铜绿微囊藻和普通小球藻在不同pH下生长特性及竞争参数计算  

Growth and competitiveness of Microcystis aeruginosa and Chlorella vulgaris at varying pH

作　　者：薛凌展[1] 黄种持[1] 林泽[2] 黄柳婷[1] 林学文[1] 吴妹英[1] 

机构地区：[1]福建省淡水水产研究所,福建福州350002 [2]福建师范大学生命科学学院,福建福州350108

出　　处：《福建农业学报》2010年第2期142-148,共7页Fujian Journal of Agricultural Sciences

基　　金：农业部公益性行业(农业)科研专项经费项目(nyhyzx07-043-12);福建省属公益类科研院所基本科研专项(2009R10012-2)

摘　　要：对铜绿微囊藻(Microcystis aeruginosa)和普通小球藻(Chlorella vulgaris)分别在pH5、6、7、8、9、10、11下进行纯培养和混合培养试验,应用logistic种群增长模型和Lotka-Volterra竞争模式进行参数计算,结果显示pH对2株藻的生长及竞争关系都有显著的影响,铜绿微囊藻pH在8～11范围内生长良好,其最佳生长pH值为9,而普通小球藻则pH在7～9之间生长较好,其最佳pH值为8。共同培养的试验结果显示碱性环境中铜绿微囊藻的竞争优势强于普通小球藻,pH为8～10时β值大于α值,而pH=7时普通小球藻占优势,α值大于β值。Uni-culture and co-culture experiments on Microcystis aeruginosa and Chlorella vulgaris were carried out at pH=5,6,7,8,9,10 and 11 under controlled laboratory conditions.The effects of pH on growth and competitiveness of these two algal species were studied.The growth and competing characteristics of M.aeruginosa and C.vulgaris were analyzed using the logistic equation and the Lotka-Volterra model. The results showed that the effects of pH on growth and competitiveness of the two algae were significant; M.aeruginosa grew better when pH=8-11,with an optimal pH of 9; and C.vulgaris grew quickly when pH=7-9,with an optimal pH of 8. In the co-culture experiments,M.aeruginosa had a competitive edge over C.vulgaris,with a β value higher than α at pH=8,9 or 10. However,at pH=7,C.vulgaris gained the upper-hand,with the α value higher than β.

关 键 词：铜绿微囊藻 普通小球藻 PH 生长特性 竞争参数 

分 类 号：Q143.1[生物学—生态学]