
29.
Ayana, Essayas Kaba.
Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin.
Degree: PhD, Agricultural and Biological Engineering, 2013, Cornell University
URL: http://hdl.handle.net/1813/33768
► Ground based water resources monitoring systems are often difficult to maintain consistently in developing countries. The decline in the number of stations, data quality and…
(more)
▼ Ground based water resources monitoring systems are often difficult to maintain consistently in developing countries. The decline in the number of stations, data quality and changes in the data holding policy has made water resources data less reliable for use in operational purposes. The objective of this dissertation is, therefore, to evaluate the utility of existing freely available remotely sensed images to monitor water resource systems. In this dissertation Moderate Resolution Imaging Spectroradiometer (MODIS) images were evaluated on the basis of their capability to (1) measure total suspended solid (TSS) and turbidity and generate historical TSS data, (2) estimate the water storage variation of Lake Tana and (3) monitor the state of biomass in the upper Blue Nile basin . The usability of historical TSS data in hydrologic modeling is also tested. Lake water samples were collected concurrent with the satellite overpass over the lake at the entry location of Gumera River, a major tributary to the lake. Reflectance in the red and near infrared (NIR) 250 m-pixel images taken on sampling days were correlated and validated using measured TSS and turbidity. The validated correlations were applied to the ten year image archive of MODIS to generate a 10-year TSS time series for the lake. In addition, MODIS images of the years 2002 - 2003, where the lake level variation was at its minimum, were used to generate the lake near-shore bathymetric model. The new near-shore bathymetric model reproduced water level measurements with a better accuracy than the existing bathymetric model of the lake. The usability of the TSS data was tested by initializing a hydrologic model for the Gumera watershed using the Soil and Water Assessment Tool (SWAT). The ten year TSS data generated were used to calibrate the model. The model was capable of predicting the monthly TSS variation. The potential of MODIS images in monitoring biomass recovery was also assessed at river basin scale. The enhanced vegetation index (EVI) - land surface temperature (LST) relation is used to map the trend in the
disturbance of plantations put in place as conservation measures. In this dissertation the potential of satellite imagery as a data gap filling alternative to ground based monitoring systems in data scarce regions is tested.
Advisors/Committee Members: Steenhuis, Tammo S (chair), Brutsaert, Wilfried H (committee member), Philpot, William Douglas (committee member).
Subjects/Keywords: MODIS; Disturbance Index; Lake Tana; SWAT
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APA (6th Edition):
Ayana, E. K. (2013). Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33768
Chicago Manual of Style (16th Edition):
Ayana, Essayas Kaba. “Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin.” 2013. Doctoral Dissertation, Cornell University. Accessed January 24, 2021.
http://hdl.handle.net/1813/33768.
MLA Handbook (7th Edition):
Ayana, Essayas Kaba. “Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin.” 2013. Web. 24 Jan 2021.
Vancouver:
Ayana EK. Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/1813/33768.
Council of Science Editors:
Ayana EK. Remote Sensing Tools For Land And Water Management In Data Scarce Blue Nile Basin. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33768
Colorado State University
30.
Dudley, Megan.
Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors.
Degree: MS(M.S.), Bioagricultural Sciences and Pest Management, 2011, Colorado State University
URL: http://hdl.handle.net/10217/70685
► Quaking aspen (Populus tremuloides Michx) is a deciduous hardwood tree widely distributed throughout North America. In Colorado, quaking aspen is found on a wide variety…
(more)
▼ Quaking aspen (Populus tremuloides Michx) is a deciduous hardwood tree widely distributed throughout North America. In Colorado, quaking aspen is found on a wide variety of sites, from the lower-elevation foothills of the eastern edge of the Rockies to moderate- and high- elevation montane sites throughout the Rocky Mountains. Aspen dieback has been documented throughout western North America over the past decade, resulting in stands that have either elevated proportions of overstory mortality or thin crowns, or both. Stands experiencing dieback may or may not produce regeneration cohorts. In this study, we surveyed aspen in the north-western corner of Colorado on the White River and Routt national forests, along the front range of Colorado on the Pike-San Isabel national forests, and in the south-central region of Wyoming on the Medicine Bow national forest during 2009 - 2010. We established 573 random roadside survey plots in stands that contained at least 50% aspen cover type. From these random plots, we found average standing aspen tree mortality ranged from 3.3 to 23.7 % on the four national forests and 11% on the east side of the continental divide and 4 % on the west side. The roadside plot data suggests that Colorado's aspen on these four national forests overall were healthy; mortality rates among aspen were fairly low (~3 - 8%) among all stems, and average percent live crown among adults was high (~85 - 90%), in spite of nearly ubiquitous presence of disease (~97 - 99%) and high incidence of insect damage (~50 - 75%). We also established 98 aspen stand assessment plots with half of the plots in damaged stands, as defined by U.S.D.A. Forest Service aerial detection surveys (ADS), and half in healthy aspen stands. Damaged stands were defined as those stands with (1) thinning crowns among at least 25% of adult aspen, (2) stands with moderate (<50% of stems) levels of overstory mortality, or (3) stands with high (>50% of stems) levels of overstory mortality. Healthy aspen stands were defined as having (1) a maximum mortality rate of 5 - 7% among all aspen, and/or (2) more than 75% of adult aspen with full crowns. Adult aspen in damaged stands tended to be less vigorous, based a health score index from 1 to 5, with higher scores indicating less healthy conditions (where 1=0-25% damage; 2 = 25-50% damage; 3 = >50% damage; 4 = recent dead; 5 = >5 years dead). Health scores averaged 1.7 in healthy stands, compared to 2.3 in damaged stands. Saplings in damaged stands tended to be healthier with a score of 1.7, compared to 2.2 in healthy stands. Further, there was no difference in the proportion live or total numbers of saplings per hectare between healthy and damaged stands. The prevalence of damaging organisms, such as Cytospora canker (20% in damaged, 13% in healthy), wood-boring insects (27% in damaged, 10% in healthy), and aspen bark beetles (16% in damaged, 7% in healthy) was considerably greater among damaged stands. Site conditions also influenced the prevalence of some of these damage agents: bark beetles…
Advisors/Committee Members: Jacobi, William R. (advisor), Tisserat, Ned A. (committee member), Negron, Jose (committee member), Martin, Patrick H. (committee member).
Subjects/Keywords: aspen; decline; dieback; disturbance; SAD; Populus tremuloides
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APA (6th Edition):
Dudley, M. (2011). Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/70685
Chicago Manual of Style (16th Edition):
Dudley, Megan. “Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors.” 2011. Masters Thesis, Colorado State University. Accessed January 24, 2021.
http://hdl.handle.net/10217/70685.
MLA Handbook (7th Edition):
Dudley, Megan. “Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors.” 2011. Web. 24 Jan 2021.
Vancouver:
Dudley M. Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors. [Internet] [Masters thesis]. Colorado State University; 2011. [cited 2021 Jan 24].
Available from: http://hdl.handle.net/10217/70685.
Council of Science Editors:
Dudley M. Aspen mortality in the Colorado and southern Wyoming Rocky Mountains: extent, severity, and causal factors. [Masters Thesis]. Colorado State University; 2011. Available from: http://hdl.handle.net/10217/70685
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Open Access Theses and Dissertations