Hahn M W., Höfle M G.
FEMS Microbiol Ecol. 2001 Apr;35(2):113-121. doi: 10.1111/j.1574-6941.2001.tb00794.x.
Predation by bacterivorous protists in aquatic habitats can influence the morphological structure, taxonomic composition and physiological status of bacterial communities. The protistan grazing can result in bacterial responses at the community and the species level. At the community level, grazing-induced morphological shifts have been observed, which were directed towards either larger or smaller bacterial sizes or in both directions. Morphological changes have been accompanied by changes in taxonomic community structure and bacterial activity. Responses at the species level vary from species to species. Some taxa have shown a pronounced morphological plasticity and demonstrated complete or partial shifts in size distribution to larger growth forms (filaments, microcolonies). However, other taxa with weak plasticity have shown no ability to reduce grazing mortality through changes in size. The impact of protistan grazing on bacterial communities is based on the complex interplay of several parameters. These include grazing selectivity (by size and other features), differences in sensitivity of bacterial species to grazing, differences in responses of single bacterial populations to grazing (size and physiology), as well as the direct and indirect influence of grazing on bacterial growth conditions (substrate supply) and bacterial competition (elimination of competitors).
在水生栖息地中，食细菌原生生物的捕食作用会影响细菌群落的形态结构、分类组成和生理状态。原生生物的捕食可导致细菌群落在群落和物种水平上产生响应。在群落水平上，已观察到捕食诱导的形态变化，这些变化指向更大或更小的细菌尺寸，或者两个方向都有。形态变化伴随着分类群落结构和细菌活性的变化。物种水平上的响应因物种而异。一些分类群表现出明显的形态可塑性，并显示出大小分布向更大生长形式（丝状、微菌落）的完全或部分转变。然而，其他可塑性较弱的分类群则没有通过大小变化来降低捕食死亡率的能力。原生生物捕食对细菌群落的影响基于几个参数的复杂相互作用。这些参数包括捕食选择性（按大小和其他特征）、细菌物种对捕食的敏感性差异、单个细菌种群对捕食的响应差异（大小和生理），以及捕食对细菌生长条件（底物供应）和细菌竞争（竞争者消除）的直接和间接影响。
