雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用

doi:10.13292/j.1000-4890.202406.029

生态学杂志 ›› 2024, Vol. 43 ›› Issue (6): 1779-1788.doi: 10.13292/j.1000-4890.202406.029

雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用

巢欣,李晓东,杨清,刘惠秋,杨胜娴,巴桑^*

(西藏大学麦地卡自治区级湿地生态系统定位观测研究站，西藏大学生态环境学院青藏高原湿地与流域生态系统实验室，西藏大学地球第三极碳中和研究中心，拉萨 850000)

出版日期:2024-06-10 发布日期:2024-06-19

Seasonal succession characteristics of phytoplankton functional groups in the middle and upper reaches of the Yarlung Zangbo River as an indicator of water environment.

CHAO Xin, LI Xiaodong, YANG Qing, LIU Huiqiu, YANG Shengxian, BA Sang^*

(Provincial Level of Mitika Wetland Ecosystem Observation and Research Station in Tibet Autonomous Region, Laboratory of Qinghai-Tibet Plateau Wetland and Watershed Ecosystem, Earth Third Pole Carbon Neutrality Research Center, School of Ecology and Environment, Tibet University, Lhasa 850000, China).

Online:2024-06-10 Published:2024-06-19

摘要/Abstract

摘要： 浮游植物功能群具有揭示浮游植物群落演替规律和指示水环境的作用。雅鲁藏布江是中国重要的水系。本研究于2019年8月(夏季)、11月(秋季)和2020年5月(春季)对雅鲁藏布江中上游的浮游植物群落结构和环境因子进行调查，探讨浮游植物功能群的季节变化特征及其对水环境的指示作用。结果表明：（1）雅鲁藏布江中上游水体呈碱性，水温、流速、浊度在3个季节间存在显著差异。（2）雅鲁藏布江中上游共鉴定出浮游植物8门11纲24目44科121属，浮游植物群落结构整体呈硅藻-绿藻-蓝藻型。可将浮游植物划分为28个功能群，其中有16个优势功能群，且浮游植物功能群的季节变化明显。（3）冗余分析和方差分解分析发现，水温、pH、溶解氧是影响雅鲁藏布江中上游浮游植物优势功能群分布的主要环境因子。（4）基于3个季节的香农指数(0.56～3.09，均值为2.20)和生态状态指数(1.92～4.91，均值为3.63)的综合评价表明，雅鲁藏布江中上游的水质状态为“良好”。本研究揭示了高原河流浮游植物功能群特征及其对水环境的指示作用，为雅鲁藏布江中上游的水生态研究提供科学依据。

关键词: 雅鲁藏布江中上游, 浮游植物功能群, 季节演替, 水环境状态

Abstract: The functional group composition of phytoplankton can reveal community succession pattern and indicate the quality of water environment. The Yarlung Zangbo River is an important water system in China. The phytoplankton community structure and water environmental factors in the middle and upper reaches of the Yarlung Zangbo River were investigated in August (summer) and November (autumn) of 2019 and in May (spring) of 2020 to explore the seasonal variations of phytoplankton functional groups and their indicative roles on water environment. The results showed that: (1) Water in the middle and upper reaches of Yarlung Zangbo River was alkaline, with significant differences in water temperature, velocity and turbidity among the three seasons. (2) A total of 121 genera of phytoplankton were identified, belonging to 8 phyla, 11 classes, 24 orders, 44 families. The phytoplankton community structure was diatomic-green algae-cyanobacteria type as a whole. The phytoplankton community could be divided into 28 functional groups with 16 dominant functional groups. The composition of phytoplankton functional groups varied obviously with seasons. (3) The results of redundancy analysis and variance partitioning analysis showed that water temperature, pH, and dissolved oxygen content were the main environmental factors influencing the distribution of dominant functional groups. (4) The comprehensive evaluation based on the Shannon index (0.56-3.09, with an average of 2.20) and the ecological status index (1.92-4.91, with an average of 3.63) in three seasons showed that water quality of the middle and upper reaches of the Yarlung Zangbo River was at the level of “good”. This study revealed the characteristics of phytoplankton functional groups and their indicative roles on water environment, and provided a scientific basis for aquatic ecological research in the middle and upper reaches of the Yarlung Zangbo River.

Key words: the middle and upper reaches of Yarlung Zangbo River, phytoplankton functional group, seasonal succession, state of water environment

巢欣, 李晓东, 杨清, 刘惠秋, 杨胜娴, 巴桑. 雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用[J]. 生态学杂志, 2024, 43(6): 1779-1788.

CHAO Xin, LI Xiaodong, YANG Qing, LIU Huiqiu, YANG Shengxian, BA Sang. Seasonal succession characteristics of phytoplankton functional groups in the middle and upper reaches of the Yarlung Zangbo River as an indicator of water environment.[J]. Chinese Journal of Ecology, 2024, 43(6): 1779-1788.

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[2]	王东伟, 陈永进, 周彦锋, 张敏莹, 俞振飞. 淮河中游种质资源保护区浮游植物功能群演替特征及其驱动因子 [J]. 生态学杂志, 2023, 42(11): 2646-2654.
[3]	彭梦, 吴嘉伟, 李罗新, 谭凤霞, 何秋杰, 吴泽成, 柴毅. 澜沧江小湾库区2017—2019夏季浮游植物功能群特征及其环境驱动因子 [J]. 生态学杂志, 2022, 41(1): 50-57.

雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用

Seasonal succession characteristics of phytoplankton functional groups in the middle and upper reaches of the Yarlung Zangbo River as an indicator of water environment.

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