滆湖入湖河口区叶绿素a时空变化特征及相关环境因子分析

doi:10.19741/j.issn.1673-4831.2020.0804

Abstract

Abstract: Chlorophyll a (Chl-a), physical and chemical factors of water samples in the 13 estuaries of Gehu Lake were monitored and analyzed monthly for 2 years from January 2018 to January 2020.The spatio-temporal characteristics and their correlation with major environmental factors were studied such as water temperature, pH and nutrients. The results show that:(1) ρ(Chl-a) changed significantly over time, with the highest in summer, followed by autumn and winter, and the lowest in spring; (2) In terms of spatial distribution, ρ(Chl-a) in the estuary area of the northwest was significantly higher than that in the south of Gehu Lake; (3) ρ(Chl-a) is extremely significantly positively correlated with water temperature, pH, and permanganate index (COD_Mn), negatively correlated with DO, and had no significant correlations with ρ(TN), ρ(NH₄⁺-N), ρ(NO₃^--N), ρ(PO₄^3--P) and ρ(DOC). The logarithm of ρ(Chl-a) had a significant positive correlation with the logarithm of TP, and a significant negative correlation with the logarithm of N/P ratio; (4) Phosphorus was the main determinant of ρ(Chl-a) in the estuary area of Gehu Lake. The results can provide reference for the water environment treatment of Gehu Lake.

Key words: estuaries of Gehu Lake, chlorophyll a (Chl-a), environmental factors, correlation analysis

CLC Number:

X522

LIU Yu, YANG Fei, ZHANG Yi-min, GAO Yue-xiang, ZHANG Zhi-wei, ZHU Yue-ming, KONG Ming, ZHAO Yuan, QIAN Wen-han. Temporal and Spatial Variation Characteristics of Chlorophyll a and Analysis of Related Environmental Factors in the Estuary Area of Gehu Lake[J]. Journal of Ecology and Rural Environment, 2021, 37(6): 733-739.

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Temporal and Spatial Variation Characteristics of Chlorophyll a and Analysis of Related Environmental Factors in the Estuary Area of Gehu Lake

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