作者: Tom Oliver , Jane K. Hill , Chris D. Thomas , Tom Brereton , David B. Roy
DOI: 10.1111/J.1461-0248.2009.01367.X
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摘要: Species are thought to have more restricted niches towards their range boundaries, although this has rarely been quantified systematically. We analysed transect data for 41 butterfly species along climatic gradients within Britain and show that 71% of broader at sites with milder winters. Shifts in habitat associations considerable across most species' ranges; averaged all species, we estimate if 26% individuals were associated the favoured on warmest transect, then 70% would be confined coldest transect. southerly distributions showed greatest changes associations. conclude geographic variation realized niche breadth is common relatively large, especially near should taken into account conserving under changing climates.