| one publication added to basket [53880] | Long-term changes in oil pollution off the Belgian coast: evidence from beached bird monitoring
Seys, J.; Offringa, H.; Meire, P.; Van Waeyenberge, J.; Kuijken, E. (2002). Long-term changes in oil pollution off the Belgian coast: evidence from beached bird monitoring, in: Seys, J. (2001). Het gebruik van zee- en kustvogelgegevens ter ondersteuning van het beleid en beheer van de Belgische kustwateren. pp. 97-107 In: Seys, J. (2001). Sea- and coastal bird data as tools in the policy and management of Belgian marine waters = Het gebruik van zee- en kustvogelgegevens ter ondersteuning van het beleid en beheer van de Belgische kustwateren. PhD Thesis. Universiteit Gent: Gent. 133 + LXIX appendices pp., more |
| Keywords | Aquatic organisms > Marine organisms > Aquatic birds > Marine birds
Pollution > Oil pollution
Surveys
Temporal variations
ANE, North Sea [Marine Regions]
Marine/Coastal |
| Authors | | Top | - Seys, J., more
- Offringa, H.
- Meire, P., more
| - Van Waeyenberge, J., more
- Kuijken, E.
| |
| Abstract | Trends in oil pollution in the southernmost (Belgian) part of the North Sea were analysed using a dataset of 37 years (1962-99) of annual national beached bird surveys conducted in February each year. The most abundant seabird groups represented in the beached birds were auks (31 %), gulls (28%), scoters (17%) and Kittiwake (9%). Oil rates of most bird species/taxa indicate a decline in oil pollution, though only Larus-gulls, Common Guillemot and Razorbill show significant reductions. The slope in the linear decreasing trend is steeper in inshore and midshore species, than in pelagic species. A power analysis of the results demonstrated that statistically significant trends in annual indices would be expected within 17 years for Razorbill, 29 years for Larus-gulls and 31 years for Common Guillemot. For other species/taxa, at least 50 years of surveying would be required. Long-term oil pollution monitoring in Belgium should be continued with a major focus on a set of abundant bird taxa, sensitive to oil-pollution and occurring in various marine habitats. Most appropriate for this purpose are grebes (inshore), Larus-gulls, Common Guillemot and Razorbill (midshore) and Kittiwake and Fulmar (offshore). |
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