Oxygen demands of San Diego Trough sediments: an in situ study1
Open Access
- 1 November 1974
- journal article
- research article
- Published by Wiley in Limnology and Oceanography
- Vol. 19 (6) , 939-944
- https://doi.org/10.4319/lo.1974.19.6.0939
Abstract
In situ total oxygen demand of San Diego Trough sediments measured at a depth of 1,230 m was 2.40 ± 0.10 ml O2 m−2 hr−1. Community respiration and chemical demand were 1.31 and 1.09 ml O2 m−2 hr−1 and constituted 54.6 and 45.4% of the total demand. Compartmentalization of community respiration with antibiotic treatment yielded a “bacterial respiration” measurement of 0.21 ml O2 m−2 hr−1. Surface water enrichment due to seasonal upwelling over the San Diego Trough is manifested in the sediment carbon demands, which are significantly higher (3.5% of the estimated annual primary production) than demands at comparable depths in more oligotrophic areas.Keywords
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