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Fitosociologia numero 44 (1)

pag. 105-110: Stato delle conoscenze e alterazioni indotte dal disturbo sulle fitocenosi delle coste sabbiose laziali

S. Ercole, A. Acosta1 & C. Blasi2

Dipartimento Difesa della Natura, Agenzia per la Protezione dell’Ambiente e per i Servizi Tecnici, via Curtatone, 3, 00185 Roma; e-mail: stefania.ercole@apat.it

1Dipartimento di Biologia, Università di Roma Tre, V.le Marconi 446, 00146 Roma

2Dipartimento di Biologia Vegetale, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma

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abstract

Knowledge and alterations caused by disturbance of sandy coastal phytocoenoses of Lazio. In this paper we discuss the effects of disturbance on the plant communities of fixed and mobile dunes. Human driven alterations may act on these environments modifying the entire ecosystem, including both biotic and abiotic components, and transforming the structure and composition of the community. In order to interpret these alterations the comparison between Actual Real Vegetation and Potential Natural Vegetation results very useful. Presently the Actual Real Vegetation along our coasts differs increasingly from the Potential one and provides, therefore, a useful reference for the evaluation of the conservation state of a site. Moreover the understanding of the role of substitution phytocoenoses, the interpretation of spatial and floristic alterations of the communities, in addition to an attention for the morphological transformations of the system, may also be useful for such an evaluation.

keywords

fragmentation, psammophilous species, potential natural vegetation, substitution communities