The Ocean's labile DOC supply chain
The Ocean's labile DOC supply chain
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DOI：
10.1002/lno.12053
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发表时间：
2022-03-05
影响因子：
4.5
通讯作者：
Uchimiya, Mario
中科院分区：
文献类型：
--
作者：
Moran, Mary Ann;Ferrer-Gonzalez, Frank X.;Uchimiya, Mario
海洋表面的微生物在几分钟到几天的时间尺度上释放、消耗和交换不稳定的代谢物。全球碳循环中这一重要步骤的细节仍然没有得到很好的解决，这主要是由于研究几乎同时产生和消耗的各种代谢物的方法学挑战。从这个角度来看，一个新的汇编公布的数据建立在以前的研究，以获得海洋净初级生产的一部分，通过不稳定的溶解有机碳（DOC）池的最新估计。与以前的研究一致，我们的数据挖掘和建模方法假设，大约一半的海洋净初级生产力是通过不稳定的DOC池处理。三个主要来源的贡献率估计为0.4活浮游植物，0.4死亡和垂死的浮游植物，和0.2异养微生物和浮游生物。
Microbes of the surface ocean release, consume, and exchange labile metabolites at time scales of minutes to days. The details of this important step in the global carbon cycle remain poorly resolved, largely due to the methodological challenges of studying a diverse pool of metabolites that are produced and consumed nearly simultaneously. In this perspective, a new compilation of published data builds on previous studies to obtain an updated estimate of the fraction of marine net primary production that passes through the labile dissolved organic carbon (DOC) pool. In agreement with previous studies, our data mining and modeling approaches hypothesize that about half of ocean net primary production is processed through the labile DOC pool. The fractional contributions from three major sources are estimated at 0.4 for living phytoplankton, 0.4 for dead and dying phytoplankton, and 0.2 for heterotrophic microbes and mesoplankton.