Climate-driven range extension of Amphistegina (protista, foraminiferida): models of current and predicted future ranges.
Climate-driven range extension of Amphistegina (protista, foraminiferida): models of current and predicted future ranges.
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DOI：
10.1371/journal.pone.0054443
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Rödder D
中科院分区：
文献类型：
--
作者：
Langer MR;Weinmann AE;Lötters S;Bernhard JM;Rödder D
物种分布范围的扩大是全球气候变化的一个预测和实现的后果。气候变暖和热带向极地扩展导致各种海洋和陆地物种的活动范围发生变化。范围扩大可能对本地生物群和生态系统功能产生广泛影响，因为迁移物种可能扰乱接受社区。较大的共生有孔虫构成浅水生态系统的普遍存在和突出的组成部分，这些重要的原生生物的范围转移可能会引发生态系统功能的变化。我们已经使用历史和新获得的发生记录来计算双盖藻属的当前范围变化，一个更大的共生轴承有孔虫，沿着非洲东部海岸线，并将它们与目前在地中海观察到的类似范围的变化进行比较。这项研究提供了新的证据，表明双盖有孔虫正在迅速向西南方向前进，接近南纬31°的爱德华港（南非）。为了预测未来的物种分布，我们应用了一个物种分布模型（SDM）的基础上，生态位的限制，目前的分布范围。我们的模型表明，进一步变暖可能会导致持续的范围扩展，并预测扩散沿着几乎整个非洲东南海岸。根据计算，在8至2.7 km/a之间，双叶蜂类的平均范围移动速率，预计在2100年，双叶蜂类的范围将向南扩展267 km，或2.4°纬度。我们的研究结果证实了化石记录中的发现，即一些较大的共生有孔虫可以很好地科普水温上升，并且是全球气候变化的受益者。
Species-range expansions are a predicted and realized consequence of global climate change. Climate warming and the poleward widening of the tropical belt have induced range shifts in a variety of marine and terrestrial species. Range expansions may have broad implications on native biota and ecosystem functioning as shifting species may perturb recipient communities. Larger symbiont-bearing foraminifera constitute ubiquitous and prominent components of shallow water ecosystems, and range shifts of these important protists are likely to trigger changes in ecosystem functioning. We have used historical and newly acquired occurrence records to compute current range shifts of Amphistegina spp., a larger symbiont-bearing foraminifera, along the eastern coastline of Africa and compare them to analogous range shifts currently observed in the Mediterranean Sea. The study provides new evidence that amphisteginid foraminifera are rapidly progressing southwestward, closely approaching Port Edward (South Africa) at 31°S. To project future species distributions, we applied a species distribution model (SDM) based on ecological niche constraints of current distribution ranges. Our model indicates that further warming is likely to cause a continued range extension, and predicts dispersal along nearly the entire southeastern coast of Africa. The average rates of amphisteginid range shift were computed between 8 and 2.7 km year−1, and are projected to lead to a total southward range expansion of 267 km, or 2.4° latitude, in the year 2100. Our results corroborate findings from the fossil record that some larger symbiont-bearing foraminifera cope well with rising water temperatures and are beneficiaries of global climate change.
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