Results 31 to 40 of about 189 (120)
Sedimentology, 2023 Abstract Better understanding the conditions of formation of authigenic Mg‐silicates and their reactivity is key to interpret the palaeoenvironmental message carried by the sedimentary record and evaluate the effect of reverse weathering, a process involved in long‐term climate evolution.
Muller, Elodie +10 more
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Estimation of the eddy diffusivity coefficient in a warm monomictic tropical Lake
Journal of Limnology, 2016 We used a two-year dataset (1998-1999) of monthly temperature profiles from Lake Alchichica, Mexico to estimate values of the vertical coefficient of eddy diffusivity.
David A. Salas de León +3 more
doaj +1 more source
Cyanobacterial calcification in modern microbialites at the submicrometer scale [PDF]
Biogeosciences, 2013 The search for microfossils in the geological record has been a long-term challenge. Part of the problem comes from the difficulty of identifying such microfossils unambiguously, since they can be morphologically confused with abiotic biomorphs.
E. Couradeau +6 more
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Identifying microbial life in rocks: Insights from population morphometry
Geobiology, Volume 18, Issue 3, Page 282-305, May 2020., 2020 Abstract The identification of cellular life in the rock record is problematic, since microbial life forms, and particularly bacteria, lack sufficient morphologic complexity to be effectively distinguished from certain abiogenic features in rocks. Examples include organic pore‐fillings, hydrocarbon‐containing fluid inclusions, organic coatings on ...
Joti Rouillard +7 more
wiley +1 more source
Journal of Limnology, 2012 Bacterial size and morphology are controlled by several factors including predation, viral lysis, UV radiation, and inorganic nutrients. We observed that bacterial biovolume from the hypolimnion of two oligotrophic lakes is larger than that of bacteria ...
Roberto Bertoni +3 more
doaj +1 more source
BIO 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 +1 more source
Genetic diversity associated with N-cycle pathways in microbialites from Lake Alchichica, Mexico [PDF]
Aquatic Microbial Ecology, 2017 Author(s): Alcantara-Hernandez, RJ; Valdespino-Castillo, PM; Centeno, CM; Alcocer, J; Merino-Ibarra, M; Falcon, LI | Abstract: Microbialites are an example of complex and diverse microbial assemblages where several metabolic pathways are interconnected for biomass formation coupled to mineral precipitation.
Alcántara-Hernández, RJ +5 more
openaire +3 more sources
Water, 2022 The phytoplankton biomass (chlorophyll-a, Chl-a) is directly related to the total production of lakes. Chl-a in temperate lakes oscillates on an annual scale. However, Chl-a oscillations in tropical lakes have hardly been documented, particularly over multiple years.
Javier Alcocer +4 more
openaire +1 more source
Ciliate food vacuole content and bacterial community composition in the warm-monomictic crater Lake Alchichica, México [PDF]
FEMS Microbiology Ecology, 2011 To evaluate trophic relationships between ciliates and bacterioplankton during the stratification period in a lake, samples from three different layers [the upper part of the metalimnion (UM), the base of the metalimnion (BM) and the hypolimnion] were studied. The autotrophic picoplankton numbers, phylogenetic composition of heterotrophic picoplankton (
Fernando, Bautista-Reyes +1 more
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Long term picoplankton dynamics in a warm-monomictic, tropical high altitude lake
Journal of Limnology, 2009 Long term analyses of the microbial loop, centred on the picoplankton dynamics, were carried out over a five-year (1998 to 2002) period in Lake Alchichica (Puebla, Mexico), a high altitude tropical athalassohaline lake.
Alfonso LUGO VÁZQUEZ +5 more
doaj +1 more source