摘要
铜绿微囊藻(Microcystis aeruginosa)作为蓝藻水华的优势种,研究其竞争优势形成的机制,对于科学预测湖泊中蓝藻水华的产生,并采取相应措施减少其带来的影响具有重要意义。综述了铜绿微囊藻优势形成的研究现状和形成机理的一般认识,分析了导致铜绿微囊藻优势形成的化学、物理和生物等主要环境因素,论述了铜绿微囊藻成为水华优势种的可能原因。水华优势种的形成是铜绿微囊藻本身的生理特性与环境中的物理、化学和生物等条件共同作用的结果。在探索水华优势种成因时,不能局限于夏季水华发生时环境特征的研究与观察,而还应该关注藻的越冬生理生态特征及春季复苏的生长过程。
The aim of this paper is to explore the M. aeruginosa- dominating mechanism based on the past and present research ad- vances in the aquatic ecosystem with M. aeruginosa. In our re- search, we attempted to expound the dominant physical, chemical and biological factors that were expected to lead M. aeruginosa to becoming the dominant species in phytoplankton community while dis- cussing the mechanism of its dominance. Furthermore, we also at- tempted to make a contrast analysis of M. aeruginosa with other alga in order to find why it could thrive in the wide range of temperature and light intensity and why it could so efficiently utilize its surround- ing nutrients such as N, P, Fe and CO2. Moreover, M. aeruginosa could move towards the radiant energy-rich or nutrient-rich zones due to vacuole existence. M. aeruginosa could also keep itself away from the prey of zooplankton by colony formation to get rid of all other sur- rounding allelopathy substances to inhibit the growth of other alga. Therefore, we believe that it is these physiological advantages of M. aeruginosa that enables itself to result in its own domlnanee in the aquarium context. We also suggest that the future research should be turned on not only the research of the alga growth period in summer but also on the colony accumulation and settling process to the sedi- ment surface in autumn and recruiting process in spring, because Eutrophication in China＇ s lakes is one of the most serious water-pollution problems both for the present stage and for the near future.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第5期73-77,共5页
Journal of Safety and Environment
基金
国家重点基础研究发展规划项目(2002BC412301)
关键词
环境生态学
铜绿微囊藻
富营养化
蓝藻水华
竞争
机理研究
environmental ecology
Microcystis aeruginosa
eutrophication
cyanobacteria bloom
competition
mechanism research
