Distribution and ecological analysis of the Syllidae (Annelida, Polychaeta) from the ensenada de San Simón (Galicia, NW Spain)

• Autores: Eva Cacabelos Reyes, Juan Moreira, Jesús Souza Troncoso
• Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 26, Nº. 2, 2010, págs. 93-102
• Idioma: inglés
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• Resumen

  • Syllids (Annelida: Polychaeta: Syllidae) are one of the most diverse and numerically dominant polychaete taxa on marine benthic assemblages. In this paper, the distribution, diversity and composition of syllid assemblages at the soft bottoms of the Ensenada de San Simón (north-western coast of Spain) is studied by means of quantitative sampling. Sampling was done at 29 stations (8 intertidal and 21 subtidal).

    A total of 1057 individuals belonging to fourteen species were collected. Syllids showed the highest number of species and total abundance at subtidal sediments, and were rare in intertidal areas. The numerically dominant species in subtidal bottoms were Sphaerosyllis hystrix and Parexogone hebes.

    Depth, finer granulometric fractions and calcium carbonate were the most important abiotic factors in determining the patterns of distribution of the syllids in the Ensenada de San Simón. In general, syllid diversity was lower than in other Galician rias which have a greater sedimentary diversity