Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"anthropogenic stressors"”.
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Responses of wild freshwater fish to anthropogenic stressors in the Waikato River of New Zealand
To assess anthropogenic impacts of point-source and diffuse discharges on fish populations of the Waikato River, compare responses to different discharges and identify potential sentinel fish species, we sampled wild populations of brown bullhead catfish (Ameiurus nebulosus, (LeSueur, 1819)), …
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Individual And Population Responses Of The Caribbean Sponge, Aplysina Cauliformis, To Natural And Anthropogenic Stressors
… are under increasing threat from a diversity of stressors. These reefs have undergone a phase shift from coral-dominated to algal-dominated ecosystems, and in many cases other functional groups such as sponges are now the predominant organisms on many reefs. This dissertation investigated the …
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Acidification and Climate Warming: Understanding the Impact of Multiple Anthropogenic Stressors on Adirondack (NY, USA) Lakes
… data, and 2) the influence of multiple stressors on recovering lakes. This thesis addresses both difficulties by applying paleolimnological techniques within a regional reference lake framework. Using a set of stringent selection criteria, 31 lakes protected from acidification, …
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The impacts of environmental and anthropogenic stressors on largemouth bass: an integration of field and laboratory studies
Several environmental stressors can impact the physiology and survival of fishes. Fish experience natural fluctuations in temperature and dissolved oxygen, but variations in these parameters due to anthropogenic sources are typically greater in magnitude and duration. Changes in temperature and …
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The effects of natural and anthropogenic stressors on the stress response and tissue-level response in teleost fish
… studying the biological impacts of natural and anthropogenic stressors in biota. By measuring fluctuations in multiple physiological characteristics, we are able to predict the impact that exogenous stressors may have on organismal health. Laboratory studies are useful in studying the effects of …
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Trans-boundary river basins: a discourse on water scarcity, conflict, and water resource management.
… how water is allocated among competing users. Anthropogenic stressors that induce water scarcity and the geopolitical mechanisms of conflict are studied. A discourse on the creation and functional extent of global and localized water ethics is investigated, emphasizing the importance of …
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Landscape and Mechanistic Approaches to Describing Milkweed Habitat and Drought Tolerance and the Implications for Western Monarch Butterflies
… pollinator floral resources in the face of anthropogenic stressors. We utilized an unmanned aerial vehicle (UAV) remote sensing method along with the machine learning model you only look once (YOLO) to map floral habitat. We focused on detecting two milkweed species, narrowleaf milkweed …
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Impacts of Climate Change and Multiple Stressors on Water Levels and Phytoplankton in Small Temperate Lakes Within the Great Lakes Region Over Three Decades
… the impacts of climate change and additional anthropogenic stressors on water quantity and quality in two study areas with minimal anthropogenic disturbance within the Great Lakes region. Between 1984 and 2014, water levels dropped by an average of 50 cm in northern Wisconsin lakes. We found …
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Long-Term Warming And The Size And Phenology Of Long Island Sound Plankton
… with decades of eutrophication and other anthropogenic stressors, the impact of climate change on planktonic communities can be difficult to detect. A time-series of monthly surface water temperatures in the Central Basin of Long Island Sound (LIS) from the late 1940s until 2012 indicates …
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Unraveling the mystery of leaf reddening in seagrasses
… the world are declining due to natural and anthropogenic stressors, including global climate change. Recently, more attention has been given to identifying responses that offer resistance to stressors so that researchers can better manage seagrasses for resilience to environmental change. …
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Marine stressor and receptor interactions: A new approach to incorporate multiple stressor impacts into marine spatial management
… are subject to ongoing and increasing levels of anthropogenic stress which urgently needs to be quantified and strategically managed to balance socioeconomic resource interests. To support a more holistic approach to Marine Spatial Planning and better inform management decisions, spatial …
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Effects of anthropogenic change on animal cognition and emotion
… are less studied. In this thesis, I argue that anthropogenic change impacts animals’ mental states, with implications for both individuals (welfare) and populations (conservation). My first experiment explores the transition from keeping dairy cattle at pasture to housing them indoors full-time. …
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A Test of Rad Capture Sequencing on Ethanol-Preserved Centennial and Contemporary Specimens of Philippine Fishes
… in different time scales can reveal how anthropogenic stressors affect natural populations and can improve the success of conservation strategies. The purpose of the Philippines Partnerships for International Research and Education (PIRE) project is to examine levels of genetic change …
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Effects of Turbidity on Anti-Predator Response and Foraging Behavior in the Fountain Darter, Etheostoma fonticola
Turbidity resulting from anthropogenic stressors poses a significant threat to freshwater systems and is occurring on a global scale. The pervasive impacts of turbidity include degraded visual ability resulting in altered animal behavior. Anti-predator response and successful foraging ability, both …
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Molecular Characterization of Stress Response in Western Honey Bee (Apis mellifera)
… ecosystems. However, they face various stressors such as pesticides, pathogens, habitat loss, and climate change. Extensive research has been conducted to understand how bees respond to these stressors. Scientists have discovered that honey bees exhibit complex physiological and …
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Upland Migration of Coastal Marshes as a Response to Sea Level Rise and Fire Management: Past, Present, and Predicted
… they are under threat due to natural and anthropogenic stressors, such as sea level rise (SLR). SLR can cause marshes to drown, converting them to open water. Marshes can respond to SLR through landward migration when suitable habitat is available. My research focuses on the landward …
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Global Conservation Status of Croaker and Drum (Family: Sciaenidae) and Role of the Maw Trade
… characteristics increase their susceptibility to anthropogenic stressors. Despite being ecologically and economically important, data regarding species’ population status and ecology are limited. In this study, I evaluated extinction risk for the 286 valid sciaenid species using the International …
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Understanding the relationship between agricultural nutrients NPS, land management, and climate using distributed hydrologic models
… of the watershed response to natural and anthropogenic stressors like changing climate and changes in land management scenarios, a modeling framework that allows the conceptualization of physically-based hydrologic and transport processes should be adopted to provide reliable predictions …
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Analysis of QA/QC Protocols and Value of Data to the Development of Reference Criteria in the Georgia Ecoregions Project
… as well as the variability of the influences anthropogenic stressors. Calculations of variance within the biological parameters measured are necessary for identifying the effects of measurement errors and/or inherent differences between sampling sites in relation to the overall variance of a …
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Simulation and assessment of highly altered hydrologic system responses to anthropogenic and natural stressors at the watershed scale
Environmental stressors account for human activities and natural processes that provoke modification of an ecosystem and its behavior. These stressors are chemical, physical, or biological in nature and can have short- and long-term impacts on the ecosystem (EPA, 2017b). Watershed Management …
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