Fish Community Composition in the Emur River, a Tributary of the Upper Heilongjiang (Amur) Basin in China

文献类型： 外文期刊

第一作者： Zhang, Zepeng

作者： Zhang, Zepeng;Li, Shenhui;Pan, Lianghan;Wang, Haipeng;Jin, Hongyu;Lu, Wanqiao;Li, Lei;Zhang, Zepeng;Jin, Hongyu;Lu, Wanqiao;Li, Lei;Li, Shenhui;Pan, Lianghan

作者机构：

关键词： fish diversity; environmental factors; coldwater fish; Emur River

期刊名称：DIVERSITY-BASEL （ 影响因子：2.1； 五年影响因子：2.3 ）

ISSN：

年卷期： 2025 年 17 卷 4 期

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收录情况： SCI

摘要： This study investigated the fish species composition and environment of the Emur River, a tributary of the Upper Heilongjiang (Amur) River system, which is a typical extreme-cold region of China. From 2022 to 2024, 28 native species (27 species of fish and 1 species of lamprey), including 4 endangered species, were monitored from 14 sampling sites. When grouped according to the main stream vs. tributaries and summer vs. autumn, we found significant differences (p < 0.05) in the composition of the fish communities. In autumn, the main stream fish assemblage was dominated by common species that prefer a slow current, including Phoxinus phoxinus (33.7%), Lota lota (25.2%), and Phoxinus lagowskii (19.8%). The tributary fish assemblage was primarily composed of typical coldwater fish species, such as L. lota (48.9%), Cottus poecilopus (20.2%), and Thymallus grubii (18.1%). However, in summer, there was no significant difference between the main course and tributaries. Canonical correspondence analysis showed environmental factors, including water temperature, elevation, and dissolved oxygen, to have significant impacts on the fish distribution to an extent that varied with species. This study may contribute to the management of coldwater fish diversity in mountain rivers and the protection of aquatic species habitats in regions of extreme cold.

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