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Volume 18
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10.3390/d18090568
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Article

Community Structure Characteristics of Aquatic Organisms and Their Responses to Environmental Factors in the Yunxi Area

by
Jing Guo
1,
Kai Yu
2,
Wenrui Guo
1,
Bingyan Ma
1,
Fang Liu
1,
Hongxing Zhang
1,
Weijian Guo
1,
Leilei Zhang
1 and
Rui Ding
2,*
1
PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China
2
Nanjing Hydraulic Research Institute, Nanjing 210029, China
*
Author to whom correspondence should be addressed.
Diversity 2026, 18(9), 568; https://doi.org/10.3390/d18090568
Submission received: 21 July 2026 / Revised: 8 September 2026 / Accepted: 9 September 2026 / Published: 15 September 2026
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Abstract

Urban plain river networks often suffer from ecosystem impairment due to sluggish hydrodynamics and insufficient water replenishment. This study assessed the aquatic ecosystem of the Yunxi area in Hangzhou, a river network characterized by insufficient hydrodynamics. A systematic ecological survey of phytoplankton, zooplankton, and macrobenthic communities was conducted at 11 key sites, and their potential driving mechanisms were explored by integrating physicochemical water analysis with redundancy analysis (RDA). The results indicate generally weak hydrodynamic conditions and elevated nitrogen concentrations at several sampling sites. The aquatic biological communities were characterized by relatively high abundances of several pollution-tolerant taxa, mainly including Bacillariophyta, Rotifera, Oligochaeta, and Gastropoda. Furthermore, local dominance of Cyanophyta and Cryptophyta at specific sites indicate spatial variation in community composition. RDA further indicated that organic pollution and nutrient enrichment were closely associated with variations in aquatic community composition. According to the observed community patterns, the weak water exchange combined with nutrient and organic-matter enrichment may be associated with variations in the aquatic community composition. Therefore, targeted ecological water supplementation might be useful to enhance the regional hydrodynamic conditions, increase water exchange and reduce pollutant accumulation.
Keywords: urban plain river networks; aquatic organisms; environmental factors urban plain river networks; aquatic organisms; environmental factors

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MDPI and ACS Style

Guo, J.; Yu, K.; Guo, W.; Ma, B.; Liu, F.; Zhang, H.; Guo, W.; Zhang, L.; Ding, R. Community Structure Characteristics of Aquatic Organisms and Their Responses to Environmental Factors in the Yunxi Area. Diversity 2026, 18, 568. https://doi.org/10.3390/d18090568

AMA Style

Guo J, Yu K, Guo W, Ma B, Liu F, Zhang H, Guo W, Zhang L, Ding R. Community Structure Characteristics of Aquatic Organisms and Their Responses to Environmental Factors in the Yunxi Area. Diversity. 2026; 18(9):568. https://doi.org/10.3390/d18090568

Chicago/Turabian Style

Guo, Jing, Kai Yu, Wenrui Guo, Bingyan Ma, Fang Liu, Hongxing Zhang, Weijian Guo, Leilei Zhang, and Rui Ding. 2026. "Community Structure Characteristics of Aquatic Organisms and Their Responses to Environmental Factors in the Yunxi Area" Diversity 18, no. 9: 568. https://doi.org/10.3390/d18090568

APA Style

Guo, J., Yu, K., Guo, W., Ma, B., Liu, F., Zhang, H., Guo, W., Zhang, L., & Ding, R. (2026). Community Structure Characteristics of Aquatic Organisms and Their Responses to Environmental Factors in the Yunxi Area. Diversity, 18(9), 568. https://doi.org/10.3390/d18090568

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