陆水水库浮游植物群落结构特征及其影响因素  

Phytoplankton Community Structure and Influencing Factors in Lushui Reservoir

作　　者：宋高飞[1] 张羽珩 邱鹏飞 阮港 毕永红[1] SONG Gao-fei;ZHANG Yu-heng;QIU Peng-fei;RUAN Gang;BI Yong-hong(State Key Laboratory of FreshWater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,P.R.China;University of Chinese Academy of Sciences,Beijing 100049,P.R.China;University of Dalian Ocean,Dalian 116023,P.R.China)

机构地区：[1]中国科学院水生生物研究所,淡水生态与生物技术国家重点实验室,湖北武汉430072 [2]中国科学院大学,北京100049 [3]大连海洋大学,辽宁大连116023

出　　处：《水生态学杂志》2024年第5期49-57,共9页Journal of Hydroecology

基　　金：中国科学院野外站联盟项目(KFJ-SW-YW036);国家自然科学基金项目(51609239);中国博士后科学基金面上基金(2016M602394)。

摘　　要：探究陆水水库浮游植物群落组成及环境因子的时空特征,对水库生态系统的管理与保护具有重要意义。2020年7月(雨季)和12月(旱季),对陆水水库10个采样点的浮游植物和水质理化因子进行了调查分析。结果表明,2次调查共采集到浮游植物6门59属63种,其中绿藻种类最多,有31种,硅藻、蓝藻次之,分别为13种、12种;优势种主要为蓝藻门的尖头藻(Raphidiopsis sp.)、水华束丝藻(Aphanizomenon flos-aquae)、长孢藻(Dolicho-spermum sp.)以及硅藻门的颗粒直链藻(Melosira granulata);细胞密度的变化范围为0.03×10^(7)~6.27×10^(7)个/L,平均值为2.08×10^(7)个/L;雨季和旱季浮游植物多样性指数差异不显著(P>0.05);变差分解和冗余分析结果显示,陆水水库浮游植物群落结构在雨季和旱季存在显著差异,该差异主要受营养盐、水温(WT)、pH的影响;环境过滤作用在驱动陆水水库浮游植物群落构建过程中占主导地位;优势物种丰度与环境因子的冗余分析显示浮游植物优势类群与WT、总氮TN、高锰酸盐指数CODMn具有显著的相关性。In this study,we explored the phytoplankton community structure and influencing factors in Lushui reservoir during different hydrological periods.Investigation of phytoplankton and water environmental factors was carried out at ten sampling sites in July(wet season)and December(dry season)of 2020.A total of 63 phytoplankton species belonging to 59 genera and 6 phyla were identified,with dominance by Chlorophyta(31 species),followed by Bacillariophyta(13 species),Cyanophyta(12 species),Dinophyta(4 species),Euglenophyta(2 species),and Cryptophyta(1 species).Among them,50 phytoplankton species were observed in wet season and 41 in the dry season.The dominant species in Lushui reservoir during the investigation were Raphidiopsis sp.,Aphanizomenon flos-aquae,Dolichospermum sp.and Melosira granulata.Phytoplankton cell density in Lushui reservoir varied from 0.03×10^(7) to 6.27×10^(7) cells/L,with an average value of 2.08×10^(7) cells/L.The Shannon-Wiener diversity,Pielou evenness and Margalef richness indices of the phytoplankton community were in the respective ranges of 0.77-2.21,0.17-0.59 and 1.74-11.06 in wet season,and 0.30-2.75,0.12-0.62,and 1.55-6.16 in dry season.Phytoplankton diversity did not vary significantly with season(P>0.05).However,variation partitioning and redundancy analysis did indicate significant seasonal variation in the phytoplankton community in Lushui reservoir,and the differences were primarily affected by nutrient level,water temperature,and pH.Environmental filtration was the primary means for determining phytoplankton community structure in Lushui reservoir.The abundance of dominant species was significantly correlated with the water temperature,total nitrogen,and chemical oxygen demand.This study provides guidance for ecosystem management in the reservoir.

关 键 词：浮游植物 群落结构 水质理化因子 环境过滤 空间扩散 陆水水库 

分 类 号：Q145[生物学—生态学] X824[生物学—普通生物学]