Abstract
Remarks on ecology of several small agarics growing in carr forests of <em>Querco-Ulmetum minoris</em> and <em>Astrantio-Fraxinetum</em> type are presented and discussed. They all occupy special microhabitat (bare ground), belong to certain functional group (saprotrophs) and seem to be connected with carr forest habitat. The base rich or neutral soil humus, generally not favoured by fungi, together with extreme moisture and fast decomposition of litter causes that some humicolous macrofungi in carr forests form mostly small and short-living fruit bodies of hygrophyte character. They represent several genera: <em>Conocybe, Coprinus, Cystolepiota, Entoloma, Flammulaster, Lepiota, Melanophyllum</em> and <em>Pholiotina</em> of the order Agaricales. New localities are given, ecological amplitude is analised and preliminary mycosynusial consideration is presented.
Highlights
Carr forests belong to azonal vegetation, strictly connected with river valleys, streams and other water courses
Carr forests constitute in Poland only 0.086% (260.2 km2) of the forested area (Matuszkiewicz 2001) and gradually and constantly diminish
If the ground water table decreases carr forests may turn into oak-hornbeam forests, in many areas they are converted into arable lands, fields or pastures
Summary
Carr forests belong to azonal vegetation, strictly connected with river valleys, streams and other water courses. They grow on rich, fertile, humose soil of black earth type and nourish lush, hygrophilous multilayer vegetation. Carr forests constitute in Poland only 0.086% (260.2 km2) of the forested area (Matuszkiewicz 2001) and gradually and constantly diminish. If the ground water table decreases carr forests may turn into oak-hornbeam forests, in many areas they are converted into arable lands, fields or pastures. In Wielkopolska region they requires special attention and protection. They preserve water sources and keep unique and still poorly known living world of plants, animals and fungi
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