Range shifting on a fragmented landscape
Range shifting on a fragmented landscape
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DOI：
10.1016/j.ecoinf.2006.12.001
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发表时间：
2007-01-01
影响因子：
5.1
通讯作者：
Dytham, C.
中科院分区：
文献类型：
--
作者：
McInerny, G.;Travis, J. M. J.;Dytham, C.
到目前为止，物种对气候变化的预测反应几乎没有包括在其范围内对物种分布起重要决定作用的因素。在这篇文章中，我们利用一个空间显式的细胞格子，殖民-灭绝模型来研究栖息地丧失、碎片化和物种特征对范围转移的影响，以响应气候变化。与静态气候模型中斑块占有率的预测相反，我们表明，当物种具有较高的殖民率时，碎片化可以对物种的生存产生积极的影响。对于低定殖率的物种，聚集行为阻止了在栖息地丧失程度较高的碎片化景观上的成功，而范围转移在栖息地相关的地方更成功地实现。在接近灭绝阈值的栖息地丧失水平上，较少的碎片化景观可以促进范围转移，即使是最好的殖民者也是如此。我们讨论了施加气候窗口可以如何减少渗入路线，并对任何给定栖息地可获得性水平下的可用栖息地面积产生影响。我们论证了景观结构对范围转移动态的重要性，并认为保护区网络的管理需要考虑具有不同生活史特征的物种的需求。(C)2007 Elsevier B.V.保留所有权利。
Projected responses of species' to climate change have so far included few of the factors that are important determinants of species' distributions within its range. In this paper we utilise a spatially explicit cellular lattice, colonisation-extinction model to investigate the effect of habitat loss, fragmentation and species characteristics on range shifting in response to climate change. Contrary to the predictions of patch occupancy in static climate models we show that fragmentation can have a positive effect on species survival when species have high colonisation rates. For species with low colonisation rates aggregative behaviours prevent success on fragmented landscapes at high levels of habitat loss, and range shifting is more successfully achieved where habitat is correlated. At levels of habitat loss near the extinction threshold, less fragmented landscapes can facilitate range shifting even for the best colonisers. We discuss how imposing a climate window may reduce percolation routes and have implications for the area of usable habitat at any given level of habitat availability. We demonstrate the importance of landscape structure for range shifting dynamics and argue that management of reserve networks needs to consider the requirements of species with different life history characteristics. (c) 2007 Elsevier B.V. All rights reserved.