摘要
通过Smith生态位宽度指数和Pianka生态位重叠指数分析了虾池常见微藻种群(啮蚀隐藻、新月菱形藻、微绿球藻和蛋白核小球藻)在光照强度、温度和盐度资源上的生态位宽度和生态位重叠特征。结果表明:新月菱形藻和蛋白核小球藻具有较大的生态位宽度值,啮蚀隐藻和微绿球藻的生态位宽度值则相对较小。蛋白核小球藻和微绿球藻在光照强度、温度和盐度资源上的生态位重叠值均为最大,啮蚀隐藻在各资源与其他微藻的重叠值最小。新月菱形藻与蛋白核小球藻适应光照强度的范围较广。当水温达16.9℃,可定向培育新月菱形藻;当水温达25℃,可定向培育新月菱形藻和啮蚀隐藻;当水温达30℃时,可定向培育新月菱形藻、蛋白核小球藻和微绿球藻。养殖水体盐度处于9～26,可引入蛋白核小球藻与微绿球藻;处于9～17.5,应引入啮蚀隐藻;高盐水体,应引入新月菱形藻。蛋白核小球藻和微绿球藻在光照强度、温度和盐度资源上的生态位重叠值均为最大,因此微藻定向培育,不可同时引入蛋白核小球藻与微绿球藻。
By using Smith＇ s and Pianka＇ s indices, this paper studied the niche breadths and overlaps of four common microalgae populations in shrimp ponds along gradients of light intensity, temperature and salinity. The results showed that the niche breadth of Nitzschia closterium and Chlorella pyrenoidosa was higher than that of Cryptomonas erosa and Nannichloropsis oculata. N. oculata and C. pyrenoidosa had the highest niche overlap in all different resources dimensions, but C. erosa appeared with the lowest niche overlap, compared to other microalgae in all the different resources dimensions. Nitzschia closterium and Chlorella pyrenoidosa grew well in wide range of light intensity. When the temperature reached 16. 9 ℃ and 25 ℃, N. closterium and C. erosa would be breeding in the ponds, respectively. When the temperature reached 30℃, N. closterium, N. oculata and C. pyrenoidosa were suitable for breeding. N. oculata and C. pyrenoidosa were suitable for breeding in the ponds with a salinity ranging from 9 to 26, Cryptornonas erosa was suitable with the salinity ranging from 9 to 17.5, while Nitzschia closterium was better with higher salinity. N. oculata and C. pyrenoidosa would not be breeding at the same time in the same ponds, because they have the highest overlap in all resources dimensions.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第3期397-400,共4页
Chinese Journal of Ecology
基金
中央级公益性科研院所基本科研业务费专项资金项目(2007ZD01)
广东省自然科学基金(5003485)
广东省科技计划项目(2006B20601009)
国家十一五科技支撑计划(2006BAD09A11)
珠海市科技资助项目(PC20061056)
关键词
微藻
生态位
光照强度
温度
盐度
microalgae
niche
light intensity
temperature
salinity.
