Diversity and metabolic energy in bacteria.

Diversity and metabolic energy in bacteria.
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DOI:
10.1093/femsle/fnad043
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发表时间:
2023-01-17
影响因子:
2.1
通讯作者:
--
中科院分区:
生物学4区
文献类型:
--
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为什么有些细菌群比其他细菌群更多样化?我们假设细菌功能群(生物地球化学群或“行会”)可用的代谢能量在这种群体的分类多样性中起作用。我们通过观察多个生物群系中功能群的元群落多样性来验证这一假设。我们观察到一个官能团的多样性和他们的代谢能量产量之间的正相关估计。此外,这种关系的斜率在所有生物群系中都是相似的。这些发现可能暗示存在一种以相同方式控制所有生物群系中所有功能群多样性的普遍机制。我们考虑了各种可能的解释,从经典(环境变化)到“非达尔文”(漂移屏障效应)。不幸的是,这些解释并不是相互排斥的,要更深入地了解细菌多样性的最终原因,我们需要确定群体遗传学的关键参数(有效群体大小、突变率和选择梯度)是否以及如何在功能群之间和环境条件下变化:这是一项艰巨的任务。一组细菌的多样性似乎与它从驱动新陈代谢的化学物质中获得的能量有关。
Why are some groups of bacteria more diverse than others? We hypothesize that the metabolic energy available to a bacterial functional group (a biogeochemical group or ‘guild’) has a role in such a group’s taxonomic diversity. We tested this hypothesis by looking at the metacommunity diversity of functional groups in multiple biomes. We observed a positive correlation between estimates of a functional group’s diversity and their metabolic energy yield. Moreover, the slope of that relationship was similar in all biomes. These findings could imply the existence of a universal mechanism controlling the diversity of all functional groups in all biomes in the same way. We consider a variety of possible explanations from the classical (environmental variation) to the ‘non-Darwinian’ (a drift barrier effect). Unfortunately, these explanations are not mutually exclusive, and a deeper understanding of the ultimate cause(s) of bacterial diversity will require us to determine if and how the key parameters in population genetics (effective population size, mutation rate, and selective gradients) vary between functional groups and with environmental conditions: this is a difficult task. The diversity of a group of bacteria appears to be related to the energy it can gain from the chemicals it uses to drive its metabolism.
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期刊: PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES
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