摘要
根据2016—2017年南渡江鱼类资源调查数据,通过分析渔获生物量、相对重要性指数IRI、Pielou均匀性指数、Margalef丰富度指数和Shannon多样性指数评估了南渡江的鱼类生物多样性。基于鱼类生物完整性指数IBI构建了两套评价体系,分别评价了南渡江的局部健康状况及其与历史的差异。鱼类多样性研究结果表明:群落中存在尼罗罗非鱼(Oreochromis niloticu)、鳙(Aristichthys nobilis)、海南似鱎(Toxabramis houdemeri)、(Hemiculter leucisulus)等16种优势种;Margalef丰富度指数和Shannon多样性指数均显示,以南渡江源头及河口采样点的数值较高,中部采样点数值较低;Pielou均匀性指数则表现为南渡江中部采样点数值高,两端采样点的低。鱼类生物完整性评价结果表明:南渡江保存了历史的大部分鱼类,各项百分比指标与历史的变化幅度在0.2%~10.5%,而种类指标变化范围在0~4种;从南渡江局部江段来看,中游江段评价得分仅为19分,远低于其他江段的36~46分。研究表明:南渡江鱼类生物多样性和生物完整性保存完好,河流健康状况好;在河流内部,源头和河口生物多样性高且完整性好,而河流中游健康状况差。
Based on data collected from fish resource survey in 2016-2017,we assessed fish species diversity and the health status of Nandujiang River,Hainan Island,China. The relative importance index（ IRI）,Pielou uniformity index,Margalef richness index and Shannon diversity index were used to evaluate fish biodiversity. Two sets of evaluation system constructed by the fish-based biotic integrity index（ IBI） were used to assess the river health status. Results showed that there were 16 dominant fish species in Nandujiang River,including Oreochromis niloticu,Aristichthys nobilis,Toxabramis houdemeri,Hemiculter leucisulus and so on. The Margalef richness index showed the same temporal trend as the Shannon diversity index,being higher in the sampling points of the source and the estuary of Nandujiang River but lower in the middle section.In contrast,the Pielou uniformity index was higher in the sampling points of the middle section but lower in the source and the river estuary. The results of fish-based biotic integrity evaluation showed that most of the historical fish were preserved in the river. The percentage indicators changed from 0.2% to 10.5%,while the change of species number ranged from 0 to 4. Among all sections of Nandujiang River,the final score of middle section was only 19 points,which was much lower than that of other sections（ 36-46 points）. In conclusion,Nandujiang River was healthy with respect to higher fish biodiversity and biotic integrity. Among different sections of the river,the source and estuary had better biodiversity and biotic integrity than the middle section.
作者
余梵冬
顾党恩
佟延南
李芳远
申志新
朱海
潘贤辉
周康奇
马光明
王德强
胡隐昌
YU Fan-dong;GU Dang-en;TONG Yan-nan;LI Fang-yuan;SHEN Zhi-xin;ZHU Hai;PAN Xian-hui;ZHOU Kang-qi;MA Guang-ruing;WANG De-qiang;HU Yin-chang(pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Key Laboratory of Recreational Fisheries,Ministry of Agriculture and Rural Affairs,Guangdong Modern Leisure Fisheries Engineering Technology Center,Guangzhou 510380,China;College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China;Hainan Academy of Ocean and Fisheries Sciences,Haikou 570100,China;College of Animal Science,China Southwest University,Chongqing 400700,China;Zhaoqing Dahuanong Biology Medicine Co.,Ltd.,Zhaoqing 526238,Guangdong,China）.)
出处
《生态学杂志》
CAS
CSCD
北大核心
2018年第9期2717-2726,共10页
Chinese Journal of Ecology
基金
海南省科技计划<海南岛淡水鱼类资源调查>
国家自然科学基金项目(31500465)
中央级科研单位基本科研业务费青年人才专项"百人"联合项目(2016RC-BR01)
国家水产种质资源共享服务平台(2018DKA30470)资助
关键词
南渡江
相对重要性指数
鱼类多样性
鱼类生物完整性指数
河流健康
Nandujiang River
relative importance index
fish diversity
fish-based biotic integrity index
river health.
