渭河流域河流潜流水交换和重金属污染对大型无脊椎动物群落结构的影响
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中图分类号：X522 DOI：10. 16152/j. cnki. xdxbzr.2025-04-001
Abstract The impact of hyporheic exchange on the community structure of macroinvertebrates is a crucial topic in current river ecosystem health research.As a primary tributary of the Yelow River，the ecological status of the Weihe River Basin serves as a critical indicator of the overall health of the Yellw River ecosystem. In this study，we focus on the Weihe River Basin to explorethe efects of hyporheic exchange intensity and different degrees of heavy metals polution on the structure of macroinvertebrate communities.Macroinvertebrate and sediment samples were collected from 12 sites along the mainstream Wei River，Jing River，and Beiluo River from October to November 2O23.The falling-head permeameter test method was employed to measure the hydraulic conductivity and hyporheic exchange flux，while sediment heavy metal content，particle size distribution，and macroinvertebrate information were also determined. The research has 3 major findings ： ① a total of 277 macroinvertebrates，belonging to 3 phylums，4 class，8 orders，15 families，18 genera and 2O species， were collected from the 12 sampling sites，among which arthropods were the most abundant，folowed by mollusks.The highest average density was found in the Tanytarsus，while the highest biomass was found in the Bellamya purificata.Based on the Biological Pollution Index （BPI） clasification criteria，the sediments at each monitoring site are generallyat light to moderate pollution levels，while based on the Family Biotic Index （FPI）classification criteria，the sediments at each monitoring site are generally at clean levels; ② the comprehensive pollution status of the study area was at a light to moderate pollution level， with relatively severe As pollution. Heavy metals （Zn，Pb） were positively correlated with the richness of macroinvertebrates； ③ the vertical hydraulic conductivity（ Kv ）of the hyporheic zone varied between O. 23 and 3.50 （ m/d ），showing significant differences in different rivers.Hyporheic water exchange is mainaly downweling.The research findings provide theoretical support for understanding the maintenance of aquatic ecosystem health in the Yellow River Basin.They also ofer a scientific basis for ecological protection and high-quality development in the region.
Keywordshyporheic exchange； macroinvertebrate; heavy metal; the Weihe River Basin
河水与地下水在河床沉积物中发生混合和交换的区域被称为潜流带（HZ）[1]。（剩余18453字）
