农业环境科学学报2011，Vol.30Issue(3)：539-547,9.
太湖南泉水域水体及水华蓝藻中常量元素Ca Na Mg K和Al的特征和变化
Characteristics an Variation of Major Element Ca, Na, Mg, K, Al in Waters an Water-bloom-forming Cyanobacteria in Nanquan Area of the Taihu Lake, China
摘要
Abstract
The Taihu Lake is the thir largest freshwater lake in China. Recently, heavy cyanobacterial blooms, being dominated by microcystis, have broken out frequently in this lake every year, and therefore, become a serious environmental problem.ln the present work, a yearround study was conducted to investigate the variations of the community composition of waterbloom-forming cyanobacteria, the concentrations of major element Ca, Na, Mg, K, Al in the cyanobacteria and ambient water, and the changes in water temperature and pH at Nanquan area of the Taihu Lake from March 2008 to February 2009. Results showed that the most intense waterbloom happened from May to October during the study period with the water temperature maintained above 20 ℃ and the pH increased distinctly in October. The concentrations of the major elements in water samples were follow the order Na＞Ca＞Mg＞K＞A1, and those in cyanobacterial samples were Ca＞K＞Mg＞Na＞Al.The calculated bioaccumulation factors of cyanobacteria were in the following order Al ＞K ＞Mg＞Ca ＞Na. The concentration of Na in the cyanobacterial samples was even lower than that in water samples. In addition, the highest bioaccumulation factor was documented for Al in water-bloom cyanobacteria, which was as high as 19 194 in July. The results of the present study could serve as fundamental insights for further investigation on the functional significance of these element to the occurrence and development of cyanobacterial water blooms,and furthermore, provided important evidence for the potential apporach of water-bloom control by removing major element burden. This study also suggested that water-bloom-forming cyanobacteria could be used as an important “bio-mine” resource, due to its huge amount of biomass and extreme accumulation of these major elements.关键词
太湖/常量元素/蓝藻/富集Key words
Taihu Lake/ major element/ cyanobacteria/ bioaccumulation分类
资源环境引用本文复制引用
苏彦平,杨健,刘洪波..太湖南泉水域水体及水华蓝藻中常量元素Ca Na Mg K和Al的特征和变化[J].农业环境科学学报,2011,30(3):539-547,9.基金项目
中央级公益性科研院所基本科研业务费专项(2009JBFB12) （2009JBFB12）
