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Jul
31
2008
Small species ranges increase extinction risk, study finds
Species with small ranges face a greater extinction risk from climate change, according to a paper published this week in Biology Letters. University of Durham researcher Ralf Ohlemüller – now at York – and colleagues studied species ranges in European butterflies and plants and Western Hemisphere birds, and noticed a link between rare pockets of habitat and smaller species ranges. Those rare patches — at unusually high or low altitude compared to the surrounding landscape, for example — and their atypical species composition and diversity, are likely relicts from the last ice age. Species there have clung onto survival under the warmer climes they’ve experienced since, but they are particularly vulnerable to the impact of future climate change, being marooned in ever-shrinking oases. Source: Ohlemüller R, Anderson BJ, Araújo MB, Butchart SHM, Kudrna O, Ridgely RS & Thomas CD (2008) The coincidence of climatic and species rarity: high risk to small-range species from climate change. Biol. Lett. DOI: 10.1098/rsbl.2008.0097
Image: © Ljupco Smokovski
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Jul
29
2008
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Jul
23
2008
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Jul
22
2008
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Jul
21
2008
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Jul
17
2008
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Jul
14
2008
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Jul
7
2008
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Jul
3
2008
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Jul
1
2008
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