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Geothermal and cold springs faunas: Inorganic carbon sources affect isotope values
Author(s) -
Rounick J. S.,
James M. R.
Publication year - 1984
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1984.29.2.0386
Subject(s) - biogeochemistry , isotopes of carbon , total inorganic carbon , invertebrate , carbon fibers , environmental science , environmental chemistry , stable isotope ratio , algae , biomass (ecology) , ecology , oceanography , chemistry , geology , total organic carbon , carbon dioxide , biology , materials science , physics , quantum mechanics , composite number , composite material
Stable carbon isotope ratios of algae and grazing invertebrates at four hot springs and an alpine cold spring in New Zealand were at the extreme end of the range reported for freshwater organisms. This apparently resulted from the influences of diverse inorganic carbon sources, geothermal carbon and biogenic (respiration) CO 2 , being incorporated into biomass carbon at the study sites. Despite similar feeding behavior at all sites (algal ingestion), the isotope ratios of the invertebrates varied because of site‐specific biogeochemistry. This further underscores the need to understand inorganic carbon sources and their influences on resulting isotope ratios for future stable carbon isotope work in freshwater environments.