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Phosphorus speciation and its bioavailability in sediments of the Jiaozhou Bay
Kang, Xuming1,2; Song, Jinming1,2; Yuan, Huamao1,2; Shi, Xin1,3; Yang, Weifeng4,5; Li, Xuegang1,2; Li, Ning1,2; Duan, Liqin1,2
2017-03-15
发表期刊ESTUARINE COASTAL AND SHELF SCIENCE
卷号188页码:127-136
文章类型Article
摘要Phosphorus (P) is an important macronutrient that can limit primary productivity in coastal marine ecosystems. In this study, four sediment cores were collected in the Jiaozhou Bay to study the phosphorus forms and their bioavailability, including exchangeable or loosely sorbed P (Ex-P), iron-bound P (Fe-P), authigenic P (Ca-P), detrital P (De-P) and organic P (OP), which were separated and quantified using a sequential extraction method (SEDEX). The results showed that the concentration of total P (TP) in core sediments ranged from 6.23 to 10.46 mu mol/g, and inorganic P (IP) was the dominated P form. Fe-P and De-P were the main chemical forms of IP in core sediments. The profile variation of OP presented the most significant among the phosphorus forms. Whereas the concentrations of Ex-P, Fe-P, and Ca-P varied slightly with depth, indicating that the transformation of Ex-P, Fe-P, Ca-P, and OP could occur during sedimentary P burial. Moreover, the distribution of P species was influenced by many factors, including terrigenous input, biological processes, organic matter degradation and increasing human activities. High total organic carbon (TOC)/OP ratio occurred in the Jiaozhou Bay, ranging from 73 to 472 (average, 180 81) in core sediments, which was caused by the increasing terrestrial organic matter. The ratio of TOC/P-reactive ranged from 24 to 101 (average 46 15) in core sediments (lower than the Redfield ratio), implying a surplus of sedimentary reactive P compared with TOC. Potential bioavailable P (BAP) accounted for about 28.2-60.8% (average, 47.1 +/- 7.4%) of TP in core sediments, and presented an increasing trend since 1980s, which might be responsible for the shift of phytoplankton community composition during these decades. (C) 2017 Elsevier Ltd. All rights reserved.
关键词Phosphorus Chemical Speciation Bioavailability Environmental Impact Sediments Jiaozhou Bay
DOI10.1016/j.ecss.2017.02.029
收录类别SCI
语种英语
WOS记录号WOS:000400530500013
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/137061
专题海洋生态与环境科学重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
5.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361005, Peoples R China
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Kang, Xuming,Song, Jinming,Yuan, Huamao,et al. Phosphorus speciation and its bioavailability in sediments of the Jiaozhou Bay[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2017,188:127-136.
APA Kang, Xuming.,Song, Jinming.,Yuan, Huamao.,Shi, Xin.,Yang, Weifeng.,...&Duan, Liqin.(2017).Phosphorus speciation and its bioavailability in sediments of the Jiaozhou Bay.ESTUARINE COASTAL AND SHELF SCIENCE,188,127-136.
MLA Kang, Xuming,et al."Phosphorus speciation and its bioavailability in sediments of the Jiaozhou Bay".ESTUARINE COASTAL AND SHELF SCIENCE 188(2017):127-136.
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