温度和光照对铜绿微囊藻生长的影响
2011-09-29张青田王新华胡桂坤
张青田,王新华,林 超,胡桂坤
(1. 天津市海洋资源与化学重点实验室,天津科技大学海洋科学与工程学院,天津 300457;2. 南开大学生命科学学院,天津 300071;3. 海河流域水资源保护局,天津300170)
温度和光照对铜绿微囊藻生长的影响
张青田1,2,王新华2,林 超3,胡桂坤1
(1. 天津市海洋资源与化学重点实验室,天津科技大学海洋科学与工程学院,天津 300457;2. 南开大学生命科学学院,天津 300071;3. 海河流域水资源保护局,天津300170)
铜绿微囊藻(M icrocystis aeruginosa)是常见的水华蓝藻,对湖泊和水库的环境造成恶劣影响.在室内研究了温度和光照度对铜绿微囊藻生长的影响,以期为水华的监测和分析提供数据支持.研究结果表明:铜绿微囊藻喜好高温,在水温30~35,℃时生长最佳,在水温30,℃时获得最大细胞密度;而水温低于20,℃时生长缓慢.铜绿微囊藻对光照度要求不高,较低光照度即可快速增长,光照度2,000~6,000,lx适宜铜绿微囊藻快速增殖,在4,000,lx时生长最快.
温度;光照;铜绿微囊藻;生长
Abstract:The Microcystis aeruginosa is one of the harm ful Cyanobacteria species causing abom inable environmental conditions of lakes and reservoirs. Effects of water temperature and illumination on the cell proliferation of this microalgal species were done in the laboratory in order to help the monitoring and analysis of water blooms. The results showed:the m icroalga preferred higher water temperature and the optimal temperature for M.aeruginosa to grow was 30-35,℃,and the highest cell density was obtained in 30,℃ condition. On the other hand,this m icroalga grew very slow ly when the water temperature was less than 20,℃. This microalga did not request higher illumination,and grew best in 4,000 lx condition. The optimal illum ination for its proliferation is about 2,000-6,000 lx.
Keywords:temperature;illumination;Microcystis aeruginosa;proliferation
近10年来,水华不仅在我国南方的水库、湖泊经常爆发[1],北方水域也时有发生,给生产和经济带来损失.引起湖泊、水库水华的优势藻种经常包括微囊藻,其中以铜绿微囊藻(Microcystis aeruginosa)造成的灾害尤甚,成为中国乃至世界的研究热点之一[2–3].通常认为长期的微藻演替依赖高营养盐浓度,而水华季节演替则主要依赖温度、光照等物理条件[4–5].
温度是影响生物生长发育的重要因子,对水生微藻也不例外.目前,人们已经把温度作为监测和预报水华的一个关键因素.在低……
