Grazing pressure of microzooplankton on phytoplankton in Xiamen Waters
- 海洋环境－已发表论文 
应用稀释法对厦门海域浮游植物生长率(k)和微型浮游动物的摄食率(g)进行了估算。结果显示:5月,西海域18测站k、g分别为2.41、0.78d 1;南部海域27测站分别为2.43、1.32d 1。8月18测站k、g分别为3.00、2.90d 1;27测站分别为1.94、0.91d 1。说明厦门海域作为典型的亚热带港湾,具有高的k、g值。分粒级研究结果显示:8月,18测站微型浮游动物对微型浮游植物(Micro)具摄食偏好;而27测站微型浮游动物对Micro和Nano级的摄食率相近。应用流式细胞技术研究18测站微微型真核浮游植物的k、g,结果表明:春季,生长率和摄食率分别为2.00、1.02d 1;夏季分别为1.52、0.96d 1。Phytoplankton growth rate and microzooplankton grazing rate were estimated in Xiamen Waters using dilution method. In spring, phytoplankton growth rate (k) and microzooplankton grazing rate (g) were 2.41d~(-1)0.78 d~(-1), respectively, at station 18, Western Xiamen Waters, and kg were 2.43 d~(-1)1.32 d~(-1), respectively, at station 27 which represents Southern Xiamen Waters. In spring, kg were 3.00 d~(-1)2.90 d~(-1), respectively, at station 18, kg were 1.94 d~(-1)0.91d~(-1), respectively, at station 27.It shown that Xiamen Waters is the typical subtrophical water with high kg values. Size-fractionated results show that in summer microzooplankton have a preferential grazing on microphytoplankton at station 18, but was not at station 27. Picoeukaryotes were counted by a flow cytometry before and after dilution incubation and kg values at station 18 were estimated (2.00) d~(-1)1.02 d~(-1) for spring and 1.52 d~(-1)0.96 d~(-1) for summer.