Molluscan assemblages associated with Gigartina beds in the Strait of Magellan and the South Shetland Islands (Antarctica): a comparison of composition and abundance

Polar research

Cristian Aldea¹  Andrés Mansilla²  Johanna Marambio³  Jaime Ojeda⁴  Sebastián Rosenfeld⁷  Jesús S. Troncoso⁷  Mathias Hüne⁸ 

[1] Instituto de Ecología y Biodiversidad (IEB), Santiago, ChileCorrespondence;Instituto de Ecología y Biodiversidad (IEB), Santiago, ChileView further author information;Programa GAIA-Antártica, Universidad de Magallanes, Punta Arenas, ChileView further author information;Departamento de Ciencias y Recursos Naturales, Universidad de Magallanes, Punta Arenas, Chile;Departamento de Ecología y Biología Animal, Facultad de Ciencias del Mar, Universidad de Vigo, Vigo, SpainView further author information;Fundación Ictiológica, Santiago, ChileView further author information;Laboratorio de Macroalgas Antárticas y Subantárticas, Universidad de Magallanes, Punta Arenas, Chile;Laboratorio de Macroalgas Antárticas y Subantárticas, Universidad de Magallanes, Punta Arenas, Chilehttp://orcid.org/0000-0003-3863-9750

关键词: Bivalvia;    Gastropoda;    Polyplacophora;    algae beds;    sub-Antarctic;    diversity;    MBP: Magellanic biogeographical province;    NMDS: non-metric multidimensional scaling ordination;   

DOI  :  10.1080/17518369.2017.1297915

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

ABSTRACTIn this paper we evaluated the composition and abundance of molluscs associated with beds of the red algae Gigartina, located in the South Shetland Islands (Antarctic Peninsula) and the Strait of Magellan (southern Chile). During the summer season of 2013, samples were obtained by scuba diving using a 0.25 m2 quadrat, arranged randomly within the bed. We extracted a total of 15 quadrats per sampling site. For Antarctic Peninsula beds the most abundant species were the bivalve Lissarca miliaris (233 individuals) and the gastropod Laevilacunaria antarctica (94 individuals), while for Strait of Magellan beds the most abundant species was the polyplacophoran Callochiton puniceus (36 individuals). Comparative analysis between the two molluscan assemblages showed significant differences in the faunal composition between the Antarctic Peninsula and Strait of Magellan (f = 64.474; p = 0.0001). Therefore, molluscs reported in both areas are characteristic of their respective biogeographic area. Finally, Gi...

【 授权许可】

CC BY-NC