期刊
MARINE POLLUTION BULLETIN
卷 65, 期 10-12, 页码 471-477出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.12.026
关键词
Atoll; Nutrients; Phytoplankton; Aquaculture
资金
- European Development Fund
- French Agency of Development (AFD)
- National Institute of Water and Atmospheric Research (NIWA)
- Service de la Perliculture
- University of French Polynesia
The environmental characteristics of Ahe deep lagoon (Tuamotu Archipelago, French Polynesia) were studied over 3 years with the aim of explaining the spatial and temporal variability of the natural food available for pearl oysters with a special focus on phytoplankton biomass and global photosynthesis/respiration ratio of the lagoon. Chlorophyll averaged 0.34 +/- 0.01 mu g L-1 and our findings did not confirm increased phytoplankton biomass in deep lagoonal waters. Phytoplankton production appears to be limited firstly by nitrogen and respiratory processes overpass photosynthetic processes at least in the northeastern edge of the atoll. Grazing by pearl oysters in culture seems to decrease the POC concentration but not the phytoplankton biomass. Oysters graze mainly on non chlorophyllian particles. (C) 2011 Elsevier Ltd. All rights reserved.
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