Archaeal Diversity and Spatial Distribution in the Surface Sediment of the South China Sea

Archaeal Diversity and Spatial Distribution in the Surface Sediment of the South China Sea
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南海表层沉积物古菌多样性及空间分布

DOI:
10.1080/01490451.2013.797522
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发表时间:
2014-01
影响因子:
2.3
通讯作者:
Zhang, Chuanlun L.
Zhang, Chuanlun L.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Wang, Peng;Wei, Yuli;Li, Tao;Li, Fuyan;Meng, Jun;Zhang, Chuanlun L.

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浮游植物是海洋沉积物中生物量的重要组成部分,在全球碳循环中可能发挥重要作用。然而,深海沉积物的特性和组成尚不清楚。本文利用古菌16S rRNA基因引物对南海浅海(<100 m)和深水(>1500 m)沉积物中的古菌进行了多样性和群落结构分析。在系统发育上,古菌群落分为浅海和深海沉积物,前者以Thaumarchaeota为主,后者由海洋底栖类群B、E和南非金矿Euryarchaeotal类群以及Thaumarchaeota为主。砂含量与Thaumarchaeota具有显著的相关性,表明多孔介质可能创造了一个好氧环境,使这些好氧生物在表层沉积物中茁壮成长。总有机碳的碳同位素组成与古生菌群的分布显著相关,表明古生菌群的整体分布可能受到南海沉积物中有机碳的有效性或来源的制约。
Archaea represent a significant portion of biomass in the marine sediments and may play an important role in global carbon cycle. However, the identity and composition of deep sea sediment Archaea are unclear. Here, we used the archaeal 16S rRNA gene primers to determine the diversity and community structure of Archaea from shallow water (<100 m) and deep water (>1500 m) sediments in the South China Sea. Phylogenetically the archaeal community is separated between the shallow- and deep sea sediments, with the former being dominated by the Thaumarchaeota and the latter by the Marine Benthic Group B, E and the South African GoldMine Euryarchaeotal Group as well as Thaumarchaeota. Sand content showed significant correlation with Thaumarchaeota, suggesting that the porous media may create an oxic environment that allowed these aerobic organisms to thrive in the surface sediments. The carbon isotope composition of total organic carbon was significantly correlated to the distribution of archaeal groups, suggesting that Archaea overall may be constrained by the availability or sources of organic carbon in the sediments of the South China Sea.
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