Oxidation of urea-derived nitrogen by thaumarchaeota-dominated marine nitrifying communities.

  title={Oxidation of urea-derived nitrogen by thaumarchaeota-dominated marine nitrifying communities.},
  author={Bradley B Tolar and Natalie J. Wallsgrove and Brian N Popp and James T Hollibaugh},
  journal={Environmental microbiology},
  volume={19 12},
Urea nitrogen has been proposed to contribute significantly to nitrification by marine thaumarchaeotes. These inferences are based on distributions of thaumarchaeote urease genes rather than activity measurements. We found that ammonia oxidation rates were always higher than oxidation rates of urea-derived N in samples from coastal Georgia, USA (means ± SEM: 382 ± 35 versus 73 ± 24 nmol L-1  d-1 , Mann-Whitney U-test p < 0.0001), and the South Atlantic Bight (20 ± 8.8 versus 2.2 ± 1.7 nmol L-1… CONTINUE READING
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