Ecological Health Status of the Yitong River, China, Assessed with the Planktonic Index of Biotic Integrity

The Yitong River Basin is the main northern urban river basin in China, and its ecological health has become an important issue of public interest. In 2021, the plankton community and main water quality parameters of the Yitong River were monitored quarterly. An evaluation system was established bas...

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Veröffentlicht in:Water (Basel) 2022-10, Vol.14 (19), p.3191
Hauptverfasser: Zhao, Ke, Dong, Ang, Wang, Shuwei, Yu, Xiangfei
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Dong, Ang
Wang, Shuwei
Yu, Xiangfei
description The Yitong River Basin is the main northern urban river basin in China, and its ecological health has become an important issue of public interest. In 2021, the plankton community and main water quality parameters of the Yitong River were monitored quarterly. An evaluation system was established based on the Planktonic Index of Biotic Integrity (P–IBI) to assess the spatial and temporal variability in river health. To verify the feasibility of the P–IBI, its assessment results were compared with those of the water quality index (WQI), and the main factors affecting the P–IBI in different seasons were analyzed using correlation analysis between P–IBI metrics and environmental factors. Seasonal comparisons showed that most sampling sites exceeded the “moderate” level in spring and autumn, followed by winter. The worst assessment results occurred in summer. Urban river reaches were more polluted than reaches in rural areas. Regarding driving factors, hydraulic effects on the P–IBI in spring and autumn were significantly stronger than other environmental factors. In summer and winter, special attention should be paid to the input of nitrogen compounds and organic pollutants. Trends based on the P–IBI and the WQI differed in winter, but site patterns were consistent between both indices. The results provide a theoretical basis and data support for the health maintenance of the Yitong River.
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In 2021, the plankton community and main water quality parameters of the Yitong River were monitored quarterly. An evaluation system was established based on the Planktonic Index of Biotic Integrity (P–IBI) to assess the spatial and temporal variability in river health. To verify the feasibility of the P–IBI, its assessment results were compared with those of the water quality index (WQI), and the main factors affecting the P–IBI in different seasons were analyzed using correlation analysis between P–IBI metrics and environmental factors. Seasonal comparisons showed that most sampling sites exceeded the “moderate” level in spring and autumn, followed by winter. The worst assessment results occurred in summer. Urban river reaches were more polluted than reaches in rural areas. Regarding driving factors, hydraulic effects on the P–IBI in spring and autumn were significantly stronger than other environmental factors. In summer and winter, special attention should be paid to the input of nitrogen compounds and organic pollutants. Trends based on the P–IBI and the WQI differed in winter, but site patterns were consistent between both indices. 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subjects Agricultural production
Aquatic ecosystems
Autumn
Chemical oxygen demand
Correlation analysis
Distribution
Environmental aspects
Environmental factors
Eutrophication
Hydrology
Identification and classification
Laboratories
Measurement
Nitrates
Nitrogen
Plankton
Pollutants
Public concern
River basins
River ecology
Rivers
Rural areas
Seasonal comparisons
Spring
Spring (season)
Summer
Testing
Urban areas
Water quality
Winter
title Ecological Health Status of the Yitong River, China, Assessed with the Planktonic Index of Biotic Integrity
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