Abstract

The current publication attempts to overview the results of offshore studies of seabirds in the eastern part of the Baltic Proper during the last decade specifically concentrating on ecological analysis of drastically changing population volumes and maximal density trends of the most representative ecological groups of wintering seabirds in the gradient of winter climatic conditions. Significant fluctuations in maximal seabird density levels were found in different phases of the gradient of winter climatic conditions indicating possibly different survival strategies of dominating species and ecological groups of wintering seabirds. Generally the negative impact of extreme winter climatic conditions was evident in the case of all seabird species studied, manifesting itself either through a dramatic decline of feeding resources, or worsening of foraging conditions in typically preferable shallow coastal marine aquatories.

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