Note Sistematiche ed Osservazioni Fitosociologiche Sulle Laminariales del Mediterraneo Occidentale

Abstract

Laminariales from western Mediterranean Sea: taxonomical and phytosociological study. — Laminariales found in the Mediterranean Sea are: Laminaria rodriguezii Bornet, L. ochroleuca De la Pylaie, Saccorhiza polyschides Batters, Phyllaria reniformis Rostafinski, Ph. purpurascens Rostafinski. By diving technique L. rodriguezii and Ph. reniformis was collected off isles Ustica, Stromboli, Pianosa and Montecristo (Thyrrenean Sea) from 50 to 90 mts depth in the coralligenous biocoenose; L. ochroleuca and Ph. purpurascens between Scilla and Ganzirri in the straits of Messina from 45 to 85 mts depth in facies of deep rheophilous biocoenoses; S. polyschides and Ph. reniformis near Villa S. Giovanni and Messina in the facies with Ulva-Corallina-Dictyopteris of photophilous algae biocoenose. Algal vegetation associated with these species of Laminariales in the straits of Messina is characterized by Atlantic-temperate elements (Ulva olivascens, Halurus equisetifolius, Cryptopleura ramosa, Giffordia hincksiae, etc…).