A dynamic change in environmental conditions among floodplain habitats with different geomorphology might be a significant trigger in determining rotifer functional diversity. The aim of the study was to test the importance of environmental differences between several waterbody types, their positions within the floodplain and supporting microcrustacean communities in the structuring of rotifer functional feeding guilds. The study was conducted in Kopacki rit floodplain during 2008 at five sites (two lakes, two channels and the main river). ANOSIM showed a significant difference in spatial distribution among rotifer feeding guilds. Redundancy analyses indicated biotic variables to significantly influence rotifer functional diversity in lake systems while in channel environments and the main riverbed guild representation was mainly influenced by limnological variables. Individual guild abundance changed relative to the site position within the floodplain as well, where the increased distance from the main riverbed resulted in increased rotifer numbers, and a different proportion of microfilter-feeders and macrofilter-feeders was recorded. The multiple linear regression showed a significant relation of macrofilter-feeder rotifers with microcrustaceans pointing to notable exploitative competition among these groups. The results highlight the ecological importance of all types of natural floodplain habitats necessary for preserving and maintaining the rotifer diversity.

中文翻译：

---

环境差异在轮虫功能多样性结构中的重要性

具有不同地貌的洪泛平原栖息地环境条件的动态变化可能是确定轮虫功能多样性的重要触发因素。该研究的目的是测试几种水体类型之间环境差异的重要性，它们在漫滩中的位置以及支持微甲壳类群落在轮虫功能性饲养行会的构建中的重要性。该研究于 2008 年在 Kopacki rit 洪泛区的五个地点（两个湖泊、两个渠道和主要河流）进行。ANOSIM 显示轮虫饲养公会的空间分布存在显着差异。冗余分析表明，生物变量显着影响湖泊系统中轮虫的功能多样性，而在河道环境中，主要河床行会代表主要受湖沼学变量的影响。个体公会丰度也相对于洪泛区内的站点位置发生变化，与主要河床的距离增加导致轮虫数量增加，并且记录了不同比例的微滤食性动物和大型滤食性动物。多元线性回归显示大型滤食性轮虫与微型甲壳类动物之间存在显着关系，表明这些群体之间存在显着的剥削性竞争。结果强调了保护和维持轮虫多样性所必需的所有类型的自然洪泛区栖息地的生态重要性。