Copepoda source details

Xu, Z.L. (2006). [Ecological characters of the Eucalanus subcrassus population in the East China Sea.]. Acta Ecologica Sinica / Shengtai Xuebao. 26(4):1151-1158. (In Chinese.).
120999
Xu, Z.L.
2006
[Ecological characters of the Eucalanus subcrassus population in the East China Sea.]
Acta Ecologica Sinica / Shengtai Xuebao
26(4):1151-1158. (In Chinese.)
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:Data presented in this paper were obtained duirng four cruises conducted in the East China Sea(23。30 ~33。N,1 l8。  30 一1 28。E)duirng four different seasons from 1 997 to 2000.Ecological characters of the population of a copeop d,Eucalanus  subcrassus in the East China Sea was analyzed using different methods, such as ecological index and the vairance contirbution  analysis,and further compared with the histoircal data of 1979~1980.Results show a clear seasonal pattern of the E.subcrassus  with an abundance on average:autumn(5.40 ind/m3)> summer(2.09 ind/m )> winter(O.93 ind/m ) > spirng(O.17 ind/  m ).The dominance of E. subcrassus also changed seasonally with the same tendency as its abundance,autumn(0.1 0) >  summer(0.08) > winter(0.07) > spirng(0.O1).As a dominant species of copeop ds in the East China Sea,E.subcrassus  predominated in summer and autumn.The percentages of the E. subcrassus in total abundance of copeop ds were 9.94% in the  summer and 9.32% in the autumn,respectively,compare to the lowest(2.46% )in the spirng.Occurrence was the highest  (98.22%)in the autumn,then the winter(84.62%)and the lowest(49.62% )in the spirng.E.subcrassus was the second  dominant species in copeop ds in the summer,fall and winter.Its contirbutions to totla abundance of copeop ds(口)in summer and  winter were 0.39 and 0.27,respectively,following Calanus sinicus(0.88 and 0.45),and 0.46 in autumn that was only lower  than Euchaeta concinna(0.56).In thespring,the occurrence was very low.Another character,indices of clumping(,)of E.  ¥ubcrassus in four seasons were positive. The index was higher in autumn and summer. In spirng, E . subcrassus mainly distributed at the Taiwan Strait where water temperatuer was higher than other zones.As water temperatuer Yose, E . subcrassus  rn0ved toward north and distributed widely in waters wheer water temperatuer and salinity were higher than 24.O℃ and 32.5%o,  erspective1v,from summer to autumn.The vairation of its abundance was associated to bottom water temperature,which was only  temperatuer,dependent in spirng and summer, surface and bottom slainity as well as bottom temperatuer related in autumn, and  neither temperature nor salinity associated in winter.Compairson between the data presented in this paper and the data obtained  from 1979  1980 indicates that the average abundance of E.subcrassus in 1997 was 10 times hisher than in 1979;the dominance  and percent in total abundance of copepods in 1997 was higher than in the autumn,winter and summer of 1979;the occurrence in  the winter and autumn of 1997 also was higher than in 1979, but in the spirng.This phenomenon might be erlated to global  warming,because the bottom water temperature and salinity, the key environmental factosr that affect the abundance of E.  s bcrassus was closeIv er lated to warm current.The close relationship between the abundance vairation of E.sl cr口ss“ and warm  current in the sea suggests that E . subcrassus is a warln water species in the East China Sea.  Key words:zooplankton;pelagic copepod;Eucalanus subcrassus;East China Sea 
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