publication . Doctoral thesis . 2004

Carbon cycling and calcification in hypersaline microbial mats

Ludwig, Rebecca;
Open Access English
  • Published: 01 Jan 2004
Abstract
Phototrophic microbial mats are laminated aggregations of microorganisms that thrive in extreme and oligotrophic environments. Primary production rates by oxygenic phototrophs are extremely high. Primary producers supply heterotrophic mat members with organic carbon, which in turn regenerate CO2 needed for autotrophic carbon fixation. Another potential source of CO2 is calcification, which is known to shift the carbonate equilibrium towards CO2. This thesis investigated the carbon cycle of microbial mats and stromatolitic oncolites, with special emphasis on oxygenic photosynthesis and calcification. Microbial mats from 'La Salada de Chiprana', which were used fo...
Subjects
free text keywords: microbial mats, calcification, microelectrode, microsensor, Chiprana, Cuatro Cienegas, oxygen supersaturation, salinity, photosynthesis, cyanobacteria, Chloroflexus, nutrients, limitation, stromatolites, sulphate reduction, gas solubility, ddc:570
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