Studies of adaptive radiation using model microbial systems
Studies of adaptive radiation using model microbial systems
复制标题
DOI：
10.1086/303414
复制
发表时间：
2000-10-01
影响因子：
2.9
通讯作者：
Rainey, PB
中科院分区：
文献类型：
--
作者：
Travisano, M;Rainey, PB
适应性辐射是生物多样性进化的一个基本过程。季节性、资源分配和空间异质性的影响已经通过实验研究了微生物种群的进化。在所有环境条件下，生态相互作用对适应性辐射的可能性和结果有很大的影响。季节性环境中的适应性辐射可能由于人口平衡和代谢物的排泄而产生。即使在没有时间或空间异质性的情况下，资源划分也可能发生。生长产生的空间异质性足以产生微环境和随后的适应性辐射。然而，维持多样性的生态相互作用可能对环境条件的轻微变化敏感。实验室微生物群是理想的模型系统，用于测试适应性辐射的必要因素。
Adaptive radiation is a fundamental process in the evolution of biodiversity. The effects of seasonality, resource partitioning, and spatial heterogeneity have been examined experimentally using evolving populations of microbes. In all environmental conditions examined, ecological interactions have large effect on the likelihood and outcome of adaptive radiation. Adaptive radiation in seasonal environments can arise because of demographic trade-offs and excretion of metabolites. Resource partitioning can occur even in the absence of temporal or spatial heterogeneity. Spatial heterogeneity arising via growth is sufficient to generate microenvironments and subsequent adaptive radiation. However, ecological interactions maintaining diversity can be sensitive to slight alterations of the environmental conditions. Laboratory populations of microbes are ideal model systems to test the factors essential for adaptive radiation.