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Science 21 March 2008:
Vol. 319. no. 5870, p. 1616
DOI: 10.1126/science.1148589
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Technical Comments

Comment on "Physical Model for the Decay and Preservation of Marine Organic Carbon"

Bernard P. Boudreau,1* Carol Arnosti,2 Bo Barker Jørgensen,3 Donald E. Canfield4

Rothman and Forney (Reports, 1 June 2007, p. 1325) described a model for the decay of marine organic carbon. However, the enzyme deactivation rates required by their model are too fast compared with available data, and the model fails to explain the similarity in observed decay rate constants from different experiments. Alternative models provide equally good fit to the observed temporal trend in decay rate constants.

1 Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada.
2 Department of Marine Sciences, University of North Carolina, Chapel Hill, NC 27599–3300, USA.
3 Max Planck Institut für Marine Mikrobiologie, Celsiusstrasse 1, D-28359 Bremen, Germany.
4 Nordic Center for Earth Evolution and Institute of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.

* To whom correspondence should be addressed. E-mail: bernie.boudreau{at}dal.ca

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