Results 31 to 40 of about 477 (162)

Geomicrobiological study of modern microbialites from Mexico: towards a better understanding of the ancient fossil record

open access: yesBIO Web of Conferences, 2014
Microbialites are sedimentary formations that are found throughout the geological record and are usually considered as one of the oldest traces of life on Earth.
Benzerara K.   +6 more
doaj   +3 more sources

Ensamble de crustáceos bentónicos en un lago salino tropical

open access: yesRevista Mexicana de Biodiversidad, 2010
El presente trabajo reconoce la composición, estructura y distribución espacial del ensamble de crustáceos bentónicos de Alchichica, un lago salino tropical ubicado en el extremo oriental del altiplano mexicano. El lago presenta una riqueza taxonómica de
Ma. del Carmen Hernández   +2 more
doaj   +3 more sources

A note on the effects of an individual large rainfall event on saline Lake Alchichica, Mexico

open access: yesEnvironmental Geology, 2007
The present study reports on perturbations of the water column by large rainfall at Lake Alchichica, a saline lake in Central Mexico. Alchichica is located in the "Llanos de San Juan," a high-altitude plateau with a minimum elevation of 2,300 m above sea
Alcocer, J., Filonov, A.E.
core   +2 more sources

Rapid formation of mature microbialites in Lake Alchichica, Mexico [PDF]

open access: yesEnvironmental Microbiology Reports, 2021
Summary Microbialites are emblematic sedimentary rocks formed by phylogenetically and metabolically complex microbial communities thriving under specific physicochemical conditions. Most microbialites are photosynthesis‐based ecosystems frequently formed by carbonates, thereby capturing inorganic carbon in the ...
Iniesto, Miguel   +6 more
openaire   +2 more sources

The hidden role of dissolved organic carbon in the biogeochemical cycle of carbon in modern redox-stratified lakes [PDF]

open access: yesBiogeosciences, 2023
The dissolved organic carbon (DOC) reservoir plays a critical role in the C cycle of marine and freshwater environments because of its size and implication in many biogeochemical reactions.
R. Havas   +11 more
doaj   +1 more source

Formation of Magnesium Carbonates on Earth and Implications for Mars

open access: yesJournal of Geophysical Research: Planets, Volume 126, Issue 7, July 2021., 2021
Abstract Magnesium carbonates have been identified within the landing site of the Perseverance rover mission. This study reviews terrestrial analog environments and textural, mineral assemblage, isotopic, and elemental analyses that have been applied to establish formation conditions of magnesium carbonates.
Eva L. Scheller   +12 more
wiley   +1 more source

20 Years of Global Change on the Limnology and Plankton of a Tropical, High-Altitude Lake

open access: yesDiversity, 2022
The present long-term (1993–2013) study was aimed at identifying the effects of global change on the environmental characteristics and the plankton community of the tropical, high-altitude Lake Alchichica, Puebla, Mexico.
Javier Alcocer   +7 more
doaj   +1 more source

Specific carbonate-microbe interactions in the modern microbialites of Lake Alchichica (Mexico). [PDF]

open access: yesISME J, 2013
Abstract The role of microorganisms in microbialite formation remains unresolved: do they induce mineral precipitation (microbes first) or do they colonize and/or entrap abiotic mineral precipitates (minerals first)? Does this role vary from one species to another? And what is the impact of mineral precipitation on microbial ecology?
Gérard E   +6 more
europepmc   +4 more sources

Alkaline phosphatases in microbialites and bacterioplankton from Alchichica soda lake, Mexico [PDF]

open access: yesFEMS Microbiology Ecology, 2014
Dissolved organic phosphorus utilization by different members of natural communities has been closely linked to microbial alkaline phosphatases whose affiliation and diversity is largely unknown. Here we assessed genetic diversity of bacterial alkaline phosphatases phoX and phoD, using highly diverse microbial consortia (microbialites and ...
Patricia M, Valdespino-Castillo   +5 more
openaire   +2 more sources

Description of Gloeomargarita lithophora gen. nov., sp. nov., a thylakoid-bearing, basal-branching cyanobacterium with intracellular carbonates, and proposal for Gloeomargaritales ord. nov. [PDF]

open access: yesInt J Syst Evol Microbiol, 2017
International audienceInternational Journal of Systematic and Evolutionary Microbiology Description of Gloeomargarita lithophora gen. nov., sp. nov., a thylakoid-bearing basal-branching cyanobacterium with intracellular carbonates, and proposal for ...
Moreira D   +9 more
europepmc   +2 more sources

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