螳螂川—普渡河流域浮游植物群落特征及环境影响因子
Phytoplankton community characteristics and environmental impact factors in Tanglang River-Pudu River basin
秦海娇 1史秋月 2支国强 3王永强 2韩镇阳 2毕斌 2杨莉园 2霍笑康 2陈金明 2卢少勇 2刘宪斌4
作者信息
- 1. 天津科技大学海洋与环境学院;湖泊水污染治理与生态修复国家工程实验室,中国环境科学研究院;国家环境保护洞庭湖科学观测研究站
- 2. 湖泊水污染治理与生态修复国家工程实验室,中国环境科学研究院;国家环境保护洞庭湖科学观测研究站
- 3. 昆明市生态环境科学研究院
- 4. 天津科技大学海洋与环境学院
- 折叠
摘要
浮游植物和环境因子是水生态的重要组成部分,目前对于高原河流浮游植物与环境影响因子之间关系的研究还不充分.以云贵高原河流螳螂川—普渡河流域为研究对象,在2022年4-11月(枯水期、丰水期、平水期)对该河流域的浮游植物和水体进行采样调查,运用多样性指数、综合营养状态指数和冗余分析(RDA)等对螳螂川—普渡河流域的水质及浮游植物与环境因子之间的关系进行解析,探讨该流域浮游植物群落特征及其与环境因子的关系.结果表明:调查期间共检出浮游植物8门128属261种,以蓝藻门、绿藻门和硅藻门为主,水华束丝藻(Aphanizomenon flos-aquae)为全年优势种.浮游植物群落结构及多样性时空变化显著,与枯水期和平水期相比,丰水期细胞密度较少,生物多样性较高,螳螂川干流的细胞密度高于其他流域.综合营养状态指数表明流域整体处于中营养至重富营养水平,且螳螂川干流的富营养化水平最严重.RDA分析揭示了不同子流域影响浮游植物群落结构的主导因素不同,螳螂川干流为高锰酸盐指数(CODMn)和pH,螳螂川支流为CODMn,普渡河干流为流量和硝酸盐氮,普渡河支流为水温.
Abstract
Phytoplankton and environmental factors are important components of water ecology,but there are currently few studies on the relationship between phytoplankton and environmental impact factors in plateau rivers.Therefore,Tanglang River-Pudu River basin in the Yunnan-Guizhou Plateau was taken as the research object,and the phytoplankton and water bodies in the river basin were sampled and investigated from April to November(dry season,wet season,and level season)in 2022.The diversity index,comprehensive trophic state index,and redundancy analysis(RDA)were used to analyze the water quality of Tanglang River-Pudu River basin and the relationship between phytoplankton and environmental factors,and to explore the characteristics of phytoplankton communities in the basin and their relationship with environmental factors.The results showed that a total of 261 species belonging to 128 genera and 8 phyla of phytoplankton were detected,mainly including Cyanophyta,Chlorophyta and Bacillariophyta.Aphanizomenon flos-aquae was the dominant species throughout the year.The spatial and temporal changes of phytoplankton community structure and diversity were significant.Compared with the dry season and the level season,the cell density in the wet season was less and the biodiversity was higher.The cell density in the mainstream of the Tanglang River was higher than that in other basins.The comprehensive nutritional status index indicated that the whole basin was at the level of medium nutrition to heavy eutrophication,and the eutrophication level was the severest in the mainstream of the Tanglang River.The RDA analysis revealed that different sub-watersheds had different dominant factors influencing the community structure of phytoplankton.For the mainstream of the Tanglang River,the dominant factors were permanganate index(CODMn)and pH.For the tributary of the Tanglang River,the dominant factor was CODMn.For the mainstream of the Pudu River,the dominant factors were flow(Q)and nitrate nitrogen(NO3--N).For the tributary of the Pudu River,the dominant factor was water temperature(WT).
关键词
螳螂川—普渡河流域/浮游植物/群落特征/环境因子/冗余分析Key words
Tanglang River-Pudu River Basin/phytoplankton/community characteristics/environmental factors/redundancy analysis(RDA)引用本文复制引用
基金项目
云南省科技计划(202203AC100002-03-04)
水生态环境调查项目(4530100HT202200908)
云南省长江水生态环境保护研究项目(2022-LHYJ-02-0511-02)
出版年
2024
NETL
NSTL
万方数据