A critical review of the 15N2 tracer method to measure diazotrophic production in pelagic ecosystems.
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Date
2020Author
White, Angelicque E.
Granger, Julie
Selden, Corday
Gradoville, Mary R.
Potts, Lindsey
Bourbonnais, Annie
Fulweiler, Robinson W.
Knapp, Angela N.
Mohr, Wiebke
Moisander, Pia H.
Tobias, Craig R.
Caffin, Mathieu
Wilson, Samuel T.
Benavides, Mar
Bonnet, Sophie
Mulholland, Margaret R.
Chang, Bonnie X.
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Show full item recordAbstract
Dinitrogen (N2) fixation is an important source of biologically reactive nitrogen (N) to the global ocean. The
magnitude of this flux, however, remains uncertain, in part because N2 fixation rates have been estimated following
divergent protocols and because associated levels of uncertainty are seldom reported—confounding comparison
and extrapolation of rate measurements. A growing number of reports of relatively low but potentially
significant rates of N2 fixation in regions such as oxygen minimum zones, the mesopelagic water column of the
tropical and subtropical oceans, and polar waters further highlights the need for standardized methodological
protocols for measurements of N2 fixation rates and for calculations of detection limits and propagated error
terms. To this end, we examine current protocols of the 15N2 tracer method used for estimating diazotrophic
rates, present results of experiments testing the validity of specific practices, and describe established metrics fo.....
Journal
Limnology and Oceanography: MethodsVolume
18Page Range
pp.129-147Document Language
enSustainable Development Goals (SDG)
14.aEssential Ocean Variables (EOV)
N/ADOI Original
10.1002/lom3.10353Citation
White, A.E., Granger, J., Selden, C., Gradoville, M.R., Potts, L., Bourbonnais, A., Fulweiler, R.W., Knapp, A.N., Mohr, W., Moisander, P.H., Tobias, C.R., Caffin, M., Wilson, S.T., Benavides, M., Bonnet, S., Mulholland, M.R. and Chang, B.X. (2020) A critical review of the 15N2 tracer method to measure diazotrophic production in pelagic ecosystems. Limnology and Oceanography: Methods, 18, pp.129-147. DOI: https://doi.org/10.1002/lom3.10353Collections
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