Interdependence of specialization and biodiversity in Phanerozoic marine invertebrates
Interdependence of specialization and biodiversity in Phanerozoic marine invertebrates
复制标题
显生宙海洋无脊椎动物的专业化和生物多样性的相互依赖性
DOI：
10.1038/ncomms7602
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发表时间：
2015
影响因子：
16.6
通讯作者：
Aberhan
中科院分区：
文献类型：
--
作者：
Nürnberg;Aberhan
对生物多样性动态的研究往往表明，多样性有上限，但人们对生态和进化过程之间复杂的相互作用以及生物和非生物因素的相对作用知之甚少，这些因素为多样性设定了上限。在这里，我们统计评估了显生宙全球生物多样性与海底海洋无脊椎动物栖息地专门化程度之间的关系。我们发现，在栖息地专业化的变化正相关的全球多样性的变化，也就是说，高多样性的时间与更专业的动物群相吻合。我们确定的多样性动态的专家，但不是通才，和起源率，但不是灭绝率，这种生态相互依存的主要驱动力。非生物因素未能显示出任何显着的关系，专业化。我们的研究结果表明，专业化的整体水平及其在进化时间尺度上的波动是由多样性依赖的过程控制的，这些过程是由生物体之间竞争有限资源的相互作用驱动的。
Studies of the dynamics of biodiversity often suggest that diversity has upper limits, but the complex interplay between ecological and evolutionary processes and the relative role of biotic and abiotic factors that set upper limits to diversity are poorly understood. Here we statistically assess the relationship between global biodiversity and the degree of habitat specialization of benthic marine invertebrates over the Phanerozoic eon. We show that variation in habitat specialization correlates positively with changes in global diversity, that is, times of high diversity coincide with more specialized faunas. We identify the diversity dynamics of specialists but not generalists, and origination rates but not extinction rates, as the main drivers of this ecological interdependence. Abiotic factors fail to show any significant relationship with specialization. Our findings suggest that the overall level of specialization and its fluctuations over evolutionary timescales are controlled by diversity-dependent processes—driven by interactions between organisms competing for finite resources.