Cargando…

Ubiquitous anaerobic ammonium oxidation in inland waters of China: an overlooked nitrous oxide mitigation process

Denitrification has long been regarded as the only pathway for terrestrial nitrogen (N) loss to the atmosphere. Here we demonstrate that large-scale anaerobic ammonium oxidation (anammox), an overlooked N loss process alternative to denitrification which bypasses nitrous oxide (N(2)O), is ubiquitous...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhu, Guibing, Wang, Shanyun, Zhou, Leiliu, Wang, Yu, Zhao, Siyan, Xia, Chao, Wang, Weidong, Zhou, Rong, Wang, Chaoxu, Jetten, Mike S. M., Hefting, Mariet M., Yin, Chengqing, Qu, Jiuhui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4661425/
https://www.ncbi.nlm.nih.gov/pubmed/26610807
http://dx.doi.org/10.1038/srep17306
Descripción
Sumario:Denitrification has long been regarded as the only pathway for terrestrial nitrogen (N) loss to the atmosphere. Here we demonstrate that large-scale anaerobic ammonium oxidation (anammox), an overlooked N loss process alternative to denitrification which bypasses nitrous oxide (N(2)O), is ubiquitous in inland waters of China and contributes significantly to N loss. Anammox rates in aquatic systems show different levels (1.0–975.9 μmol N m(−2) h(−1), n = 256) with hotspots occurring at oxic-anoxic interfaces and harboring distinct biogeochemical and biogeographical features. Extrapolation of these results to the China-national level shows that anammox could contribute about 2.0 Tg N yr(−1), which equals averagely 11.4% of the total N loss from China’s inland waters. Our results indicate that a significant amount of the nitrogen lost from inland waters bypasses denitrification, which is important for constructing more accurate climate models and may significantly reduce potential N(2)O emission risk at a large scale.