Grazing impact of microzooplankton on phytoplankton distribution and material cycle in subtropical ocean

初级生产力是高的表层，但浮游植物生物量是高的次表层叶绿素。在亚热带海洋的最大层。为了解决这种不匹配，放牧的微型浮游动物在表层和次表层进行了观察。表层的放牧率（0.08~1.05 d^<-1>）高于叶绿素a最高层（0.01~0.24 d^<-1>），但两层的放牧率存在差异。较高的放牧率表明，放牧是减少表层浮游植物生物量的因素之一，但放牧的影响可能并不总是很大。

Primary productivity is high in surface layer but phytoplankton biomass is high in subsurface Chl.a maximum layer in the subtropical ocean. To solve this mismatch, grazing of microzooplankton in surface and subsurface layers were observed. Grazing rates in surface layer (0.08～1.05 d^<-1>) were higher than those in Chl.a maximum layer(0.01～0.24 d^<-1>) but the rates were variable in both layers. The higher grazing rate suggests that grazing is one of the factors decreasing phytoplankton biomass in surface layer, but the grazing impact maybe not constantly large.