| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1007/s10682-008-9251-7 |
| Speciation and the evolution of dispersal along environmental gradients. | |
| Heinz SK; Mazzucco R; Dieckmann U | |
| 发表日期 | 2009 |
| 出处 | Evolutionary Ecology 23 (1): 53-70 |
| 出版年 | 2009 |
| 语种 | 英语 |
| 摘要 | We analyze the joint evolution of an ecological character and of dispersal distance in asexual and sexual populations inhabiting an environmental gradient. Several interesting phenomena resulting from the evolutionary interplay of these characters are revealed. First, asexual and sexual populations exhibit two analogous evolutionary regimes, in which either speciation in the ecological character occurs in conjunction with evolution of short-range dispersal, or dispersal distance remains high and speciation does not occur. Second, transitions between these two regimes qualitatively differ between asexual and sexual populations, with the former showing speciation with long-range dispersal and the latter showing no speciation with short-range dispersal. Third, a phenotypic gradient following the environmental gradient occurs only in the last case, i.e., for non-speciating sexual populations evolving towards short-range dispersal. Fourth, the transition between the evolutionary regimes of long-range dispersal with no speciation and short-range dispersal with speciation is typically abrupt, mediated by a positive feedback between incipient speciation and the evolution of short-range dispersal. Fifth, even though the model of sexual evolution analyzed here does not permit assortative mating preferences, speciation occurs for a surprisingly wide range of conditions. This illustrates that dispersal evolution is a powerful alternative to preference evolution in enabling spatially distributed sexual populations to respond to frequency- dependent disruptive selection. |
| 主题 | Evolution and Ecology (EEP) ; Postdoctoral Scholars (PDS) |
| 关键词 | Speciation Dispersal Gradient Cline Sexual reproduction Frequency-dependent selection |
| URL | http://pure.iiasa.ac.at/id/eprint/8893/ |
| 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/129018 |
| 推荐引用方式 GB/T 7714 | Heinz SK,Mazzucco R,Dieckmann U. Speciation and the evolution of dispersal along environmental gradients.. 2009. |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
