Nitrate and ammonium uptake in Antarctic waters1

Nitrate and ammonium uptake rates were measured by the 15 N tracer technique in Antarctic waters. The ratio urn:x-wiley:00243590:media:lno19802561064:lno19802561064-math-0001 averaged 0.54 in the Scotia Sea in early spring and 0.40 in the Ross Sea in summer, indicating that NO 3 − and NH 4 + contrib...

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Bibliographic Details
Published in:Limnology and Oceanography
Main Author: Olson, Robert J.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1980
Subjects:
Aquatic Science
Oceanography
Antarctic
Ross Sea
Scotia Sea
Antarc*
Online Access:http://dx.doi.org/10.4319/lo.1980.25.6.1064
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1980.25.6.1064
https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1980.25.6.1064
Description
Summary:Nitrate and ammonium uptake rates were measured by the 15 N tracer technique in Antarctic waters. The ratio urn:x-wiley:00243590:media:lno19802561064:lno19802561064-math-0001 averaged 0.54 in the Scotia Sea in early spring and 0.40 in the Ross Sea in summer, indicating that NO 3 − and NH 4 + contribute about equally to primary production in these regions and that a large proportion of the primary production is exported from the surface layers. Uptake rates in laboratory experiments increased with increasing temperature and the relative uptake of NH 4 + was positively correlated with increasing mean ambient NH 4 + concentration and depth in the water column.

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