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Résumé :
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Global climate change is no longer speculation, but reality. It will have unprecedented effects on Britain's weather and climate, and on habitats, ecosystems and the flora and fauna which comprise them, including birds. As a result, during the next century there are likely to be major changes in our avifauna: range extensions and contractions, rises and declines in populations, new colonists and extinctions as British breeding birds. Global warming will also affect patterns of migration, wintering and vagrancy, with long-distance migrants particularly at risk. In order to deal with the new challenges posed by climate change, our current conservation strategy will have to shift rapidly and radically. Whole ecosystems may have to be relocated or in some cases created from scratch, in order to deal with loss of habitat and changes in range. Whether or not this will ultimately prove successful it is still too early to say.
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