三峡库区支流龙河和汝溪河浮游植物功能群的季节动态特征及其与环境的相关关系  

SEASONAL DYNAMICS OF PHYTOPLANKTON FUNCTIONAL GROUPS IN TRIBUTARIES OF THE THREE GORGES RESERVOIR:LONGHE RIVER AND RUXI RIVER,AND THEIR CORRELATIONS WITH ENVIRONMENTAL FACTORS

作　　者：刘香正 史邵华 张茟渲 王佳慧 马兰 黄钰轩 刘梅 阿依巧丽 曾波 LIU Xiang-Zheng;SHI Shao-Hua;ZHANG Yu-Xuan;WANG Jia-Hui;MA Lan;HUANG Yu-Xuan;LIU Mei;AYI Qiao-Li;ZENG Bo(School of Life Sciences,Southwest University,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education),Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region,Chongqing 400715,China)

机构地区：[1]西南大学生命科学学院,三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715

出　　处：《水生生物学报》2025年第5期134-145,共12页Acta Hydrobiologica Sinica

基　　金：水利部三峡工程运行安全综合监测重点支流水质水生态监测(JJ2013-016);国家科技基础性工作专项(2014FY1202002);国务院三峡办三峡后续工作库区生态与生物多样性保护专项(500002013BB5200002);重庆市大学生创新创业训练计划项目(S202410635411)资助。

摘　　要：根据不同季节的环境特点,研究于2021年春季(3月)、夏季(7月)、秋季(9月)和冬季(11月)对龙河和汝溪河浮游植物和水环境进行调查研究。结果表明,龙河共采集到浮游植物111种,隶属6门;汝溪河共采集到浮游植物142种,隶属7门。依照Padisak理论,在龙河和汝溪河共发现浮游植物功能群23个。龙河浮游植物优势功能群的季节演变规律:春季(B、L_(O)、MP、X1)→夏季(D、J、S_(N)、T_(B))→秋季(D、J、MP、P、T_(B))→冬季(B、D、MP、T_(B));汝溪河浮游植物优势功能群的季节演变规律:春季(B、D、X1、X2)→夏季(G、J、S1、X2)→秋季(S1、G、P)→冬季(D、J、MP、S1)。其中龙河和汝溪河的回水区受三峡工程蓄水的影响,浮游植物功能群呈现出更为相似的特征。根据浮游植物功能群与环境因子冗余分析(RDA)可知,水温(WT)、溶解氧(DO)、酸碱度(p H)、铵态氮(NH_(4)^(+)-N)、磷酸盐(PO_(4)^(3-)-P)是龙河和汝溪河浮游植物功能群分布的主要影响因素。研究为保护长江水生生态系统提供理论依据。According to the environmental characteristics of different seasons,this study conducted surveys on phytoplankton and water environment in Longhe River and Ruxi River during spring(March),summer(July),autumn(September),and winter(November)in 2021.The results showed that 111 phytoplankton species were collected in Longhe River,belonging to 6 phyla.A total of 142 species of phytoplankton were collected from Ruxi River,belonging to 7 phyla.According to Padisak theory,23 phytoplankton functional groups were identified in both Longhe River and Ruxi River.The seasonal changes of dominant functional groups of phytoplankton in Longhe River were as follows:spring(B,L_(O),MP,X1)→summer(D,J,S_(N),T_(B))→autumn(D,J,MP,P,T_(B))→winter(B,D,MP,T_(B)).The seasonal changes in Ruxi River were as follows:spring(B,D,X1,X2)→summer(G,J,S1,X2)→autumn(S1,G,P)→winter(D,J,MP,S1).The backwater areas of the Longhe River and Ruxi River were affected by the impoundment of the Three Gorges Project,leading to greater similarity in phytoplankton functional group composition.According to the redundancy analysis of phytoplankton functional groups and environmental factors,water temperature(WT),dissolved oxygen(DO),pH,ammonium nitrogen(NH_(4)^(+)-N),and phosphate(PO_(4)^(3-)-P)were the main factors affecting the phytoplankton distribution in the two rivers.This study provides a theoretical basis for protecting the aquatic ecosystem of the Yangtze River.

关 键 词：浮游植物 功能群 季节动态 三峡库区 

分 类 号：Q178.1[生物学—水生生物学]