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| 基于PSR模型的珠江口海域富营养化特征与评价 |
| 龙苒,陈海刚,田斐,王学锋,张林宝,张喆,唐振朝,叶国玲,陈建华 |
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| (江苏海洋大学海洋科学与水产学院，江苏省海洋生物技术重点实验室，江苏 连云港 222005;中国水产科学研究院南海水产研究所,广东省渔业生态环境重点实验室, 农业农村部南海渔业资源环境科学观测实验站,广东珠江口生态系统野外科学观测研究站, 广东 广州 510300;南方海洋科学与工程广东省实验室（湛江），广东 湛江 524025) |
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| 摘要: |
| 本研究依据2020年4月（春季）和2020年10月（秋季）珠江口海域的调查数据，根据“压力-状态-响应”（PSR）模型对珠江口海域进行富营养化状况评价，并通过主成分分析以及相关性分析来说明各环境因子对珠江口富营养化的影响。结果表明：在“优、良、中、差、劣”5个富营养化等级中，珠江口PSR综合评价等级为“差”等级，近几年内变化趋于稳定。有机污染物与营养盐对珠江口富营养化的影响较大，其次为叶绿素a和溶解氧。珠江口营养盐与盐度呈显著负相关，与叶绿素a呈显著正相关。周边城市的陆源排放输入是导致珠江口富营养化的主要因素，河口稀释混合作用以及浮游植物对珠江口的富营养化程度有影响。 |
| 关键词: 海洋化学 压力-状态-响应 富营养化 营养盐 珠江口 |
| DOI：10.3969/J.ISSN.2095-4972.2023.02.014 |
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| 基金项目:中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项(2021SD17)；南方海洋科学与工程广东省实验室(湛江)资助项目( ZJW-2019-06)；广东省科技计划(2019B121201001);江苏省海洋生物技术重点实验研究项目(HS2022002) |
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| Evaluation and characteristics of water eutrophication in the Pearl River Estuary based on PSR model |
| LONG Ran,CHEN Hangang,TIAN Fei,WANG Xuefeng,ZHANG Linbao,ZHANG Zhe,TANG Zhenchao,YE Guoling,CHEN Jianhua |
| (Jiangsu Key Laboratory of Marine Biotechnology/College of Marine Science and Fisheries,Jiangsu Ocean University, Lianyungang 222005, China;Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Scientific Observing and Experimental Station of South China Sea Fishery Resource and Environment,Ministry of Agriculture and Rural Affairs, Scientific Observation and Research Field Station of Pearl River Estuary Ecosystem，Guangdong Province，South China Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510300，China;Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang), Zhanjiang 524025, China) |
| Abstract: |
| Based on the environmental survey data from the Pearl River Estuary (PRE) in April (spring) and October (autumn) 2020, the pressure-state-response (PSR) model evaluation, the principal component analysis and the correlation analysis were used to evaluate eutrophication status and the environmental factors in the PRE. Results showed that the PSR comprehensive evaluation for the PRE grade was Moderate-Poor, among the five, “Superior, Superior-Moderate, Moderate, Moderate-Poor and Poor”, and it fluctuated insignificantly in recent years. The primary factors affecting the PRE eutrophication were organic pollutants and nutrients and the secondary factors are chlorophyll and dissolved oxygen. The nutrients were negatively correlated with salinity and positively correlated with chlorophyll in water. Eutrophication in the PRE was mainly caused by terrestrial discharges from the city surrounding areas and the water mixed nutrients and phytoplankton activities had affected the eutrophication status of the PRE. |
| Key words: marine chemistry pressure-state-response eutrophication nutrient Pearl River Estuary |