南沙群岛海域理化参数垂向分布特征及跃层生态系的提法

Vertical characteristics for the physical and chemical parameters, and a viewpoint of the thermocline ecosystem in the Nansha Islands

自１９８５～１９９９年中国科学院南沙综合科学考察队在南沙群岛进行了１２个航次的综合科学考察．根据调查的结果，通过分析南沙群岛海域理化参数垂向分布特征，得出次表层海水理化参数具有极值现象、跃变现象和波动现象的特点，讨论了这些独特特征反映的独特生境，提出了南沙群岛海域垂直方向上存在跃层生态系的观点．

Based on the investigation information from 12 cruises on the Nansha Islands during 1985 to 1999, obtained by the Multidisciplinary Oceanographic Expedition Team of the Chinese Academy of Sciences for the Nansha Islands, the vertical. characteristics for the physical and chemical parameters are discussed. The phenomenan for the extremes including maximum and minimum, for the mutation, for the wave, and for the physical-chemical and biological parameters in the Nansha Islands are found. The characteristics reflect that a special living environment existed in the subsurface layer of the Nansha Islands, corresponding to the subsurface ecosystem. Therefore, a viewpoint for the existence of thermocline ecosystem in the Nansha Islands is put forward.