| 来源类型 | Article
|
| 规范类型 | 其他
|
| DOI | 10.1016/j.ecocom.2008.02.003
|
| Part-whole relations between food webs and the validity of local food-web descriptions. |
| Rossberg AG
|
| 发表日期 | 2008
|
| 出处 | Ecological Complexity 5 (2): 121-131
|
| 出版年 | 2008
|
| 语种 | 英语
|
| 摘要 | This work analyzes the relationship between large food webs describing potential feeding relations between species and smaller sub-webs thereof describing relations actually realized in local communities of various sizes. Special attention is given to the relationships between patterns of phylogenetic correlations encountered in large webs and sub-webs. Based on the current theory of food-web topology as implemented in the matching model, it is shown that food webs are scale invariant in the following sense: given a large web described by the model, a smaller, randomly sampled sub-web thereof is described by the model as well. A stochastic analysis of model steady states reveals that such a change in scale goes along with a re-normalization of model parameters. Explicit formulae for the re-normalized parameters are derived. Thus, the topology of food webs at all scales follows the same patterns, and these can be revealed by data and models referring to the local scale alone. As a by-product of the theory, a fast algorithm is derived which yields sample food webs from the exact steady state of the matching model for a high-dimensional trophic niche space in finite time. |
| 主题 | Evolution and Ecology (EEP)
|
| 关键词 | Food webs
Evolution
Networks
Spatial scale
Coalescence
|
| URL | http://pure.iiasa.ac.at/id/eprint/8567/
|
| 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/128846
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推荐引用方式
GB/T 7714 |
Rossberg AG. Part-whole relations between food webs and the validity of local food-web descriptions.. 2008.
|
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