Spatial effects in meta-foodwebs.

Spatial effects in meta-foodwebs.
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元食用量的空间效应。

DOI:
10.1038/s41598-017-08666-8
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发表时间:
2017-08-30
期刊:
影响因子:
4.6
通讯作者:
Gross T
Gross T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Barter E;Gross T

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在生态学中,人们普遍认为许多景观都是由离散的栖息地斑块组成的网络。栖息在斑块上的物种通过食物网(摄食相互作用的网络)相互作用。Pillai等人提出的元食物网模型将每个斑块的摄食关系与斑块之间的物种扩散结合起来,使得整个系统由网络的网络表示。以前的工作元食物网的景观网络,没有一个明确的空间嵌入,但在真实的景观的补丁通常分布在空间上。在这里,我们比较了没有空间嵌入的Erdens-Rényi网络和有空间嵌入的随机几何网络上的元食物网的扩散。我们发现,在空间嵌入式网络的本地结构和大的网络距离,导致专业和杂食性物种的补丁占领中尺度模式。特别是,我们发现空间分离使竞争物种的共存更有可能。我们的研究结果强调了空间嵌入对元食物网模型的影响,以及对它们进行新分析的必要性。
In ecology it is widely recognised that many landscapes comprise a network of discrete patches of habitat. The species that inhabit the patches interact with each other through a foodweb, the network of feeding interactions. The meta-foodweb model proposed by Pillai et al. combines the feeding relationships at each patch with the dispersal of species between patches, such that the whole system is represented by a network of networks. Previous work on meta-foodwebs has focussed on landscape networks that do not have an explicit spatial embedding, but in real landscapes the patches are usually distributed in space. Here we compare the dispersal of a meta-foodweb on Erdős-Rényi networks, that do not have a spatial embedding, and random geometric networks, that do have a spatial embedding. We found that local structure and large network distances in spatially embedded networks, lead to meso-scale patterns of patch occupation by both specialist and omnivorous species. In particular, we found that spatial separations make the coexistence of competing species more likely. Our results highlight the effects of spatial embeddings for meta-foodweb models, and the need for new analytical approaches to them.
DOI: 10.1126/science.aaa6224
发表时间: 2015-08-21
期刊: SCIENCE
影响因子: 56.9
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通讯作者: Kuris, Armand M.
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