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Watershed Nitrogen Transport, Retention, and Fate in Dryland and Urban Ecosystems


Abstract Nitrogen is an essential, often limiting, element for biological growth that can act as a pollutant if present in excess. Nitrogen is primarily transported by water from uplands to streams and eventually to recipient lakes, estuaries, and wetlands, but can be modulated by biological uptake and transformation along these flowpaths. As a result, nitrogen can accumulate in aquatic ecosystems if supply is high or if biological retention is low. Dryland and urban ecosystems offer interesting contrasts in water supply, which limits transport and biological activity in drylands, and nitrogen supply that increases with human activity. In my dissertation, I ask: What is the relative balance among nitrogen retention, removal, and transport processes ... (more)
Created Date 2019
Contributor Handler, Amalia (Author) / Grimm, Nancy B (Advisor) / Helton, Ashley M (Committee member) / Hartnett, Hilairy E (Committee member) / Ruddell, Benjamin L (Committee member) / Arizona State University (Publisher)
Subject Ecology / Environmental science / Drylands / Nitrogen cycling / Streams / Temporary streams / Watersheds / Wetlands
Type Doctoral Dissertation
Extent 165 pages
Language English
Copyright
Note Doctoral Dissertation Biology 2019
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis