| 来源类型 | Article |
| 规范类型 | 其他 |
| Cooperation and competition in heterogeneous environments: The evolution of resource sharing in clonal plants. | |
| Magori K; Oborny B; Dieckmann U; Meszena G | |
| 发表日期 | 2003 |
| 出处 | Evolutionary Ecology Research : 787-817. |
| 出版年 | 2003 |
| 语种 | 英语 |
| 摘要 | Plant species show great variation in the degree of physiological integration between developmental units (modules). When this physiological integration is minimal, individual modules are self-supporting and compete with other modules. When there is greater physiological integration, modules remain physiologically connected and 'cooperate' by sharing resources like water, nutrients and photoassimilates taken up from their local environments. Thus, local differences in habitat quality can be diminished within a group of modules. Here we examine how the evolutionarily optimal amount of integration depends on habitat type - with habitats being characterized by the proportion of resource-rich and resource-poor sites and by the turnover rate between them. Two main questions are addressed: First, how does spatial heterogeneity influence natural selection for or against integration? Second, can adaptation, under reasonable ecological conditions, stabilize partial integration? A non-spatial version of the model, which assumes well-mixed populations, predicts the complete physiological independence of modules as the only evolutionarily stable outcome in any realistic habitat type. By contrast, a spatially explicit version of the model reveals the adaptive advantage of integration in typical high-risk habitats, where resource-rich sites are sparsely distributed in space and transient in time. We conclude that habitat diversity without spatial population structure is sufficient to explain the evolutionary loss of physiological integration. But only the additional consideration of spatial population structure can convincingly explain any backward transition and the stable existence of partial integration. |
| 主题 | Adaptive Dynamics Network (ADN) |
| 关键词 | Adaptive dynamics Cellular automata Clonal growth Competition Cooperation Patchy habitats Physiological integration Plant development Spatially structured populations |
| URL | http://pure.iiasa.ac.at/id/eprint/6815/ |
| 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/128172 |
| 推荐引用方式 GB/T 7714 | Magori K,Oborny B,Dieckmann U,et al. Cooperation and competition in heterogeneous environments: The evolution of resource sharing in clonal plants.. 2003. |
| 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 | ||
| Cooperation_and_comp（843KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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