厦门海域小型浮游动物和桡足类的摄食对浮游植物生长的影响  

Impact of microzooplankton and copepods on the growth of phytoplankton in Xiamen Waters

作　　者：曾祥波[1,2] 黄邦钦[3] 

机构地区：[1]集美大学水产学院,福建厦门361021 [2]厦门大学近海海洋环境科学国家重点实验室,环境科学研究中心,福建厦门361005 [3]厦门大学近海海洋环境科学国家重点实验室环境科学研究中心,福建厦门361005

出　　处：《台湾海峡》2008年第4期459-465,共7页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金资助项目(40376043、40331004)

摘　　要：2005年11月16日和27日，运用稀释法和桡足类添加法，对厦门宝殊屿海域小型浮游动物及桡足类的摄食对浮游植物生长的影响进行了研究．结果表明，各粒级浮游植物的生长率均大于小型浮游动物的摄食率，小型浮游动物对总的Chla和nano-Chla具有一致的显著的摄食作用（0．51—0．78d。），当存在螺旋环沟藻等大型的异养甲藻时，亦能摄食micro-级浮游植物．所添加的桡足类主要摄食micro-级的浮游植物，也显著摄食小型浮游动物，16日，所添加的桡足类促进nano-级浮游植物的每天生长效应达0．03ind／dm^3．说明了厦门海域小型浮游动物及桡足类的摄食共同控制着浮游植物的生长．由于桡足类的杂食性．可产生一定的营养级联效应．Dilution the effect of copepod addition incubations were conducted in Xiamen Baozhu waters on November 16 and 27 in order to study the impact of microzooplankton and copepods grazing on the growth of phytoplankton. The results showed that the growth rates of all phytoplankton size categories were higher than the associated microzooplankton grazing rates. Microzooplankton grazing rates on total and nano-Chla were significantly consistent （0.51- 0.78d^-1）, but microzooplankton could also graze micro-phytoplankron when larger heterotrophic dinoflagellates （ such as Gyrodinium spirale） presented. The added copepods mainly grazed on micro-phytoplankton and mierozoop- lankton. The presence of copepods could enhance the nano-Chla growth at a rate of 0.03ind/（dm^3 · d） on November 16. It showed that both microzooplankton and copepods had controlled the phytoplankton growth in Xiamen Waters and trophic cascading effects might have caused by the grazing of copepod on microzooplankton.

关 键 词：小型浮游动物 桡足类 浮游植物 营养级联效应 厦门海域 

分 类 号：Q178.1[生物学—水生生物学]