TY - JOUR
T1 - Nitrogen uptake, dissolved organic nitrogen release, and new production
AU - Bronk, Deborah A.
AU - Gilbert, Patricia M.
AU - Ward, Bess B.
PY - 1994/9/23
Y1 - 1994/9/23
N2 - In oceanic, coastal, and estuarine environments, an average of 25 to 41 percent of the dissolved inorganic nitrogen (NH4+ and NO3-) taken up by phytoplankton is released as dissolved organic nitrogen (DON). Release rates for DON in oceanic systems range from 4 to 26 nanogram-atoms of nitrogen per liter per hour. Failure to account for the production of DON during nitrogen-15 uptake experiments results in an underestimate of gross nitrogen uptake rates and thus an underestimate of new and regenerated production. In these studies, traditional nitrogen-15 techniques were found to underestimate new and regenerated production by up to 74 and 50 percent, respectively. Total DON turnover times, estimated from DON release resulting trom both NH4+ and NO3- uptake, were 10 ± 1, 18 ± 14, and 4 days for oceanic, coastal, and estuarine sites, respectively.
AB - In oceanic, coastal, and estuarine environments, an average of 25 to 41 percent of the dissolved inorganic nitrogen (NH4+ and NO3-) taken up by phytoplankton is released as dissolved organic nitrogen (DON). Release rates for DON in oceanic systems range from 4 to 26 nanogram-atoms of nitrogen per liter per hour. Failure to account for the production of DON during nitrogen-15 uptake experiments results in an underestimate of gross nitrogen uptake rates and thus an underestimate of new and regenerated production. In these studies, traditional nitrogen-15 techniques were found to underestimate new and regenerated production by up to 74 and 50 percent, respectively. Total DON turnover times, estimated from DON release resulting trom both NH4+ and NO3- uptake, were 10 ± 1, 18 ± 14, and 4 days for oceanic, coastal, and estuarine sites, respectively.
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U2 - 10.1126/science.265.5180.1843
DO - 10.1126/science.265.5180.1843
M3 - Article
C2 - 17797223
AN - SCOPUS:0028161221
SN - 0036-8075
VL - 265
SP - 1843
EP - 1846
JO - Science
JF - Science
IS - 5180
ER -