Oxygen production and carbon fixation in oligotrophic coastal bays and the relationship with gross and net primary production

Aquatic Microbial Ecology

Natalia González¹  Jean-Pierre Gattuso¹  Jack J. Middelburg¹ 

关键词: Primary production;    Oligotrophic coastal bays;    Light-dark O2 changes;    18O-labeling;    14C uptake;    Respiration in the light;   

DOI  :  10.3354/ame01208

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Planktonic primary production and respiration in 2 coastal oligotrophic sites of the Northwest Mediterranean Sea were examined. Primary production was quantified using 3 methods (light and dark changes in dissolved O₂, ¹⁸O-labeling and ¹⁴C uptake technique) using in situ bottle incubations. Gross primary production (GPP) based on the O₂ light-dark technique was not significantly different from that using the ¹⁸O-labeling technique, indicating that the former technique provides accurate estimates of GPP in these environments. Respiration in the dark was not significantly different from respiration in the light. Total ¹⁴C uptake (including the dissolved and particulate organic carbon fractions) during the whole duration of the light period approached GPP and consequently overestimated net primary production.

【 授权许可】

Unknown