期刊
NATURE GEOSCIENCE
卷 8, 期 4, 页码 299-304出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NGEO2387
关键词
-
资金
- US National Science Foundation (NSF)
- Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
- European Consortium for Ocean Research Drilling
- the Ministry of Science and Technology (People's Republic of China)
- Korea Institute of Geoscience and Mineral Resources
- Australian Research Council
- New Zealand Institute for Geological and Nuclear Sciences
- Ministry of Earth Sciences (India)
- NSF Division of Ocean Sciences [0939564, 1130735, 1433150]
- Japan Society for the Promotion of Science (JSPS) [26251041, 24651018, 24687004, GR102]
- Deutsche Forschungsgemeinschaft
- NERC [NE/J006149/1, NE/L000024/1, NE/J005282/1] Funding Source: UKRI
- Natural Environment Research Council [NE/J006149/1, NE/J005282/1, NE/L000024/1] Funding Source: researchfish
- Directorate For Geosciences
- Division Of Ocean Sciences [1130735, 1433150] Funding Source: National Science Foundation
- Division Of Ocean Sciences
- Directorate For Geosciences [0939564] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [24687004, 26251041, 24651018, 25610164, 13J10453] Funding Source: KAKEN
- National Research Foundation of Korea [22A20130012692] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The depth of oxygen penetration into marine sediments differs considerably from one region to another1,2. In areas with high rates of microbial respiration, O-2 penetrates only millimetres to centimetres into the sediments(3), but active anaerobic microbial communities are present in sediments hundreds of metres or more below the sea floor(4-7). In areas with low sedimentary respiration, O-2 penetratesmuchdeeper(8-12) but the depth to which microbial communities persist was previously unknown(9,10,13). The sediments underlying the South Pacific Gyre exhibit extremely low areal rates of respiration(9). Here we show that, in this region, microbial cells and aerobic respiration persist through the entire sediment sequence to depths of at least 75 metres below sea floor. Based on the Redfield stoichiometry of dissolved O-2 and nitrate, we suggest that net aerobic respiration in these sediments is coupled to oxidation of marine organic matter. We identify a relationship of O-2 penetration depth to sedimentation rate and sediment thickness. Extrapolating this relationship, we suggest that oxygen and aerobic communities may occur throughout the entire sediment sequence in 15-44% of the Pacific and 9-37% of the global sea floor. Subduction of the sediment and basalt from these regions is a source of oxidized material to the mantle.
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