水生态学杂志2024，Vol.45Issue(4)：73-81,9.DOI:10.15928/j.1674-3075.202207120259
怒江西藏段鱼类群落结构及多样性研究
Fish Community Structure and Diversity in the Xizang Section of Nujiang River
摘要
Abstract
In this study,we explored fish community structure and diversity in the Xizang section of Nujiang River based on eight fish surveys conducted from 2017 to 2020.Our aim was to evaluate the current condition of the fishery resource,provide scientific data to support fishery resource conservation and explore the factors influencing fish community diversity.The investigation was carried out at nine survey stations,from upstream to downstream,in the Xizang section Yuqu River,the primary tributary of Nujiang River.Sampling site and time of each collected specimen were recorded,along with biologi-cal measurements,and the species.A total of 23 fish species were collected,belonging to 9 genera,6 fami-lies and 2 orders,and including 6 species endemic to Nujiang River and 5 exotic species.In general,the number of fish species decreased as altitude increased.The dominant species in the study area were Schizothorax lantsangensiss,Ptychobarbus kaznakovi and Schizopygopsis thermalis,accounting for 96.28%of the total biomass and 91.25%of the total fish number.The Shannon diversity,Simpson domi-nance,Margalef richness and Pielou evenness indices ranged from 0.369-0.908,0.222-0.496,0.317-0.754 and 0.405-0.692,respectively,and fish diversity was low in the Xizang section of Nujiang River.Among species,there were four ecological types:benthic slow-flow,benthic interstitial,rapid-flow adsorbed,and hydrostatic middle-layer.The feeding type was generally omnivorous.The lowest similarity index of fish species was between the Chawalong Town section of the lower Nujiang River and the upper reaches of Naqu Dam(11.76%),and the highest was between the Zuokong section of Yuqu River and the lower reaches of Biru Dam(70.00%).Overall,the fish community in the study area was moderately disturbed,and the river sections between dams in the upper reach and the Yuqu River were highly disturbed.To protect fish diversity in the Xizang Section of Nujiang River and reduce the disturbance intensity,we recommend establishing a protection area for Yuqu River tributaries,strengthening fishery management throughout the watershed,standardizing fish release,and protecting and restoring the watershed.关键词
鱼类资源/群落结构/多样性指数/怒江西藏段Key words
fish resources/community structure/diversity index/the Xizang Section of the Nujiang River分类
生物科学引用本文复制引用
左硕,朱峰跃,陈大庆,刘绍平,段辛斌,刘明典..怒江西藏段鱼类群落结构及多样性研究[J].水生态学杂志,2024,45(4):73-81,9.基金项目
农业农村部财政专项"西藏重点水域渔业资源与环境调查" （）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金(2023TD09). （2023TD09）
