Fig 1 - uploaded by Cornelis Jan Camphuysen
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Long-term trends in densities of sea-and waterbirds (n per km of beach surveyed on a ln scale; all species combined on all surveyed North Sea shorelines) washing ashore in The Netherlands ranged from a maximum of 10.7 birds km -1 (2.4 on the ln-scale) in the severe of winter 1978/79 to a minimum of 0.48 birds km -1 (-0.7) in winter 2014/15
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This is the annual update for OSPAR of the beached bird survey (BBS) results in The Netherlands (winter 2014/15). The Dutch BBS provides data for OSPAR area’s 8, 9 and 10, but data from Belgian and German colleagues will have to be merged to arrive at the final values for these areas. For the Dutch North Sea region, significant declines in oil rate...
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... found dead -Overall densities in winter 2014/15 were the lowest on record over the past 4 decades (Fig. 1). The severe storms that occurred washed away material rather than that new corpses washed ashore and the extremely mild winter (KNMI files) made even rather weak waterbirds and seabirds survive. In all 328 carcasses representing 47 species of birds and four species of marine mammals were recorded during these most recent censuses ...
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... rates in nearshore seabirds -The long-term trends of the coastal species Common Eiders ( Fig. 9) and Herring Gulls (Fig. 11) are even steeper declines. Oiled carcasses are currently rare, ...
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... oilrate 5 yr Running mean 13 even along the North Sea coast, indicating a more pronounced decline in oil rates than in offshore seabirds. Remarkably, the oil rates of the more gregarious Common Scoters (Fig. 10) did not decline, until rather recently. The decline coincided with a marked decline in overall numbers washing ashore, and although seawatchers have indicated that Common Scoters today are scarce in comparison with the 1970s-90s (Camphuysen & Van Dijk 1983, Platteeuw et al. 1994, www.trektellen.nl), high concentrations of birds have ...
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... by using Northern Fulmar carcasses around the North Sea (Van Franeker & SNS Fulmar Study Group 2013 and numerous other reports). In winter 2014/15, very few seabirds washed ashore, frustrating both projects, but the oil rates were again low signalling a major improvement in marine ecosystems for as far as chronic oil pollution is concerned (Fig. 1). The 5-year running (arithmetic) mean oil rate in Common Guillemots arrived at 22.6 ± 11.2% (Fig. 2). The latest results (last decade) suggest an acceleration of the decline in oil rates. Following the most recent data, (1999/00-present), a projection for 2020 would arrive at a national oil rate for Common Guillemots of c. 19% (logit ...
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