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 5 of 5 for “"Human perturbations"”.
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Role of the thermodynamic regime in ecosystem self-organization and its response to human perturbations
As the rate and scale of human activities increase throughout the world, the structure and function of Earth systems are consequently altered. Human-induced direct and indirect perturbations, such as changes in atmospheric temperature or the burning or logging of vegetation, alter the thermodynamic …
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Understanding ocean iron dynamics and impacts on marine ecosystems
… increased over the last decades partly due to human activities, which can significantly alter marine ecosystems. Thus, a comprehensive understanding of how the ocean Fe cycling operates and how it will respond to human perturbations is urgently needed. In this work, I first significantly …
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Demography and ecology of a declining endemic: The Olympic marmot
… large parks are increasingly affected by outside perturbations. The Olympic marmots (Marmota olympus) are ground-dwelling squirrel that inhabit high-elevation meadows almost exclusively within Olympic National Park Despite this protection, anecdotal reports in the 1990's of disappearances from …
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Demography and ecology of a declining endemic: The Olympic marmot
… large parks are increasingly affected by outside perturbations. The Olympic marmots (Marmota olympus) are ground-dwelling squirrel that inhabit high-elevation meadows almost exclusively within Olympic National Park Despite this protection, anecdotal reports in the 1990's of disappearances from …
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Characterization of reactive and non reactive trace gas fluxes in and above soil
… breathe) is dinitrogen. Over the last century, human activities have dramatically increased emissions and removal of nitrogen to the global atmosphere by as much as three to five fold. Nitrous oxide is the fourth largest single contributor to positive radiative forcing, and serves as the only …