Global Phylogeography of Marine Synechococcus in Coastal Areas Reveals Strong Community Shifts.
Global Phylogeography of Marine Synechococcus in Coastal Areas Reveals Strong Community Shifts.
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DOI：
10.1128/msystems.00656-22
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发表时间：
2022-12-20
期刊：
影响因子：
6.4
通讯作者：
中科院分区：
文献类型：
--
作者：
海洋聚球藻是一个数量和生态上都很重要的浮游植物类群，在除极地海洋以外的所有海洋区域的碳循环和营养网络中发挥着重要作用。尽管它们在沿海地区丰度很高，但我们对这些环境中聚球藻群落的了解仅基于少数地方研究。在这里，我们使用海洋采样日（2014年6月21日）的全球宏基因组数据集，通过在141个微蓝细菌基因组的参考数据库上进行招募，获得全球沿海聚球藻群落的分类组成的快照，代表整个原绿球藻，聚球藻和蓝藻的多样性。这使我们能够解开激烈的社区变化的小到中等规模的梯度的环境因素，特别是沿着欧洲海岸。自然种群的地理和热生理特性的8个菌株，代表四个主要的聚球藻谱系（分支I至IV）的组合分析，也带来了新的见解的差异生态位分区的分支I和IV，最经常共同主导的聚球藻社区在寒冷和温带沿海地区。总之，这项研究揭示了几个重要的特点和特异性的沿海社区的聚球藻世界各地。重要信息聚球藻是地球上第二丰富的植物营养生物，其广泛的遗传多样性使其能够在除极地沃茨外的所有海洋中定居，不同的分支在不同的海洋生态位中定居。近年来，全球宏基因组学数据集的使用通过描述聚球藻分支或生态型在公海中的分布，极大地提高了我们对“谁在哪里”的认识。然而，很少有人知道聚球藻生态型在沿海地区的全球分布，聚球藻往往是占主导地位的植物营养生物。在这里，我们利用全球海洋采样日宏基因组学数据集来描述全球沿海地区的聚球藻群落组成，揭示了惊人的群落变化，特别是沿着欧洲海岸。由于温度是群落组成的重要驱动因素，我们还描述了8种聚球藻菌株的热偏好，为优势聚球藻分支对温度的适应带来了新的见解。
Marine Synechococcus comprise a numerically and ecologically prominent phytoplankton group, playing a major role in both carbon cycling and trophic networks in all oceanic regions except in the polar oceans. Despite their high abundance in coastal areas, our knowledge of Synechococcus communities in these environments is based on only a few local studies. Here, we use the global metagenome data set of the Ocean Sampling Day (June 21st, 2014) to get a snapshot of the taxonomic composition of coastal Synechococcus communities worldwide, by recruitment on a reference database of 141 picocyanobacterial genomes, representative of the whole Prochlorococcus, Synechococcus, and Cyanobium diversity. This allowed us to unravel drastic community shifts over small to medium scale gradients of environmental factors, in particular along European coasts. The combined analysis of the phylogeography of natural populations and the thermophysiological characterization of eight strains, representative of the four major Synechococcus lineages (clades I to IV), also brought novel insights about the differential niche partitioning of clades I and IV, which most often co-dominate the Synechococcus community in cold and temperate coastal areas. Altogether, this study reveals several important characteristics and specificities of the coastal communities of Synechococcus worldwide. IMPORTANCE Synechococcus is the second most abundant phytoplanktonic organism on Earth, and its wide genetic diversity allowed it to colonize all the oceans except for polar waters, with different clades colonizing distinct oceanic niches. In recent years, the use of global metagenomics data sets has greatly improved our knowledge of “who is where” by describing the distribution of Synechococcus clades or ecotypes in the open ocean. However, little is known about the global distribution of Synechococcus ecotypes in coastal areas, where Synechococcus is often the dominant phytoplanktonic organism. Here, we leverage the global Ocean Sampling Day metagenomics data set to describe Synechococcus community composition in coastal areas worldwide, revealing striking community shifts, in particular along the coasts of Europe. As temperature appears as an important driver of the community composition, we also characterize the thermal preferenda of 8 Synechococcus strains, bringing new insights into the adaptation to temperature of the dominant Synechococcus clades.
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影响因子：
12.3
作者：
Dufresne, Alexis;Ostrowski, Martin;Scanlan, David J.;Garczarek, Laurence;Mazard, Sophie;Palenik, Brian P.;Paulsen, Ian T.;de Marsac, Nicole Tandeau;Wincker, Patrick;Dossat, Carole;Ferriera, Steve;Johnson, Justin;Post, Anton F.;Hess, Wolfgang R.;Partensky, Frederic
通讯作者：
Partensky, Frederic
影响因子：
4.4
作者：
Fuller, NJ;Marie, D;Scanlan, DJ
通讯作者：
Scanlan, DJ
影响因子：
5.1
作者：
Haverkamp, Thomas;Acinas, Silvia G.;Stal, Lucas J.
通讯作者：
Stal, Lucas J.
影响因子：
3.3
作者：
Chandler, Jeremy W.;Lin, Yajuan;Zinser, Erik R.
通讯作者：
Zinser, Erik R.
全球海洋中原绿球藻和聚球藻的新谱系
影响因子：
11
作者：
Huang, Sijun;Wilhelm, Steven W.;Chen, Feng
通讯作者：
Chen, Feng