Results 51 to 60 of about 569 (166)

Acoplamiento pelágico-bentónico: respuesta de la zona bentónica profunda a la sedimentación del florecimiento invernal de diatomeas en el lago oligotrófico Alchichica, Puebla, México [PDF]

, 2017
El objetivo del presente estudio es reconocer la existencia de un acoplamiento pelágico–bentónico en el lago oligotrófico tropical Alchichica evaluando la respuesta de la zona bentónica profunda a la sedimentación del florecimiento invernal de diatomeas.
Alcocer, Javier, Oseguera, Luis A., Escobar, E   +2 more
core   +1 more source

Why bacteria are smaller in the epilimnion than in the hypolimnion? A hypothesis comparing temperate and tropical lakes

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, Cristiana Callieri, J. Salvador Hernandez-Aviles, Miroslav Macek   +3 more
doaj   +1 more source

Phylogenetic analysis and the recognition of a new genus for Mexican Crassulaceae segregated from Echeveria

TAXON, Volume 75, Issue 3, June 2026.
Abstract Systematic knowledge of the Mexican Crassulaceae is slowly progressing as data from new DNA regions and species sampling efforts increase. We compiled and generated new rbcL, matK, rps16, ITS/ITS2, and ETS DNA sequences and performed an updated phylogenetic reconstruction for a group of 131 Mexican Crassulaceae terminals from 11 of the 13 ...
Luis Emilio de la Cruz‐López, David Espinosa   +1 more
wiley   +1 more source

Coupled authigenic Mg silicate and carbonate precipitation in saline lakes of the Salar de Atacama, Northern Chile

The Depositional Record, Volume 12, Issue 1, February 2026.
Sediments, unlithified and lithified microbial mats in the Salar de Atacama, are formed by similar pathways involving coupled precipitation of authigenic Mg silicate and calcium carbonate. Differences in products reflect differences in the initial distribution of organic biomass.
Erica P. Suosaari, Christophe Dupraz, Amanda M. Oehlert, Ioan Lascu, Brooke E. Vitek, Alan M. Piggot, Alvaro T. Palma, R. Pamela Reid   +7 more
wiley   +1 more source

Formation of Mg‐silicates in the microbial sediments of a saline, mildly alkaline coastal lake (Lake Clifton, Australia): Environmental versus microbiological drivers

Sedimentology, Volume 72, Issue 5, Page 1518-1547, August 2025.
ABSTRACT Recent interest in Mg‐rich silicate formation stems from its role as a valuable palaeoclimatic indicator in fluvio‐lacustrine environments and its insights into metal geochemical cycling. Traditionally, Mg‐silicate genesis in lacustrine contexts is linked to alkaline or saline conditions in closed, evaporitic basins.
Ramon Mercedes‐Martín, Mónica Sánchez‐Román, Carlos Ayora, Mike Rogerson, Camille Thomas, Rob Van Spanning, Alex Brasier, David Wacey, John J. G. Reijmer   +8 more
wiley   +1 more source

Late Pleistocene–Holocene environmental fluctuations of southern Chihuahua Desert, Mexico

Journal of Quaternary Science, Volume 40, Issue 4, Page 634-644, May 2025.
ABSTRACT Paleoenvironmental reconstructions from the Mexican Chihuahua Desert based on biological proxies are scarce, creating a gap in our understanding of the ecological responses to climate change in this water‐scarce region. Here, we present a paleoenvironmental reconstruction based on geochemical data and biological proxies such as ostracods and ...
C. M. Chávez‐Lara, N. B. Palacios‐García, K. García‐Macedo, D. Ibarra‐Morales, M. Caballero   +4 more
wiley   +1 more source

Long-term picocyanobacteria development in an athalassohaline warm-monomictic Lake Alchichica: Virus- vs. ciliate-control?

, 2013
Autotrophic picoplankton (APP) was monitored regularly in Lake Alchichica (Puebla/Veracruz; Mexico) for nearly 10 years. In the present study, the control of APP development by viruses is analysed. The maximum cyanobacteria abundance was localised within
Miroslav Macek, Aramis E Florez Marquez, Jorge R Montiel Hernandez, Cristiana Callieri   +3 more
core   +3 more sources

Calcium carbonate and phosphorus interactions in inland waters

Limnology and Oceanography Letters, Volume 10, Issue 2, Page 158-178, April 2025.
Abstract Phosphorus, an element essential to all life, is impacted by calcium carbonate (CaCO3) co‐precipitation and dissolution dynamics across aquatic ecosystems. Changes to climate, hydrology, and eutrophication, coupled with differences in terminology related to naming CaCO3‐producing ecosystems (i.e., chalk, carbonate, karst, travertine), point to
Jessica R. Corman
wiley   +1 more source

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, Gloria VILACLARA FATJÓ, Laura PERALTA SORIANO, María Elena MARTÍNEZ-PÉREZ, Javier ALCOCER, Miroslav MACEK   +5 more
doaj   +1 more source

Spirostomum teres: A Long Term Study of an Anoxic-Hypolimnion Population Feeding upon Photosynthesizing Microorganisms

Acta Protozoologica, 2020
The pelagic / anoxic hypolimnion population of Spirostomum teres was investigated as a part of the long-term ciliates’ monitoring (2003–2016) in an oligo- to mesotrophic monomictic hyposaline crater ...
Miroslav Macek, Ximena Sánchez Medina, Antonio Picazo, Dana Peštová, Fernando Bautista Reyes, Jorge Ricardo Montiel Hernández, Javier Alcocer, Martín Merino Ibarra, Antonio Camacho   +8 more
doaj   +1 more source