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澜沧江源区浮游植物群落特征及其对水质的指示作用
引用本文:朱海涛,湛若云,彭 玉,柴元冰,陆 丹,闵 敏,贾 洁,周明春,王英才.澜沧江源区浮游植物群落特征及其对水质的指示作用[J].水生态学杂志,2020,41(1):16-21.
作者姓名:朱海涛  湛若云  彭 玉  柴元冰  陆 丹  闵 敏  贾 洁  周明春  王英才
作者单位:青海省水文水资源勘测局,南水北调中线水源有限责任公司,长江流域水环境监测中心,青海省水文水资源勘测局,青海省水文水资源勘测局,青海省水文水资源勘测局,青海省水文水资源勘测局,长江流域水环境监测中心,长江流域水环境监测中心
基金项目:青海省水资源费专项资金项目“青海省三江源地区重点湖泊河段水生态调查”。
摘    要:为探究澜沧江源区水生态概况,于2016年夏季(7月)和秋季(9月)对澜沧江源区干流及其支流浮游植物进行了调查。研究结果表明:① 记录浮游植物7门47种,其中硅藻(21种)和绿藻(14种)为主要成分,分别占总种类数的45%、30%;时空差异明显,夏季高于秋季,支流高于干流;优势种以硅藻为主,其中针杆藻(Synedra sp.)为两季度绝对优势种。② 密度介于5.4×104 cells/L到2.3×106 cells/L之间,平均密度为7.9×105cells/L,硅藻贡献最大;时空差异明显,秋季高于夏季,支流高于干流。③ 与中、下游比较,上游夏季藻类多样性和密度均低。④ 浮游植物密度、Shanon-Wiener多样性指数和Pielou均匀度指数分析显示澜沧江源区水质介于极贫营养到中营养之间,处于轻度污染到无污染状态,水生态状况整体优良。

关 键 词:澜沧江源  浮游植物  密度  多样性指数  水质评价
收稿时间:2019/2/22 0:00:00
修稿时间:2019/12/27 0:00:00

Phytoplankton Structure and Water Quality Assessment in the Source Region of Lancang River
ZHU Hai-tao,ZHAN Ruo-yun,PENG Yu,CHAI Yuan-bing,LU Dan,MIN Min,JIA Jie,ZHOU Ming-chu and WANG Ying-cai.Phytoplankton Structure and Water Quality Assessment in the Source Region of Lancang River[J].Journal of Hydroecology,2020,41(1):16-21.
Authors:ZHU Hai-tao  ZHAN Ruo-yun  PENG Yu  CHAI Yuan-bing  LU Dan  MIN Min  JIA Jie  ZHOU Ming-chu and WANG Ying-cai
Abstract:In order to understand the general situation of hydroecology in the source region of the Lancang River, an investigation of phytoplankton was carried out here in July (Summer) and October (Autumn) 2016. A total of 47 species of phytoplankton were identified, belonging to7 phylum. The main taxa were Bacillariophyta (21 species) and Chlorophyta (14 species), which accounted for 45% and 30% of the total number respectively. The dominant species were mostly diatoms, and Synedra sp. aculeate was the most abundant one. Species number in Summer was higher than in Autumn, and species number in branch river was higher than in main river. Cell density of phytoplankton was 5.4×104 cells/L~2.3×106 cells/L, and the mean density was 7.9×105 cells/L. Diatom contributed the most in cell density. Cell density in Summer was lower than in Autumn, and cell density in branch river was higher than in main river. Compared with the middle and lower reaches of the Lancang River, the diversity and density of algae in the upper reaches were low. Cell density, Shannon-Wiener biodiversity index and Pielou evenness index of phytoplankton indicated that the water quality in source region of the Lancang River were good, which was in extremely poor nutrition level or the poor nutrition level.
Keywords:the source region of the Lancang River  phytoplankton  biodiversity  cell density  water quality assessment
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