Results 41 to 50 of about 285 (134)

La vegetación acuática vascular de seis lagos-cráter del estado de Puebla, México

Botan‪ical Sciences, 1984
Las aguas de los seis lagos presentan una elevada concentración de sales y fueron divididos en dos grupos de acuerdo a la concentración de las mismas: el primero, denominado "concentrados" o "salinos'', formado por los lagos Alchichica y Atexcac y el ...
Pedro Ramírez-Gracía, Alejandro Novelo-R.   +1 more
doaj   +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

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

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

Tracing Groundwater‐Surface Water Interactions in a Volcanic Maar Lake Using Stable Isotopes and 222Rn

Journal of Geophysical Research: Biogeosciences, Volume 129, Issue 12, December 2024.
Abstract Isotope hydrological studies to understand groundwater‐surface water interactions in tropical, high‐elevation catchments are limited. These interactions are important in controlling lake water residence time, aqueous biogeochemistry, and water availability for downstream communities and ecosystems. To better comprehend the complexity of spatio‐
Germain Esquivel‐Hernández, Emanuel Montealegre‐Viales, Rolando Sánchez‐Gutiérrez, Mario Villalobos‐Forbes, Roy Pérez‐Salazar, Ricardo Sánchez‐Murillo, Leonardo Mena‐Rivera, Christian Birkel, Lucía Ortega   +8 more
wiley   +1 more source

Microbialites on the northern shelf of Lake Van, eastern Türkiye#: Morphology, texture, stable isotope geochemistry and age

Sedimentology, Volume 71, Issue 3, Page 850-870, April 2024.
ABSTRACT Lake Van, the world's largest alkaline lake, hosts some of the largest microbialite towers worldwide, which are considered as modern analogues of ancient stromatolites. This study investigates the links between microbialite evolution, geology, climate and hydrology, and the role of biotic and abiotic processes in microbialite growth and ...
M. Namık Çağatay, Emre Damcı, Germain Bayon, Mustafa Sarı   +3 more
wiley   +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

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

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, Valdespino-Castillo, PM, Centeno, CM, Alcocer, J, Merino-Ibarra, M, Falcón, LI   +5 more
openaire   +3 more sources