| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Size-dependent mortality and competition interactively shape community diversity. | |
| Taborsky B; Heino M; Dieckmann U | |
| 发表日期 | 2012 |
| 出版者 | IIASA, Laxenburg, Austria: IR-12-072 |
| 出版年 | 2012 |
| 语种 | 英语 |
| 摘要 | Body size is recognized as a major factor in evolutionary processes mediating sympatric diversificatin and community structuring. Life-history types with distinct body sizes can result from two fundamental mechanisms, size-dependent competition and size-dependent mortality. While previous theoretical studies investigated these two pocesses in separation, the model analyzed here allows both selective forces to affect body-size evolution interatively. Here we show for the first time that in the presence of size-dependent competition, size-dependent mortality can give rise to multiple, coexisting size morphs representing the final outcomes of evolution. Moreover, our results demonstrate that interactions between size-dependent competition and mortality can create characteristic abrupt changes in size strcture and nonmonotonic patterns of biological diversity along continuous and monotonic environmental gradients. We find that the two selective forces differentially affect the body-size ratios of coexisting morphs: size-dependent comptition results in small and relatively constant ratios, whereas size-dependent mortality can open niches for morphs that grealy differ in body size. We show that these differential effects result in characteristic distributions of size ratios across communities, which we suggest can help detect the concurrent action and relative influence of size-dependent competition an mortality in nature. |
| 主题 | Evolution and Ecology (EEP) |
| URL | http://pure.iiasa.ac.at/id/eprint/10207/ |
| 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/125847 |
| 推荐引用方式 GB/T 7714 | Taborsky B,Heino M,Dieckmann U. Size-dependent mortality and competition interactively shape community diversity.. 2012. |
| 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-12-072.pdf（506KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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