| 来源类型 | Article |
| 规范类型 | 其他 |
| Population growth in space and time: Spatial logistic equations. | |
| Law R; Murrell DJ; Dieckmann U | |
| 发表日期 | 2003 |
| 出处 | Ecology 84 (1): 252-262. |
| 出版年 | 2003 |
| 语种 | 英语 |
| 摘要 | How great an effect does self-generated spatial structure have on logistic population growth? Results are described from an individual based model (IBM) with spatially localized dispersal and competition, and from a deterministic approximation to the IBM describing the dynamics of the first and spatial moments. The dynamical system incorporates a novel closure that gives a close approximation to the IBM in the presence of strong spatial structure. Population growth given by the spatial logistic equation can differ greatly from that of the non-spatial logistic model. Numerical simulations show that populations may grow more slowly or more rapidly than would be expected from the non-spatial model, and may reach their maximum rate of increase at densities other than half of the carrying capacity. Populations can achieve asymptotic densities substantially greater than or less than the carrying capacity of the non-spatial logistic model, and can even tend toward extinction. These properties of the spatial logistic equation are caused by a local dispersal and competition which effect spatial structure, which in turn affects population growth. Accounting for these spatial processes brings the theory of single-species population growth a step closer to the growth of real spatially-structured populations. |
| 主题 | Adaptive Dynamics Network (ADN) |
| URL | http://pure.iiasa.ac.at/id/eprint/6889/ |
| 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/128277 |
| 推荐引用方式 GB/T 7714 | Law R,Murrell DJ,Dieckmann U. Population growth in space and time: Spatial logistic equations.. 2003. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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