The studies concerned qualitative and quantitative analysis of seston Rotifera communities of Ślepiotka stream polluted with communal sewages. The samples were also taken from the small, inforest pond confluence with the stream. The studies were carried out from March to November 1999. The water from the pond, which flew down into the stream, had a good influence on the Rotifera communities living there. The stable increase in species diversity, abundance and stability of Rotifera communities of Ślepiotka stream below the inflow was recorded. The physic-chemical analysis confirmed the favorable influence of the pond on Ślepiotka stream water quality.

From March to November 2000 planctonic Rotifera of the collapse pond Bojszowy - Jedlina were studied. Rich fauna of Rotifera (71 taxons) was recorded. One new for Silesia Region species Erignatha clastopis (Gosse) was found. The qualitative composition of the Rotifera community in that pond differed from other investigated collapse ponds. In spite of high eutrophy domination and constance structure indicated staid character of the Rotifera community in the Bojszowy - Jedlina pond.