Phosphorus chemical speciation and seasonal variations in surface sediments of the Maowei Sea, northern Beibu Gulf

Bin Yang; Jia-Bin Zhou; Dong-Liang Lu; Solomon Felix Dan; Dong Zhang; Wen-Lu Lan; Zhen-Jun Kang; Zhi-Ming Ning; Dong-Yang Cui

doi:10.1016/j.marpolbul.2019.02.023

Phosphorus chemical speciation and seasonal variations in surface sediments of the Maowei Sea, northern Beibu Gulf

Mar Pollut Bull. 2019 Apr:141:61-69. doi: 10.1016/j.marpolbul.2019.02.023. Epub 2019 Feb 18.

Authors

Bin Yang¹, Jia-Bin Zhou², Dong-Liang Lu³, Solomon Felix Dan⁴, Dong Zhang⁵, Wen-Lu Lan⁶, Zhen-Jun Kang¹, Zhi-Ming Ning⁵, Dong-Yang Cui⁷

Affiliations

¹ Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China; Key Laboratory of Coastal Science and Engineering, Beibu Gulf, Guangxi, Beibu Gulf University, Qinzhou 535011, China.
² Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China.
³ Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China. Electronic address: ldl@qzhu.edu.cn.
⁴ Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
⁵ Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning 530004, China.
⁶ Marine Environmental Monitoring Center of Guangxi, Beihai 536000, China.
⁷ Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.

PMID: 30955774
DOI: 10.1016/j.marpolbul.2019.02.023

Abstract

This study presents the distribution, seasonal variations and factors influencing phosphorus (P) forms in surface sediments from the Maowei Sea. P forms were measured using the sequential extraction (SEDEX) procedures. Inorganic P (IP) was the predominant chemical form of total P (TP). Fe-bound P (FeP) was the main IP form. Sediment particle sizes, organic matter distribution, terrestrial input and aquaculture activity were responsible for the seasonal variations of different forms of P in sediment. In summer, the average proportions of P fractions in TP followed the order of organic P (OP) > Fe-P > authigenic P (CaP) > detrital P (De-P) > exchangeable P (Ex-P); in winter, the corresponding order was OP > Fe-P > De-P > Ca-P > Ex-P. The potential bio-available P accounted for 71.1 ± 4.9% and 70.6 ± 6.3% of TP in summer and winter, respectively. Sedimentary organic matter mainly came from land-based sources in winter.

Keywords: Bioavailability; Maowei Sea; Phosphorus; Seasonal variation; Surface sediments.

MeSH terms

Aquaculture
Biological Availability
China
Environmental Monitoring
Geologic Sediments / analysis*
Geologic Sediments / chemistry
Iron / analysis
Iron / chemistry
Particle Size
Phosphorus / analysis*
Phosphorus / chemistry
Phosphorus / pharmacokinetics
Seasons

Substances

Phosphorus
Iron