生态与农村环境学报2025，Vol.41Issue(6)：781-791,11.DOI:10.19741/j.issn.1673-4831.2024.0675
河西内陆河流域大型底栖动物群落结构及生物多样性特征
Characteristics of Macro-zoobenthos Community Structure and Biodiversity in the Hexi Inland River Basin
摘要
Abstract
In order to study the relationship between macro-zoobenthos community structure,biodiversity and environmen-tal factors in Hexi inland river basin,the macro-zoobenthos,water physical and chemical indicators and environmental fac-tors of two typical arid inland rivers,Taolai River and Shiyang River,were investigated in August 2023.The results show that a total of 52 species of benthic animals were collected,belonging to 3 phyla,6 classes,14 orders,32 families and 44 genera.Arthropods were dominant in the whole basin.The average density and biomass were 23 m-2 and 1.859 9 g·m-2 in Taolai River,32 m-2 and 2.721 1 g·m-2 in Shiyang River,respectively.The density of macro-zoobenthos in the two typical inland rivers showed that the downstream agricultural section(251 m-2)>the middle reaches of the urban section(170 m-2)>the upstream mountain section(76 m-2),and the biomass showed that the middle reaches of the urban sec-tion(19.544 4 g·m-2)>the downstream agricultural section(16.657 5 g·m-2)>the upstream mountain section(5.027 8 g·m-2).The distribution characteristics of Shannon-Wiener diversity index and Margalef richness index in the middle and lower reaches were greater than those in the upper reaches.Simpson dominance index and Pielou evenness in-dex were relatively stable in the two rivers.According to the analysis of Jaccard similarity index,there were few common species and low similarity of community structure between the sampling points of Taolai River and Shiyang River.It showed that the community structure of macro-zoobenthos in the two rivers was significantly different in spatial distribution due to the differences in river habitat such as river heterogeneity,riverbed composition,aquatic vegetation and sediment composi-tion.The main environmental factors affecting the community structure of macro-zoobenthos were aquatic richness,sedi-ment,elevation(ALT),vegetation coverage,five-day biochemical oxygen demand(BOD5),conductivity(EC),dis-solved oxygen(DO),total dissolved solids(TDS)and salinity.关键词
河西内陆河/大型底栖动物/群落结构/生物多样性/生境因子Key words
Hexi inland river/macro-zoobenthos/community structure/species diversity/environmental factors分类
环境科学引用本文复制引用
王昱,信雅玲,李浩霖,苗天,袁兴鹏,李能安,雒天峰,王娟..河西内陆河流域大型底栖动物群落结构及生物多样性特征[J].生态与农村环境学报,2025,41(6):781-791,11.基金项目
国家自然科学基金(52169015) （52169015）
甘肃省重点研发计划(23YFFA0020) （23YFFA0020）
甘肃省2024年水利科研与技术推广项目(24GSLK027) （24GSLK027）
