摘要
根据1997～2000年东海23°30′～33°N、118°30′～128°E海域4个季节海洋调查资料,运用定量、定性方法,探讨东海浮游十足类(Decapods)总丰度的平面分布、季节变化以及变化的动力学机制.结果表明,浮游十足类总丰度有明显的季节变化,夏季最高为451ind/(100 m3),秋季次之为71ind/(100m3),春季最低为24ind/(100m3).北部近海(29°30′～33°N、123°30′～125°E)水域春季几乎没有分布,除冬季外,总丰度基本呈近海高于外海的分布趋势.中型莹虾(Lucifer intermedius)是影响总丰度变化最主要的种类;夏季与秋季及四季总丰度的变化同水温有非常显著的线性相关关系,与盐度的相关关系不显著;冬季则仅仅与盐度有关,春季则与温度和盐度相关.从春季到夏季,高丰度区随台湾暖流向北扩展,并在闽浙沿岸水团与台湾暖流交汇处形成高丰度分布区[＞2 500ind/(100 m3)];从夏季到秋季,浮游十足类随着台湾暖流继续向北,在与长江冲淡水交汇处形成较高丰度区.水温和海流是影响东海浮游十足类总丰度分布的主要环境因子.
Based on the data of four seasonal censuses in the East China Sea （23°30＇ - 33°N, 118°30＇ - 128° E） during 1997 - 2000, the distribution and the seasonal changes of pelagic Decapods abundance, regression contribution of dominant species abundance to total abundance and environmental effects on pelagic Decapods abundance were studied with qualitative and quantitative methods. The results showed clear seasonal changes of pelagic Decapods abundance, which peaked in summer （451 ind/100 m^3） and autumn （71 ind/ 100 m^3）, but dropped to the lowest in spring （24 ind/100 m^3）. In spring, there was nearly no pelagic Decapods in the northern shallow waters of the East China Sea （29°30＇ -33°N, 123°30＇ - 125＇E）. Except for winter, pelagic Decapods showed a higher abundance in the offshore than in the off-sea in the rest three seasons. Based on the results of dominance and regression contribution analysis, the pelagic Decapods abundance was mainly governed by the abundance of Lucifor intermedius. Their abundance in summer and autumn, and the overall abundance in 4 seasons were remarkably related with water temperature, but not with salinity. In winter, the abundance was only related with salinity whereas in spring it was related with both water temperature and salinity. The high distribution area of pelagic Decapods gradually expanded northwards with the movement of Taiwan warm current from spring. In summer, a distribution area with abundance over 2 500 ind/100 m3 was observed in the converged areas by Taiwan warm current and the Fujian-Zhejiang coastal waters. In autumn, a high abundance area was formed in the converged area of Taiwan warm current and the Changjiang dilute waters. Water temperature and marine currents were found to be the most important environmental factors affecting the changes of pelagic Decapods abundance in the East China Sea.
出处
《中国水产科学》
CAS
CSCD
北大核心
2005年第5期614-620,共7页
Journal of Fishery Sciences of China
基金
国家"973"重点基础研究发展规划项目(2001CB409700)
国家生物栖息环境调查与研究专题(HY-126-02)
关键词
东海
浮游动物
浮游十足类
数量分布
East China Sea
zooplankton
pelagic Decapods
abundance distribution
