NDLI: Diversity of culturable thermo-resistant aquatic bacteria along an environmental gradient in Cuatro Ciénegas, Coahuila, México

Content Provider	Springer Nature Link
Author	Cerritos, René Eguiarte, Luis E. Avitia, Morena Siefert, Janet Travisa, Michael Rodríguez Verdugo, Alejandra Souza, Valeria
Copyright Year	2010
Abstract	At the desert oasis of Cuatro Ciénegas in Coahuila, México, more than 300 oligotrophic pools can be found and a large number of endemic species of plants and animals. The most divergent taxa of diatoms, snail and fishes are located in the Churince hydrological system, where we analyzed the local diversification of cultivable Firmicutes and Actinobacteria. The Churince hydrological system is surrounded by gypsum dunes and has a strong gradient for salinity, temperature, pH and dissolved oxygen. In August 2003, surface water samples were taken in 10 sites along the Churince system together with the respective environmental measurements. 417 thermo-resistant bacteria were isolated and DNA was extracted to obtain their BOX-PCR fingerprints, revealing 55 different patterns. In order to identify similarities and differences in the diversity of the various sampling sites, an Ordination Analysis was applied using Principal Component Analysis. This analysis showed that conductivity is the environmental factor that explains the distribution of most of the microbial diversity. Phylogenetic reconstruction from their 16S rRNA sequences was performed for a sample of 150 isolates. Only 17 sequences had a 100% match in the Gene Bank (NCBI), representing 10 well known cosmopolitan taxa. The rest of the sequences cluster in 22 clades for Firmicutes and another 22 clades for Actinobacteria, supporting the idea of high diversity and differentiation for this site.
Starting Page	303
Ending Page	318
Page Count	16
File Format	PDF
ISSN	00036072
Journal	Antonie van Leeuwenhoek
Volume Number	99
Issue Number	2
e-ISSN	15729699
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-08-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Actinobacteria Bacillus Bacterial diversity Churince Desert Firmicutes Local diversification México Medical Microbiology Soil Science & Conservation Plant Sciences Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Microbiology

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