High resistance towards herbivore-induced habitat change in a high Arctic arthropod community

High resistance towards herbivore-induced habitat change in a high Arctic arthropod community
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北极高节肢动物群落对食草动物引起的栖息地变化具有高度抵抗力

DOI:
10.1098/rsbl.2018.0054
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发表时间:
2018
期刊:
影响因子:
3.3
通讯作者:
Roslin TV
Roslin TV
中科院分区:
生物学2区
文献类型:
--
作者:
Schmidt NM;Mosbacher JB;Eitzinger B;Vesterinen EJ;Roslin TV

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哺乳动物食草动物可能对植物群落产生强烈影响,并且往往是植被组成和多样性的关键驱动因素。我们测试了这种哺乳动物引起的变化,以高北极植物群落是否反映在其他营养水平的结构。具体而言,我们测试了是否大量的植被变化后,实验排除麝牛(Ovibos moschatus)改变了节肢动物群落的组成和捕食者-猎物的相互作用。总体而言,我们没有发现麝香排斥对节肢动物群落的影响:节肢动物捕食者(蜘蛛)和他们的猎物的多样性和丰富度不受麝香的存在,所以是捕食者-猎物相互作用的定性和定量结构。因此,高北极节肢动物群落似乎对它们栖息地中甚至大的生物变化具有很高的抵抗力,我们将其归因于食物网中的高连通性。
Mammal herbivores may exert strong impacts on plant communities, and are often key drivers of vegetation composition and diversity. We tested whether such mammal-induced changes to a high Arctic plant community are reflected in the structure of other trophic levels. Specifically, we tested whether substantial vegetation changes following the experimental exclusion of muskoxen (Ovibos moschatus) altered the composition of the arthropod community and the predator–prey interactions therein. Overall, we found no impact of muskox exclusion on the arthropod community: the diversity and abundance of both arthropod predators (spiders) and of their prey were unaffected by muskox presence, and so was the qualitative and quantitative structure of predator–prey interactions. Hence, high Arctic arthropod communities seem highly resistant towards even large biotic changes in their habitat, which we attribute to the high connectance in the food web.
揭示北极食物网的结构
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