| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Evolution Restricts the Coexistence of Specialists and Generalists - The Role of Trade-Off Structure. | |
| Egas M; Dieckmann U; Sabelis MW | |
| 发表日期 | 2004 |
| 出版者 | IIASA, Laxenburg, Austria: IR-04-004 |
| 出版年 | 2004 |
| 语种 | 英语 |
| 摘要 | Environmental variability and adaptive foraging behavior have been shown to favor coexistence of specialists and generalists on an ecological time scale. This leaves unaddressed the question whether such coexistence can also be expected on an evolutionary time scale. In this article we study the attainability, through gradual evolution, of specialist-generalist coexistence, as well as the evolutionary stability of such communities when allowing for immigration. Our analysis shows that the potential for specialist-generalist coexistence is much more restricted than originally thought, and strongly depends on the trade-off structure assumed. We establish that ecological coexistence is less likely for species facing a trade-off between per capita reproduction in different habitats than when the trade-off acts on carrying capacities alone. We also demonstrate that coexistence is evolutionarily stable whenever it is ecologically stable, but that in most cases such coexistence cannot be reached through gradual evolution. We conclude that an evolutionarily stable community of specialists and generalists may only be created through immigration from elsewhere or through mutations of large effect. Our results highlight that trade-offs in fitness-determining traits can have counterintuitive effects on the evolution of specialization. |
| 主题 | Adaptive Dynamics Network (ADN) |
| URL | http://pure.iiasa.ac.at/id/eprint/7441/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125367 |
| 推荐引用方式 GB/T 7714 | Egas M,Dieckmann U,Sabelis MW. Evolution Restricts the Coexistence of Specialists and Generalists - The Role of Trade-Off Structure.. 2004. |
| 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 | ||
| IR-04-004.pdf（295KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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