Microclimates buffer the responses of plant communities to climate change
Microclimates buffer the responses of plant communities to climate change
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DOI：
10.1111/geb.12359
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发表时间：
2015-11
影响因子：
6.4
通讯作者：
I. Maclean;J. Hopkins;J. Bennie;C. Lawson;R. Wilson
中科院分区：
文献类型：
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作者：
I. Maclean;J. Hopkins;J. Bennie;C. Lawson;R. Wilson
尽管气候变化导致的高灭绝风险的预测，范围扩大已被记录更频繁地比范围收缩，促使建议，物种可以忍受气候变化，坚持在凉爽或潮湿的小气候。我们测试这种“微避难所”是否存在。地点英国。方法：我们研究了沿海草原植物群落在30年内的细尺度变化，其中春季温度上升了1.4 °C。我们看看是否在社区组成和当地殖民地的变化，并与小气候条件。结果我们的研究结果表明，虽然社区重组是一致的变暖，变化较小的凉爽，朝北的斜坡。仔细检查的物种营业额的模式显示，低温要求的物种能够坚持在较冷的斜坡，而那些高水分的要求遭受类似的下降，在所有的小气候占用。主要结论我们的研究结果表明，较冷的斜坡可以作为microrefugia，缓冲植物群落的温度升高的影响，通过延迟的物种与低温的要求。
Aim Despite predictions of high extinction risk resulting from climate change, range expansions have been documented more frequently than range retractions, prompting suggestions that species can endure climatic changes by persisting in cool or damp microclimates. We test whether such ‘microrefugia’ exist. Location The United Kingdom. Methods We examine fine-scale changes in the plant communities of a coastal grassland over a 30-year period in which spring temperatures increased by 1.4 °C. We look at whether changes in community composition and local colonizations and extinctions are related to microclimatic conditions. Results Our findings suggest that while community reassembly was consistent with warming, changes were smaller on cooler, north-facing slopes. Closer inspection of the patterns of species turnover revealed that species with low temperature requirements were able to persist on cooler slopes, while those with high moisture requirements suffered similar decreases in occupancy across all microclimates. Main conclusions Our results suggest that cooler slopes may act as microrefugia, buffering the effects on plant communities of increases in temperature by delaying extinctions of species with low temperature requirements.