Tight association between microbial eukaryote and giant virus communities in the Arctic Ocean
Tight association between microbial eukaryote and giant virus communities in the Arctic Ocean
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DOI：
10.1002/lno.12086
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发表时间：
2022-04
影响因子：
4.5
通讯作者：
Jun Xia;S. Kameyama;Florian Prodinger;Takashi Yoshida;Kyoung‐Ho Cho;Jinyoung Jung;Sung-Ho Kang
中科院分区：
文献类型：
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作者：
Jun Xia;S. Kameyama;Florian Prodinger;Takashi Yoshida;Kyoung‐Ho Cho;Jinyoung Jung;Sung-Ho Kang
病毒是海洋微生物群落包括微真核生物的重要调控因子。然而，人们对它们在北极海盆北方楚科奇海的作用知之甚少，那里在夏季具有贫营养条件。为了阐明微生物真核生物群落与病毒以及环境条件之间的联系，我们研究了微真核生物（从3至144 μm和从海水中收集的0.23 μm大小的生物颗粒）和Imitervirales（从海水中收集的0.23 μm大小的生物颗粒）的群落结构，Imitervirales是感染海洋微真核生物的主要病毒群。据我们所知，没有研究调查了北冰洋的Imitervirales和真核生物群落。2018年夏天，在楚科奇海东北部和博福特环流（邻近海）外的邻近地区以及海冰上的两个融化池收集了地表水样本。在海洋站，营养盐浓度低，在大多数的位置，除了在邻近海域的货架。即使在环境条件相对同质的楚科奇海东北部，真核生物和伊特病毒目之间的群落变化也显着相关。真核生物群落与病毒群落的相关性强于地理和理化环境因子。这些结果表明，即使在北冰洋寒冷和贫营养的海水中，Imitervirales也会积极感染其宿主。
Viruses are important regulatory factors of the marine microbial community including microeukaryotes. However, little is known about their role in the northern Chukchi Sea in the Arctic basin, which has oligotrophic conditions in summer. To clarify the link between microbial eukaryotic communities and viruses as well as environmental conditions, we investigated the community structures of microeukaryotes (from 3 to144 μm and from 0.23 μm size bio‐particles collected from seawater) and Imitervirales (from 0.23 μm size bio‐particles collected from seawater), a dominant group of viruses infecting marine microeukaryotes. To the best of our knowledge, no study has investigated both Imitervirales and eukaryotic communities in the Arctic Ocean. Surface water samples were collected at 21 ocean stations located in the northeastern Chukchi Sea and an adjacent area outside the Beaufort Gyre (Adjacent Sea), and at two melt ponds on sea ice in the summer of 2018. At the ocean stations, nutrient concentrations were low in most of the locations, except the shelf in the adjacent sea. The community variations were significantly correlated between eukaryotes and Imitervirales, even within the northeastern Chukchi Sea characterized by relatively homogeneous environmental conditions. The association of the eukaryotic community with the viral community was stronger than that with geographical and physicochemical environmental factors. These results suggest that Imitervirales actively infect their hosts even in the cold and oligotrophic seawater in the Arctic Ocean.