globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2420
论文题名:
Water column methanotrophy controlled by a rapid oceanographic switch
作者: Steinle L.; Graves C.A.; Treude T.; Ferré B.; Biastoch A.; Bussmann I.; Berndt C.; Krastel S.; James R.H.; Behrens E.; Böning C.W.; Greinert J.; Sapart C.-J.; Scheinert M.; Sommer S.; Lehmann M.F.; Niemann H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:5
起始页码: 378
结束页码: 382
语种: 英语
Scopus关键词: community structure ; global ocean ; greenhouse gas ; methane ; methanogenic bacterium ; methanotrophy ; nearshore dynamics ; numerical model ; oceanography ; oxic conditions ; oxidation ; redox potential ; sea ice ; seafloor ; seepage ; water column ; water mass ; Atlantic Ocean ; West Spitsbergen Current
英文摘要: Large amounts of the greenhouse gas methane are released from the seabed to the water column, where it may be consumed by aerobic methanotrophic bacteria. The size and activity of methanotrophic communities, which determine the amount of methane consumed in the water column, are thought to be mainly controlled by nutrient and redox dynamics. Here, we report repeated measurements of methanotrophic activity and community size at methane seeps west of Svalbard, and relate them to physical water mass properties and modelled ocean currents. We show that cold bottom water, which contained a large number of aerobic methanotrophs, was displaced by warmer water with a considerably smaller methanotrophic community within days. Ocean current simulations using a global ocean/sea-ice model suggest that this water mass exchange is consistent with short-term variations in the meandering West Spitsbergen Current. We conclude that the shift from an offshore to a nearshore position of the current can rapidly and severely reduce methanotrophic activity in the water column. Strong fluctuating currents are common at many methane seep systems globally, and we suggest that they affect methane oxidation in the water column at other sites, too. © 2015 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106226
Appears in Collections:气候减缓与适应
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作者单位: Department of Environmental Sciences, University of Basel, Basel, Switzerland; GEOMAR, Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Ocean and Earth Science, National Oceanography Centre Southampton, Southampton, United Kingdom; CAGE-Centre for Arctic Gas Hydrate Environment and Climate, Department of Geology, University of Tromsø, Tromsø, Norway; Alfred Wegener Institute, Marine Station Helgoland, Helgoland, Germany; Institute of Geosciences, University of Kiel, Kiel, Germany; National Institute of Water and Atmospheric Research, Wellington, New Zealand; Royal Netherlands Institute for Sea Research NIOZ, AB Den Burg, Texel, Netherlands; Laboratoire de Glaciologie, Université Libre de Bruxelles, Brussels, Belgium; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; University of California, Department of Earth, Planetary and Space Sciences and Atmospheric and Oceanic Sciences, Los Angeles, CA, United States

Recommended Citation:
Steinle L.,Graves C.A.,Treude T.,et al. Water column methanotrophy controlled by a rapid oceanographic switch[J]. Nature Geoscience,2015-01-01,8(5)
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