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Fitosociologia numero 45 (1)

pag. 3-21: Diversità fitocenotica delle dune costiere nord-adriatiche. 1 – Le comunità fanerofitiche

U. Gamper1, L. Filesi2, G. Buffa1 & G. Sburlino1

1Dipartimento di Scienze Ambientali, Università degli Studi di Venezia, Campo Celestia 2737/b, I-30122 Venezia; e-mail: gamper@unive.it, buffag@unive.it, sburlino@unive.it

2Dipartimento di Pianificazione, Università IUAV di Venezia, Santa Croce 1957, I-30135 Venezia; e-mail: leonardo@iuav.it

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abstract

Phytocoenotic diversity of the N-Adriatic coastal sand dunes. 1 – The phanerophytic communities. The phanerophytic and nanophanerophytic communities present on the N-Adriatic coastal sand dunes have been studied from the phytosociological point of view. The floristic-sociological analysis pointed out the existence of the following endemic associations: Vincetoxico-Quercetum ilicis ass. nova, Viburno lantanae-Phillyreetum angustifoliae ass. nova, Erico carneae-Osyridetum albae ass. nova and Junipero-Hippophaetum fluviatilis. Viburno lantanae-Phillyreetum and Erico carneae-Osyridetum represent respectively the phanerophytic and the chamaephytic-phanerophytic mantle of the Quercus ilex wood, while Junipero-Hippophaetum fluviatilis is the mature stage of an independent series. The high originality of the vegetation is the result of both bioclimatic and phytogeographic features; the temperate macrobioclimate causes the extrazonal character of the holm-oak wood; the floristic migrations during the different climatic phases of the last postglacial period influenced the composition of the flora, which is made up by taxa of different origin (mainly mediterranean and eastern but even orophilous). The chamaephytic, hemicryptophytic and therophytic communities will be the object of a next paper.

keywords

biodiversity, N-Adriatic coast, plant communities, sand dunes