Exposure to climate change drives stability or collapse of desert mammal and bird communities
Exposure to climate change drives stability or collapse of desert mammal and bird communities
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DOI：
10.1126/science.abd4605
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发表时间：
2021-02-05
期刊：
影响因子：
56.9
通讯作者：
Beissinger, S. R.
中科院分区：
文献类型：
--
作者：
Riddell, E. A.;Iknayan, K. J.;Beissinger, S. R.
预计气候变化导致的高温暴露将使许多物种走向灭绝，从而威胁生物多样性。通常根据气候预测对一个地区的所有分类群评估这种暴露情况，然而物种有多种抵御极端温度的策略。我们利用跨越一个世纪的调查，比较了莫哈韦沙漠保护区内小型哺乳动物和鸟类群落的物种占有率和地点层面的丰富度变化。小型哺乳动物群落保持显著稳定，而鸟类因气候变暖和干燥而明显减少。热通量模拟确定了鸟类和哺乳动物对变暖的不同暴露程度，我们将其归因于微生境的利用。如果不考虑微生境缓冲对热通量的影响，气候预测的估计不太可能准确反映物种的暴露情况。
High exposure to warming from climate change is expected to threaten biodiversity by pushing many species toward extinction. Such exposure is often assessed for all taxa at a location from climate projections, yet species have diverse strategies for buffering against temperature extremes. We compared changes in species occupancy and site-level richness of small mammal and bird communities in protected areas of the Mojave Desert using surveys spanning a century. Small mammal communities remained remarkably stable, whereas birds declined markedly in response to warming and drying. Simulations of heat flux identified different exposure to warming for birds and mammals, which we attribute to microhabitat use. Estimates from climate projections are unlikely to accurately reflect species' exposure without accounting for the effects of microhabitat buffering on heat flux.