Relationships between Long-Term Demography and Weather in a Sub-Arctic Population of Common Eider.

The resulting impacts on animal populations are likely to be significant at both regional and global scales [3] , [4] , [5] , [6] , [7] , [8] , [9] .

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The trends in numbers of breeding common eiders across the 17 colonies were variable, but several colonies showed a trend for increasing numbers after the 1960s or 1970s and also experienced declines in numbers from the 1990s onwards ( Fig. 2 ).

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