摘要
本文根据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,用生态特征指标和聚集强度测度等分析方法,分析了东海海樽类优势种的数量变化和生态适应。结果表明:东海海樽类优势种有双尾纽鳃樽东方亚种(Thaliademocraticaorientalis)、小齿海樽(Doliolumdenticulatum)、Doliolumsp.、软拟海樽(Dolioettagegenbauri)等4种。双尾纽鳃樽东方亚种和软拟海樽适温适盐范围较小,属于狭温狭盐性暖水种;Doliolumsp.和小齿海樽属于广温广盐性的暖水种。狭温狭盐性的暖水种往往具有较高的丰度、聚集强度和较低的出现频率,广温广盐性的暖水种则与之相反。冬夏季是两类不同优势种交替的季节。双尾纽鳃樽东方亚种、小齿海樽数量与水文环境因子线性关系不显著,Doliolumsp.丰度与底层温度呈正相关(F=4.17,P=0.042),软拟海樽与底层温度呈极显著的正相关(F=18.3,P<0.0001)。春季海樽类优势种在东海南部的高丰度区与黑潮表层水对陆架的入侵在时间和空间上基本一致。双尾纽鳃樽东方亚种是冬、春、夏3季黑潮暖流指示种,软拟海樽仅是春。
Based on data from four seasonal oceanographic censuses in the East China Sea （23°30＇ - 33＂N, 118°30＇ - 128°E） in 1997 - 2000, the distribution of the dominant species of Thaliacea in the East China Sea and their ecological adaptability were studied by quantitive methods such as analysis of ecological indices and aggregate intensity. Results showed four dominant species of Thalia dernocratica orientalis Toxioka, Doliolum denticulatum Quoy et Gaimard, Doliolum sp. and Dolioetta gegenbauri Uljanin, which can be categorized into two groups according to their different favorable habitability. The first group included tropical species adapted to limited warm current environment in spring and summer such as T. democratica orientalis and D .gegenbauri. The second group included tropical species acclimatized to broad temperature and salinity in four seasons, represented by D. denticulaturn and D. sp. However, the former was showed high abundance, high aggregate intensity and low frequency of occurrence in contrast to the former. T. dernocratica orientalis covered a high proportion of the total abundance in spring while D. gegenbauri dominated in autumn. T. democratica orientalis and D. Gegenbauri were dominant species contributing to total abundance of Thaliacea in summer whereas D. denticulaturn and T. democratica orientalis dominated in winter. Two seasons were defined by this change of dominance. Abundances of T. democratica orientalis and D. denticulaturn did not show significant linear correlations with water environment factors. The abundances of D.sp. showed positive correlation with bottom temperature （ F = 4.17, P ： 0.042） while D.gegenbauri was also positively related with bottom temperature （ F = 18.3, P 〈 0.0001）. Moreover, the richest area for these species lay in the south of the East China Sea, where waters of the Kuroshio invaded the continent shelf in spatial-temporal distribution in spring. It was found that T. dernocratica orientalis was an important indicator species of Kuroshio in spring, summer and winter while D. gegenbauri was the indicator species only in spring and summer [Acta Zoologica Sinica 52 （1）： 53 -62, 2006].
出处
《动物学报》
SCIE
CAS
CSCD
北大核心
2006年第1期53-62,共10页
ACTA ZOOLOGICA SINICA
基金
国家自然科学基金重大研究计划"全球变化及其区域响应"(No.90511005)资助~~
关键词
浮游动物
海樽类
优势种
生态适应
东海
Zooplankton, Thaliacea, Dominant species, Aggregation intensity, East China Sea
