Condiciones ambientales a finales del Estadio Isotópico 6 (EI 6: &gt; 130000 años) en el centro de México: caracterización de una sección de sedimentos laminados proveniente del Lago de Chalco

Avendaño-Villeda, Diana Angélica; Caballero, Margarita; Ortega‐Guerrero, Beatriz; Lozano‐García, Socorro; Brown, E. T.

doi:10.22201/cgeo.20072902e.2018.2.649

Cited by 17 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These elements are related to inputs of clastic sediments, mineral particles, and/or rock fragments that can be transported to the lake by wind or fluvial processes. Previous studies suggested profound changes in Lake Chalco since ~ 5,000 cal years BP 76 . Iron is considered a potentially harmful element (PHE), which may be indicative of human-mediated contamination.…”

Section: Resultsmentioning

confidence: 97%

“…S1 ), suggesting a higher trophic state during the warm hyposaline zone. Warm, hyposaline conditions are suggested by the presence of fossil diatoms Anomoeoneis costata , Craticula elkab, and Halamphora veneta 76 . We identified 32 unique Eukarya genera, among them 16 Streptophyta, 5 Chlorophyta, and some fungi and nematodes (Supplementary Table S5 ).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Moguel

Pérez

Alcaraz

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Metagenomic and traditional paleolimnological approaches are suitable to infer past biological and environmental changes, however, they are often applied independently, especially in tropical regions. We combined both approaches to investigate Holocene Prokaryote and Eukaryote diversity and microbial metabolic pathways in ancient Lake Chalco, Mexico. Here, we report on diversity among a large number of lineages (36,722 OTUs) and functional diversity (27,636,243 non-clustered predicted proteins, and 6,144 annotated protein-family genes). The most abundant domain is Bacteria (81%), followed by Archaea (15%) and Eukarya (3%). We also determined the diversity of protein families and their relationship to metabolic pathways. The early Holocene (> 11,000 cal years BP) lake was characterized by cool, freshwater conditions, which later became warmer and hyposaline (11,000–6,000 cal years BP). We found high abundances of cyanobacteria, and fungi groups associated with mature forests in these sediments. Bacteria and Archaea include mainly anaerobes and extremophiles that are involved in the sulfur, nitrogen, and carbon cycles. We found evidence for early human impacts, including landscape modifications and lake eutrophication, which began ~ 6,000 cal years BP. Subsaline, temperate conditions were inferred for the past 5,000 years. Finally, we found nitrogen-fixing bacteria and protein-family genes that are linked to contaminated environments, as well as several fungal pathogens of crops in near-surface sediments.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Moguel

Pérez

Alcaraz

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Muchos estudios geológicos y geofísicos han sido realizados dentro de la cuenca de México con el objetivo de conocer su estratigrafía, geología estructural y tectónica (Fries, 1956(Fries, , 1960Mooser, 1963Mooser, , 1975de Cserna et al, 1988;García-Palomo et al, 2008;Arce et al, 2019). Así mismo, se han hecho diversos estudios geológicos de detalle en las principales sierras que rodean a la cuenca de México (Osete et al, 2000;Arce et al, 2008;García-Palomo et al, 2008;Cadoux et al, 2011;Macias et al, 2012) y en el paquete fluvio-volcano-lacustre del Pleistoceno tardío-Holoceno (Avendaño-Villeda et al, 2018Martínez-Abarca et al, 2019. Los datos obtenidos del paquete fluvio-volcano-lacustre han aportado datos valiosos de la estratigrafía más superficial y de las condiciones paleoambiantales de la cuenca de México (Lozano-García et al, 1993;Lozano-García y Ortega-Guerrero, 1998;Brown et al, 2012;Avendaño-Villeda et al, 2018Martínez-Abarca et al, 2019.…”

Section: Marco Geológicounclassified

Arreglo de fracturas geológicas en rocas miocénicas de la cuenca de México

Vásquez-Serrano¹,

Arce-Saldaña²,

Rangel-Granados³

et al. 2021

revmexcg

View full text Add to dashboard Cite

El estudio del arreglo de las fracturas es importante para el conocimiento del flujo de fluidos y tiene una amplia aplicación en áreas como: estabilidad de taludes, campos geotérmicos, acuíferos profundos y exploración de hidrocarburos. El arreglo de las fracturas es una característica fundamental de la distribución espacial de las fracturas, aunque su relación con el tipo de roca, fallas kilométricas y herencia estructural es poco conocida. La influencia de estas variables en el arreglo de las fracturas es explorada en este trabajo mediante un estudio detallado de fracturas en rocas miocénicas de la cuenca de México. Las rocas miocénicas en la cuenca de México están afectadas por tres sistemas de fracturas que tienen una orientación NE-SW, NNW-SSE y ~E-W. Las tres familias de fracturas se presentan con un arreglo en forma de grupos de fracturas, donde el grado de agrupamiento está relacionado con el tipo de roca que constituye la sucesión volcánica del Mioceno (lavas y depósitos volcaniclásticos). Adicionalmente, la intensidad de fracturas es mayor en las lavas y menor en los depósitos volcaniclásticos, y tiene una relación inversa con el grado de agrupamiento. La familia F1 (NE-SW) tiene un arreglo de fracturas que se pueden caracterizar con una distribución fractal a escala de metros. Mientras que las fracturas F2 (NNW-SSE) presentan un arreglo que se asocian con anisotropías mecánicas en rocas pre-miocénicas. Este fenómeno probablemente está relacionado con una herencia estructural y/o reactivación de estructuras. Finalmente, las fracturas F3 (~E-W) forman un arreglo que se puede asociar con una distribución espacial aleatoria.

show abstract

“…Varios estudios paleoecológicos se han realizado en distintas secuencias lacustres perforadas en el lago de Chalco con el propósito de reconstruir la historia climática y ambiental del Pleistoceno tardío y Holoceno (Caballero y Ortega-Guerrero, 1998;Caballero et al, 2010;Lozano-García et al, 2015;Torres-Rodríguez et al, 2015, Avendaño-Villeda et al, 2018. Diversos eventos volcánicos han sido reconocidos en los depósitos lacustres de Chalco (Caballero y Ortega-Guerrero,…”

Section: Fisiografía Y Actividad Volcánicaunclassified

Fires and volcanic activity: History of fire in the Mexico basin during late Pleistocene based on carbonized material records in the Chalco lake

et al. 2019

Self Cite

View full text Add to dashboard Cite

Forest fires, considered as free and not programmed fire propagation, are perturbations that greatly alter ecosystems. During fires, variable quantities of charcoal particles are produced by the burning vegetation, which can be later deposited in lacustrine basins. The traditional charcoal size particle model associates the > 100 µm primary particles to local fire events, within the watershed, and the < 100 µm particles are linked to regional fire events, outside the watershed. Fires can be related with favorable climatic conditions, but in tectonically active areas like the basin of Mexico, volcanism can also be a factor producing fires and charcoal particles. We document the history, intensity and frequency of fires recorded in the lacustrine sediments of lake Chalco (core CHAVII-11), by performing a high-resolution charcoal particle analysis in sediments deposited before and after three main volcanic events. The sources of these events had different distances to lake Chalco: Tláhuac tephra (TTH; 28690 years cal BP), probably produced by the Teuhtli volcano, was a local event; the Tutti Frutti Pumice (PTF; 17000 years cal BP) produced by the Popocatépetl volcano, was an extra-local event and the Upper Toluca Pumice (PTS; 12300 years cal BP) produced by the Nevado de Toluca volcano, was a regional event. Charcoal accumulation rates (CHAR) and distribution of size particles indicate that paleoclimate was a direct factor defining the intensity and recurrence of fires before and after volcanic activity, as climate defines vegetation type and density, and therefore fuel availability. Fires before and after the TTH were frequent, local and intense in comparison with fires reconstructed before or after the PTF and PTS events. CHAR values were lower during the more widespread PTF event, than for the local TTH event, although the highest CHAR values were recorded for the most distant, regional, and intense PTS event. These results show that charcoal accumulation rates during the volcanic events in central Mexico cannot be interpreted following traditional model of charcoal particle dispersion. This model have important restrictions in active volcanic regions such as central Mexico.

show abstract

Condiciones ambientales a finales del Estadio Isotópico 6 (EI 6: > 130000 años) en el centro de México: caracterización de una sección de sedimentos laminados proveniente del Lago de Chalco

Cited by 17 publications

References 28 publications

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Holocene life and microbiome profiling in ancient tropical Lake Chalco, Mexico

Arreglo de fracturas geológicas en rocas miocénicas de la cuenca de México

Fires and volcanic activity: History of fire in the Mexico basin during late Pleistocene based on carbonized material records in the Chalco lake

Contact Info

Product

Resources

About