Study on Different Size-fractionated Phytoplankton Assemblage Change in the Mesocosm Ecosystem  

围隔生态系内不同粒级浮游植物群落变化研究(英文)

作　　者：李涛[1,2] 刘胜[1] 黄良民[1] 简伟军 严岩[1,4] 

机构地区：[1]LMB和LED中国科学院南海海洋研究所,广东广州510301 [2]中国科学院海南热带海洋生物实验站,海南三亚572000 [3]深港产学研基地海岸与大气研究重点实验室,广东深圳518057 [4]中国科学院大亚湾海洋生物综合实验站,广东深圳518121

出　　处：《Marine Science Bulletin》2008年第2期58-67,共10页海洋通报（英文版）

基　　金：National‘973’Program(2001CB409707);the Natural Science Foundation ofChina(No.40206016 and U0633007);the Key Program of National Natural Science Foundation of China(No.40531006);the Field Platform&Station Foundation of CAS.

摘　　要：A algal bloom process had been simulated via field mesocosm experiment, and the change of phytoplankton assemblage of different sizes in different growing phases had been studied. Nutrients addition could promote the growth of phytoplankton In the mesocosm of Prorocentrum donghaiense （M1） and the mesocosm of natural waters （M2）, and the peaks of chlorophyll a were 112.79 mg/m and 235.60 mg/m, respectively. The restraining effect of nano-phytoplankton on pico-phytoplankton growth was stronger in M2 than in M1. When nutrients were abundant, the relative growth rate of diatom was higher than that of P. donghaiense, and they reached the peak quickly and then came to die out very fast. The decreasing of Si promoted diatom bloom to die out.通过现场围隔实验,模拟赤潮发生过程,研究了种群不同生长阶段中不同粒级浮游植物种群的变化情况。结果表明,添加营养盐能有效促进浮游植物的生长,东海原甲藻围隔(M1)和自然水体围隔(M2)中浮游植物分别于第7天和第4天出现生长高峰,叶绿素a最大值分别为112.79 mg/m和235.60 mg/m。微型浮游植物与微微型浮游植物存在竞争,微型对微微型生长的抑制作用:M2>M1。在营养盐丰富时,硅藻的增殖速率比东海原甲藻快,达到高峰期时间短,消亡也快。硅的减少促进硅藻水华的消亡。

关 键 词：Daya Bay MESOCOSM PHYTOPLANKTON Size fractionation Community change 

分 类 号：Q948.8[生物学—植物学]