Characteristics of phosphorus speciation and distribution in suspended particulate matter in the Zhejiang coastal area

Hu Xupeng; Li Xinxin; Xu Chengda; Tang Jingliang; Shao Junbo; Shi Xiaoyong

doi:10.12284/hyxb2021046

Volume 43 Issue 4

Apr. 2021

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Hu Xupeng，Li Xinxin，Xu Chengda, et al. Characteristics of phosphorus speciation and distribution in suspended particulate matter in the Zhejiang coastal area[J]. Haiyang Xuebao，2021, 43(4)：106–121 doi: 10.12284/hyxb2021046

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Characteristics of phosphorus speciation and distribution in suspended particulate matter in the Zhejiang coastal area

doi: 10.12284/hyxb2021046

Hu Xupeng^{1, 2
,},
Li Xinxin^{3, 4},
Xu Chengda²,
Tang Jingliang²,
Shao Junbo²,
Shi Xiaoyong^{1, 5
,
,}

1.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
2.
Zhejiang Marine Ecological and Environmental Monitoring Center, Zhoushan 316021, China
3.
Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
4.
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
5.
National Marine Hazard Mitigation Service, Ministry of Natural Resources, Beijing 100194, China

Received Date: 2020-06-05
Rev Recd Date: 2020-11-30

Available Online: 2021-06-18

Publish Date: 2021-04-01

Abstract

Abstract

Speciation and distribution of phosphorus have a direct effect on the primary production and marine biogeochemistry. However, the complex current dynamics in aquatic critical zones such as large river delta and coastal area result in variable characteristics of the phosphorus speciation and distribution that need in depth study. The content, distribution and influence factors of total particulate phosphorus (TPP), particulate inorganic phosphorus (PIP) and particulate organic phosphorus (POP) in the suspended particulate matter (SPM) in the Zhejiang coastal area off Changjiang Estuary were discussed based on the investigation from April to May (spring), July (summer) and September to October (autumn) in 2016. The results showed that the content ranged from 0.13 μmol/L to 66.13 μmol/L, with an average of 3.35 μmol/L for TPP, from 0.03 μmol/L to 34.19 μmol/L with an average of 1.97 μmol/L for PIP, and ranged from 0.06 μmol/L to 31.94 μmol/L with an average of 1.39 μmol/L for POP. PIP was the dominant (52.3%) form of particulate phosphorus in the Zhejiang coastal areas. The percentage of TPP in total phosphorus ranged from 19.3% to 97.7% in spring for surface samples. The spatial distribution patterns of TPP, PIP and POP contents were similar in spring and autumn, decreasing from the inner bay to offshore areas. The content of TPP was higher in areas where the SPM was higher while PIP and POP showed a positive correlation with SPM, indicating an influence from terrestrial input. The regression coefficient and slope between POP and chlorophyll a were significantly higher than that of PIP in the area with salinity above 28 and SPM below 20 mg/L in spring, indicating contributions from phytoplankton to POP accumulation.
- suspended particulate matter,
- total particulate phosphorus,
- particulate inorganic phosphorus,
- particulate organic phosphorus,
- Zhejiang coastal area

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References

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