Experimental evidence for a time-integrated effect of productivity on diversity
Experimental evidence for a time-integrated effect of productivity on diversity
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DOI：
10.1111/ele.12501
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发表时间：
2015-11-01
期刊：
影响因子：
8.8
通讯作者：
Armitage, David W.
中科院分区：
文献类型：
--
作者：
Armitage, David W.
时间-区域-生产力假说是对全球生物多样性梯度的一种解释。它预测，一个生物区的现代多样性是其面积和生产力的产物，在进化过程中整合。我进行了第一次实验测试的时间-面积-生产力假说使用模型系统的适应性辐射-细菌荧光假单胞菌SBW 25。我在各种生产力、空间范围和时间范围的培养条件下启动了数百次独立的辐射。时间综合生产力是现存表型多样性和丰富度的最佳预测因子。相比之下，现代环境变量在采样时的快照是不太有用的多样性模式的预测。这些结果是最好的解释显着变化的种群增长参数在不同的生产力处理和长期的站立多样性可以持续在非生产性栖息地。这些研究结果提供了第一个实验支持的时间综合生产力作为一个假定的驱动程序的区域生物多样性格局。
The time-area-productivity hypothesis is a proposed explanation for global biodiversity gradients. It predicts that a bioregion's modern diversity is the product of its area and productivity, integrated over evolutionary time. I performed the first experimental test of the time-area-productivity hypothesis using a model system for adaptive radiation - the bacterium Pseudomonas fluorescensSBW25. I initiated hundreds of independent radiations under culture conditions spanning a variety of productivities, spatial extents and temporal extents. Time-integrated productivity was the single best predictor of extant phenotypic diversity and richness. In contrast, snapshots' of modern environmental variables at the time of sampling were less useful predictors of diversity patterns. These results were best explained by marked variation in population growth parameters under different productivity treatments and the long periods over which standing diversity could persist in unproductive habitats. These findings provide the first experimental support for time-integrated productivity as a putative driver of regional biodiversity patterns.