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Keywords = cyanophyte relative quantity index

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18 pages, 5272 KB  
Article
Effects of Seasonal Variation on Water Quality Parameters and Eutrophication in Lake Yangzong
by Weidong Xu, Lizeng Duan, Xinyu Wen, Huayong Li, Donglin Li, Yang Zhang and Hucai Zhang
Water 2022, 14(17), 2732; https://doi.org/10.3390/w14172732 - 1 Sep 2022
Cited by 42 | Viewed by 9890
Abstract
Understanding the seasonal variation characteristics and trends in water quality is one of the most important aspects for protecting and conserving lakes. Lake Yangzong water quality parameters and nutrients, including water temperature, dissolved oxygen (DO), pH, conductivity, Chlorophyll-a, phycocyanin, total nitrogen [...] Read more.
Understanding the seasonal variation characteristics and trends in water quality is one of the most important aspects for protecting and conserving lakes. Lake Yangzong water quality parameters and nutrients, including water temperature, dissolved oxygen (DO), pH, conductivity, Chlorophyll-a, phycocyanin, total nitrogen (TN) and total phosphorus (TP), were monitored in different seasons from 2015 to 2021. Based on the monitoring data, the temporal and spatial variations of various parameters were analyzed. The results showed that Lake Yangzong is a warm monomictic lake. The Pearson correlation coefficient and correlation analysis showed water quality parameters were significantly correlated and probably affected by temperature. Cyanobacteria were at risk of blooming in spring and autumn. The contents of TN and TP in winter were significantly higher than in summer, especially TN, with both reaching a peak at the epilimnion and hypolimnion in December 2020 (TN = 1.3 mg/L, TP = 0.06 mg/L). We also observed a dual risk of endogenous release and exogenous input. Therefore, strengthening the supervision for controlling eutrophication caused by human activities and endogenous release is urgently needed. Full article
(This article belongs to the Special Issue Plateau Lake Water Quality and Eutrophication: Status and Challenges)
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