| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1016/j.jtbi.2014.10.024 |
| Evolution of dispersal distance: Maternal investment leads to bimodal dispersal kernels. | |
| Fronhofer EA; Poethke HJ; Dieckmann U | |
| 发表日期 | 2015 |
| 出处 | Journal of Theoretical Biology 365: 270-279 |
| 出版年 | 2015 |
| 语种 | 英语 |
| 摘要 | Since dispersal research has mainly focused on the evolutionary dynamics of dispersal rates, it remains unclear what shape evolutionarily stable dispersal kernels have. Yet, detailed knowledge about dispersal kernels, quantifying the statistical distribution of dispersal distances, is of pivotal importance for understanding biogeographic diversity, predicting species invasions, and explaining range shifts. We therefore examine the evolution of dispersal kernels in an individual-based model of a population of sessile organisms, such as trees or corals. Specifically, we analyze the influence of three potentially important factors on the shape of dispersal kernels: distance-dependent competition, distance-dependent dispersal costs, and maternal investment reducing an offspring's dispersal costs through a trade-off with maternal fecundity. We find that without maternal investment, competition and dispersal costs lead to unimodal kernels, with increasing dispersal costs reducing the kernel's width and tail weight. Unexpectedly, maternal investment inverts this effect: kernels become bimodal at high dispersal costs. This increases a kernel's width and tail weight, and thus the fraction of long-distance dispersers, at the expense of simultaneously increasing the fraction of non-dispersers. We demonstrate the qualitative robustness of our results against variations in the tested parameter combinations. |
| 主题 | Evolution and Ecology (EEP) |
| 关键词 | Competition kernel Distance-dependent dispersal costs Maternal effects Individual-based model Genetic algorithm |
| URL | http://pure.iiasa.ac.at/id/eprint/11552/ |
| 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/130195 |
| 推荐引用方式 GB/T 7714 | Fronhofer EA,Poethke HJ,Dieckmann U. Evolution of dispersal distance: Maternal investment leads to bimodal dispersal kernels.. 2015. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| FronhoferEtal2014_ke（215KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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