对虾养殖围隔生态系浮游细菌的数量动态

摘要

Numerical dynamics of bacterioplankton in 5 shrimp cu ltural enclosure ecosystems were studied.The results were that the number of bac terioplankton fluctuated between 0.41×106 ml-1 and 10.63×106 ml- 1 with an average of (4.29±2.44)×106 ml-1, and increased gradually w ith the lapse of cultural time.Bacterioplankton exhibited an obvious diurnal num erical fluctuation. Bacterioplankton numbers were correlated positively with wa ter temperature,total chemical oxygen demand (TCOD) and dissolved oxygen demand (DCOD), but was not correlated significantly with particulate oxygen demand(PCOD ), zooplankton and phytoplankton biomasses.%对5个对虾养殖围隔生态系浮游细菌的数量动态进行了研究.结果表明:浮游细菌数量波动在(0.41～10.63)×106 ml-1之间,平均为(4.29±2. 44) ×106 ml-1.随着养殖时间的推移,细菌数量逐渐上升,细菌数量昼夜间呈现较大波动.细菌数量与水温、总有机质的化学需氧量(TCOD)、溶解态有机质的化学需氧量(D COD)呈现显著正相关,与颗粒态有机质的化学需氧量(PCOD)、浮游动、植物生物量无显著相关性.