| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1086/378213 |
| The evolution of dispersal under demographic stochasticity. | |
| Cadet C; Ferriere R; Metz JAJ | |
| 发表日期 | 2003 |
| 出处 | The American Naturalist 162 (4): 427-441 |
| 出版年 | 2003 |
| 语种 | 英语 |
| 摘要 | Temporal and spatial variations of the environment are important factors favoring the evolution of dispersal. With few exceptions, these variations have been considered to be exclusively fluctuations of habitat quality. However, since the presence of conspecifics forms part of an individual's environment, demographic stochasticity may be a component of this variability as well, in particular when local populations are small. To study this effect, we analyzed the evolution of juvenile dispersal in a metapopulation model in which habitat quality is constant in space and time but occupancy fluctuates because of demographic stochasticity. Our analysis extends previous studies in that it includes competition of resources and competition for space. Also, juvenile dispersal is not given by a fixed probability but is made conditional on the presence of free territories in a patch, whereas individuals born in full patches will always disperse. Using a combination of analytical and numerical approaches, we show that demographic stochasticity in itself may provide enough variability to favor dispersal even from patches that are not fully occupied. However, there is no simple relationship between the evolution of dispersal and various indicators of demographic stochasticity. Selected dispersal depends on all aspects of the life-history profile, including kin selection. |
| 主题 | Adaptive Dynamics Network (ADN) |
| 关键词 | Dispersal Demographic stochasticity Adaptive dynamics Density dependence Viability |
| URL | http://pure.iiasa.ac.at/id/eprint/6830/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/128224 |
| 推荐引用方式 GB/T 7714 | Cadet C,Ferriere R,Metz JAJ. The evolution of dispersal under demographic stochasticity.. 2003. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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