2008-2010年洱海水质及藻类初步分析

根据2008～2010年洱海水质和藻种监测数据,得出洱海水质现状及藻类的变化状况。监测结果表明:近3年洱海水质总体呈好转趋势,三个监测站点水质好转表现为海东>才村>团山;总藻细胞密度则恰恰相反,其大小为团山>才村>海东。藻类种属方面,洱海共检出8门61属;蓝藻、绿藻门数目占总数的80%以上,其次为硅藻,约10%左右,洱海的藻类植物群落组成主要为蓝藻-绿藻-硅藻类型。此外,2010年以前三个监测点以蓝藻居多,2010年后绿藻及硅藻比重跃增,其他藻种出现频率升高,导致洱海藻类浮游植物群落组成有所变化,洱海藻类丰度提高,其原因可能与2010年云南气候的反常引发环境变化造成。

Study of Water Quality and Algae in Erhai Lake during 2008-2010

Abstract： Based on the monitoring data of water quality and algae species in the Erhai Lake from 2008 to 2009, the changes in water quality and algae were derived. The results showed that the water quality improved in past 3 years and the improvement order in the three monitoring stations was Haidong〉 Chaicun〉 Tuanshan; the size of total cell density, by contrast, was Tuanshan〉 Chaicun〉 Haidong. There were 61 genera and 8 phyla of algae species and the proportion of cyanobacteria and Chlorophyta number was more than 80% of the total number, followed by diatoms which was about 10% in Erhai Lake. The main communities composed of algae were cyanobacteria - chlorophyta - diatom types. In addition, cyanobacteria occupied the majority in three monitoring stations before 2010; however, the proportion of green algae and diatoms jumped after 2010 and lead to the variations of algae phytoplankton community composition in Erhai Lake, raising abundance of algae in Erhai Lake. The reason may be related to abnormal weather in Yunnan in 2010 which caused environment chance.