| 来源类型 | Article
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| 规范类型 | 其他
|
| DOI | 10.1126/science.1173536
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| Generalized models reveal stabilizing factors in food webs. |
| Gross T; Rudolf L; Levin SA; Dieckmann U
|
| 发表日期 | 2009
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| 出处 | Science 325 (5941): 747-750
|
| 出版年 | 2009
|
| 语种 | 英语
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| 摘要 | Insights into what stabilizes natural food webs have always been limited by a fundamental dilemma: Studies either need to make unwarranted simplifying assumptions, which undermines their relevance, or only examine few replicates of small food webs, which hampers the robustness of findings. We used generalized modeling to study several billion replicates of food webs with nonlinear interactions and up to 50 species. In this way, first we show that higher variability in link strengths stabilizes food webs only when webs are relatively small, whereas larger webs are instead destabilized. Second, we reveal a new power law describing how food-web stability scales with the number of species and their connectance. Third, we report two universal rules: Food-web stability is enhanced when (i) species at a high trophic level feed on multiple prey species and (ii) species at an intermediate trophic level are fed upon by multiple predator species. |
| 主题 | Evolution and Ecology (EEP)
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| URL | http://pure.iiasa.ac.at/id/eprint/8834/
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| 来源智库 | International Institute for Applied Systems Analysis (Austria)
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| 引用统计 |
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/128967
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推荐引用方式
GB/T 7714 |
Gross T,Rudolf L,Levin SA,et al. Generalized models reveal stabilizing factors in food webs.. 2009.
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