基于大型底栖动物完整性指数的龙感湖健康评价  

Health Assessment of Longgan Lake Using Benthic Index ofBiotic Integrity

作　　者：章运超[1,2] 朱孔贤[1,2] 柴朝晖[1,2] 葛李灿 闵凤阳[1,2] 彭增辉 ZHANG Yun-chao;ZHU Kong-xian;CHAI Zhao-hui;GE Li-can;MIN Feng-yang;PENG Zeng-hui(River Research Department,Changjiang River Scientific Research Institute,Wuhan 430010,China;Key Laboratory of Ministry of Water Resources on River and Lake Regulation and Flood Control in the Middle and Lower Reaches of Yangtze River,Changjiang River Scientific Research Institute,Wuhan 430010,China;Hunan Shuitiandi Environmental Protection Technology Co.,Ltd.,Changsha 410221,China)

机构地区：[1]长江科学院河流研究所,武汉430010 [2]长江科学院水利部长江中下游河湖治理与防洪重点实验室,武汉430010 [3]湖南水天地环保科技有限公司,长沙410221

出　　处：《长江科学院院报》2023年第6期21-28,34,共9页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51809012);长江航道局科技项目(2016-000052-55-01-000486)。

摘　　要：龙感湖位于安徽省华阳河湖群自然保护区,生态价值突出,应用底栖动物完整性指数科学评价湖泊水生态健康可为湖泊保护和管理提供依据。根据2021年4月在安徽省龙感湖10个监测点的底栖动物数据,通过对20个候选生物指标进行分布范围、判别能力及相关性分析,筛选出总物种数、优势类群数量百分比、软体动物个体数百分比、敏感类群种类数、粘附者种类数共5个核心参数组成完整性指数评价体系,采用比值法统一生物参数的量纲,累加各生物参数分值得到B-IBI值,利用四等分法确定湖泊健康分级标准。结果表明;湖区10个监测点中的3个为健康、4个为亚健康、2个为一般、1个为较差,整体水生态健康状况不容乐观。龙感湖东南部为健康、鄂皖交界水域为亚健康、东北部为一般,龙感湖东北部健康状况差可能是因为该区域位于支流二郎河入湖口,二郎河水体携带的生活污水和磷矿污染物富集在底泥中,进而影响了底栖生物完整性。Longgan Lake,located in the Huayang River and Lake Group Nature Reserve in Anhui Province,boasts significant ecological value.Scientific assessment of the lake’s water ecology using the Benthic Index of Biotic Integrity(B-IBI)provides a foundation for lake conservation and management.On the basis of benthic animal data collected from ten monitoring sites in Longgan Lake in April 2021,a comprehensive integrity index evaluation system was developed.The system comprises five core parameters:total species count,percentage of dominant group,percentage of mollusks,number of sensitive species,and number of adhesive species.Through analysis of the distribution range,discriminatory ability,and correlation of twenty candidate biological indicators,the most relevant parameters were identified.The dimensions of the biological parameters were standardized using the ratio method,and the scores for each parameter were aggregated to derive the B-IBI value.Lake health classification standards were established using the quartering process.The results revealed that among the ten monitoring sites in the lake area,three were classified as healthy,four as sub-healthy,two as fair,and one as poor.The overall water ecosystem health condition is not promising.The southeastern part of Longgan Lake was classified as healthy,while the water area at the border between Hubei and Anhui Provinces was categorized as sub-healthy,and the northeastern part as fair.The relatively poor health condition in the northeastern part of Longgan Lake may be attributed to its proximity to the entrance of the Erlang River,where the accumulation of domestic sewage and phosphate mining pollutants in the sediment has consequently impacted the integrity of benthic organisms.

关 键 词：大型底栖动物 生物完整性指数 健康评价 龙感湖 华阳河湖群 

分 类 号：X826[环境科学与工程—环境工程]