SPATIAL AND TEMPORAL VARIATION IN MERCURY CONTAMINATION OF SEABIRDS IN THE NORTH-SEA

Citation
Rw. Furness et al., SPATIAL AND TEMPORAL VARIATION IN MERCURY CONTAMINATION OF SEABIRDS IN THE NORTH-SEA, Helgolander Meeresuntersuchungen, 49(1-4), 1995, pp. 605-615
Citations number
43
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Oceanografhy,"Marine & Freshwater Biology
Journal title
ISSN journal
0174-3597
Volume
49
Issue
1-4
Year of publication
1995
Pages
605 - 615
Database
ISI
SICI code
0174-3597(1995)49:1-4<605:SATVIM>2.0.ZU;2-F
Abstract
Once the moult patterns have been taken into account, feather methylme rcury levels can be used to accurately measure the mercury burdens of seabirds. We used body feathers from live seabirds and from museum col lections to examine geographical and temporal patterns of mercury cont amination in the North Sea. This approach identifies an increase in me rcury concentrations in seabirds of the German North Sea coast during the last 100 years, especially high levels during the 1940s, and reduc ed contamination in the last few years. Comparisons among populations suggest that some increases in mercury levels are predominantly due to local pollution inputs, as on the German coast, while in other areas deposition from jet stream circulation of global contamination may be the major contributor. Mercury levels are far higher in seabirds from the German North Sea coast than in populations from the north and west North Sea or from most areas of the North Atlantic. We advocate the u se of museum collections of birds for studies of long-term changes in levels of mercury contamination.