摘要
为了研究嘉陵江小三峡硅藻群落结构及水质状况,按枯水期(2006年11月—2007年3月)、平水期(2007年4—6月)和丰水期(2007年7—9月)分别采集6个样点的硅藻样品,分析其物种组成、细胞密度、多样性和均匀度指数及硅藻商等,并结合理化指标对水质进行评价。结果表明:嘉陵江小三峡共有硅藻78种(含变种和变型),隶属2纲、10科、20属;硅藻细胞密度为0.53×104～3.58×104ind.L-1,总平均1.55×104ind.L-1;多样性指数值(H′)为1.62～2.96,总平均2.33;均匀度指数值(E)为0.28～0.56,总平均0.42;嘉陵江小三峡水质总体上属β-中污水体,沙溪、北温泉水质较好,属微污水体,碚石、牛石沱水质次之,为β-中污水体,盐井、毛背沱水质最差,为α-中污水体。
To study the diatom community structure and water quality in Small Three Gorges of Jialing River, diatom samples were collected at six sampling sites in dry season （November 2006 - March 2007 ）, level season （ April - June 2007）, and rainy season （ July - September 2007 ）. The species composition, cell density, diversity, and evenness index were analyzed, and the water quality was evaluated. A total of 78 species belonging to 2 classes, 10 families and 20 genera were recorded. Cell density was 0. 53 × 10^4-3.58 × 10^4 ind · L^-1, with a mean value of 1.55× 10^4 ind · L^-1 ; species diversity index was 1.62-2.96, with a mean value of 2.33; and evenness index was 0. 28-0. 56, with a mean value of 0. 42. On the whole, the water quality of Small Three Gorges belonged to β-mesosaprobie. Shaxi stream and North hot spring had better water quality, belonging to oligosaprobid, followed by Beishi and Niushituo, belonging to β-mesosaprobie, and Yanjing and Maobeituo, belonging to α-mesosaprobic.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第4期648-652,共5页
Chinese Journal of Ecology
基金
重庆市自然科学基金项目(CSTC
2008BB5256)
国家自然科技资源平台资助项目(2005DKA21403)
关键词
嘉陵江
小三峡
硅藻
群落结构
水环境
Jialing River
Small Three Gorges
diatom
community structure
water environment
