期刊
MARINE POLLUTION BULLETIN
卷 62, 期 6, 页码 1276-1287出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.03.009
关键词
Ruditapes philippinarum; Mytilus galloprovincialis; Nitrogen; Phosphorous; Coastal lagoon; Eutrophication
资金
- Italian Ministry for University, Scientific and Technological Research [2008EZEFE4]
- Italian Ministry for Agriculture and Forestry [6C.76]
Effects of suspended mussel and infaunal clam cultivation on sediment characteristics, and benthic organic and inorganic nitrogen and phosphorus fluxes were compared in a shallow coastal lagoon. The two species had different impacts on sediment features, but both created hotspots of nutrient fluxes with annual N and P regeneration rates being 4.9 and 13.5 (mussel) and 4.5 and 14.9 (clams) fold greater than those of unfarmed control sediments. Mussel farming also caused considerable nutrient regeneration within the water column with the mussel ropes contributing similar to 25% of total inorganic N and P production and at times dominating the sediments (e.g. 95% of SRP production in summer and 45% of DIN production in winter). Such nutrient regeneration rates seriously question the proposal that suspension-feeding bivalves act as a eutrophication buffer, especially during summer when nutrient regeneration rates are maximal, but other nutrient sources (freshwater run-off and unfarmed sediments) are at their lowest. (C) 2011 Elsevier Ltd. All rights reserved.
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