Species-area relationships and biodiversity loss in fragmented landscapes.

Species-area relationships and biodiversity loss in fragmented landscapes.
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DOI:
10.1111/ele.12943
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发表时间:
2018-06
期刊:
影响因子:
8.8
通讯作者:
Rosindell J
Rosindell J
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Chisholm RA;Lim F;Yeoh YS;Seah WW;Condit R;Rosindell J

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为了估计栖息地破坏造成的物种损失,生态学家通常使用物种-面积关系,但这种方法忽略了栖息地破碎化的空间格局。在这里,我们提供了新的,易于应用的,分析方法,在任何空间尺度和栖息地丧失的任何空间格局的上下限立即物种损失。我们的公式表示的术语,我们称之为“普雷斯顿功能”,它描述了三相物种面积的关系,为毗邻地区。我们将我们的方法应用于三个不同尺度的森林砍伐和热带树种损失的案例研究:巴拿马,新加坡和巴西亚马逊的50公顷森林地块。我们的研究结果表明,立即物种损失是有点不敏感的碎片化模式在小尺度上,但在较大的尺度高度敏感:预测物种损失在亚马逊不同的栖息地损失的空间结构的一个因素为16。
To estimate species loss from habitat destruction, ecologists typically use species–area relationships, but this approach neglects the spatial pattern of habitat fragmentation. Here, we provide new, easily applied, analytical methods that place upper and lower bounds on immediate species loss at any spatial scale and for any spatial pattern of habitat loss. Our formulas are expressed in terms of what we name the ‘Preston function’, which describes triphasic species–area relationships for contiguous regions. We apply our method to case studies of deforestation and tropical tree species loss at three different scales: a 50 ha forest plot in Panama, the tropical city‐state of Singapore and the Brazilian Amazon. Our results show that immediate species loss is somewhat insensitive to fragmentation pattern at small scales but highly sensitive at larger scales: predicted species loss in the Amazon varies by a factor of 16 across different spatial structures of habitat loss.
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