贵州高原红枫水库浮游植物中脂肪酸组成特征及影响因素  

Fatty acid composition and affecting factors of phytoplankton in Hongfeng Reservoir in Guizhou Plateau

作　　者：金爽 李秋华[1,2] 齐继清 王星 旷攀 陈文生 JIN Shuang;LI Qiu-hua;QI Ji-qing;WANG Xing;KUANG Pan;CHEN Wen-sheng(Guizhou Normal University,Guizhou Province Key Laboratory of Mountain Environmental Information System and Ecological Environment Protection,Guiyang 550001,China;International Joint Research Center for Water Ecology,Guizhou International Cooperative Research Base,Guiyang 550001,China)

机构地区：[1]贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室,贵阳550001 [2]贵州省国际合作研究基地水生态国际联合研究中心,贵阳550001

出　　处：《生态学杂志》2020年第10期3363-3370,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(U1612442);贵州省科技厅项目(黔科合平台人才[2020]6009);黔科合基础[2018]1110);贵州省教育厅项目(黔教合KY字[2017]032);贵阳市科技局项目([2019]-2-9)资助。

摘　　要：为探究水体浮游植物脂肪酸组成特征及影响因素,对采集于贵阳红枫水库3个采样点的浮游植物脂肪酸进行了研究。结果表明:红枫水库浮游植物以蓝藻为主;脂肪酸组成中饱和脂肪酸(SFA)占主导地位,二十二碳六烯酸(DHA)与二十碳五烯酸(EPA)含量均比较低。水体营养水平能影响脂肪酸组成,富营养化水平越高,SFA含量越高,单不饱和脂肪酸(MUFA)与多不饱和脂肪酸(PUFA)含量越低;脂肪酸组成特征能反映浮游植物物种组成,DHA与蓝藻呈显著负相关(R=-0.87,P<0.05,n=6),DHA含量越高的水体蓝藻含量越低;部分PUFA含量与蓝藻含量呈显著正相关(R=0.89,P<0.05,n=6)。We investigated the fatty acid composition of phytoplankton and affecting factors with samples collected from three sites in Hongfeng Reservoir,Guiyang.Cyanobacteria dominated the phytoplankton group.Saturated fatty acids(SFA)dominated total fatty acid contents,with low contents of docosahexaenoic acid(DHA)and eicosapentaenoic acid(EPA).With increasing eutrophication level,the contents of SFA increased,and the contents of monounsaturated fatty acids(MUFA)and polyunsaturated fatty acids(PUFA)decreased.The composition of fatty acids can be used as indicator of species composition.DHA content was negatively related with cyanobacteria content(R=-0.87,P<0.05,n=6).The content of some PUFAs was positively related with cyanobacteria content(R=0.89,P<0.05,n=6).

关 键 词：脂肪酸 浮游植物 影响因素 红枫水库 

分 类 号：Q948.8[生物学—植物学]