东海南部与台湾以东海域浮游介形类的群落结构

分析东海南部与台湾以东海域浮游介形类的物种和生态类群多样性,并阐述其季节差异与区域差异,同时指出本海区存在4种生态类群,但以高温高盐类群起支配作用.此外,夏、冬两季浮游介形类的丰度有显着的差别,7和12月的均值分别为0.63个/m3和1.22个/m3,而就丰度的水平分布而言,表现出东海南部大于台湾以东海域的分布格局,并在海区的东北部形成数量密集区.同时,还着重阐述本海区的群落结构,本区虽存在3种生态群落,但以外海群落占据绝大部分海域,尤其应指出的是,钓鱼岛邻近海域与台湾北部和东部水域同属于外海群落.最后,分析了由于海域环境因子的变化导致群落生境地理位置的季节性迁移.

The community structure of the planktonic Ostracoda in the waters of the southern East China Sea and the eastern waters off Taiwan I.

The species and diversity of ecological groups of planktonic Ostracoda in the waters of the southern East China Sea and the eastern waters off Taiwan Island are analyzed, the seasonal difference and regional variation are also expounded. The results show that there are four ecological groups in this sea area but the hyperthermal and hyperhaline group plays the predominant role. Meanwhile, there is a distinct difference in the abundance of plank-tonic Ostracoda in summer and winter, the average values are 0.63 and 1.22 ind./m3 in July and December respec-tively. As regarding to the horizontal distribution, its tendency exhibits that the individual density in the waters of the southern East China Sea is higher than that in the eastern waters off Taiwan Island, and a higher concentrated area is formed in the northeast part of this sea area . The community structure in this sea area was emphatically ex-pounded. There are three ecological groups in this sea area but the off-lying community occupies the most part of the sea area. It should be specially noted that all the communities either in the vicinity of waters of Disoyu Island or in the northern and eastern waters off Taiwan Isiand are the common off - lying community. In addition, the seasonal igration of the geographical position of the community habitat resulted from the changes of environmental elements in this waters is also analyzed.