Osobliwe oczko wodne na Pojezierzu Południowo-Ełckim

Abstract

The small pond (1.3 ha) in the moraine landscape of Pojezierze Ełckie is characteristic for its natural values, especially floral diversity, indicating the existence of various habitats in the same area. They are: the calciphilous charas community Charetum fragilis, representing EU Habitat Directive oligotrophic and mezotrophic water containers with underwater Chara meadows (code 3140), eutrophic waterlilies Nupharo-Nymphaeetum community and water milfoil community Myriophylletum spicati – representing old river-bed and natural eutrophic water containers with associations from Nymphaeion and Potamion (code 3150). Worth mentioning is also mezotrophic the north water lily community Nymphaeetum candidae, which is under strict protection. In the neighbourhood there are patches of riverside carr Circaeo-Alnetum (code 91EO) and Ficaro-Ulmetum (code 91FO) forests. There are also found other protected animal species. The map of objects’ vegetation with marked sites is presented. The analysis of phytocenoses’ distribution shows, that fertile habitats are connected to eutrophication caused by water flowing down from the crop fields, threatening nature mezotrophic habitats.