Drought-induced shift of a forest-woodland ecotone: Rapid landscape response to climate variation
Drought-induced shift of a forest-woodland ecotone: Rapid landscape response to climate variation
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DOI：
10.1073/pnas.95.25.14839
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发表时间：
1998-12-08
影响因子：
11.1
通讯作者：
Breshears, DD
中科院分区：
文献类型：
--
作者：
Allen, CD;Breshears, DD
在接下来的几十年里，全球气候变化预计将以前所未有的速度带来植被分布的巨大变化。这些变化预计将在生态系统之间的边界--交错带，特别是半干旱地区的交错带--最为迅速和极端。然而，目前的模型不能充分提供如此迅速的影响，特别是那些由死亡造成的影响，这主要是因为缺乏实地研究的数据。在这里，我们报道了有记录以来最快的木本交错带的景观尺度变化：20世纪50年代，在新墨西哥州北部，半干旱的黄松林和松柏林地之间的交错带发生了广泛的(2公里或更远)和快速的(
In coming decades, global climate changes are expected to produce large shifts in vegetation distributions at unprecedented rates. These shifts are expected to be most rapid and extreme at ecotones, the boundaries between ecosystems, particularly those in semiarid landscapes. However, current models do not adequately provide for such rapid effects-particularly those caused by mortality-largely because of the lack of data from field studies. Here we report the most rapid landscape-scale shift of a woody ecotone ever documented: in northern New Mexico in the 1950s, the ecotone between semiarid ponderosa pine forest and pinon-juniper woodland shifted extensively (2 km or more) and rapidly (