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Journal article
Ammonia oxidation and ammonia-oxidizing bacteria and archaea from estuaries with differing histories of hypoxia
International Society for Microbial Ecology, Vol.1, pp.660-662
1
2007
PMID: 18043673
Web of Science ID: WOS:000250894300009
Abstract
Nitrification, the oxidation of NH₄⁺ to NO₂⁻ and subsequently to NO₃⁻ , plays a central role in the nitrogen cycle and is often a critical first step in nitrogen removal from estuarine and coastal environments. The first and rate-limiting step in nitrification is catalyzed by the enzyme ammonia monooxygenase (AmoA). We evaluate the relationships between the abundance of ammoniaoxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) amoA genes; potential nitrification rates and environmental variables to identify factors influencing AOA abundance and nitrifier activity in estuarine sediments. Our results showed that potential nitrification rates increased as abundance of AOA amoA increased. In contrast, there was no relationship between potential nitrification rates and AOB amoA abundance. This suggests that AOA are significant in estuarine nitrogen cycling. Surprisingly, more of the variability in potential nitrification rates was predicted by salinity and pore water sulfide than by dissolved oxygen history.
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Details
- Title
- Ammonia oxidation and ammonia-oxidizing bacteria and archaea from estuaries with differing histories of hypoxia
- Publication Details
- International Society for Microbial Ecology, Vol.1, pp.660-662
- Resource Type
- Journal article
- Publisher
- Nature Publishing Group; London
- Series
- 1
- Copyright
- 2007 International Society for Microbial Ecology
- Identifiers
- WOS:000250894300009; 99380090614106600
- Academic Unit
- Biology; Center for Environmental Diagnostics and Bioremediation ; Hal Marcus College of Science and Engineering
- Language
- English