Impact of a century of climate change on small-mammal communities in Yosemite National Park, USA
Impact of a century of climate change on small-mammal communities in Yosemite National Park, USA
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DOI：
10.1126/science.1163428
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发表时间：
2008-10-10
期刊：
影响因子：
56.9
通讯作者：
Beissinger, Steven R.
中科院分区：
文献类型：
--
作者：
Moritz, Craig;Patton, James L.;Beissinger, Steven R.
我们通过重复Grinnell在跨越美国加利福尼亚州约塞米蒂国家公园3000米海拔梯度上的20世纪初的调查，提供了小型哺乳动物对全球变暖的百年尺度的看法，而不会混淆土地利用变化的影响。使用占有率模型控制可探测性的变化，我们显示，在监测的28种物种中，有一半的海拔极限发生了实质性的(类似于平均500米)向上变化，与观察到的最低温度类似于3摄氏度的上升一致。以前的低海拔物种扩大了它们的范围，高海拔物种收缩了它们的范围，导致了中、高海拔群落组成的变化。由于物种的反应是特殊的，同类之间的海拔更替发生了变化。尽管一些高海拔物种受到威胁，但海拔梯度的保护允许其他物种通过迁徙做出反应。
We provide a century-scale view of small-mammal responses to global warming, without confounding effects of land-use change, by repeating Grinnell's early-20th century survey across a 3000-meter-elevation gradient that spans Yosemite National Park, California, USA. Using occupancy modeling to control for variation in detectability, we show substantial (similar to 500 meters on average) upward changes in elevational limits for half of 28 species monitored, consistent with the observed similar to 3 degrees C increase in minimum temperatures. Formerly low-elevation species expanded their ranges and high-elevation species contracted theirs, leading to changed community composition at mid- and high elevations. Elevational replacement among congeners changed because species' responses were idiosyncratic. Though some high-elevation species are threatened, protection of elevation gradients allows other species to respond via migration.