对虾养殖池塘微藻群落结构的调查与分析

分别于2005年秋、2006年春对广东省湛江市东海岛的对虾集约化养殖池(高位池)、半集约化养殖池(土塘)及其引水渠中水体的微藻群落结构进行调查和分析。结果表明,在所调查的对虾池塘中共检出微藻47种,其中春季检出微藻28种,秋季检出微藻21种。主要优势种是颤藻(Oscillatoria sp.)和啮蚀隐藻(Cryptomonas erosa Ehr.)。微藻的多样性指数(H′)平均值为春季东南土塘2.29,东南高位池1.42,东山土塘1.12;秋季东南高位池2.14,东山土塘1.62,而2季节引水渠则处于0.92~3.72之间。对虾池塘微藻平均密度秋季高于春季。

Investigation and analysis on characteristics of microalgae community in prawn ponds

Based on the analysis of the microalgae samples collected from intensive higher-place prawn,semi-intensive earthen ponds and their intake canal in Zhanjiang,China in October 2005 and April 2006,a preliminary study was carried out on the microalgae community.The results showed that a total of 47 species of microalgae was identified in the culture ponds and intake canal,28 species identified in spring and 21 species in autumn.The dominant species were Oscillatoria sp.and Cryptomonas erosa Ehr.The average variations of diversity(H')were 2.29,1.42 and 1.12 in Dongnan semi-intensive earthen ponds,Dongnan intensive higher-place ponds and Dongshan semi-intensive earthen ponds respectively in spring,2.14 in intensive higher-place ponds and 1.62 in Dongshan semi-intensive earthen ponds in autumn,and it varied from 0.92 to 3.73 in the intake canal in the two season samplings.Average consistency of microalgae in autumn was higher than that of ponds in spring.