Results 21 to 30 of about 285 (134)

Diversity and distribution of lacustrine diatoms along the Trans‐Mexican Volcanic Belt

Freshwater Biology, Volume 68, Issue 3, Page 391-405, March 2023., 2023
Abstract The Trans‐Mexican Volcanic Belt is recognised as a highly biodiverse zone and we present a study of diatom diversity and species distributions in its lakes. We aimed to identify diatom taxa with the highest regional occupancy, explore diversity at a regional level, identify the main variables associated with species distributions, and present ...
Avendaño Diana, Caballero Margarita, Vázquez Gabriela   +2 more
wiley   +1 more source

Late Pleistocene and Holocene palaeoecological reconstruction of Lake Texcoco (Basin of Mexico) based on its ostracod record

Journal of Quaternary Science, Volume 37, Issue 7, Page 1270-1279, October 2022., 2022
Abstract We present a palaeohydrological reconstruction of Lake Texcoco over the last 32.7 cal ka based on ostracod records consisting of two species, Candona patzcuaro and Limnocytherina axalapasco. Overall, the presence of these species suggests that Lake Texcoco was highly saline and experienced occasional desiccation periods.
C.M. Chávez‐Lara, S. Lozano‐García, B. Ortega‐Guerrero, M. Caballero‐Miranda   +3 more
wiley   +1 more source

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

Biogeosciences, 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, C. Thomazo, C. Thomazo, M. Iniesto, D. Jézéquel, D. Jézéquel, D. Moreira, R. Tavera, J. Caumartin, E. Muller, P. López-García, K. Benzerara   +11 more
doaj   +1 more source

Formation of Magnesium Carbonates on Earth and Implications for Mars

Journal 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, Carl Swindle, John Grotzinger, Holly Barnhart, Surjyendu Bhattacharjee, Bethany L. Ehlmann, Ken Farley, Woodward W. Fischer, Rebecca Greenberger, Miquela Ingalls, Peter E. Martin, Daniela Osorio‐Rodriguez, Ben P. Smith   +12 more
wiley   +1 more source

Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake

Journal of Limnology, 2014
The amount of biogenic carbon that may be deposited, buried and eventually preserved (sequestered) in the sediments of a tropical, oligotrophic lake, was evaluated based on i) the temporal variation of the particulate organic carbon (POC) concentration ...
Javier Alcocer, Ana C. Ruiz-Fernández, Elva Escobar, Libia H. Pérez-Bernal, Luis A. Oseguera, Vilma Ardiles-Gloria   +5 more
doaj   +1 more source

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

Diversity, 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, Alfonso Lugo, Rocío Fernández, Gloria Vilaclara, María Guadalupe Oliva, Luis A. Oseguera, Raúl A. Silva-Aguilera, Óscar Escolero   +7 more
doaj   +1 more source

Paleomagnetic estimation of emplacement temperature of pyroclastic deposits-preliminary study of caldera de los Humeros and Alchichica crater

Geofísica Internacional, 1983
Se reportan resultados paleomagnéticos de un estudio preliminar de depósitos piroclásticos de la caldera de Los Humeros y del cráter Alchichica. Los datos son analizados siguiendo un criterio simple de clasificaci6n que usa los resultados iniciales del ...
Jaime Urrutia Fucugauchi
doaj   +1 more source

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

FEMS 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, Rocio J, Alcántara-Hernández, Javier, Alcocer, Martín, Merino-Ibarra, Miroslav, Macek, Luisa I, Falcón   +5 more
openaire   +2 more sources

Hydrochemistry and microbialites of the alkaline crater lake Alchichica, Mexico [PDF]

Facies, 2011
The structure, mineralogy, and accretion processes of the modern and subfossil cyanobacterial microbialites from the alkaline crater lake Alchichica (Puebla, Mexico) were studied, along the lake’s bathymetry and hydrochemistry. The recent lowering of the lake level had exposed microbialitic carbonate mounds and crusts, which emerged up to 2 m above the
Kaźmierczak, Józef, Kempe, Stephan, Kremer, Barbara, López-García, Purificación, Moreira, David, Tavera, Rosaluz   +5 more
openaire   +1 more source

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

ISME 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, Ménez B, Couradeau E, Moreira D, Benzerara K, Tavera R, López-García P.   +6 more
europepmc   +4 more sources