Structure and dynamics of the biota associated with Macrocystis pyrifera (Phaeophyta) from the Beagle Channel, Tierra del Fuego

Abstract

The community associated to the kelp Macrocystis pyrifera from the Beagle Channel (54°00´S; 68°20´W) was studied. Sixty-eight taxa including Algae (5), Porifera (indet.), Bryozoa (7), Nemertea (2), Annelida (10), Mollusca (22), Crustacea (15) and Echinodermata (7) were recognized. A seasonal sampling during one year showed differences in taxa composition when comparing (a) two different environments; (b) the spring-summer period and the autumn-winter period; and (c) the parts of the alga (fronds and holdfast).