Chemosynthetic trophic support for the benthic community at an intertidal cold seep site at Mocha Island off central Chile |
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| Authors: | Javier Sellanes,Germá n Zapata-Herná ndez,Silvio Pantoja,Gerdhard L. Jessen |
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| Affiliation: | 1. Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile;2. Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile;3. Centro de Investigación Oceanográfica en el Pacífico Sur-Oriental (COPAS), Universidad de Concepción, Concepción, Chile;4. Programa de Postgrado en Oceanografía, Departamento de Oceanografía, Universidad de Concepción, Concepción, Chile |
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| Abstract: | We analyzed C and N stable isotope ratios of benthic fauna and their potential food sources at an intertidal methane seep site and a control site without emanation at Mocha Island (central Chile). The objective was to trace the origin of the main food sources used by the local heterotrophic fauna, based on the hypothesis that chemosynthetic production could be partially fueling the local food web at the seep site. Food sources sampled at both sites included macroalgae, particulate organic matter and bacteria-like filaments found growing over the red algae Gelidium lingulatum within the areas of active methane release. |
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| Keywords: | intertidal benthos food web microbial filaments methane seeps stable isotopes mixing models |
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