Kinner N E, Harvey R W, Kazmierkiewicz-Tabaka M
Environmental Research Group, University of New Hampshire, Durham 03842, USA.
FEMS Microbiol Rev. 1997 Jul;20(3-4):249-59. doi: 10.1111/j.1574-6976.1997.tb00312.x.
Little is known about the role of protists in the saturated subsurface. Porous media microcosms, containing bacteria and protists, were used to determine whether flagellates from an organically contaminated aquifer could substantively affect the number of free-living bacteria (FLB). When flagellates were present, the 3-40% maximum breakthrough of fluorescently labelled FLB injected into the microcosms was much lower than the 60-130% observed for killed controls. Grazing and clearance rates (3-27 FLB flag-1 h-1 and 12-23 nl flag-1 h-1, respectively) calculated from the data were in the range reported for flagellates in other aqueous environments. The data provide evidence that flagellate bacterivory is an important control on groundwater FLB populations.
关于原生生物在饱和地下层中的作用，人们了解甚少。含有细菌和原生生物的多孔介质微观世界被用于确定来自有机污染含水层的鞭毛虫是否会对自由生活细菌（FLB）的数量产生实质性影响。当存在鞭毛虫时，注入微观世界的荧光标记FLB的最大突破率为3 - 40%，远低于杀死对照组所观察到的60 - 130%。根据数据计算出的摄食率和清除率（分别为3 - 27个FLB/鞭毛虫·小时和12 - 23纳升/鞭毛虫·小时）在其他水环境中报道的鞭毛虫范围内。这些数据提供了证据，表明鞭毛虫捕食细菌是对地下水中FLB种群的重要控制因素。
