2000～2002年柘林湾浮游枝角类的生态特征

Ecological character of planktonic Cladocerain Zhelin Bay during 2000～2002

2 0 0 0年 7月～ 2 0 0 2年 7月的调查结果表明 ,广东柘林湾浮游枝角类有 3种 ,隶属于 2科 3属 .其中 ,鸟喙尖头氵蚤(Peniliaavirostris)为全年优势种 ,合计占浮游动物总个体数的 9.0 8%和枝角类总个体数的 91 .84 % .该湾浮游枝角类的密集区位于黄冈河、河口区域及湾外水域 ,其数量与盐度呈显著负相关关系 .浮游枝角类的季节变化极为显著 ,表现为夏、秋多 ,冬、春少的基本格局 。

Planktonic Cladocera in Zhelin Bay and its adjacent area was surveyed from July 2000 to July 2002. Three species belonging to three genera of two families were found. Penilia avirostris dominated annually, accounting for 92% of the total planktonic cladoceran and 9% of the total zooplankton biomass. Most planktonic cladoceran crowded around the outer bay, Huangganghe River and its estuary. The biomass of planktonic cladoceran was significantly negatively correlated with water salinity. Total number of planktonic cladoceran showed a significant seasonal variation, with high abundance in summer and autumn and low abundance in winter and spring, which was significantly related to water temperature.