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Mineralization of dissolved organic carbon in the Sargasso Sea

Mineralization of dissolved organic carbon in the Sargasso Sea
Mineralization of dissolved organic carbon in the Sargasso Sea
The lability of dissolved organic carbon was estimated in the Sargasso Sea. Rates of DOC mineralization were estimated by monitoring, with high precision, the accumulation of CO2 in dark incubation bottles after the removal of particles > 0.8 ?m in size. The minimum incubation time used in these experiments was 24 h. Rates from three 24 h incubations conducted on water from 20 m fell in the narrow range of 0.44–0.45 ?M C d?1. These rates ranged from approximate equivalence to more than 100% greater than the concurrent rates of primary productivity, suggesting in some cases that gross primary productivity was underestimated or that there existed labile DOC produced earlier in time, thus supporting periods of net heterotrophy in the Sargasso Sea.
0304-4203
201-212
Hansell, Dennis A.
d4f0a3af-ca20-4791-a794-e52cbd56d654
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Gundersen, Kjell
f7be2231-9a81-457b-bc07-745a1a278c50
Hansell, Dennis A.
d4f0a3af-ca20-4791-a794-e52cbd56d654
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Gundersen, Kjell
f7be2231-9a81-457b-bc07-745a1a278c50

Hansell, Dennis A., Bates, Nicholas R. and Gundersen, Kjell (1995) Mineralization of dissolved organic carbon in the Sargasso Sea. Marine Chemistry, 51 (3), 201-212. (doi:10.1016/0304-4203(95)00063-1).

Record type: Article

Abstract

The lability of dissolved organic carbon was estimated in the Sargasso Sea. Rates of DOC mineralization were estimated by monitoring, with high precision, the accumulation of CO2 in dark incubation bottles after the removal of particles > 0.8 ?m in size. The minimum incubation time used in these experiments was 24 h. Rates from three 24 h incubations conducted on water from 20 m fell in the narrow range of 0.44–0.45 ?M C d?1. These rates ranged from approximate equivalence to more than 100% greater than the concurrent rates of primary productivity, suggesting in some cases that gross primary productivity was underestimated or that there existed labile DOC produced earlier in time, thus supporting periods of net heterotrophy in the Sargasso Sea.

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Published date: December 1995
Organisations: Ocean Biochemistry & Ecosystems

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Local EPrints ID: 358401
URI: https://eprints.soton.ac.uk/id/eprint/358401
ISSN: 0304-4203
PURE UUID: 2c8f66c1-4a17-45e6-8a6e-eefc23074612

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Date deposited: 04 Oct 2013 12:28
Last modified: 18 Jul 2017 03:30

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