摘要
根据1997～2000年对东海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, 探讨了东海浮游十足类的种类组成、时空分布、多样性及与环境的关系.结果显示:东海4季共出现浮游十足类9种,其中秋季4种,冬季5种,夏春季各7种;中型莹虾、细鳌虾、汉森莹虾、刷状莹虾和正型莹虾是常见种,其余4个为稀有种.春季转至冬季,夏季转至秋季、秋季转至冬季,其种类随着季节的变换而出现更替.种数分布在冬春季主要受温度的影响,夏秋季的主要影响因子是盐度.冬春季种类变化主要与台湾暖流与黄海冷水团季节性的进退以及东海气温季节性变化有关,夏季种类分布特征与沿岸流和暖流势力强弱有关.常见种对不同季节的环境适应性较强,其出现频率和个体丰度远大于稀有种.中型莹虾的大量出现是影响东海浮游十足类多样性指数值较低的主要原因.
Based on the data of four seasonal oceanographic censuses in the East China Sea （23°30＇～ 33° N, 118°30＇～ 128°E）in 1997～ 2000, the species composition and the diversity of pelagic Deeapods as well as their relations with environmental variables were discussed. The results showed that there were totally 9 different species, and 7 were in spring and summer respectively, 4 in autumn and only 5 in winter, Lucifer intermedius, L. hartseni, L. typus, L. penicillifer and Leptochela gracilis were common species of pelagic Decapods in the East China Sea. The others were rare species. According to the calculated alternation fraction （ R ）, the species composition showed a clear seasonal alternation with the changes of seasons from spring to summer,summer to autumn and autumn to winter. Except the common species, the five rare species were alternately in different seasons. Moreover, the environmental variables have different impacts on the distribution of pelagic Decapods species numbers in different seasons. The distribution in winter and spring were related with the water temperature. However, the salinity was a major determinant of the distribution in summer and autumn. The causal analysis of relation between distribution of species number and seasonal change showed that the distribution of species number in winter and spring depended on ebb and flow of the Taiwan Warm Current and the Yellow Cool Waters. The distribution in summer was related with change of the Changiiang Diluted Water and warm current. Because some common species of pelagic Decapods, such as L. intermedius, could adapt at different environment, these species usually showed high occurrence and very large values in their abundances. This would cause the uneven distribution of different species in the East China Sea, which was the major reason to the low diversity of pelagic Deeapods in the East China Sea.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2005年第4期1-4,共4页
Marine Environmental Science
基金
国家重点基础研究发展规划(973)项目(2001CB409700)
我国近海海洋综合调查与评价专项(908-02-01-03)
关键词
浮游动物
浮游十足类
种类组成
多样性
东海
zooplankton
pelagic Decapods
diversity
species composition
East China Sea
