中文摘要：

在实验室条件下,对铜绿微囊（Microcystis aeruginosa）和四尾栅藻（Scendesmus quadricauda）分别在温度22℃、26℃和30℃下进行了纯培养和混合培养,实验结果显示温度对两种藻类的生长和竞争都有显著影响。微囊藻在22℃、26℃和30℃纯培养下的最大生物量及平均特定增长率（μ）分别为444、1180和998（×104cells/mL）及0.33、0.38和0.37/d,说明微囊藻在26℃和30℃下生长较好;混合培养下的最大生物量及平均特定增长率分别为270、778和647（×104cells/mL）及0.34、0.43和0.46/d,显示微囊藻在混合培养下受到了栅藻一定程度的竞争抑制。栅藻在22℃、26℃和30℃纯培养下的最大生物量及平均特定增长率分别为830、984和464（×104cells/mL）及0.36、0.34和0.32/d;混合培养下的最大生物及平均特定增长率分别为538、554和387（×104cells/mL）及0.43、0.40和0.39/d,说明栅藻在温度22℃、26℃下生长较好,混合培养下栅藻的生长受微囊藻影响较大。各温度下两种藻类的生长都可以用Logistic方程拟合。微囊藻对栅藻的抑制参数α分别为1.68（22℃）、0.65（26℃）和0.76（30℃）,而栅藻对微囊藻的抑制参数β依次为0.43（22℃）、0.51（26℃）和0.25（30℃）,三个温度下α均大于β,产生这一结果的原因可能是由于微囊藻与栅藻在竞争过程中不仅表现为资源竞争,同时还存在着明显的他感作用,且可推测微囊藻对栅藻的他感作用大于栅藻对微囊藻的,且在22℃时为最大。

英文摘要：

Uni-culture and co-culture experiments of Microcystis aeruginosa and Scenedesmus quadricauda were carried our at temperatures of 22℃,26℃ and 30℃ under controlled laboratory conditions to explore the effect of temperature on growth and competition of these two algal species.Growth and competition characteristics of M.aeruginosa and S.quadricauda were investigated by calculating their logistic equation and competition parameters with Lotka-Volterra model.The results showed that the effects of temperature on growth and competition of two algae were significant;the maximum biomass and average specific growth rates of M.aeruginosa at 22℃,26℃ and 30℃ in uni-cultures were 444,1180,998（×104 cells/mL）and 0.33,0.38,0.37,respectively,the maximum biomass of M.aeruginosa at 26℃ was higher than that at 30℃ significantly（p〈0.05）,and the maximum of biomass of M.aeruginosa at 30℃ was significantly higher than that at 22℃（p〈0.05）,which indicating that M.aeruginosa grew better at higher temperatures than at lower temperatures within the temperature range tested.The maximum biomass and average specific growth rates of M.aeruginosa at 22,26 and 30℃ in co-culture were 270,778,647（×104 cells/mL）and 0.34,0.43,0.46,respectively.Each maximum biomass of M.aeruginosa at 22℃,26℃ or 30℃ in co-culture was significantly lower than that at corresponding temperatures in uni-culture（p〈0.05）,suggesting that the growth of M.aeruginosa was inhibited by S.quadricauda in co-culture.The maximum biomass of S.quadricauda at 22℃ and 26℃ were 830 and 984（×104 cells/mL）,which were significantly higher than that at 30℃（464×104 cells/mL）（p〈0.05）;the average specific growth rates of S.quadricauda at 22℃,26℃ and 30℃ in uni-cultures were 0.36,0.34,0.32,respectively;in co-culuture conditions,we obtained the lowest maximum biomass（387×104 cells/mL） of S.quadricauda at 30℃ which was significantly lower than those at 22℃ and 26℃（p〈0.05）;the average specific growth rat