Máloštětinatí opaskovci (Annelida: Clitellata) jsou jakožto významná složka permanentní fauny silně závislí na charakteru prostředí, v němž žijí. Proto výskyt určitých druhů může indikovat míru ovlivnění jejich habitatů. Článek se zabývá historií výzkumu máloštětinatých opaskovců a příklady studií této skupiny z různého prostředí, od toků téměř neovlivněných až po silně antropogenně znečištěné., Aquatic oligochaetes (Annelida: Clitellata) as an important group of permanent bottom fauna are strongly dependent on environmental characteristics of their habitats. Consequently, the occurrence of a particular species can indicate the level of environmental quality. The article describes the history of oligochaete research and presents case studies from different environments from almost natural to sites with high anthropogenic impact., and Jana Schenková.
The importance of stream corridors and flood deposits for the spreading of molluscs is demonstrated using some examples from the Czech territory. Three types of floodplain debris, which contain shell accumulation, are distinguished: allochtonous debris accumulated by river flow on riversides, autochtonous accumulation in quiet parts of alluvium far from the main flow, and accumulation caused by strong turbulence during flooding. and Vojen Ložek, Lucie Juřičková.
The conditions for the use of snail shells from flood deposits are characterized. Snail s can spread up and/or down stream, but suitable flood deposits containing shells are usually found in the lowlands. Flood debris can contain shells of rare and subterranean species, occurring in a river environment in negligible numbers. Fossil shells in this material indicate nearby fossiliferous sediments. and Vojen Ložek, Lucie Juřičková.