漓江水系底栖硅藻的水质评价  

Water Quality Bioassessment with Benthic Diatom in Lijiang River,Guilin,China

作　　者：周景[1] 刘朔孺[1] 蔡德所[2,3] 张永祥[2,4] 王备新[1] 

机构地区：[1]南京农业大学昆虫学系水生昆虫与溪流生态实验室,江苏南京210095 [2]广西大学土木建筑工程学院,广西南宁530004 [3]三峡大学水利与环境学院,湖北宜昌443002 [4]广西水利电力勘测设计研究院,广西南宁530023

出　　处：《广西师范大学学报（自然科学版）》2012年第4期123-129,共7页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(40971280;30870345);中央分成水资源费资助项目(2010-2011);广西水利电力勘测设计研究院重点科技项目基金资助项目(20100013)

摘　　要：以漓江中上游为示范流域,研究硅藻的Shannon、Simpson、Marglef、TDI和PTI指数与我国现有河流物化监测的相关性,并对漓江生态健康状况进行评估。从种群结构上分析,有5个位点以Achnanthes minutissima为优势种,指示较为清洁的水体。理化指标(TP、NH4-N)显示所调查的漓江区域基本为Ⅲ级及Ⅲ级以上水体,与Simpson指数的评价结果趋于一致。在Spearman相关性分析中,物种数(r=0.677,p=0.032)、Margalef(r=0.733,p=0.016)、TDI指数(r=0.687,p=0.028)与电导率显著正相关,PTI指数(r=-0.685,p=0.029)与电导率显著负相关。样点硅藻数量(r=-0.839,p=0.002)与Mg2+显著负相关。Margalef指数(r=0.638,p=0.047)与Ca2+显著相关。TDI指数与亚硝酸(r=0.670,p=0.034)显著正相关。结果表明,TDI和PTI指数是潜在的评价漓江水体生物学质量的硅藻指数。Taking Lijiang river as a demonstration basin,the correlation among Shannon,Simpson,Marglef,TDI,PTI index and the physicochemical monitoring results of the rivers are studied,then the Lijiang river ecological health status. From the population structure analysis,achnanthes minutissima was the dominant species in five sites,indicating a relatively clean water. The physical and chemical indicators （TP and NH4-N） show that the water in surveyed region in Lijiang were nearly above ClassⅢ（including Class Ⅲ ）, and the results of Simpson index evaluation are similar. Through Spearman correlation analysis,the electrical conductivity （Cond） showed a significant correlation with the number of species （r=0.677 ,p=0. 032）,while the Margalef （r=0. 733,p=0. 016） and the TDI index （r=0. 687 ,p= 0. 028） showed a negative correlation with PTI （r=-0. 685 ,p=0. 029）. Mg^2＋ and the total number of individuals in the samples （N） （r=-0. 839 ,p=0. 002） were highly significantly correlated. Ca^2＋ and Margalef index （r=0. 638 ,p=0. 047） was significantly correlated. TDI index and nitrite （r=0. 670 ,p =0. 034） was significantly correlated. The results show that TDI,PTI index can indicate the water conditions.

关 键 词：漓江 硅藻 生物指数 水质评价 

分 类 号：X823[环境科学与工程—环境工程]