Quantitative analysis of soft-bottom molluscs in the Bellingshausen Sea and around Peter I Island

Polar research

Jesús S. Troncoso¹  Cristian Aldea²  Francisco García³  Ana Ramos⁴  Patrick Arnaud⁵ 

[1] Departamento de Ecología y Biología Animal, Facultad de Ciencias del Mar, Campus Lagoas Marcosende, 36310, Universidad de Vigo, SpainCorrespondence;Departamento de Ecología y Biología Animal, Universidad de Vigo, Spain, and Fundación Centro de Estudios del Cuaternario de Fuego-Patagonia y Antártica (CEQUA), Avenida Bulnes 01890 – Casilla 113-D, Punta Arenas, Chile;Departamento de Sistema Fisicos, Qvimicosy Naturales, Facultad de Ciencias Experimentales, Universidad Pablo de Olavide, Sevilla, Spain.;IEO Centro Oceanográfico de Vigo, Cabo Estai, Vigo, Spain;Le Jas des Batarins, 04110, Vachères, France

关键词: Soft-bottom;    Molluscs;    Bellingshausen Sea;    Peter I Island.;   

DOI  :  10.1111/j.1751-8369.2007.00033.x

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Macrobenthic soft-bottom molluscs were sampled in 30 stations located in the Bellingshausen Sea at depths ranging from 90 to 3304 m. The samples were collected using a quantitative grab box-corer during the cruises BENTART 03, from 24 January to 3 March 2003, and BENTART 06, from 2 January to 16 February 2006. Molluscs represent 1074 specimens belonging to 62 species of Polyplacophora, Gastropoda, Bivalvia and Scaphopoda. The bivalve Cyamiocardium denticulatum was the most abundant species (448 specimens). The abundance per station varied between 1 and 446 specimens. The Shannon–Wiener diversity index ranged between one specimen and 2.36, the Pielou evenness index ranged between 0.00 and 1 and species richness ranged from 1 to 14 species. Diversity showed great variations at different stations. After multivariate analysis (cluster analysis and nonmetrical multidimensional scaling) based on Bray–Curtis similarities, we were able to separate two principal clusters. The first cluster groups together species ...

【 授权许可】

CC BY-NC