Artikel bij wilde kokkels is sterk verwant aan gegevens bij

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Artikel bij wilde kokkels is sterk verwant aan gegevens bij

Post by ahospers »

Goed, nu heb ik wel het artikel gevonden en het blijkt sterk gerelateerd aan het SOVON artikel.
http://www.wildekokkels.nl/artikelen/grafieken.htm
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<BR>DECLING POPULATIONS OF BIRDS
<BR>depending on shellfish
<BR>
<BR>The birds have not been so lucky… In the 1970s oystercatchers started breeding in the heavily fertilised meadows of The Netherlands and the numbers wintering in the Dutch Wadden Sea increased from 150,000 to 220,000 birds. With the advent of large-scale mechanical cockle dredging, since the late 1980s numbers have been in decline, with the wintering population now being even lower than before the discovery of the Dutch meadows!

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<BR>About 120,000 Eider Ducks wintered in the Wadden Sea area since at least the early 1970s. After an initial decrease in the late 1980s they have been in steep decline in the Wadden Sea since the mid 1990s. Large numbers have died of starvation and even more birds have tried their luck along
<BR>the North Sea coast.
<BR>
<BR>Knots are the smallest shellfish-eating specialist, and roam widely between estuaries in Western Europe. They would be least expected to be negatively affected by decreasing shellfish stocks since there will be many alternative sites that they can find. Nevertheless, despite intense counting and complete coverage, the Knot numbers counted this past winter are the lowest ever. Never before has their been a steep decline over four successive winters.
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