• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Spatially induced speciation prevents extinction: the evolution of dispersal distance in oscillatory predator-prey models.
【24h】

Spatially induced speciation prevents extinction: the evolution of dispersal distance in oscillatory predator-prey models.

机译：空间诱导的物种形成可防止灭绝：在振荡的捕食者－猎物模型中扩散距离的演变。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In a discrete-generation, individual-oriented model of predator-prey interactions that exhibits oscillations, we show that the self-structuring of the populations into spiral waves induces a selection pressure for ever-increasing dispersal distances in both populations. As the dispersal distances increase, the sizes of the spatial patterns increase, until they are too large to fit into the limited space. The patterns are then lost and the predators go extinct. This scenario, is, however, not the only outcome. A second selection pressure induced by the spatial boundary can cause reduction of the dispersal distances. Depending on the relative strengths of the two selection pressures, the predators and prey may speciate to give coexistence between short-dispersing boundary quasi-species and far-dispersing spiral quasi-species. Now, when pattern loss occurs, the predators switch to predating on the boundary prey quasi-species and do not go extinct. Also, if the populations reproduce sexually, local gene flow can inhibit the evolution of increasing dispersal distances, and hence the spatial patterns are not lost. Speciation and coexistence can also occur in the sexually reproducing species.
机译：在具有振荡的捕食者与被捕食相互作用的离散世代，面向个人的模型中，我们表明，种群向螺旋波的自我构造会引起选择压力，从而使两个种群中的扩散距离不断增加。随着散布距离的增加，空间图案的大小也会增加，直到它们太大而无法放入有限的空间中为止。然后，模式消失了，捕食者灭绝了。但是，这种情况并不是唯一的结果。由空间边界引起的第二选择压力可以引起分散距离的减小。取决于两种选择压力的相对强度，掠食者和猎物可能会特定地给出短分散边界准物种与远分散螺旋准物种之间的共存。现在，当发生模式损失时，捕食者切换到捕食边界猎物准物种，并且不会灭绝。同样，如果种群有性繁殖，则局部基因流可以抑制分散距离增加的进化，因此不会丧失空间格局。有性繁殖物种中也可能发生物种形成和共存。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号