Results 31 to 40 of about 285 (134)

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, Juan Manuel García-Ruiz, Linda Kah, Emmanuelle Gérard, Laurie Barrier, Sami Nabhan, Jian Gong, Mark A. van Zuilen   +7 more
wiley   +1 more source

On the ecology of Cletocamptus gomezi Suárez-Morales, Barrera-Moreno & Ciros-Pérez 2013 (Crustacea, Copepoda, Harpacticoida) micro-endemic to Lake Alchichica, Central Mexico

Journal of Limnology, 2014
Cletocamptus gomezi Suárez-Morales, Barrera-Moreno & Ciros-Pérez (2013) is a recently described new species of meiobenthic Harpacticoida copepod, micro-endemic to Lake Alchichica, Puebla, Central Mexico. Cletocamptus gomezi lives in saline water (K25
Javier Alcocer, María del Carmen Hernández, Luis A. Oseguera, Elva Escobar   +3 more
doaj   +1 more source

Profundal benthic invertebrates in an oligotrophic tropical lake: different strategies for coping with anoxia

Journal of Limnology, 2014
The deep benthic communities of tropical lakes are poorly understood with respect to their composition, abundance, biomass and regulatory factors. Whereas the hypolimnia of temperate oligotrophic lakes remain oxygenated, the higher temperatures in ...
María del Carmen Hernández, Javier Alcocer, Luis A. Oseguera, Elva Escobar   +3 more
doaj   +1 more source

Ensamble de crustáceos bentónicos en un lago salino tropical

Revista 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, Elva Escobar Briones, Javier Alcocer   +2 more
doaj   +1 more source

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

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., Couradeau E., Gérard E., Tavera R., Lopez-Archilla A. I., Moreira D., Lopez-Garcia P.   +6 more
doaj   +1 more source

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, Javier Alcocer, Vilma Ardiles Gloria, Benjamín Quiroz-Martínez   +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, K. Benzerara, E. Gérard, I. Estève, D. Moreira, R. Tavera, P. López-García   +6 more
doaj   +1 more source

Hidrogeoquímica de salinas Zapotitlán y los lagos-cráter Alchichica y Atexcac, Puebla [PDF]

Idesia (Arica), 2014
In this study we carried on the experimental evaporation of brines from two saline crater-lakes: Alchichica and Atexcac, in the Basin of the Oriental, Puebla, and from a saline spring, Salinas Chiquitas, Zapotitlan, Puebla, thus documenting patterns of evolution to higher stages of concentration of solutions.
Mancilla Villa, Oscar Raúl, Bautista Olivas, Ana Laura, Ortega Escobar, Héctor Manuel, Sánchez Bernal, Edgar Iván, Can Chulim, Álvaro, Guevara Gutiérrez, Rubén Darío, Ortega Mikolaev, Ygor Manuel   +6 more
openaire   +2 more sources

Reappraising the eruptive history of the Alchichica Maar Volcano (Mexico) based on Sr–Nd isotopes: Understanding the role of the magma source region on the growth of small-volume volcanoes

Solid Earth Sciences
Alchichica Maar is in the eastern sector of the Trans-Mexican Volcanic Belt, where volcanics range from basalts to rhyolites, with 87Sr/86Sr and 143Nd/144Nd values between 0.70293 to 0.70447 (εSr = −21.1 to −4.5) and 0.512733 to 0.512949 (εNd = +3.4 to ...
Boris Chako-Tchamabé, Bodo Weber, Merlin Gountié Dedzo, Jules Tamen, Jhoanna Silis-Esquivel, Karoly Nemeth   +5 more
doaj   +1 more source

Inter-annual ciliate distribution variation within the late stratification oxycline in a monomictic lake, Lake Alchichica (Mexico)

Journal of Limnology, 2016
noxia, and ciliates might play a very important role in the plankton community budget there. We analysed changes in the composition and biomass of the ciliate assemblage and other microbial loop components throughout the oxycline just at the end of ...
Ximena Sánchez Medina, Miroslav Macek, Fernando Bautista-Reyes, Andrea Perz, Patricia Bonilla Lemus, Mario Chávez Arteaga   +5 more
doaj   +1 more source