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Biophysical controls on organic carbon fluxes in fluvial networks.pdf
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Metabolism of terrestrial organic carbon in freshwater ecosystems is responsible for a large amount of carbon dioxide outgassing to the atmosphere, in contradiction to the conventional wisdom that terrestrial organic carbon is recalcitrant and contributes little to the support of aquatic metabolism. Here, we combine recent findings from geophysics, microbial ecology and organic geochemistry to show geophysical opportunity and microbial capacity to enhance the net heterotrophy in streams, rivers and estuaries. We identify hydrological storage and retention zones that extend the residence time of organic carbon during downstream transport as geophysical opportunities for microorganisms to develop as attached biofilms or suspended aggregates, and to metabolize organic carbon for energy and growth. We consider fluvial networks as meta-ecosystems to include the acclimation of microbial communities in downstream ecosystems that enable them to exploit energy that escapes from upstream ecosystems, thereby increasing the overall energy utilization at the network level.
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Resources
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Climate Science Documents
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Watershed Decision Tool Webinar Series (UPDATE)
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The USFWS Southeast Region Office is sponsoring a webinar series on Watershed Decision Tools with the aim of promoting awareness of the many various watershed prioritization tools available to assist in planning conservation actions and fostering discussion about how each tool is or could be used, applicability and limitations, and possible future improvements and needs. We currently have 4 remaining webinars scheduled and hope to add more. We have switched to a new webex platform to enable recording and archiving of webinar presentations, so login details for the series has changed.
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News & Events
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Watershed Decision Tool Webinar Series (UPDATE)
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Assessing Future Energy Development across the Appalachian LCC. Final Report
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In this study funded by the Appalachian LCC, The Nature Conservancy assessed current and future energy development across the entire region. The research combined multiple layers of data on energy development trends and important natural resource and ecosystem services to give a comprehensive picture of what future energy development could look like in the Appalachians. It also shows where likely energy development areas will intersect with other significant values like intact forests, important streams, and vital ecological services such as drinking water supplies.
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Tools & Resources
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Assessing Future Energy Development
