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Title

Is the availability of different nutrients a critical factor for the impact of bacteria on subterraneous carbon budgets?

AuthorsPortillo Guisado, María del Carmen CSIC ORCID; Porca, Estefanía CSIC; Cuezva, Soledad CSIC ORCID; Cañaveras, Juan Carlos CSIC ORCID; Sánchez Moral, Sergio CSIC ORCID ; González Grau, Juan Miguel CSIC ORCID
KeywordsNutrient
Carbonate precipitation
Carbon sink
Carbon budgets
Subterraneous environments
Issue DateSep-2009
PublisherSpringer
CitationNaturwissenschaften 96(9): 1035-1042(2009)
AbstractBacteria thriving in underground systems, such as karsts, adapt to use a variety of nutrients. Most of these nutrients derive from superficial processes. This study shows that bacteria are able to differentially induce carbonate precipitation or dissolution depending on the availability of nutrients for growth. Different bacterial strains isolated from caves, representing the most common components of these microbial communities, were cultured with different carbon and nitrogen sources (e.g., acetate, glucose, peptone, humic acids) and induced changes in pH were measured during growth. Carbonate can either precipitate or dissolve during bacterial growth. The induction of carbonate precipitates or their dissolution as a function of consumption of specific carbon sources revealed the existence of an active nutrient cycling process in karsts and links nutrients and environmental conditions to the existence of a highly significant carbon sink in subterraneous environments.
Publisher version (URL)http://dx.doi.org/10.1007/s00114-009-0562-5
URIhttp://hdl.handle.net/10261/17030
DOI10.1007/s00114-009-0562-5
ISSN0028-1042
E-ISSN1432-1904
Appears in Collections:(IRNAS) Artículos

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