期刊
MARINE POLLUTION BULLETIN
卷 65, 期 10-12, 页码 500-505出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.02.013
关键词
Benthic-pelagic coupling; Pearl oyster; Nutrient fluxes; Sediment interface
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
This study quantifies benthic nutrient fluxes and sedimentation rates in the Ahe Atoll lagoon (French Polynesia), in two stations located under pearl oyster frames, and two control stations away from the pearl culture facility. Dissolved inorganic nitrogen fluxes ranged between 2 and 35 mu mol N m(-2) h(-1) and Soluble Reactive Phosphorus varied between -3 and 8.2 mu mol P m(-2) h(-1). Particulate sedimentation rates beneath the oysters were approximately five times higher than in the control zone and the percentage of small particles (<= 63 mu m) were about the twice. In contrast, sediment composition was similar under and outside the direct influence of oyster frames. In this ecosystem, where primary production is dependent on the available nitrogen, our study revealed that, while highly variable, benthic fluxes could sometimes contribute up to 28% of the nitrogen demand for primary production. (C) 2012 Elsevier Ltd. All rights reserved.
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