Frequent long-distance plant colonization in the changing Arctic
Frequent long-distance plant colonization in the changing Arctic
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DOI：
10.1126/science.1139178
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发表时间：
2007-06-15
期刊：
影响因子：
56.9
通讯作者：
Brochmann, Christian
中科院分区：
文献类型：
--
作者：
Alsos, Inger Greve;Eidesen, Pernille Bronken;Brochmann, Christian
物种在气候变化后追踪其生态位的能力是预测其未来分布的不确定性的主要来源。通过分析9种植物的DNA指纹图谱（扩增片段长度多态性），我们表明，远程北极群岛，斯瓦尔巴群岛，已发生多次和从几个来源地区的长距离殖民。彗星很可能是由风和漂流的海冰携带的。限制殖民的遗传效应与物种的温度要求密切相关，表明建立限制分布比分散。因此，在预测北极的长期范围变化时，假设无限制的扩散可能是适当的。
The ability of species to track their ecological niche after climate change is a major source of uncertainty in predicting their future distribution. By analyzing DNA fingerprinting ( amplified fragment-length polymorphism) of nine plant species, we show that long-distance colonization of a remote arctic archipelago, Svalbard, has occurred repeatedly and from several source regions. Propagules are likely carried by wind and drifting sea ice. The genetic effect of restricted colonization was strongly correlated with the temperature requirements of the species, indicating that establishment limits distribution more than dispersal. Thus, it may be appropriate to assume unlimited dispersal when predicting long-term range shifts in the Arctic.