A Microbial Mat Developed Around a Man-Made Geothermal Spring from Romania: Structure and Cyanobacterial Composition
Published:January 01, 2012
Cristian Coman, Bogdan Drugă, Adriana Bica, Lucian Barbu-Tudoran, Nicolae Dragoş, 2012. "A Microbial Mat Developed Around a Man-Made Geothermal Spring from Romania: Structure and Cyanobacterial Composition", Microbial Mats in Siliciclastic Depositional Systems Through Time, Nora Noffke, Henry Chafetz
Download citation file:
Even though they are small-scale ecosystems, microbial mats have greatly influenced the development of life on Earth. In order to put together a clear image of how life was on this planet billions of years ago, one has to look to fossils. To see how certain conditions influenced the development of the fossils it is very important to look for modern analogues that may have the potential to create sedimentary structures. Such a possible analogue is the cyanobacterial mat associated with the geothermal spring from Beltiug, Western Plain of Romania. The cyanobacterial diversity was explored by light and electron microscopy, alongside the following culture-independent techniques automated ribosomal intergenic spacer analysis and amplified ribosomal DNA (rDNA) restriction analysis, based on 16S rDNA and 16S-23S internal transcribed spacer markers. Based on the partial 16S rDNA sequences obtained, four cyanobacterial taxons were identified, all belonging to the Oscillatoriales order. Even though the mat started to develop only a few decades ago, its spatial structure and taxon composition are similar to those of modern or fossil sedimentary structures. These observations, coupled with the chemical properties of the water, rich in Ca2+ and HCO−2 make the Beltiug mat suitable for the appearance of sedimentary structures.
Figures & Tables
Microbial Mats in Siliciclastic Depositional Systems Through Time
The research field on microbial mats in siliciclastic environmental settings has greatly developed since its establishment by studies of pioneering scientists such as Gisela Gerdes, Wolfgang Krumbein, Jürgen Scheiber, David Bottjer and others. This SEPM Special Publication is the result of the SEPM Research Conference on Sandy Microbial Mats (modern and ancient), which was held in May 21-23, 2010 at Dinosaur Ridge, Denver, Colorado, USA. This volume presents peer reviewed individual case studies on microbial mats and on sedimentary structures (often called “microbially induced sedimentary structures-MISS”) that occur in modern and ancient marine and terrestrial environments. The conference brought together sedimentologists, microbiologists, and paleontologists from 30 countries and all five continents.