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首页> 外文期刊>Marine ecology progress series >Immigration of prokaryotes to local environments enhances remineralization efficiency of sinking particles: a metacommunity model
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Immigration of prokaryotes to local environments enhances remineralization efficiency of sinking particles: a metacommunity model

机译：原核生物向当地环境的迁移提高了沉没颗粒的再矿化效率：一种元社区模型

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摘要

Processing of organic matter by hetero-trophic prokaryotes regulates carbon sequestration in the ocean, and thus influences the global climate. Recent studies have begun to elucidate the remarkable diversity of oceanic prokaryotes with estimates of >1000 species or phylotypes in a single local habitat and up to 2 million in the global ocean. However, how this prokaryotic diversity and spatial heterogeneity in their compositions contribute to regional variations in major biogeochemical fluxes driven by heterotrophic prokaryotes is still unclear. A new theoretical model integrating the metacommunity concept with oceanic biogeochemistry demonstrates that increased production of particulate organic carbon (POC) leads to increased efficiency of remineralization of POC in the surface ocean, affecting the carbon export to deep waters. This is attributed to flexible shifts in the local prokaryotic community composition in response to changes in primary production, which is facilitated by the high degree of diversity in the metacommunity and moderate immigration rates of prokaryotes into the local community. By linking the spatial heterogeneity of microbial communities to their transient dynamics, a metacommunity concept will improve our understanding of the regional variability of biogeochemical processes in the oceans.
机译：异养原核生物对有机物的处理调节了海洋中的碳固存，从而影响了全球气候。最近的研究已经开始阐明海洋原核生物的显着多样性，据估计在一个单一的栖息地中有1000多种物种或系统型，在全球海洋中多达200万种。然而，这种原核生物多样性和空间异质性如何构成由异养原核生物驱动的主要生物地球化学通量的区域变化仍不清楚。将元社区概念与海洋生物地球化学相结合的新理论模型表明，增加的颗粒有机碳（POC）产量导致表层海洋中POC的再矿化效率提高，从而影响了向深水的碳出口。这归因于响应于初级生产变化的本地原核生物群落组成的灵活变化，这是由于原核生物的高度的多样性和适度的原核生物向本地社区的迁移所推动的。通过将微生物群落的空间异质性与其瞬态动力学联系起来，一个元社区概念将增进我们对海洋生物地球化学过程的区域变异性的理解。

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