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Fitosociologia numero 45 (2)

pag. 3-40: La vegetazione acquatica e palustre dell’Italia nord-orientale. 2 - La classe Potametea Klika in Klika et V. Novák 1941

G. Sburlino1, M. Tomasella2, G. Oriolo2, L. Poldini3 & F. Bracco 4

1Dipartimento di Scienze Ambientali, Campo Celestia 2737b, I-30122 Venezia; e-mail: sburlino@unive.it

2Via Marziale 28, I-34074 Monfalcone (GO); e-mail: michela.tomasella@gmail.com, giuseppe.oriolo@gmail.com

3Dipartimento di Biologia, Università di Trieste, via L. Giorgieri 10, I-34127 Trieste; e-mail: poldini@univ.trieste.it

4Dipartimento di Ecologia del territorio, Università degli Studi di Pavia, via S. Epifanio 14, I-27100 Pavia; e-mail: francesco.bracco@unipv.it

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abstract

Aquatic and marsh vegetation of the north-eastern Italy. 2 - The class Potametea Klika in Klika et V. Novák 1941. The rhizophytic vegetation belonging to Potametea in north-eastern Italy is described. Eighteen associations and ten plant communities have been identified, belonging to four alliances (Ranunculion fluitantis, Potamion, Ranunculion aquatilis, Nymphaeion albae) and one order (Potametalia). Two associations are described as new: Potametum prolixi and Sparganio-Vallisnerietum spiralis. For each community, information about the floristic composition, syntaxonomy, synphysionomy, synecology and synchorology is provided. The study pointed out the progressive reduction or disappearance in many localities of the most precious typologies, as a result of environmental modifications and of the eutrophication of water bodies.

keywords

north-eastern Italy, Potametea, rhizophytic vegetation