Experimental evolution of dispersal in spatiotemporally variable microcosms
Experimental evolution of dispersal in spatiotemporally variable microcosms
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DOI：
10.1046/j.1461-0248.2003.00524.x
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发表时间：
2003-10-01
期刊：
影响因子：
8.8
通讯作者：
Friedenberg, NA
中科院分区：
文献类型：
--
作者：
Friedenberg, NA
世界是一个不确定的地方。个人的命运因地而异，因时而异。在不可预测的环境中，自然选择应该有利于那些通过分散后代来对冲风险的个体。我在实验微观环境中使用秀丽隐杆线虫证实了这一基本预测。我的研究结果与进化模型和之前在自然界中发现的栖息地稳定性和个体扩散倾向之间的相关性一致。然而，我也发现触发条件扩散行为的环境变化可能不会对基线扩散率施加选择。这些发现表明，自然系统中干扰率的增加有可能在受影响生物的生活史中引起进化反应。
The world is an uncertain place. Individuals' fates vary from place to place and from time to time. Natural selection in unpredictable environments should favour individuals that hedge their bets by dispersing offspring. I confirm this basic prediction using Caenorhabditis elegans in experimental microcosms. My results agree with evolutionary models and correlations found previously between habitat stability and individual dispersal propensity in nature. However, I also find that environmental variation that triggers conditional dispersal behaviour may not impose selection on baseline dispersal rates. These findings imply that an increased rate of disturbance in natural systems has the potential to cause an evolutionary response in the life history of impacted organisms.