【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；

【Author】 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-ming;WANG De-qiang;HU Yin-chang;

【机构】 中国水产科学研究院珠江水产研究所农业部休闲渔业重点实验室广东省现代休闲渔业工程技术中心； 上海海洋大学水产与生命学院； 海南省海洋与渔业科学院； 西南大学动物科学学院； 肇庆大华农生物药品有限公司；

【摘要】 根据2016-2017年南渡江鱼类资源全面调查数据,通过分析渔获生物量、相对重要性指数IRI、Pielou’s均匀性指数、Margalef丰富度指数和Shannon-Weiner多样性指数评估了南渡江的鱼类生物多样性。此外,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发现:群落中存在尼罗罗非鱼(Oreochromis niloticu)、鳙(Aristichthys nobilis)、海南似鱎(Toxabramis houdemeri)等16种优势种;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和46分。研究结果表明:南渡江鱼类生物多样性和生物完整性保存完好,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。更多还原

【Abstract】 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), the Pielou’s uniformity index, the Margalef richness index and the Shannon-Weiner diversity index were used to evaluate fish biodiversity. Two sets of evaluation systems constructed by the fish-based biotic integrity index(IBI) were used to assess the river health status. Results showed that there were 16 kinds of dominant fish species in Nandujiang River, including Oreochromis niloticu, Aristichthys nobilis, Toxabramis houdemeri and so on. The results of fish-based biotic integrity showed that most of the historical fish were preserved in the River. The percentage indicators changed from 0.2% to 10.5%, while the species indices ranged from 0 to 4. Among all river sections of Nandujiang River, the final score of middle section was only 19 points, which was much lower than that of other river 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更多还原