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*En hemeroteca, SIBE-San Cristóbal
Hydrogen sulfide, bacteria, and fish: a unique, subterranean food chain
Roach, Katherine A. ; Tobler, Michael (coaut.) ; Winemiller, Kirk O. (coaut.) ;
Contenido en: Ecology Vol. 93, no. 11 (November 2011), p. 2056-2062 ISSN: 0012-9658
Bibliotecas: San Cristóbal
SIBE San Cristóbal
51055-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en: Inglés |
Resumen en inglés

Photoautotrophs are generally considered to be the base of food webs, and habitats that lack light, such as caves, frequently rely on surface-derived carbon. Here we show, based on analysis of gut contents and stable isotope ratios of tissues (13C/12C and 15N/14N), that sulfur-oxidizing bacteria are directly consumed and assimilated by the fish Poecilia mexicana in a sulfide-rich cave stream in Tabasco state, Mexico. Our results provide evidence of a vertebrate deriving most of its organic carbon and nitrogen from in situ chemoautotrophic production, and reveals the importance of alternative energy production sources supporting animals in extreme environments.