Impacts of coastal aquaculture on sedimentary phosphorus speciation and fate: Evidence from a seaweed cultivation area off Nan'ao Island, South China

文献类型： 外文期刊

第一作者： Gu, Yang-Guang

作者： Gu, Yang-Guang;Wang, Yasu;Jiang, Shijun;Wang, Yasu;Jiang, Shijun;Gu, Yang-Guang;Ouyang, Jun;Jordan, Richard W.

作者机构：

关键词： Phosphorus; Speciation; Bioavailability; Sediments; Seaweed cultivation

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2021 年 171 卷

页码：

收录情况： SCI

摘要： How aquaculture impacts the coastal phosphorus (P) cycle remains poorly understood. Here we compared different P species from two sedimentary records off Nan'ao Island, South China, with core S1 collected in a large seaweed cultivation area and core S2 in a non-mariculture area. The results showed that the concentration of total P (TP) in sediment cores varied from 143.67 to 400.92 mu g/g, and organic P (OP) was the dominant P species. The TOC/OP ratios in the two sediment cores were higher than the Redfield ratio in 26 samples (52%) from core S1 and 39 samples (78%) from core S2, suggesting that terrestrial organic matter was an important carbon source to Shen'ao Bay. The lack of change in Ex-P (exchangeable or loosely sorbed P) and OP in the area around core S1 since the 2000s may be due to the large-scale seaweed cultivation.

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