长江口上升流海区的生态环境特征  

CHARACTERISTICS OF THE ECOLOGICAL ENVIRONMENT IN UPWELLING AREA ADJACENT TO THE CHANGJIANG RIVER ESTUARY

作　　者：赵保仁[1] 任广法[1] 曹德明[1] 杨玉玲[1] 

机构地区：[1]中国科学院海洋研究所,青岛266071

出　　处：《海洋与湖沼》2001年第3期327-333,共7页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金!资助项目 ;4 96762 79号 ;国家重点基础研究发展规划项目!;G1 9990 4 3 80 8号

摘　　要：根据 1 985年 8月的调查资料 ,讨论了长江口上升流海区的生态环境特征。研究表明 ,在长江口外 ,大约在 1 2 2°2 0′— 1 2 3°1 0′E、31°0 0′— 32°0 0′N海区存在着明显的下层高盐冷水的抬升现象 ;伴随这种上升运动 ,于 5— 1 0m层 ,在上述高盐冷水区明显地存在一个低溶解氧、高营养盐区。资料表明 ,该低氧、高营养盐海水不是直接来自表层的长江冲淡水 ,而是来自深底层的变性后的台湾暖流水。分析表明 ,长江口外的浮游植物高值区的分布位置与上升流区基本一致 ,两者比较浮游植物高值区略向东南方向偏移约 1 5— 2 0km。Accoding to the comprehensive investigation data for the Changjiang River Estuary area of August, 1985, the upwelling and its impacts on the ecological environment were analyzed. Outside the Changjiang River Estuary, in the area of 122°20′—123°10′E,31°00′—32°00′N, an upwelling of cold and saline water was present. With this upwelling a low dissolved oxygen and high nutrient water appeared in the same area in the 5—10m layers. The low dissolved oxygen and high nutrient water did not come directly from the Changjiang River diluted water in the upper layer, rather it comes from the modified high saline Taiwan Warm Current Water in the deep and bottom layers. Further, the area with high chlorophyll a centents and high phytoplankton cells was deviated to the southeast about 15—20km from the upwelling centre part. A possible reason for this location deviation may be the upwelling which results in a decrease the water temperature in the upper layer, thus slowing down the phytoplankton growth.

关 键 词：上升流 生态环境 长江口 高营养盐海水 浮游植物 水温 

分 类 号：P734[天文地球—海洋化学]