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
作者： Gu, Yang-Guang 1 ; Wang, Yasu 1 ; Ouyang, Jun 4 ; Jordan, Richard W. 5 ; Jiang, Shijun 1 ;
作者机构： 1.Jinan Univ, Coll Life Sci & Technol, Key Lab Eutrophicat & Red Tide Prevent Guangdong, Guangzhou 510632, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China
4.Hainan Prov Ecol & Ecol & Environm Monitoring Ctr, Haikou 570000, Hainan, Peoples R China
5.Yamagata Univ, Fac Sci, Yamagata 9908560, Japan
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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