Enteromorpha (Chlorophyta) populations in the Nielba River and Lake Laskownickie

Enteromorpha intestinalis (4 forms) and E. compressa (2 forms) were identified in Lake Laskownickie, while only E. intestinalis (2 forms) was identified in the Nielba River. The massive appearance of both species of Enteromorpha in the lake was occurred mostly during early summer (June) with the position of the population in the water column ranged from benthic to floating. In the Nielba River E. intestinalis developed in May or June with maximum coverage in July or in the beginning of August. In both cases Enteromorpha preferred sunny places and well oxygenated waters. Additionally, it was found that in both habitats thallus was significantly higher at the end of the summer than at the beginning