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.
Results
Showing 1 to 8 of 8 for “"ecosystem disturbance"”.
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Identifying ecological differentiation in microbial communities across taxonomic scales
… dictates how microbial community diversity and ecosystem functioning respond to environmental change. In this body of work, I have used sequencing-based techniques to identify ecological differentiation at taxonomic scales ranging from a whole bacterial community to a single population of …
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Effect of tree mortality on biogeochemical response after mountain pine beetle forest infestation, The
… terrestrial biogeochemical responses to this ecosystem disturbance are unclear, we hypothesized that a threshold of localized tree mortality must be exceeded before disruption of carbon and nitrogen biogeochemical cycling is observed. In order to isolate the compensatory effects of proximal …
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The Wandering Mussels: Analyzing the Ecological Impact of Dreissenid Mollusks Across Spatial and Temporal Scales in Eastern Ontario Using Environmental DNA
Biological invasions profoundly disrupt aquatic ecosystems, yet predicting their long-term trajectories remains challenging. To address this, I propose the Alien Succession Hypothesis (ASH), a novel theoretical framework conceptualizing biological invasions as a form of ecological succession …
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Nutritional condition and stress response of fishes along a gradient of habitat quality in the St. Lawrence River: physiological consequences of anthropogenic habitat degradation
… metrics are rarely evaluated in the context of ecosystem disturbance. Using physiological sampling, we can examine the effects of land use on the health of resident fishes, and improve our understanding of the mechanisms causing population declines. Therefore, the goal of my thesis is to define …
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Roots as agents of soil change over time and as mediators of humanity’s imprint on Earth’s critical zone
… C for nutrient strategies across diverse forest ecosystems and demonstrate that, if left unperturbed, rooting systems increasingly tap into deeply distributed, mineral bound nutrient stocks over time to sustain forest nutrition. We even observed this effect in highly weathered soils where we …
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Diversity and species overlap of Botryosphaeriaceae on some trees of Anacardiaceae in disturbed and undisturbed ecosystems in South Africa
… once introduced into new areas, and how ecosystem disturbances through human activities influence species diversity and distribution of fungi in the Botryosphaeriaceae. The current study explored Botryosphaeriaceae species diversity on native and non-native tree species of Anacardiaceae …
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Characterizing Impacts of and Recovery from Surface Coal Mining in Appalachian Forested Landscapes Using Landsat Imagery
… from the other prevalent forest-replacing disturbances through analysis of an interannual chronosequence of Landsat images. Disturbances were classified using descriptors of the disturbance/recovery trajectories: disturbance minimum, recovery slope and recovery maximum. Three vegetation …
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CLIMATE CHANGE, SHIFTS IN TROPICAL STORM REGIMES AND TRIADICA SEBIFERA INVASION IN COASTAL MISSISSIPPI, UNITED STATES
… is predicted to affect timing and severity of disturbance events (e.g., fire, drought, hurricanes, wind storms, and inundation), but the extent of these disturbance events and their impacts on natural ecosystems may vary regionally. Rising sea level, increased frequency and intensity of …