生态环境学报2016，Vol.25Issue(4)：656-663,8.DOI:10.16258/j.cnki.1674-5906.2016.04.015
藻华聚集的环境效应：对凤眼莲生态学性状的影响
Environmental Effects of Algae Blooms Cluster：The Impact on Ecology Character of theEichhornia crassipes
摘要
Abstract
Eutrophication phenomenon in rivers, lakes and other water bodies in our county is becoming more and more serious as excessive nutrients (mainly nitrogen and phosphorus) accumulated during the last 30 years as the effects of excessive fertilizer using, industry and domestic sewage direct discharge, and agricultural runoff, etc. algae bloom (commonly known as cyanobacterial bloom, or blue-green algae bloom) is breaking out period in these water bodies with the deterioration of water quality ,and it has bad impact to the water ecological environment, local residents’ life, social production activities. The planting the aquatic plants in situ, among a variety of governance measures of algae blooms and purification of contaminated water, has the advantage of ecological, environmental protection and low cost as being the better choice. However, it need for further study how affect the plant’s ecological traits after the algae blooms accumulated in the root district of aquatic plants. So it is help to reveal the deep mechanism of aquatic plant die through studying the influence on the changes of biological and ecological index caused by the algae bloom large-scale gathered, and also to benefit to better play the role of the purification of polluted water of aquatic plants. In this study, the changes of ecology character ofEichhornia crassipesand its biological and ecological response were studied with the different concentration of algae cells gathered by the simulation experiment. Results showed that the dissolved oxygen would be exhausted in 2h after algae cells gathered, and the Eh decreased to -200 mV, the water environment became the anaerobic and reductive and formed the environmental stress to theEichhorniacrassipes. The concentration of Nitrogen, Phosphorus, dissolved sugar in plant leaf and root increased, however, the concentration of K+ in plant decreased quickly during the experiment, after the algae cells aggregated, it showed that the aquatic plant came into being the response to the stress environment. The root vigor of treatment group 1 continued to increase, but the treatment group 2 quickly rose to 0.68μg·g-1·h-1 during the 3 d, and then decreased to 0.14μg·g-1·h-1 to the end. The root length, plant biomass and root/stem leaf ratio of the plant decreased during the experiment, indicated theEichhornia crassipes had the ecological response to the adversity stress of the algae cells accumulated, which manifested the concentration of root vigor, plant biomass, K+ dropped. So the deterioration of water ecological environment posing the strong stress to the Eichhornia crassipesis the main reason of the die for the death of aquatic plant.关键词
藻华聚集/环境效应/凤眼莲/生态学性状Key words
algae blooms gathered/environment effect/Eichhornia crassipes/ecology character分类
环境科学引用本文复制引用
包先明,何俊,刘国锋..藻华聚集的环境效应：对凤眼莲生态学性状的影响[J].生态环境学报,2016,25(4):656-663,8.基金项目
国家自然科学青年基金项目（41101525）；江苏省自主创新资金（CX(12)5057）；国家重大科技专项巢湖水专项 （12）
