期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 117, 期 27, 页码 15911-15922出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1917494117
关键词
bioturbation; burrow ventilation; redox state; particle reworking; organic carbon sources
资金
- Swiss National Science Foundation Project [205321_163371]
- Independent Research Fund Denmark (G-Ice Project) [600 7014-00113B/FNU]
- Danish National Research Foundation
- European Research Council [294200]
- Swiss National Science Foundation (SNF) [205321_163371] Funding Source: Swiss National Science Foundation (SNF)
Through a process called bioturbation, burrowing macrofauna have altered the seafloor habitat and modified global carbon cycling since the Cambrian. However, the impact of macrofauna on the community structure of microorganisms is poorly understood. Here, we show that microbial communities across bioturbated, but geochemically and sedimentologically divergent, continental margin sites are highly similar but differ clearly from those in nonbioturbated surface and underlying subsurface sediments. Solidand solute-phase geochemical analyses combined with modeled bioturbation activities reveal that dissolved O-2 introduction by burrow ventilation is the major driver of archaeal community structure. By contrast, solid-phase reworking, which regulates the distribution of fresh, algal organic matter, is the main control of bacterial community structure. In nonbioturbated surface sediments and in subsurface sediments, bacterial and archaeal communities are more divergent between locations and appear mainly driven by sitespecific differences in organic carbon sources.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据