Environmental DNA Reveals the Fish Community Structure Exhibited Instability and Trend of Miniaturization in the Xijiang River Basin of the Guizhou

IF 2.3 2区生物学 Q2 ECOLOGY

Ecology and Evolution Pub Date : 2025-09-19 DOI:10.1002/ece3.71825

Xiuhui Ma, Fujiang Huang, Ruiyuan Zhang, Tianhong Liu, Tianyang Zhang, Peng Zeng

{"title":"Environmental DNA Reveals the Fish Community Structure Exhibited Instability and Trend of Miniaturization in the Xijiang River Basin of the Guizhou","authors":"Xiuhui Ma, Fujiang Huang, Ruiyuan Zhang, Tianhong Liu, Tianyang Zhang, Peng Zeng","doi":"10.1002/ece3.71825","DOIUrl":null,"url":null,"abstract":"The seasonal monitoring of fish communities was conducted in the Xijiang River Basin of Guizhou Province using environmental DNA (eDNA) metabarcoding technology. A total of 97 fish species were identified during the 2023 survey, representing a detection rate of 61.94% compared to historical records. The findings demonstrated the following: (1) Fish communities exhibited significant spatiotemporal heterogeneity, with species diversity and composition varying seasonally and spatially; (2) human activities, such as reservoir construction, have led to the potential trend toward miniaturization of fish populations and pose a severe threat to the survival of indigenous species; (3) water NH3-N, altitude, and pH emerged as the key environmental factors influencing community structure. This research elucidated the dynamic characteristics of riverine fish communities in karst mountainous regions and provided a scientific foundation for the adaptive management of river basin ecosystems. Furthermore, this study represents the validation of eDNA technology's monitoring efficiency in karst areas characterized by complex geographical environments, thereby confirming its application value in assessing biodiversity in mountainous aquatic systems.","PeriodicalId":11467,"journal":{"name":"Ecology and Evolution","volume":"15 9","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ece3.71825","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecology and Evolution","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ece3.71825","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The seasonal monitoring of fish communities was conducted in the Xijiang River Basin of Guizhou Province using environmental DNA (eDNA) metabarcoding technology. A total of 97 fish species were identified during the 2023 survey, representing a detection rate of 61.94% compared to historical records. The findings demonstrated the following: (1) Fish communities exhibited significant spatiotemporal heterogeneity, with species diversity and composition varying seasonally and spatially; (2) human activities, such as reservoir construction, have led to the potential trend toward miniaturization of fish populations and pose a severe threat to the survival of indigenous species; (3) water NH₃-N, altitude, and pH emerged as the key environmental factors influencing community structure. This research elucidated the dynamic characteristics of riverine fish communities in karst mountainous regions and provided a scientific foundation for the adaptive management of river basin ecosystems. Furthermore, this study represents the validation of eDNA technology's monitoring efficiency in karst areas characterized by complex geographical environments, thereby confirming its application value in assessing biodiversity in mountainous aquatic systems.

Abstract Image

查看原文本刊更多论文

环境DNA揭示了贵州西江流域鱼类群落结构的不稳定性和小型化趋势

采用环境DNA元条形码技术对贵州西江流域鱼类群落进行了季节性监测。在2023年的调查中，共鉴定了97种鱼类，与历史记录相比，检出率为61.94%。结果表明：(1)鱼类群落表现出明显的时空异质性，物种多样性和组成存在明显的季节和空间差异；(2)水库建设等人类活动导致了鱼类种群小型化的潜在趋势，对本地物种的生存构成了严重威胁；(3)水体NH3-N、海拔和pH成为影响群落结构的关键环境因子。本研究阐明了喀斯特山区河流鱼类群落的动态特征，为流域生态系统的适应性管理提供了科学依据。此外，本研究验证了eDNA技术在地理环境复杂的喀斯特地区的监测效率，从而确认了其在山地水生系统生物多样性评估中的应用价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ecology and Evolution ECOLOGY-

CiteScore

4.40

自引率

3.80%

发文量

1027

审稿时长

3-6 weeks

期刊介绍： Ecology and Evolution is the peer reviewed journal for rapid dissemination of research in all areas of ecology, evolution and conservation science. The journal gives priority to quality research reports, theoretical or empirical, that develop our understanding of organisms and their diversity, interactions between them, and the natural environment. Ecology and Evolution gives prompt and equal consideration to papers reporting theoretical, experimental, applied and descriptive work in terrestrial and aquatic environments. The journal will consider submissions across taxa in areas including but not limited to micro and macro ecological and evolutionary processes, characteristics of and interactions between individuals, populations, communities and the environment, physiological responses to environmental change, population genetics and phylogenetics, relatedness and kin selection, life histories, systematics and taxonomy, conservation genetics, extinction, speciation, adaption, behaviour, biodiversity, species abundance, macroecology, population and ecosystem dynamics, and conservation policy.