Articles | Volume 16, issue 24
Biogeosciences, 16, 4765–4781, 2019
https://doi.org/10.5194/bg-16-4765-2019
Biogeosciences, 16, 4765–4781, 2019
https://doi.org/10.5194/bg-16-4765-2019

Research article 16 Dec 2019

Research article | 16 Dec 2019

Major role of ammonia-oxidizing bacteria in N2O production in the Pearl River estuary

Li Ma et al.

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Cited articles

Abell, G. C. J., Revill, A. T., Smith, C., Bissett, A. P., Volkman, J. K., and Robert, S. S.: Archaeal ammonia oxidizers and nirS-type denitrifiers dominate sediment nitrifying and denitrifying populations in a subtropical macrotidal estuary, ISME J., 4, 286–300, 2010. 
Abril, G., Riou, S. A., Etcheber, H., Frankignoulle, M., de Wit, R., and Middelburg, J. J.: Transient tidal time-scale, nitrogen transformations in an estuarine turbidity maximumfluid mud system (the Gironde, south-west France), Estuar. Coast. Shelf S., 50, 703–715, 2000. 
Allen, D., Dalal, R. C., Rennenberg, H., and Schmidt, S.: Seasonal variation in nitrous oxide and methane emissions from subtropical estuary and coastal mangrove sediments, Australia, Plant Biol., 13, 126–133, 2011. 
Arévalo-Martínez, D. L., Kock, A., Löscher, C. R., Schmitz, R. A., and Bange, H. W.: Massive nitrous oxide emissions from the tropical South Pacific Ocean, Nat. Geosci., 8, 530–533, 2015. 
Avrahami, S. and Bohanann, J. M.: N2O emission rates in a California meadow soil are influenced by fertilizer level, soil moisture and the community structure of ammonia-oxidizing bacteria, Glob. Change Biol., 15, 643–655, 2009. 
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Short summary
The major microbial process producing N2O in estuarine ecosystems remains controversial. Combining the concentrations and isotopic compositions of N2O, distributions and transcript levels of ammonia-oxidizing bacterial and archaeal amoA and denitrifier nirS genes, and in situ incubation estimates of nitrification rates and N2O production rates, we clarified that ammonia-oxidizing bacteria contributed the major part in N2O production in the upper Pearl River estuary despite their low abundance.
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