人工打捞对铜绿微囊藻生长影响的模拟试验  

Effect of Scooping out Blue Algae on Growth of Microcystis aeruginosa

作　　者：周贝贝[1] 王国祥[1] 杨飞[1] 夏明芳 

机构地区：[1]南京师范大学地理科学学院/江苏省环境演变及生态建设重点实验室,江苏南京210046 [2]江苏省太湖水污染防治办公室,江苏南京210024

出　　处：《生态与农村环境学报》2012年第3期260-265,共6页Journal of Ecology and Rural Environment

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07101-013-02);江苏省太湖治理科研课题(TH2010303)

摘　　要：采用一次性培养的方式,在铜绿微囊藻(Microcystis aeruginosa)生长的对数期和稳定期进行人工打捞模拟试验,通过测定培养液中藻细胞密度,研究人工打捞对铜绿微囊藻生长的影响。结果表明:不同生长阶段的人工打捞对铜绿微囊藻的后续生长影响差异很大;在对数期进行人工打捞,铜绿微囊藻仍可以较好地生长,并且随着打捞强度的加大,微囊藻进入指数生长期的时间延长,所达到的种群最大密度呈升高趋势;而在稳定期进行人工打捞,铜绿微囊藻很快就进入稳定期,抑制了其后续生长。藻体内丙二醛(MDA)积累量和超氧化物歧化酶(SOD)活性测定结果表明,人工打捞消除了微囊藻生长过程中的密度制约,延缓了藻细胞的衰老。Effect of scooping blue algae out ot the culture solution ot Mterocystts aerugtnosa at its logarithmic phase and sta- tionary phase on growth of Microcystis aeruginosa was investigated through measuring cell density of Microcystis aeruginosa cultured indoors using the once-for-all culturing method. Results show that the scooping at different growth stages rendered significantly different impacts on subsequent growth of Microcystis aeruginosa. When scooping was done at the logarithmic phase, Microcystis aeruginosa could go on growing well. Intensive scooping would prolong Microcystis aeruginosa＇s logarith- mic growth period with the maximum population density displaying a rising trend. And when scooping was done at the sta- tionary stage, Microcystis aeruginosa would quickly restore its stationary stage, thus inhibiting its subsequent growth, Meas- urement of MDA accumulation and SOD activity of the algae indicates that scooping of blue algae eliminates the density-relat- ed restraint on growth of Microcystis aeruginosa during its growing period, and delays aging of the algae.

关 键 词：水华 控制 蓝藻 打捞 铜绿微囊藻 生长 

分 类 号：Q948[生物学—植物学]