SPATIO-TEMPORAL EVIDENCE OF ANTHROPOGENIC NITROGEN IN FLORIDA WATERS USING STABLE ISOTOPE ANALYSIS OF MANATEE BONES

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SPATIO-TEMPORAL EVIDENCE OF ANTHROPOGENIC NITROGEN IN FLORIDA WATERS USING STABLE ISOTOPE ANALYSIS OF MANATEE BONES

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dc.contributor.advisor Kim, Kiho en_US
dc.contributor.author Bacalan, Vince en_US
dc.contributor.other MacAvoy, Stephen en_US
dc.contributor.other Baker, David M. en_US
dc.date.accessioned 2012-10-03T15:16:18Z
dc.date.available 2012-10-03T15:16:18Z
dc.date.created 2012 en_US
dc.date.issued 2012-10-03
dc.identifier.other Bacalan_american_0008N_10313 en_US
dc.identifier.uri http://hdl.handle.net/1961/12368
dc.description Degree awarded: M.S. Biology. American University en_US
dc.description.abstract Nutrient pollution from human activities leads to coastal eutrophication and degradation of critical habitat for threatened species, including the Florida manatees (<italic>Trichechus manatus latirostris</italic>). Recovery of these damaged habitats relies on water quality assessments over a long period of time. With the absence of long-term diet and water quality data, manatee bones will serve as proxies for environmental reconstruction. Isotopic composition of skeletal nitrogen (N) reflects plants that manatees consume and the predominant N source driving primary productivity within the ecosystem. Sewage, as a consequence of rapid coastal development, is isotopically distinct from natural sources of N. Thus, &#948;15N values are predicted to increase over time and would be highest in densely-populated areas. Collagen in manatee bones were analyzed from 173 necropsied individuals since 1975. Mean &#948;15N values have decreased from 8.8 / in the 1970s to 6.3 / in 2010 mainly because fertilizer is the source of depleted N. Coastal and regional mean &#948;15N values were very high, suggesting a mixing of enriched N sources that include sewage and atmospheric deposition. en_US
dc.format.extent 72 p. en_US
dc.format.mimetype application/pdf en_US
dc.publisher American University en_US
dc.subject Biology en_US
dc.subject Ecology en_US
dc.subject Environmental science en_US
dc.subject.other &#948;13C en_US
dc.subject.other &#948;15N en_US
dc.subject.other Eutrophication en_US
dc.subject.other Florida Manatee en_US
dc.subject.other N Pollution en_US
dc.subject.other Stable Isotopes en_US
dc.title SPATIO-TEMPORAL EVIDENCE OF ANTHROPOGENIC NITROGEN IN FLORIDA WATERS USING STABLE ISOTOPE ANALYSIS OF MANATEE BONES en_US
dc.type Text en_US
dc.type Dissertation en_US


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