| 浙江近岸海域悬浮颗粒物中磷的赋存形态及分布特征研究 |
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| 引用本文： | 胡序朋,李芯芯,徐成达,唐静亮,邵君波,石晓勇.浙江近岸海域悬浮颗粒物中磷的赋存形态及分布特征研究[J].海洋学报,2021,43(4):106-121. |
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| 作者姓名： | 胡序朋 李芯芯 徐成达 唐静亮 邵君波 石晓勇 |
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| 作者单位： | 1.中国海洋大学 化学化工学院，山东 青岛 266100 |
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| 基金项目： | 浙江省环保科研计划项目（2015A016）；国家自然科学基金（91851210）；浙江省生态环境厅科研项目（2019A001）；广西北部湾海洋灾害研究重点实验室（北部湾大学）开放课题（2020KF01）。 |
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| 摘 要： | 磷元素是海洋基础营养盐之一，其赋存形态及分布直接影响海区的初级生产力，是海洋生物地球化学循环的重要驱动力。但大河河口与近海等重要的水生关键带水动力循环过程复杂，导致悬浮颗粒物(SPM )中磷元素的赋存形态和分布特征变化多端，亟须深入研究。根据2016年春季(4?5月)、夏季(7月)和秋季(9?10月)对浙江近岸海域的调查结果，本研究分析了浙江近岸海域SPM中总磷(TPP)、无机磷(PIP)和有机磷(POP)的含量水平、空间分布特征和影响因素。结果表明，浙江近岸海域SPM中TPP含量范围为0.13～66.13 μmol/L，均值为3.35 μmol/L；PIP含量范围为0.03～34.19 μmol/L，均值为1.97 μmol/L；POP含量范围为0.06～31.94 μmol/L，均值为1.39 μmol/L。PIP是浙江近岸海域水体中TPP的主要存在形式，占52.3%。春季浙江近岸海域表层TPP含量占总磷(TP)含量的19.3%～97.7%。春、秋季的SPM中，TPP、PIP和POP含量空间分布相似，均呈现由内湾向外海逐渐降低的变化趋势。PIP、POP与SPM呈显著的正相关性，表现出高SPM含量的海区有着较高的颗粒态磷含量，说明其受陆源输入的影响。春季盐度大于28且SPM含量小于20 mg/L的外侧远海海域，POP与Chl a的相关系数和斜率均明显高于PIP与Chl a的相关系数和斜率，说明该区域浮游植物是POP的主要贡献来源。
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| 关 键 词： | 悬浮颗粒物 颗粒总磷 颗粒无机磷 颗粒有机磷 浙江近岸海域 |
| 收稿时间： | 2020-06-05 |
Characteristics of phosphorus speciation and distribution in suspended particulate matter in the Zhejiang coastal area |
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| Affiliation: | 1.College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China2.Zhejiang Marine Ecological and Environmental Monitoring Center, Zhoushan 316021, China3.Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China4.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China5.National Marine Hazard Mitigation Service, Ministry of Natural Resources, Beijing 100194, China |
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| 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. |
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