新安江流域(屯溪段)浮游植物群落结构及其与环境因子的关系  

Phytoplankton community structure and its relationship with environmental factors in Xin’anjiang River Basin( Tunxi section)

作　　者：张国庆 杨雨玲[1] 唐爱国 王丽 丁涛 王恒星 孟杨 陆沙龙 董丽丽[1] 段双全[2] 李伟[1] ZHANG Guo-qing;YANG Yu-ling;TANG Aiguo;WANG Li;DING Tao;WANG Heng-xing;MENG Yang;LU Sha-long;DONG Lili;DUAN Shuang-quan;LI Wei(College of Life and Environmental Sciences,Huangshan University,Huangshan 245041,China;College of Science,Tibet University,Lhasa 850000,China)

机构地区：[1]黄山学院生命与环境科学学院,黄山245041 [2]西藏大学理学院,拉萨850000

出　　处：《生态学杂志》2020年第2期527-540,共14页Chinese Journal of Ecology

基　　金：国家自然科学青年基金项目(31600317);安徽省教育厅自然科学一般项目(KJHS2018B08);安徽省教育厅高校人文社科研究重点(非遗基地)(SK2016A0885);高校优秀青年骨干人才国外访学项目(gxfx2017109);安徽省大学生创新创业项目(201710375016、201810375102、201810375112和201810375117)资助.

摘　　要：于2017—2018年对新安江流域(屯溪段)浮游植物群落结构进行季度调查,并分析群落结构组成与环境因子间的关系。结果表明:共鉴定浮游植物7门96属160种(含变种),以绿藻门(42属72种)、硅藻门(26属49种)和蓝藻门(15属19种)为主要优势门类;可见光(PAR)、紫外线A(UVA)和紫外线B(UVB)强度以夏季最强,春季次之,秋、冬季较弱;水体pH、溶解氧和温度具有季度差异性;整体上冬季氨氮(NH3-N)浓度和浊度显著高于其他季度,总磷(TP)浓度和氧化还原电位无明显季度差异;叶绿素a和类胡萝卜素受时空变化影响明显,夏、冬季较春、秋季高,不同站点间差异显著;Shannon指数、Simpson指数、Margalef指数以及Pielou指数不受季度更替和站点变化影响;水化学参数指示水质整体介于Ⅰ类与III类之间(I、II类居多),Shannon指数和Margalef指数反映水质为轻污或清洁,污染指示种评估水体处于乙型中污水生物带,综合水化学及生物学指标,表征流域水质总体较好;冗余分析表明,新安江流域(屯溪段)浮游植物各门属种数均与NH3-N和TP呈正相关,UVB与硅藻门有较强的负相关性;PAR、UVA、UVB和温度是调控浮游植物丰度的主要环境因子,与硅藻门、甲藻门和裸藻门丰度呈负相关,而与绿藻门、蓝藻门、金藻门和隐藻门丰度呈正相关。We investigated the seasonal variation of phytoplankton community structure and its relationship with environmental factors in Xin’anjiang River Basin(Tunxi section)from 2017 to2018.A total of 160 species(including variants)from 96 genera belonging to seven phyla were identified,among which,Chlorophyta(72 species from 42 genera),Bacillariophyta(49 species from 26 genera)and Cyanophyta(19 species from 15 genera)were dominant.Photosynthetically active radiation(PAR),UVA and UVB had the highest intensity in summer,followed by spring,autumn and winter.The pH,dissolved oxygen,and water temperature differed among seasons.The concentration of ammonia nitrogen(NH3-N)concentration and turbidity were significantly higher in winter than that in other seasons.There was no significant difference in total phosphorus(TP)concentration and oxidation reduction potential among the four seasons.Chlorophyll a and carotenoid concentrations varied spatially and temporally,with higher concentrations in summer and winter than in spring and autumn.The Shannon index,Simpson index,Margalef index and Pielou index did not change across seasons and sampling sites.Water quality was between the criteria of type I and type III,with most of which being located in type I and type II.The pollution indicator species showed a -mesosaprobic zone.Shannon index and Margalef index revealed a slight pollution or non-pollution status of the studied area.Water quality of Xin’anjiang River Basin(Tunxi section)was generally in good condition according to the comprehensive analyses of both chemical and biological indices.Redundancy analysis results showed that the number of phytoplankton species in each phylum had positive relationship with NH3-N and TP,where UVB had a strong negative relationship with Bacilariophyta.PAR,UVA,UVB and water temperature were the main factors regulating phytoplankton abundance,which had positive relationship with abundance of Bacillariophyta,Dinophyta and Euglenophyta but negative relationship with abundance of Chloropyta,Cyano

关 键 词：新安江流域(屯溪段) 浮游植物 群落结构 环境因子 冗余分析 

分 类 号：Q948.8[生物学—植物学]