摘要
为揭示内蒙古典型湖泊浮游植物群落特征及其对营养状态的响应,于2019年和2020年7月对呼伦湖,岱海,乌梁素海和居延海浮游植物和水质理化指标进行取样调查.结果显示,呼伦湖,岱海,乌梁素海和居延海分别鉴定出浮游植物101种,44种,125种和42种,绿藻门,硅藻门和蓝藻门是其优势门类.调查期间4个湖泊浮游植物的总丰度分别为5.71×10^(5),0.18×10^(5),3.45×10^(5)和6.96×10^(5)cells/L;根据优势度分析,居延海优势种最少为6种,其他湖泊优势种都在10种以上;CCA分析表明,综合营养指数(TLI),水温(T),总溶解性固体(TDS),氨氮(NH4+-N),盐度(SAL),pH值(P<0.01)是浮游植物优势种的主要影响因子.4个湖泊的浮游植物Shannon-Wiener多样性指数(H′),丰富度(D),均匀度(J)指数均值分别为1.4,0.38和2.79(呼伦湖),2.28,0.87和1.42(岱海),2.99,0.74和4.46(乌梁素海),2.39,0.75和0.75(居延海),其对应评价结果分别为中富/中/中营养,中/中富/贫营养,中/贫中/贫营养,中/中/贫营养;综合营养指数(TLI)评价结果依次为重度富营养、中度富营养、轻度富营养和中度富营养.3种多样性指数的评价结果存在不同,整体上浮游植物指数评价结果显著低于理化指标的评价结果,这是由于3种多样性指数不仅仅受TLI相关指标TP,TN,SD和Chl.a的影响,T,pH值,SAL和TDS都与其显著相关,其中J与上述指标都显著相关,而H′与TLI相关指标关系显著,D与T,pH值,SAL和TDS关系显著.因此,单独的采用多样性等生物评价可能并不适用于内蒙古高原湖泊,建议结合理化指标使用多种评价方式进行综合评价.
To reveal the characteristics of phytoplankton community structure and their response to nutrient,phytoplankton and physicochemical indexes of water quality in Lake Hulun,Daihai,Ulansuhai and Juyanhai were sampled and investigated in July 2019 and July 2020.101,44,125 and 42 phytoplankton species were identified in Lake Hulun,Daihai,Ulansuhai and Juyanhai with a total phytoplankton abundance of 5.71×10^(5),0.18×10^(5),3.45×10^(5) and 6.96×10^(5) cells/L,respectively.Chlorophyta,Diatoms and Cyanobacteria were the dominant phyla.However,only 6 dominant species were identified in Juyanhai,which was the least compared with more than 10 dominant species in the three other lakes.The dominant species of phytoplankton were mainly impacted by TLI,T,TDS,NH4+-N,SAL and pH(P<0.01).The mean values of phytoplankton Shannon-Wiener diversity(H′),richness(D)and evenness(J)were 1.4,0.38 and 2.79 in Hulun Lake,2.28,0.87 and 1.42 in Daihai,2.99,0.74 and 4.46 in Ulansuhai,2.39,0.75 and 0.75 in Juyanhai,which indicated the corresponding evaluation results were medium rich/medium/medium nutrition,medium/medium rich/poor nutrition,medium/poor medium/poor nutrition,medium/moderate/poor nutrition,respectively.However the evaluation results of the comprehensive nutrition index(TLI)were severe eutrophication,moderate eutrophication,mild eutrophication and moderate eutrophication,respectively.Obviously,the evaluation results of the three approaches were different.On the whole,the evaluation result of phytoplankton index was significantly lower than that of physical and chemical indicators.This might be because the three diversity indexes were not only affected by the comprehensive nutrition indexes like TP,TN,SD and Chl.a,but also significantly correlated with T,p H,SAL and TDS.The analyzed results showed that J was significantly correlated with all the indexes,while H′was significantly correlated with the indexes that were related to the comprehensive nutritional indexes and D was significantly correlated with T,pH,SAL and TDS.There
作者
王世欢
张生
武蓉
史小红
赵胜男
孙标
WANG Shi-huan;ZHANG Sheng;WU Rong;SHI Xiao-hong;ZHAO Sheng-nan;SUN Biao(IMAR Key Laboratory of Water Resources Protection and Utilization,Inner Mongolia Agricultural University,Hohhot 010018,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2023年第1期311-320,共10页
China Environmental Science
基金
国家重点研发计划项目(2017YFE0114800,2019YFC0409204)
国家自然科学基金资助项目(51869020,52060022,51909123)。
关键词
寒旱地区
浮游植物
群落结构
湖泊
营养状态
cold and arid regions
phytoplankton
community structure
lake
nutritional status
