涠洲岛珊瑚礁生态系中浮游动植物与环境因子关系的初步探讨

PRELIMINORY STUDY OF THE RELATIONSHIP BETWEEN PLANKTON AND ENVIRONMENTAL FACTORS IN THE CORAL REEF SYSTEM AROUND WEIZHOU ISLAND

本文根据1990年4月、10月间的理化分析数据,结合2002年9月涠洲岛珊瑚礁生态环境的调查状况,首次从珊瑚礁生态系的角度初步探讨该岛区浮游动植物与环境因子的关系。结果表明:该岛区浮游动植物的分布具有明显的区域性和季节性,既体现了珊瑚礁生态系具有较高的初级生产力特征,也体现了浮游动植物具有显著的季节交替现象。相关分析显示,水温、盐度、N,P,Si营养盐对浮游植物的种类组成及数量变动均有明显影响,但对浮游动物的影响不大;N是该生态系中浮游植物的限制因子,P限制状况只有在珊瑚礁生长带较深的海域出现,Si呈相对富足状态。

Based on the data for physical and chemical factors analysed, in April and October 1990, combined with the investigation data for the coral reef eclolgical environment of the waters around Weizhou Island obtained in September 2002, the relationship between the plankton and the environmental factors in this island area was studied from the angle of coral reef ecosystem for the first time. The results showed that the distribution of plankton possessed obvious regional and seasonl characters, reflecting both the higher primary productivity of the coral reef ecosystem and the seasonal variations in the plankton in this area. Correlation analysis indicates that while water temperature, salinity, nutrients, N, P, and Si all have an obvious influence on the plant plankton in their composition and quantity variations, they have little influence of the zooplankton; N is the restrictive factor for plant plankton in this ecosystem, P is restrictive only in the deeper waters with coral reef growth zones, Si is relatively abundant.