Factors Influencing Spatial Patterns of Molluscs in a Eutrophic Tropical
Journal of the Marine Biological Association of the United Kingdom, 2013, 93(3), 577–589. # Marine Biological Association of the United Kingdom, 2012 doi:10.1017/S0025315412001105 Factors influencing spatial patterns of molluscs in a eutrophic tropical bay r.a.f. neves1,7, c.a. echeverria2,3, l.a. pessoa2,4, p.c. paiva5, r. paranhos6 and j.l. valentin7 1Programa de Po´s-Graduac¸a˜o em Ecologia, Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, CEP 21941-902, Brazil, 2Laborato´rio de Pesquisas Costeiras e Estuarinas, Nu´cleo Interdisciplinar UFRJ-Mar, Universidade Federal do Rio deJaneiro, Rio de Janeiro, Brazil, 3Instituto Virtual Internacional de Mudanc¸as Globais (IVIG–COPPE, UFRJ), Instituto Alberto Luiz Coimbra de Po´s-Graduac¸a˜o e Pesquisa de Engenharia, Universidade Federal do Rio de Janeiro, Brazil, 4Programa de Po´s-Graduac¸a˜o em Biologia Marinha, Departamento de Biologia Marinha, Instituto de Zoologia, Universidade Federal Fluminense, 5Laborato´rio de Polychaeta, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, 6Laborato´rio de Hidrobiologia, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, 7Laborato´rio de Zooplaˆncton Marinho, Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro Samples were collected from 10 stations distributed through three sectors in Guanabara Bay during two consecutive years, in order to determine factors that influence the spatial pattern of molluscs and to describe the structure and composition of this community in a eutrophic estuarine system on the Brazilian coast. Although only one species, the gastropod Heleobia aus- tralis, comprised 77% of mollusc abundance, 59 species were identified in the bay.
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