Articles | Volume 21, issue 9
Hydrol. Earth Syst. Sci., 21, 4283–4300, 2017
Hydrol. Earth Syst. Sci., 21, 4283–4300, 2017
Research article
31 Aug 2017
Research article | 31 Aug 2017

Carbon isotopes of dissolved inorganic carbon reflect utilization of different carbon sources by microbial communities in two limestone aquifer assemblages

Martin E. Nowak et al.

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Cited articles

Aeschbach-Hertig, W. and Gleeson, T.: Regional strategies for the accelerating global problem of groundwater depletion, Nat. Geosci., 5, 853–861, 2012.
Akob, D. M. and Küsel, K.: Where microorganisms meet rocks in the Earth's Critical Zone, Biogeosciences, 8, 3531–3543,, 2011.
Alfreider, A., Schirmer, M., and Vogt, C.: Diversity and expression of different forms of RubisCO genes in polluted groundwater under different redox conditions, FEMS Microbiol. Ecol., 79, 649–660,, 2012.
Aravena, R. and Wassenaar, L. I.: Dissolved Organic-Carbon and Methane in a Regional Confined Aquifer, Southern Ontario, Canada – Carbon-Isotope Evidence for Associated Subsurface Sources, Appl. Geochem., 8, 483–493,, 1993.
Aravena, R., Wassenaar, L. I., and Plummer, L. N.: Estimating C-14 Groundwater Ages in a Methanogenic Aquifer, Water Resour. Res., 31, 2307–2317,, 1995.
Short summary
In the present study we combined measurements of dissolved inorganic carbon (DIC) isotopes with a set of different geochemical and microbiological methods in order to get a comprehensive view of biogeochemical cycling and groundwater flow in two limestone aquifer assemblages. This allowed us to understand interactions and feedbacks between microbial communities, their carbon sources, and water chemistry.