Temporal Variation and Assembly Process of Fish Communities in a Typical Canalized River After the 10-Year Fishing Ban.

IF 3.5 3区 生物学 Q1 BIOLOGY
Qiang Qin, Yuanfeng Li, Peng Chen, Ting Wei, Jianghaoyue Xu, Fubin Zhang, Tong Zhou
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引用次数: 0

Abstract

The Jialing River is a representative and typical canalized tributary in the upper Yangtze River basin. In the context of the 10-year fishing ban, it is imperative to elucidate the dynamics and assembly of fish communities in the Jialing River. In this study, field surveys were conducted during the flood and dry seasons from 2021 to 2025 at the Cangxi section of the Jialing River. Fifty fish species belonging to three orders and six families were collected in the study area, with Chanodichthys oxycephaloides, Hemibarbus labeo, Xenocypris davidi, and Siniperca chuatsi identified as dominant species. In addition, fish communities in this region exhibited significant temporal variations, clustering into flood season and dry season groups (p < 0.05). The result suggested that diversity indices were consistently higher in the flood season than the dry season and an increasing trend was observed during the sampling periods. Community assembly analysis revealed that the fish communities were mainly characterized by phylogenetic clustered structure, indicating environmental filtering as the deterministic process in the study area. Despite the steady recovery of fish biodiversity and resource following the fishing ban in the study area, further attention must be directed to other anthropogenic disturbances, especially habitat fragmentation. This study provides a scientific reference for fisheries management after the fishing ban in the Jialing River.

禁渔期后典型运河河道鱼类群落的时间变化与聚集过程
嘉陵江是长江上游具有代表性和典型性的渠化支流。在十年禁渔的背景下,研究嘉陵江鱼类群落的动态和聚集是当务之急。本研究在2021 - 2025年的汛期和旱季对嘉陵江沧溪段进行了野外调查。研究区共收集到6科3目50种鱼类,其中优势种为尖头棘鱼(Chanodichthys oxycephalaloides)、半barbus labeo、Xenocypris davidi和chuatsi sininiperca。此外,该地区鱼类群落呈现出显著的时间变化特征,分为丰水期和枯水期两类(p < 0.05)。结果表明,丰水期多样性指数始终高于枯水期,采样期间多样性指数呈上升趋势。群落聚集分析表明,鱼类群落主要以系统发育聚类结构为特征,表明环境过滤是研究区的决定性过程。尽管研究区鱼类生物多样性和资源在禁捕后稳步恢复,但必须进一步注意其他人为干扰,特别是生境破碎化。本研究为嘉陵江禁渔后的渔业管理提供了科学参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Biology-Basel
Biology-Basel Biological Science-Biological Science
CiteScore
5.70
自引率
4.80%
发文量
1618
审稿时长
11 weeks
期刊介绍: Biology (ISSN 2079-7737) is an international, peer-reviewed, quick-refereeing open access journal of Biological Science published by MDPI online. It publishes reviews, research papers and communications in all areas of biology and at the interface of related disciplines. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.
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