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A new trophic link between the pelagic and benthic systems on the Antarctic shelf

Opened Access A new trophic link between the pelagic and benthic systems on the Antarctic shelf

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Autor: Gili, Josep Maria
Rossi, Sergio
Pagès, Francesc
Orejas, Covadonga
Teixidó, Nuria
López González, Pablo José
Arntz, Wolf E.
Departamento: Universidad de Sevilla. Departamento de Zoología
Fecha: 2006
Tipo de documento: Artículo
Resumen: During the expeditions EASIZ II and EASIZ III carried out off the Antarctic Peninsula with RV ‘Polarstern’, a prey, until now never registered, was observed in the gastrovascular cavities of octocorallian Anthomastus bathyproctus colonies. A. bathyproctus gastrovascular contents contained salps of the species Salpa thompsoni in 83 to 88% of the colonies. Salps represented almost 100% of the prey items found in the octocorallian polyps. Salp chains were observed drifting just above the sediment. These chains undertook vertical migrations down to a depth of 700 m, reaching the seafloor. The captured salps had stomachs full of microplanktic prey, mainly diatoms and other phytoplankton cells. Fatty acids, considered to be of diatom origin, were detected in the stomachs of salps and in their tunica. The presence of such signature lipids was also detected in the octocorallian coenenchyme, although their concentration was considerably lower. These results suggest that salps may pla...
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Tamaño: 863.0Kb
Formato: PDF

URI: https://hdl.handle.net/11441/71650

DOI: 10.3354/meps322043

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