Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing, 100875, China.
Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, 454000, China.
Environ Sci Pollut Res Int. 2023 Apr;30(19):56410-56424. doi: 10.1007/s11356-023-26314-9. Epub 2023 Mar 14.
To know well the ecosystem health status of Qin River, a main tributary of the Yellow River and the largest river in Jincheng region, macroinvertebrates from 49 sampling sites in the Qin River and its largest tributary, the Dan River, were investigated, and community characteristics were analyzed in the autumn of 2020; a Benthic index of Biotic Integrity (B-IBI) was established based on four metrics by a series of steps. The results showed that a total of 38 species of macroinvertebrates were collected and identified, belonging to 6 orders and 19 families, consisting of 17 Insecta species, 13 Gastropoda species, and 4 Oligochaeta species. Four species in Insecta belonged to EPT (E, Ephemeroptera; P, Plecoptera; T, Trichoptera); 10 species in Insecta belonged to Chironomidae and Tipulidae families. All species in Gastropoda belonged to Basematophora order, and, especially, Bellamya aeruginosa is highly tolerant to nutrients. All species in Oligochaetes belonged to Tubificidae family, which indicates eutrophication and low-dissolved oxygen. The dominant species in the study were Ephemera orientalis, Chironomus riparius Meigen, and Limnodrilus claparedianus. The final B-IBI scores varied from 0.75 to 3.75, with 5 sites in "excellent," 10 sites in "good," 10 sites in "normal" status, 12 sites in "poor" status, 12 sites in "very poor." "Very poor" and "poor" sites were mainly located in the middle reach of the Qin River and upper-middle reach of the Dan River in Jincheng region. B-IBI strongly differentiated the reference sites and impaired sites, suggesting the suitability of the B-IBI in the Qin River basin. Significantly negative correlations between NH-N, TN, and B-IBI indicated the B-IBI characterized well the influence of nitrogen pollution.
为了充分了解黄河一级支流沁河和晋城市最大河流丹河的生态系统健康状况，2020 年秋季对沁河及其最大支流丹河的 49 个采样点进行了大型底栖无脊椎动物调查，并分析了群落特征；通过一系列步骤，基于 4 项指标建立了生物完整性指数（B-IBI）。结果表明，共采集并鉴定了 38 种大型底栖无脊椎动物，隶属于 6 目 19 科，其中昆虫纲 17 种、腹足纲 13 种、寡毛纲 4 种。昆虫纲的 4 种属于 EPT（蜉蝣目、石蝇目、毛翅目）；昆虫纲的 10 种属于摇蚊科和长翅目科。腹足纲的所有物种均属于Basematophora 目，尤其是铜锈环棱螺（Bellamya aeruginosa）对营养物质具有很强的耐受性。寡毛纲的所有物种均属于颤蚓科，这表明水体处于富营养化和低溶解氧状态。研究中的优势物种为东方蜉、摇蚊幼虫和苏氏尾鳃蚓。最终的 B-IBI 得分从 0.75 到 3.75 不等，其中 5 个站点为“优秀”，10 个站点为“良好”，10 个站点为“正常”，12 个站点为“较差”，12 个站点为“极差”。“极差”和“较差”站点主要位于晋城市沁河中游和丹河中上段。B-IBI 很好地区分了参照站点和受损站点，表明该指数在沁河流域具有适用性。NH-N、TN 与 B-IBI 呈显著负相关，表明 B-IBI 很好地反映了氮污染的影响。
