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Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology

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Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology. / Lansdown, K.; McKew, B. A.; Whitby, C. et al.
In: Nature Geoscience, Vol. 9, No. 5, 05.2016, p. 357-360.

Research output: Contribution to Journal/MagazineLetterpeer-review

Harvard

Lansdown, K, McKew, BA, Whitby, C, Heppell, CM, Dumbrell, AJ, Binley, AM, Olde, L & Trimmer, M 2016, 'Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology', Nature Geoscience, vol. 9, no. 5, pp. 357-360. https://doi.org/10.1038/NGEO2684

APA

Lansdown, K., McKew, B. A., Whitby, C., Heppell, C. M., Dumbrell, A. J., Binley, A. M., Olde, L., & Trimmer, M. (2016). Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology. Nature Geoscience, 9(5), 357-360. https://doi.org/10.1038/NGEO2684

Vancouver

Lansdown K, McKew BA, Whitby C, Heppell CM, Dumbrell AJ, Binley AM et al. Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology. Nature Geoscience. 2016 May;9(5):357-360. Epub 2016 Mar 28. doi: 10.1038/NGEO2684

Author

Lansdown, K. ; McKew, B. A. ; Whitby, C. et al. / Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology. In: Nature Geoscience. 2016 ; Vol. 9, No. 5. pp. 357-360.

Bibtex

@article{9ea3189f5cc2499ca79d14e30fa56e61,
title = "Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology",
abstract = "Rivers are an important global sink for excess bioavailable nitrogen: they convert approximately 40% of terrestrial N-runoff per year (~47 Tg) to biologically unavailable N2 gas and return it to the atmosphere.1 Currently, riverine N2 production is conceptualised and modelled as denitrification.2-4 The contribution of anaerobic ammonium oxidation (or anammox), an alternate pathway of N2 production important in marine environments, is not well understood.5,6 Here we use in situ and laboratory measurements of anammox activity using 15N tracers and molecular analyses of microbial communities to evaluate anammox in clay, sand, and chalk-dominated river beds in the Hampshire Avon catchment, UK during summer, 2013. Anammox hzo gene abundance varied across the contrasting geologies. Anammox rates were similar across geologies but contributed different proportions of N2 production because of variation in denitrification rates. In spite of requiring anoxic conditions, anammox, most likely coupled to partial nitrification, contributed up to 58% of in situ N2 production in oxic, permeable riverbeds. In contrast, denitrification dominated in low permeability clay-bed rivers, where anammox contributes roughly 7% to the production of N2 gas. We conclude that anammox can represent an important nitrogen loss pathway in permeable river sediments.",
author = "K. Lansdown and McKew, {B. A.} and C. Whitby and Heppell, {C. M.} and Dumbrell, {A. J.} and Binley, {Andrew Mark} and L. Olde and Mark Trimmer",
year = "2016",
month = may,
doi = "10.1038/NGEO2684",
language = "English",
volume = "9",
pages = "357--360",
journal = "Nature Geoscience",
issn = "1752-0894",
publisher = "Nature Publishing Group",
number = "5",

}

RIS

TY - JOUR

T1 - Importance and controls of anaerobic ammonium oxidation influenced by riverbed geology

AU - Lansdown, K.

AU - McKew, B. A.

AU - Whitby, C.

AU - Heppell, C. M.

AU - Dumbrell, A. J.

AU - Binley, Andrew Mark

AU - Olde, L.

AU - Trimmer, Mark

PY - 2016/5

Y1 - 2016/5

N2 - Rivers are an important global sink for excess bioavailable nitrogen: they convert approximately 40% of terrestrial N-runoff per year (~47 Tg) to biologically unavailable N2 gas and return it to the atmosphere.1 Currently, riverine N2 production is conceptualised and modelled as denitrification.2-4 The contribution of anaerobic ammonium oxidation (or anammox), an alternate pathway of N2 production important in marine environments, is not well understood.5,6 Here we use in situ and laboratory measurements of anammox activity using 15N tracers and molecular analyses of microbial communities to evaluate anammox in clay, sand, and chalk-dominated river beds in the Hampshire Avon catchment, UK during summer, 2013. Anammox hzo gene abundance varied across the contrasting geologies. Anammox rates were similar across geologies but contributed different proportions of N2 production because of variation in denitrification rates. In spite of requiring anoxic conditions, anammox, most likely coupled to partial nitrification, contributed up to 58% of in situ N2 production in oxic, permeable riverbeds. In contrast, denitrification dominated in low permeability clay-bed rivers, where anammox contributes roughly 7% to the production of N2 gas. We conclude that anammox can represent an important nitrogen loss pathway in permeable river sediments.

AB - Rivers are an important global sink for excess bioavailable nitrogen: they convert approximately 40% of terrestrial N-runoff per year (~47 Tg) to biologically unavailable N2 gas and return it to the atmosphere.1 Currently, riverine N2 production is conceptualised and modelled as denitrification.2-4 The contribution of anaerobic ammonium oxidation (or anammox), an alternate pathway of N2 production important in marine environments, is not well understood.5,6 Here we use in situ and laboratory measurements of anammox activity using 15N tracers and molecular analyses of microbial communities to evaluate anammox in clay, sand, and chalk-dominated river beds in the Hampshire Avon catchment, UK during summer, 2013. Anammox hzo gene abundance varied across the contrasting geologies. Anammox rates were similar across geologies but contributed different proportions of N2 production because of variation in denitrification rates. In spite of requiring anoxic conditions, anammox, most likely coupled to partial nitrification, contributed up to 58% of in situ N2 production in oxic, permeable riverbeds. In contrast, denitrification dominated in low permeability clay-bed rivers, where anammox contributes roughly 7% to the production of N2 gas. We conclude that anammox can represent an important nitrogen loss pathway in permeable river sediments.

U2 - 10.1038/NGEO2684

DO - 10.1038/NGEO2684

M3 - Letter

VL - 9

SP - 357

EP - 360

JO - Nature Geoscience

JF - Nature Geoscience

SN - 1752-0894

IS - 5

ER -