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Longitudinal Variability Of Size-Fractionated N-2 Fixation And Don Release Rates Along 24.5 Degrees N In The Subtropical North Atlantic, Mar Benavides, Deborah A. Bronk, Nona S.R. Agawin, M. Dolores Perez-Hernandez, Alonso Hernandez-Guerra, Javier Aristegui
Longitudinal Variability Of Size-Fractionated N-2 Fixation And Don Release Rates Along 24.5 Degrees N In The Subtropical North Atlantic, Mar Benavides, Deborah A. Bronk, Nona S.R. Agawin, M. Dolores Perez-Hernandez, Alonso Hernandez-Guerra, Javier Aristegui
VIMS Articles
Dinitrogen (N-2) fixation and dissolved organic nitrogen (DON) release rates were measured on fractionated samples (>10 mu m and m) along 24.5 degrees N in the subtropical North Atlantic. Net N-2 fixation rates (N-2 assimilation into biomass) ranged from 0.01 to 0.4 nmol N L-1 h(-1), and DON release rates ranged from 0.001 to 0.09 nmol N L-1 h(-1). DON release represented approximate to 14% and approximate to 23% of >10 mu m and (assimilation into biomass plus DON release), respectively. This implies that by overlooking DON release, N-2 fixation rates are underestimated. Net N-2 fixation rates were higher …