Abstract
Colonization of protostelids in microhabitats of forests and grasslands during the winter is lower than in the summer. During the winter, colonization and species richness are greater in the litter than in the aerial microhabitat, whereas during the summer colonization is similar between the aerial and the litter microhabitat. The number of colonies of several species is depressed in the winter when compared to the summer. Prominent examples include Protostelium mycophaga, Soliformovum irregularis, aerial species, and Schizoplasmodiopsis pseudoendospora, a litter species. However, two species, Schizoplasmodiopsis vulgare and Nematostelium ovatum, are more abundant in the winter.