广东沿海红树林区水质变化特征与富营养状态评估  

Characteristics of water quality and their eutrophication assessment on the mangrove ecosystems along the Guangdong coast

作　　者：INYANG Aniefiok Ini 周月月 王友绍[1,2,3,5] INYANG Aniefiok Ini;ZHOU Yueyue;WANG Youshao(State Key Laboratory of Tropical Oceanography(South China Sea Institute of Oceanology,Chinese Academy of Sciences),Guangzhou 510301,China;Daya Bay Marine Biology Research Station,Chinese Academy of Sciences,Shenzhen 518121,China;Innovation Academy of South China Sea Ecology and Environmental Engineering,Chinese Academy of Sciences,Guangzhou 510301,China;University of Chinese Academy of Sciences,Beijing 100049,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China)

机构地区：[1]热带海洋环境国家重点实验室(中国科学院南海海洋研究所),广东广州510301 [2]中国科学院大亚湾海洋生物综合试验站,广东深圳518121 [3]中国科学院南海生态环境工程创新研究院,广东广州510301 [4]中国科学院大学,北京100049 [5]南方海洋科学与工程广东省实验室(广州),广东广州511458

出　　处：《热带海洋学报》2022年第6期1-11,共11页Journal of Tropical Oceanography

基　　金：国家重点研发计划项目(国家科技基础资源调查专项)(2017FY100700);国家自然科学基金重点项目(U1901211、41876126);国际伙伴计划(133244KYSB20180012);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0305);中国科学院A类战略性先导科技专项(XDA23050200)。

摘　　要：调查了广东红树林区水质的时空变化,分别采集了红树林区表层水体水样旱季30个样点(2017年10月至2018年1月)和湿季20个样点(2018年7月至8月)进行分析。利用单一营养状态指数(TSI Chl a)评价红树林水质特征和营养状态,评价标准:0<TSI≤30为贫营养,30<TSI≤50为中营养,TSI>050为富营养,>70为高营养。红树林区环境参数的时空变化为:盐度(2.15‰~27.14‰)、p H(6.18~8.65)、电导率(10.87~90.52μs·cm)、浊度(0.0975~21.61FTU)、硝酸盐(0~127.2mg·L^(-1))、亚硝酸盐(0~12.0mg·L^(-1))、磷酸盐(0~34.5mg·L^(-1))、硅酸盐(1.22~2.88mg·L^(-1))和叶绿素a(0.19~38.08mg·m)。聚类分析表明,丰水期横跨雷州半岛右侧至广东沿海东部的水质相对较好,而左侧则处于中营养化状态。同时,在枯水期,红树林区水质较差,从雷州半岛周围的高中营养化状态,到广东沿海东部的富营养化状态。主成分分析表明,营养盐、盐度、p H、电导率(electrical conductivity,EC)和浊度对红树林区水质状况贡献显著,进而影响红树林生态系统中藻类群落的变化。It was investigated for the spatio-temporal variation of the water quality in the mangroves in Guangdong Province.Surface water samples were collected inside the mangroves from 30 sites during the dry season(Oct.,2017 to Jan.,2018)and 20 sites during the wet season(July to Aug.,2018).Water quality and trophic conditions were highlighted by the single trophic state index(TSI Chl a),and the evaluation standard was:0<TSI≤30 oligotrophic,30<TSI≤50 mesotrophic,TSI>50 eutrophic,and>70 high eutrophic.The spatio-temporal variations of the environmental variables were as follows:salinity(2.15‰~27.14‰),pH(6.18~8.65),electrical conductivity(10.87~90.52μs·cm–1),turbidity(5.6~272 FTU),nitrate(0~127.2 mg·L^(–1)),nitrite(0~12.0 mg·L^(–1)),phosphate(0~34.5 mg·L^(–1)),silicate(1.22~2.88 mg·L^(–1))and Chlorophyll a(0.19~38.08 mg·m–3).Cluster analysis deduced that the water quality across the right side of the Leizhou Peninsula to the east Guangdong coast during the wet season was relatively better,while the left side experienced mesotrophic conditions.Meanwhile the water quality decreased in the dry season,ranging from high mesotrophic conditions around the Leizhou Peninsula to eutrophic conditions across the east coast.The PCA revealed that nutrient salts,salinity,pH,EC and turbidity contributed significantly to the water quality status in the mangrove ecosystems,which in turn affects the algal communities in the ecosystem.

关 键 词：藻类丰度 营养盐 红树林 营养状态 广东沿海 

分 类 号：X52[环境科学与工程—环境工程] X824