Ecological networks, nestedness and sampling effort
Ecological networks, nestedness and sampling effort
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DOI：
10.1111/j.1365-2745.2007.01271.x
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发表时间：
2007-09-01
影响因子：
5.5
通讯作者：
Bascompte, Jordi
中科院分区：
文献类型：
--
作者：
Nielsen, Anders;Bascompte, Jordi
1.生态网络已被证明是一种嵌套结构。为了嵌套，网络必须由一组核心通才组成，所有通才都相互作用，极端专家只与通才物种相互作用。对生态网络的研究特别容易受到抽样效应的影响，因为它们涉及整个物种组合。然而，我们知道没有研究解决嵌套在多大程度上取决于采样努力，尽管许多研究讨论嵌套网络的生态和进化意义。在这里，我们操纵采样努力的时间和空间，并表明嵌套是不敏感的采样努力比网络内的物种和链接的数量。生态网络的结构属性似乎不太容易受到抽样偏差的影响，这对生态网络的其他研究是令人鼓舞的。这是因为它表明，生态网络属性的采样努力的影响的敏感性可能比以前预期的要小。
1. Ecological networks have been shown to display a nested structure. To be nested, a network must consist of a core group of generalists all interacting with each other, and with extreme specialists interacting only with generalist species.2. Studies on ecological networks are especially prone to sampling effects, as they involve entire species assemblages. However, we know of no study addressing to what extent nestedness depends on sampling effort, despite the numerous studies discussing the ecological and evolutionary implications of nested networks.3. Here we manipulate sampling effort in time and space and show that nestedness is less sensitive to sampling effort than number of species and links within the network.4. That a structural property of an ecological network appears less prone to sampling bias is encouraging for other studies of ecological networks. This is because it indicates that the sensitivity of ecological networks properties to effects of sampling effort might be smaller than previously expected.