P-Limitation of Respiration in the Sargasso Sea and Uncoupling of Bacteria from P-Regeneration in Size-Fractionation Experiments

Author(s)

Ingrid Obernosterer, Observatoire Océanologique, Banyuls sur Mer, France
Nobu Kawasaki, University of South Carolina - Columbia
Ronald Benner, University of South Carolina - ColumbiaFollow

ORCID iD

Ronald Benner: https://orcid.org/0000-0002-1238-2777

Document Type

Article

Subject Area(s)

Biology

Abstract

Community respiration rates were measured in unfiltered seawater collected in the upper 75 m of the water column along a transect in the Sargasso Sea and at the Bermuda Atlantic Time-series Study (BATS) station (31° 50’ 00 N; 64° 10’ 00 W) during a cruise in June and July 2001. Community respiration rates in the upper 75 m of the water column averaged 1.1 ± 0.4 μM O₂ d^-1 and exhibited significant spatial and temporal variability. Concurrent determination of the heterotrophic and autotrophic community revealed no relationship between community respiration and the abundance of any of the major metabolic groups. Addition of inorganic nutrients (NO₃ and PO₄) and organic carbon (glucose) indicated that community respiration was P-limited in the surface mixed layer. Size-fractionation experiments indicated that the abundance of heterotrophic bacteria in the

Digital Object Identifier (DOI)

https://doi.org/10.3354/ame032229

Publication Info

Aquatic Microbial Ecology, ed. Frede Thingstad, Volume 32, Issue 3, 2003, pages 229-237.

Rights

© Aquatic Microbial Ecology 2003, Inter-Research.

APA Citation

Obernosterer, I., Kawasaki, N., & Benner, R. (2003). P-Limitation of Respiration in the Sargasso Sea and Uncoupling of Bacteria from P-Regeneration in Size-Fractionation Experiments. Aquatic Microbial Ecology, 32(3), 229–237. https://doi.org/10.3354/ame032229