Topoclimates, refugia, and biotic responses to climate change
Topoclimates, refugia, and biotic responses to climate change
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DOI：
10.1002/fee.2204
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发表时间：
2020-06-01
影响因子：
10.3
通讯作者：
Flint, Lorraine E.
中科院分区：
文献类型：
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作者：
Ackerly, David D.;Kling, Matthew M.;Flint, Lorraine E.
植物的分布受气候和地形的影响很大。在对加州选定树种的地理和地形分布进行分析时，我们发现，随着树木接近其地理范围的边缘，树木种群越来越多地局限于极端地形位置，占据较冷的、面向极点的斜坡（在温暖干燥的边缘）和较温暖的、面向赤道的斜坡（在凉爽潮湿的边缘）。在局部尺度上，物种在地形梯度上的分布也与物种的地理范围相关（在景观中占据较冷位置的物种具有较冷，潮湿的地理分布，反之亦然）。模型输出结果表明，在面向极点的斜坡和面向赤道的斜坡上发现的物种将分别经历人口减少和人口增加，以应对更温暖和更干燥的未来。因此，占据较冷景观位置的树种，在某些情况下被视为避难所，可能最受人为气候变化的威胁。
Plant distributions are strongly influenced by both climate and topography. In an analysis of geographic and topographic distributions for selected tree species in California, we found that tree populations are increasingly restricted to extreme topographic positions as they approach the edge of their geographic ranges, occupying cooler, pole-facing slopes (at the warm and dry edge) and warmer, equator-facing slopes (at the cool and moist edge). At a local scale, species distributions across topographic gradients also correlate with species geographic ranges (species that occupy cooler locations within the landscape have cooler, moister geographic distributions, and vice versa). Model outputs indicated that species found on pole-facing slopes and equator-facing slopes will experience population declines and population increases, respectively, in response to a warmer and drier future. As such, tree species occupying cooler landscape locations, which are viewed as refugia in some contexts, may be most threatened by anthropogenic climate change.