Document Detail


Stable isotope dynamics of nitrogen sewage effluent uptake in a semi-arid wetland.
MedLine Citation:
PMID:  16213073     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Our objectives were to determine (1) how much N is transferred into the food web via plants from a wetland receiving not only inputs of treated sewage effluent, but also containing contaminants such as polychlorinated biphenyls (PCBs), (2) how birds, as consumers, utilize exogenous N and uptake PCBs in relation to the food web of the wetlands, (3) the feasibility of using isotopic analysis in estimating trophic levels in a semi-arid system. Our results demonstrate that there is very high spatial variability in the N isotopic composition of primary producers. Birds had lower variability in delta15N, despite feeding at multiple trophic levels. In very high spatial variability in delta15N of primary producers, it is difficult to use N isotope techniques to define trophic levels relevant to the bioaccumulation of organic pollutants, but it is possible to track the flow of exogenous N through the food web.
Authors:
Jeanne M Fair; Jeffrey M Heikoop
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2005-10-04
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  140     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-02-28     Completed Date:  2006-10-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  500-5     Citation Subset:  IM    
Affiliation:
Los Alamos National Laboratory, Atmospheric, Climate, and Environmental Dynamics, MS J495, Los Alamos, NM 87545, USA. jmfair@lanl.gov
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MeSH Terms
Descriptor/Qualifier:
Animals
Arthropods / chemistry
Birds / blood
Environmental Pollutants / pharmacokinetics*
Food Chain
Nitrogen / chemistry*
Nitrogen Isotopes / chemistry
Plants / chemistry
Polychlorinated Biphenyls / blood
Sewage / chemistry*
Soil Pollutants / pharmacokinetics
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Nitrogen Isotopes; 0/Polychlorinated Biphenyls; 0/Sewage; 0/Soil Pollutants; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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