夏季长江口缺氧区、低氧区和正常溶解氧海区浮游动物群落特征比较研究  

Comparative study on zooplankton community characteristics among hypoxic area,low dissolved oxygen area and normal area in the Changjiang(Yangtze River)Estuary in summer

作　　者：叶文建 杜萍 寿鹿 YE Wenjian;DU Ping;SHOU Lu(Key Laboratory of Marine Ecosystem Dynamics,Ministry of Natural Resources,Hangzhou 310012,China;Marine Academy of Zhejiang Province,Hangzhou 310012,China;Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Marine Space Resources ManagementTechnology Key Laboratory of Ministry of Natural Resources,Hangzhou 310012,China)

机构地区：[1]自然资源部第二海洋研究所,浙江杭州310012 [2]浙江省海洋科学院,浙江杭州310012 [3]自然资源部海洋生态系统动力学重点实验室,浙江杭州310012 [4]自然资源部海洋空间资源管理技术重点实验室,浙江杭州310012

出　　处：《海洋学研究》2021年第4期91-100,共10页Journal of Marine Sciences

基　　金：国家重点研发计划(2018YFD0900905);“全球变化与海气相互作用”专项二期任务(长江口缺氧酸化预警监测);中央级公益性科研院所基本科研业务费专项资金资助项目(SZ2001);2020年浙江省海洋空间要素保护与利用保障基本数据整理和更新调查项目;国家自然科学青年基金(41806181)。

摘　　要：夏季,长江口底层极易发生大面积低氧甚至缺氧。比较2016和2017年夏季长江口缺氧区(DO<2 mg/L)、低氧区(2 mg/L<DO<3 mg/L)和正常海区(DO>3 mg/L)浮游动物群落(>160μm)特征发现:2016年群落丰度和生物量均表现为缺氧区明显高于低氧区和正常海区;中小型桡足类、胶质浮游动物丰度表现为缺氧区和低氧区均高于正常海区;胶质浮游动物的组成,在低氧程度较严重的2016年夏季,以滤食性的海樽纲和有尾纲为主,在2017年夏季,以肉食性毛颚动物为主。In summer,large areas of low dissolved oxygen or hypoxia are prone to occur in the bottom waters of Changjiang(Yangtze River)Estuary.The zooplankton community(>160μm)in hypoxic area(DO<2 mg/L),low dissolved oxygen area(2 mg/L<DO<3 mg/L)and normal area(DO>3 mg/L)of the Changjiang Estuary in summer of 2016 and 2017 were compared.The results showed that the abundance and biomass of zooplankton in hypoxic area were significantly higher than those in the low dissolved oxygen area and normal area in 2016.The abundance of small medium-sized copepods and gelatinous zooplankton in hypoxic area and the low dissolved oxygen area were all higher than those in the normal area.It was dominated by filter-feeding of the class Thaliacea and Appendiculata in the summer of 2016 when the degree of hypxia was more serious,but in the summer of 2017,it was dominated by carnivorous Chaetognaths of the class Sagitta.

关 键 词：长江口 低氧 缺氧 浮游动物 

分 类 号：Q958.8[生物学—动物学]