Plankton networks driving carbon export in the oligotrophic ocean.
Plankton networks driving carbon export in the oligotrophic ocean.
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DOI：
10.1038/nature16942
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发表时间：
2016-04-28
期刊：
影响因子：
64.8
通讯作者：
Gorsky G
中科院分区：
文献类型：
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作者：
Guidi L;Chaffron S;Bittner L;Eveillard D;Larhlimi A;Roux S;Darzi Y;Audic S;Berline L;Brum J;Coelho LP;Espinoza JCI;Malviya S;Sunagawa S;Dimier C;Kandels-Lewis S;Picheral M;Poulain J;Searson S;Tara Oceans coordinators;Stemmann L;Not F;Hingamp P;Speich S;Follows M;Karp-Boss L;Boss E;Ogata H;Pesant S;Weissenbach J;Wincker P;Acinas SG;Bork P;de Vargas C;Iudicone D;Sullivan MB;Raes J;Karsenti E;Bowler C;Gorsky G
生物碳泵是通过光合作用将二氧化碳转化为有机碳，通过下沉颗粒输出，并最终在深海中隔离的过程。虽然泵的强度与浮游生物群落组成相关，但驱动这一过程的基本生态系统结构在很大程度上仍未被描述。在这里，我们使用塔拉海洋考察期间收集的环境和宏基因组数据，以提高我们对贫营养海洋碳输出的理解。我们发现，特定的浮游生物群落，从表面和深层叶绿素最大值，与碳出口在150米，突出意想不到的类群，如放射虫，蜂窝状寄生虫，以及聚球藻和他们的寄生虫，作为谱系最强烈的亚热带，营养枯竭，贫营养的海洋与碳出口。此外，我们发现，只有少数细菌和病毒基因的相对丰度可以预测这些地区碳输出的大部分变化。
The biological carbon pump is the process by which CO2 is transformed to organic carbon via photosynthesis, exported through sinking particles, and finally sequestered in the deep ocean. While the intensity of the pump correlates with plankton community composition, the underlying ecosystem structure driving the process remains largely uncharacterised. Here we use environmental and metagenomic data gathered during the Tara Oceans expedition to improve our understanding of carbon export in the oligotrophic ocean. We show that specific plankton communities, from the surface and deep chlorophyll maximum, correlate with carbon export at 150 m and highlight unexpected taxa such as Radiolaria, alveolate parasites, as well as Synechococcus and their phages, as lineages most strongly associated with carbon export in the subtropical, nutrient-depleted, oligotrophic ocean. Additionally, we show that the relative abundance of just a few bacterial and viral genes can predict most of the variability in carbon export in these regions.