Polychaetes associated with different facies of the photophilic algal community in the Chafarinas Archipelago (SW Mediterranean)
Abstract:To study the polychaetes associated with different facies of the photophilic algal community in the Chafarinas Islands, 18 samples measuring 625 cm2 were scraped by SCUBA dives (0–6 m). Five algal facies were sampled: (1) Stypocaulum scoparium - Cladostephus hirsutus, (2) Padina pavonica, (3) Cystoseira tamariscifolia, (4) Corallina elongata and (5) crustose calcareous rhodophytes (Corallinaceae) with sea urchins. Polychaetes collected belonged to 21 families and 105 species. Syllidae, Nereididae and Sabellidae were the dominant families. Odontosyllis ctenostoma, Sphaerosyllis hystrix, Syllis prolifera, Perinereis cultrifera, Platynereis dumerilii, and Amphiglena mediterranea were found throughout the community. The Bray-Curtis similarity analysis, took into account feeding guilds and life styles, showed rather high similarity of this five facies. Two main clusters were identified according to the increasing of high of algal cover and the spatial heterogeneity. The first group is formed by the facies with Padina pavonica and the facies with Corallina elongata, the second group contains the facies of Stypocaulum scoparium - Cladostephus hirsutus and Cystoseira tamariscifolia. The facies of crustose calcareous rhodophytes with sea urchins, was clearly separated from the rest.
Document Type: Research Article
Publication date: July 1, 2000
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