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Spatial variations in time-integrated plankton metabolic rates in Sagami Bay using triple oxygen isotopes and O2:Ar ratios

DRS at CSIR-National Institute of Oceanography

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Title Spatial variations in time-integrated plankton metabolic rates in Sagami Bay using triple oxygen isotopes and O2:Ar ratios
 
Creator Sarma, V.V.S.S.
Abe, O.
Saino, T.
 
Subject plankton
oxygen isotopes
chlorophylls
primary production
 
Description Plankton metabolic rates, such as rates of gross, net community production and community respiration, were measured in the surface waters using triple oxygen isotopes and O2 : Ar ratios. The 17 delta anomaly showed clear coastal and offshore gradients that were consistent with the distribution of chlorophyll a and oxygen saturation. Gross primary production (GPP) rates in coastal regions were several times higher than offshore regions, and the net-to-gross production ratio (N : G) indicated that coastal regions were net autotrophic, whereas offshore regions were net heterotrophic. On a seasonal scale, about 73% of the phytoplankton-produced carbon was respired. Based on floating-sediment-trap data, export production to the aphotic zone was about 12-20% of the GPP; the rest accumulated as dissolved organic carbon (DOC) or was respired
 
Date 2008-11-21T06:10:14Z
2008-11-21T06:10:14Z
2008
 
Type Journal Article
 
Identifier Limnology and Oceanography, vol.53; 1776-1783p.
http://drs.nio.org/drs/handle/2264/1483
 
Language en
 
Rights Copyright [2008]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher American Society of Limnology and Oceanography