Experimental niche evolution alters the strength of the diversity-productivity relationship
Experimental niche evolution alters the strength of the diversity-productivity relationship
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DOI：
10.1038/nature09592
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发表时间：
2011-01-06
期刊：
影响因子：
64.8
通讯作者：
Mouquet, Nicolas
中科院分区：
文献类型：
--
作者：
Gravel, Dominique;Bell, Thomas;Mouquet, Nicolas
生物多样性与生态系统功能（BEF）之间的关系已成为群落和生态系统生态学的基石（1-3），也是保护生物学和政策规划决策的重要标准（4,5）。最近有人提出，进化史应该影响BEF关系，因为它决定了物种特征，从而决定了物种开发资源的能力（6,7）。在这里，我们通过结合实验进化和BEF实验来验证这一假设。我们从海洋环境中分离出20种细菌菌株，并将其进化为通才或专才(8)。然后，我们测试了进化史对由专才、通才和祖先组成的1到20个物种组合的BEF关系强度的影响(9)。一般来说，通才团队的生产力更高，因为他们利用环境异质性的能力更强（10）。然而，由于生态位互补性增强，专家组合的BEF关系斜率更大。这些结果表明，BEF关系如何严重依赖于过去进化事件的遗产。
The relationship between biodiversity and ecosystem functioning (BEF) has become a cornerstone of community and ecosystem ecology(1-3) and an essential criterion for making decisions in conservation biology and policy planning(4,5). It has recently been proposed that evolutionary history should influence the BEF relationship because it determines species traits and, thus, species' ability to exploit resources(6,7). Here we test this hypothesis by combining experimental evolution with a BEF experiment. We isolated 20 bacterial strains from a marine environment and evolved each to be generalists or specialists(8). We then tested the effect of evolutionary history on the strength of the BEF relationship with assemblages of 1 to 20 species constructed from the specialists, generalists and ancestors(9). Assemblages of generalists were more productive on average because of their superior ability to exploit the environmental heterogeneity(10). The slope of the BEF relationship was, however, stronger for the specialist assemblages because of enhanced niche complementarity. These results show how the BEF relationship depends critically on the legacy of past evolutionary events.