Vertical diversity and association pattern of total, abundant and rare microbial communities in deep-sea sediments.
Vertical diversity and association pattern of total, abundant and rare microbial communities in deep-sea sediments.
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深海沉积物中总、丰富和稀有微生物群落的垂直多样性和关联格局
DOI：
10.1111/mec.15937
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发表时间：
2021-06
影响因子：
4.9
通讯作者：
Liu J
中科院分区：
文献类型：
--
作者：
Zhang Y;Yao P;Sun C;Li S;Shi X;Zhang XH;Liu J
海洋沉积物中的微生物丰度和群落组成已被广泛探索。然而，底栖微生物多样性和共生模式的高分辨率垂直变化描述不足。沉积物中丰富和稀有物种的生态贡献在很大程度上仍然未知。本文通过分析在南海获得的10个亚海底沉积物柱样（水深1，250 - 3，530 m）的14个深度层的微生物种群，提供了微生物β多样性的垂直剖面和受不同丰度亚群落影响的共生。134个沉积物样品按沉积深度（1-2、6-10、30-90和190-790 cm）分为4类，微生物群落组成发生明显变化。微生物的垂直演替与氧化还原分带一致，并受到陆地输入的影响。垂直β多样性的划分显示深层和表层之间的物种替换非常高，表明选择引起的稀有物种的损失以及休眠细胞和孢子的传播。相比之下，对于水平β多样性，稀有物种的丰富度在深层沉积物中变得越来越重要。伴随着这种β-多样性分布的是关联模式的明显变化，微生物在更深的沉积层中的联系较少，可能反映了互养相互作用的减少。稀有物种在共现网络中占有不可或缺的比例，并倾向于形成复杂的“小世界”。与丰富亚群落相比，稀有亚群落对各种环境因子的反应也不同。我们的研究结果扩展了目前的知识海洋底栖微生物多样性的垂直变化及其关联模式，强调稀有物种的潜在作用。
Microbial abundance and community composition in marine sediments have been widely explored. However, high‐resolution vertical changes of benthic microbial diversity and co‐occurrence patterns are poorly described. The ecological contributions of abundant and rare species in sediments also remain largely unknown. Here, by analysing microbial populations at 14 depth layers of 10 subseafloor sediment cores (water depth 1,250–3,530 m) obtained in the South China Sea, we provided the vertical profiles of microbial β‐diversity and co‐occurrence influenced by subcommunities of different abundance. These 134 sediment samples were clustered into four groups according to sediment depth (1–2, 6–10, 30–90 and 190–790 cm) with obvious shifts in microbial community compositions. The vertical succession of microorganisms was consistent with redox zonation and influenced by terrestrial inputs. Partitioning of vertical β‐diversity showed extremely high species replacement between deep layers and the surface layer, indicating selection‐induced loss of rare species and dispersal of dormant cells and spores. By contrast, for horizontal β‐diversity, richness of rare species became increasingly significant in deep sediments. Accompanying this β‐diversity profile were clear changes in the association pattern, with microorganisms being less connected in deeper sediment layers, probably reflecting reduced syntrophic interactions. Rare species accounted for an indispensable proportion in the co‐occurrence network, and tended to form complex “small worlds.” The rare subcommunity also responded differently to various environmental factors compared with the abundant subcommunity. Our findings expand current knowledge on vertical changes of marine benthic microbial diversity and their association patterns, emphasizing the potential roles of rare species.
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DOI：
10.1038/s41396-018-0253-3
发表时间：
2019-01
期刊：
The ISME journal
影响因子：
--
作者：
Hoshino T;Inagaki F
通讯作者：
Inagaki F
影响因子：
1.4
作者：
Apprill, Amy;McNally, Sean;Weber, Laura
通讯作者：
Weber, Laura
影响因子：
56.9
作者：
D'Hondt, S;Jorgensen, BB;Acosta, JLS
通讯作者：
Acosta, JLS
将碎片化景观中的物种丰富度变化与β多样性的空间周转解耦
影响因子：
2.7
作者：
Hu, Guang;Wilson, Maxwell C.;Yu, Mingjian
通讯作者：
Yu, Mingjian
影响因子：
4.5
作者：
Cai, WJ;Wang, Y
通讯作者：
Wang, Y