Potential roles of anaerobic ammonium and methane oxidation in the nitrogen cycle of wetland ecosystems |
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Authors: | Guibing Zhu Mike S M Jetten Peter Kuschk Katharina F Ettwig Chengqing Yin |
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Institution: | (1) State Key Laboratory of Environmental Aquatic Quality, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People’s Republic of China;(2) Institute for Water and Wetland Research, Department of Microbiology, Radboud University Nijmegen, Heyendaalse Weg135, 6525 AJ Nijmegen, The Netherlands;(3) Helmholtz-Centre for Environmental Research–UFZ, Permoserstrasse 15, 04318 Leipzig, Germany |
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Abstract: | Anaerobic ammonium oxidation (anammox) and anaerobic methane oxidation (ANME coupled to denitrification) with nitrite as electron
acceptor are two of the most recent discoveries in the microbial nitrogen cycle. Currently the anammox process has been relatively
well investigated in a number of natural and man-made ecosystems, while ANME coupled to denitrification has only been observed
in a limited number of freshwater ecosystems. The ubiquitous presence of anammox bacteria in marine ecosystems has changed
our knowledge of the global nitrogen cycle. Up to 50% of N2 production in marine sediments and oxygen-depleted zones may be attributed to anammox bacteria. However, there are only few
indications of anammox in natural and constructed freshwater wetlands. In this paper, the potential role of anammox and denitrifying
methanotrophic bacteria in natural and artificial wetlands is discussed in relation to global warming. The focus of the review
is to explore and analyze if suitable environmental conditions exist for anammox and denitrifying methanotrophic bacteria
in nitrogen-rich freshwater wetlands. |
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