Sediment microbial assemblage structure is modified by marine polychaete gut passage.

Sediment microbial assemblage structure is modified by marine polychaete gut passage.
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沉积物微生物组合结构被海洋多毛类肠道通道改变。

DOI:
10.1093/femsec/fiz047
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发表时间:
2019
影响因子:
4.2
通讯作者:
Dale H
Dale H
中科院分区:
生物学3区
文献类型:
--
作者:
Dale H

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沉积物中的无脊椎动物活动,主要是颗粒和孔隙水的再分配,是众所周知的,以调节相关的微生物组合的结构,然而,相对较少的关注已经给予沉积物的摄食,肠道通道和排泄的影响沉积物喂养的无脊椎动物。在这里,我们使用高通量测序和定量PCR来研究如何通过肠道的海洋多毛类Hediste多样性影响细菌和古菌组合的结构和丰富的氮循环类群。我们发现,消化道的H。diversicolor包含独特的短暂的微生物组合,在肠道通道,变得更像周围的沉积物组合。富集类似的微生物类群在后肠和洞穴壁表明,这些短暂的肠道组合可能会影响当地沉积物群落的组成。H.多样的颜色也形成了独特的氨氧化古菌类群的水库。此外,不同的微生物组合的外部多毛类表面表明,沉积物喂养的无脊椎动物作为载体之间的沉积物补丁运输微生物。总的来说,这些研究结果表明,沉积物和相关的微生物组合通过肠道的存款喂养无脊椎动物的通道可能发挥重要作用,在调节沉积物微生物组合和生物地球化学功能。
Invertebrate activities in sediments, predominantly the redistribution of particles and porewater, are well-known to regulate the structure of associated microbial assemblages; however, relatively little attention has been given to the effects of sediment ingestion, gut passage and excretion by deposit-feeding invertebrates. Here, we use high-throughput sequencing and quantitative PCR to examine how passage through the gut of the marine polychaeteHediste diversicoloraffects the structure of bacterial and archaeal assemblages and the abundance of nitrogen cycling taxa. We show that the digestive tract ofH. diversicolorcontains unique transitory microbial assemblages that, during gut passage, become more like the surrounding sediment assemblages. Enrichment of similar microbial taxa in both the hindgut and the burrow wall suggest that these transitory gut assemblages may influence the composition of the local sediment community. The hindgut ofH. diversicoloralso forms a reservoir for unique ammonia-oxidising archaeal taxa. Furthermore, distinct microbial assemblages on external polychaete surfaces suggest that deposit-feeding invertebrates act as vectors that transport microbes between sediment patches. Collectively, these findings suggest that the passage of sediment and associated microbial assemblages through the gut of deposit feeding invertebrates is likely to play a significant role in regulating sediment microbial assemblages and biogeochemical functioning.
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