三峡水库汛期不同支流藻类群落结构特征及其影响因素
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摘要：
三峡水库运行后，开展库区藻类群落结构特征及其影响因素研究是深入认识三峡水库水华及防控的基础。为探究三峡水库汛期不同运行水位背景下的藻类群落结构及演替规律，于2021-2023年6至8月对香溪河、大宁河、小江藻类和环境因子进行了逐月调査。共检出藻类功能群 15 种,分别为 M、H1、MP、S1、Y、LM、W1、C、D、TB、J、G、F、P、E，其中 M功能群是各月共有的功能群。同一时期，3条支流库湾浮游藻类功能群高度一致，但不同支流库湾牛物量差异较大，整体上由大到小依次为小江，香溪河，大宁河。汛期前期(6.7月)浮游藻类功能群以 G和 Y,M为主，后期(8月)以 M功能群为主,水温及水位是影响浮游藻类功能群特征的重要因素;相比于水位绝对值,水位变幅对藻类密度影响较大,水位抬升幅度越大,藻类密度越低,证明通过水库调度保持动态水位对于缓解库湾水华具备可行性。
After the impoundment of the Three Gorges Reservoir(TGR), the study on the characteristics and influencing factors of phytoplankton funetional group(PFG) in reservoir is the basis for further understanding and controling the algae bloom in TGR. To explore the structure and succession rules of the algae community under different operational water levels.during the flood season in TGR, monthly surveys of algae and environmental factors in Xiangxi River, Daning River and Xiaoiang River were conducted from June to August 2021-2023, A total of 15 species of PFG were detected, which were M, H1,MP, S1, Y, LM, W1, C, D, TB, J, G, F, P, E, and M functional group were common in each month. During the same period, the funetional groups of planktonic algae in the reservoirs of the three tributaries were highly consistent, but the biomass in the reservoirs of different tributaries varied significantly, Generally speaking, from the largest to the smallest, they were:Xiaojiang River, Xiangxi River, and Daning River, The PFGs are mainly G, Y and M in early flood season(june and July), and turned into M funetional group in later period(August). The algal community was affected by the water temperature and water level. Compared with the absolute water level, the variation of water level has a greater effect on algal density. The larger rise of water level, the lower the algal density, which proves that it is feasible to alleviate the water bloom in the tributary baythrough reservoir operation.
作者:
黄字波，王旭，廖周伟，卢露，范向军，龙良红，纪道斌，米武娟
Huang Yubo，Wang Xu，Liao Zhouwei，Lu Lu，Fan Xiangjun，Long Lianghong，Ji Daobin，Mi Wujuan
机构地区：
中国长江三峡集团有限公司流域枢纽运行管理中心；三峡大学三峡水库生态系统湖北省野外科学观测研究站；中国科学院水生生物研究所
引用本文：
黄字波，王旭，廖周伟等。三峡水库汛期不同支流藻类群落结构特征及其影响因素[J].学报(自然科学版),2025,53(6):37-43.( Huang Yubo, Wang Xu, Liao Zhouwei,et al.Characteristics and influencing factors of phytoplankton functional groups in different tributaries of the Three Gorges Reservoir during flood season[J].Journal of Henan Normal University(Natural Science Edition),2025,53(6):37-43.DOI:10.16366/j.cnki.1000-2367.2024.07.03.0001.)
基金：
水利部重大科技项目；长江水科学联合基金
关键词：
藻类功能群；汛期;水位；三峡水库
phytoplankton functional group; flood season; water level; Three Gorges Reservoir
分类号：
X524
