Prokaryotic diversity across a pH gradient in the ``El Chichon'' crater-lake: a naturally thermo-acidic environment
Por:
Oswaldo Velazquez-Rios, Irving, Rincon-Rosales, Reiner, Antonio Gutierrez-Miceli, Federico, Alcantara-Hernandez, Rocio J., Manuel Ruiz-Valdiviezo, Victor
Publicada:
1 abr 2022
Resumen:
The ``El Chichon'' crater-lake in Mexico is a thermo-acidic
environment whose microorganisms have been scarcely studied. In this
study, we surveyed the prokaryotic communities by amplicon sequencing of
the 16S rRNA gene considering samples of sediment and water collected
within a pH/temperature gradient (pH 1.9-5.1, 38-89 degrees C). Further,
we interpreted these results within a physicochemical context. The
composition of the microbial assemblage differed significantly between
the sediments and water. Sediment communities were different in the site
with the highest temperature and lower pH value compared to the other
ones sampled, while those in the water were relatively similar at all
points. Most of the genera found were related to Alicyclobacillus,
Acinetobacter, Bacillus, Mesoaciditoga, Methanothermobacter,
Desulfitobacterium, Therminicanus, Kyrpidia, Paenibacillus,
Thermoanaerobacterium, and Gelria. Some of these genera are known by
their thermo-acidic tolerant capacities with flexible metabolisms to use
diverse electron donor/acceptors (S or Fe), while others are
thermo(acid)philes that mainly occur in the most extreme sites of the
lake. These results show the presence of a microbial community adapted
to the changing conditions of a very dynamic crater-lake, that include
chemoorganotrophs and chemolithotrophs.
Filiaciones:
Oswaldo Velazquez-Rios, Irving:
Tecnol Nacl Mexico, IT Tuxtla Gutierrez, Carretera Panamer Km 1080, Tuxtla Gutierrez 29050, Chiapas, Mexico
Rincon-Rosales, Reiner:
Tecnol Nacl Mexico, IT Tuxtla Gutierrez, Carretera Panamer Km 1080, Tuxtla Gutierrez 29050, Chiapas, Mexico
Antonio Gutierrez-Miceli, Federico:
Tecnol Nacl Mexico, IT Tuxtla Gutierrez, Carretera Panamer Km 1080, Tuxtla Gutierrez 29050, Chiapas, Mexico
Alcantara-Hernandez, Rocio J.:
Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ,Av Univ 3000, Mexico City 04510, DF, Mexico
Manuel Ruiz-Valdiviezo, Victor:
Tecnol Nacl Mexico, IT Tuxtla Gutierrez, Carretera Panamer Km 1080, Tuxtla Gutierrez 29050, Chiapas, Mexico
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