Abstract:
: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.
journal_name
Ecologyjournal_title
Ecologyauthors
Roach KA,Tobler M,Winemiller KOdoi
10.1890/11-0276.1subject
Has Abstractpub_date
2011-11-01 00:00:00pages
2056-62issue
11eissn
0012-9658issn
1939-9170journal_volume
92pub_type
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