Impact of anthropogenic activities on changes of ichthyofauna in the middle and lower Xiang River
Impact of anthropogenic activities on changes of ichthyofauna in the middle and lower Xiang River
复制标题
人类活动对湘江中下游鱼类区系变化的影响
DOI：
10.1016/j.aaf.2021.06.007
复制
发表时间：
2022-11-01
影响因子：
--
通讯作者：
Li, Deliang
中科院分区：
文献类型：
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作者：
Zeng, Cong;Wen, Yao;Li, Deliang
随着人口的增加，鱼类群落作为河流水系的重要组成部分，不可避免地受到人类活动的影响。为了调查这些影响，我们通过环境 DNA 元条形码对中国中部湘江沿岸城市和郊区的鱼类群落组成进行了表征。结果显示，共鉴定出32种，其中以鲤形目居多。分析表明，三个城市地区的鱼类群落没有显着差异。然而，河岸固化区和非固化区之间存在显着差异，这表明渠道化显着影响了生物多样性和丰度。在所有检查地点都发现了一种外来物种，Clarias gariepinus，它与十种本地物种呈负相关。此外，人口和酸化也与多样性呈负相关。我们的研究结果清楚地表明，人类活动的后果塑造了鱼类动物群，并导致城市河流的生物多样性丧失。
With the population increasing, fish communities, as important components in the river system, were inescapably impacted by human activities. To investigate these impacts, we characterized the fish community's composition by environmental DNA metabarcoding in the urban and suburban sites along Xiang River in central China. The results showed that 32 species were identified, and most species were from Cypriniform. The analysis indicated no significant differences in fish communities among the three urban areas. However, significant differences were observed between the bank solidified and non-solidified areas, which indicated that the channelization significantly influenced the biodiversity and abundances. An alien species,Clarias gariepinus, was discovered in all examined sites, and it was negatively associated with ten native species. Furthermore, human populations and acidification were also negatively related to diversity. Our findings clearly showed that the consequences of anthropogenic activities shaped ichthyofauna and caused biodiversity loss in the urban river.