Document Detail


Long-term trends in organochlorine and mercury residues in some predatory birds in Britain.
MedLine Citation:
PMID:  15091899     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Residue levels of organochlorine pesticides (HEOD, DDE), polychlorinated biphenyls (PCBs) and mercury (Hg) in the livers of five predatory bird species were monitored in Britain over a 28-year (1963-1990) period. Of two raptor species, sparrowhawks contained higher levels of most chemicals than did kestrels. Among three fish-eaters, herons and kingfishers contained the highest levels of DDE and HEOD, while herons and great-crested grebes contained the highest levels of PCBs and mercury. Species differences were related partly to diet and habitat. In sparrowhawks and kestrels, residues of HEOD and DDE were higher in eastern, arable districts than elsewhere, especially in the 1960s and 1970s. In the fish-eaters, similar regional differences in residue levels were apparent in herons, especially in the 1970s, but not in the other species, for which samples were smaller. Over the 28 years, most species showed significant downward trends in HEOD, DDE and Hg levels, but only two fish-eaters showed significant declines in PCB levels. The downward trends in DDE and HEOD followed successive restrictions in the use of organochlorine pesticides, and were accompanied by recoveries in the populations and breeding success of affected species. Downward trends in mercury were associated with reductions in both agricultural use and industrial emissions.
Authors:
I Newton; I Wyllie; A Asher
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  79     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  1993  
Date Detail:
Created Date:  2004-04-19     Completed Date:  2005-01-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  143-51     Citation Subset:  -    
Affiliation:
Institute of Terrestrial Ecology, Monks Wood Experimental Station, Abbots Ripton, Huntingdon, Cambridgeshire, PE17 2LS, UK.
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