Mobile mud layer underneath the desiccated maar lake of Rincon de Parangueo and insights into its microbial fingerprints
Por:
Sanchez-Sanchez, Janet, Cerca, Mariano, Alcantara-Hernandez, Rocio J., Aranda-Gomez, Jose Jorge, Carreon-Freyre, Dora, Lozano-Flores, Carlos, Munoz-Velasco, Israel, Levresse, Gilles, Varela-Echavarria, Alfredo
Publicada:
1 dic 2021
Categoría:
Geology
Resumen:
We surveyed a subsurface layer of saturated mobile mud and its microbial
fingerprints below the desiccated bottom of a maar lake at Rincon de
Parangueo (RP), Mexico. A multi-scale approach was followed using
geological fieldwork, coring of the sediments, ground penetrating radar
survey, physico-chemical characterization including X-ray diffraction
and scanning electron microscope, and high-throughput DNA sequencing
methods. The mobile mud is an organic-rich silty clay, with high values
of alkalinity, volumetric water content and conductivity. Mud mobility
has been attributed to overpressure caused by disequilibrium compaction
of sediments related to active subsidence and pore overpressure produced
by an input of groundwater and gas content in the sediments and resulted
in a diverse set of structures related to mud tectonics such as
injection domes and fluid seeps through fractures. Extraction and
sequencing of sedimentary environmental DNA in the mud layer were
performed for Bacteria and Archaea. Despite the small number of samples
ob-tained, the microbial fingerprint from the sedimentary environmental
DNA at subsurface shares similarities with the microbial communi-ties
identified on the crater surface. Additionally, we identify the DNA of
specific methanogenic microorganisms in the mud, such as Bathyarchaeia,
Methanomassiliicoccales, and Methanobacteriales, and we speculate on
their probable role in gas production and pore overpressure in the mud
layer. The underground mud at Rincon de Parangueo represents a
geologically dynamic environment with conditions that are favorable for
the thriving of microbial communities.
Filiaciones:
Sanchez-Sanchez, Janet:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Posgrad Ciencias Tierra, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Cerca, Mariano:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Alcantara-Hernandez, Rocio J.:
Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ,Av Univ 3000, Mexico City 04510, DF, Mexico
Aranda-Gomez, Jose Jorge:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Carreon-Freyre, Dora:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Lozano-Flores, Carlos:
Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Biol Desarrollo & Neurofisiol, Queretaro, Mexico
Munoz-Velasco, Israel:
Univ Nacl Autonoma Mexico, Fac Ciencias, Apdo Postal 70-407,Cd Univ, Mexico City 04510, DF, Mexico
Levresse, Gilles:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Varela-Echavarria, Alfredo:
Univ Nacl Autonoma Mexico, Inst Neurobiol, Dept Biol Desarrollo & Neurofisiol, Queretaro, Mexico
All Open Access; Gold
|