ArticleEcology and evolution2026
Findings From the Pearl River Basin: Dissolved Oxygen Dominates Functional Trait Filtering and Diversity Patterns in Urban Rivers.
Article in Ecology and evolution, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Urbanization of river systems introduces novel environmental stressors-such as industrial pollutants and domestic wastewater-that impose selective pressures on aquatic species and reshape fish community structure. This study investigates the effects of urbanization on fish community in the Pearl River Basin, comparing the highly urbanized Huadi River with the relatively natural Zengjiang River. We conducted field surveys of fish assemblages at 44 sampling sites along both urbanized and natural rivers during summer and winter-spring in 2024, measuring environmental variables and fish functional traits. Indicator value analysis was utilized to identify species linked to specific river types. R-L-Q analysis (RLQ) was performed on the relationships between environmental factors and functional traits, and structural equation model (SEM) was used to test causal pathways between key environmental factors, trait combinations, and community diversity. Results showed marked differences in fish community structure between urban and natural rivers. Urban rivers were dominated by a few tolerant species (e.g.,
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