Results 11 to 20 of about 539 (132)

Shifts in water column microbial composition associated to lakes with different trophic conditions: “Lagunas de Montebello” National Park, Chiapas, México [PDF]

PeerJ, 2022
Eutrophication is a global problem causing the reduction of water quality and the loss of ecosystem goods and services. The lakes of the “Lagunas de Montebello” National Park (LMNP), Chiapas, Mexico, not only represent unique and beautiful natural scenic
Alfredo Yanez-Montalvo, Bernardo Aguila, Elizabeth Selene Gómez-Acata, Miriam Guerrero-Jacinto, Luis A. Oseguera, Luisa I. Falcón, Javier Alcocer   +6 more
doaj   +2 more sources

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

Claves para la identificación de los peces de las aguas continentales e insulares de Costa Rica. Parte I: Familias

Cuadernos de investigación UNED, 2021
Introducción: El conocimiento sobre la composición taxonómica de la fauna de peces de agua dulce de Costa Rica ha cambiado sustancialmente en las últimas dos décadas.
Arturo Angulo, Ana Rosa Ramírez Coghi, Myrna López Sánchez   +2 more
doaj   +1 more source

Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake

Journal of Limnology, 2014
The amount of biogenic carbon that may be deposited, buried and eventually preserved (sequestered) in the sediments of a tropical, oligotrophic lake, was evaluated based on i) the temporal variation of the particulate organic carbon (POC) concentration ...
Javier Alcocer, Ana C. Ruiz-Fernández, Elva Escobar, Libia H. Pérez-Bernal, Luis A. Oseguera, Vilma Ardiles-Gloria   +5 more
doaj   +1 more source

Regional Pelagic Rotifer Biodiversity in a Tropical Karst Lake District

Diversity, 2020
The species richness, composition, abundance, and biomass of pelagic rotifers were determined in 17 karst lakes of the “Lagunas de Montebello” National Park, Chiapas, Mexico. The species richness of the region (21 species) and single lakes (1–12 species)
Rocío Fernández, Javier Alcocer, Luis A. Oseguera   +2 more
doaj   +1 more source

Turnover Drives High Benthic Macroinvertebrates’ Beta Diversity in a Tropical Karstic Lake District

Diversity, 2022
Beta diversity is useful to explain community assembly across landscapes with spatial variation. Its turnover and nestedness components help explain how beta diversity is structured across environmental and spatial gradients.
Daniela Cortés-Guzmán, Javier Alcocer
doaj   +1 more source

Upwelling increases net primary production of corals and reef-wide gross primary production along the Pacific coast of Costa Rica

Frontiers in Marine Science, 2015
Photosynthetic production is a key ecosystem service provided by tropical coral reefs, but knowledge about the contribution of corals and other reef-associated organisms and the controlling environmental factors is scarce.
Ines eStuhldreier, Ines eStuhldreier, Celeste eSánchez-Noguera, Celeste eSánchez-Noguera, Florian eRoth, Florian eRoth, Jorge eCortés, Tim eRixen, Christian eWild, Christian eWild   +9 more
doaj   +1 more source

Habitat expansion of a tropical chironomid by seasonal alternation in use of littoral and profundal zones

Journal of Limnology, 2022
The consistent warming of tropical lakes at all depths causes rapid development and long persistence of seasonal hypoxia in the hypolimnion, which greatly reduces the biodiversity of hypolimnetic benthic invertebrates. Full mixing of the water column in
Javier Alcocer, William M. Lewis Jr., María del Carmen Hernández, Luis A. Oseguera, Vania J.J. Pérez, Narcís Prat   +5 more
doaj   +1 more source

Variation in cell densities and pigment concentrations of symbiotic dinoflagellates in the coral Pavona clavus in the eastern Pacific (Costa Rica)

Ciencias Marinas, 2008
The density and chlorophyll concentrations of symbiotic dinoflagellates (zooxanthellae) in the eastern Pacific coral Pavona clavus were monitored over the transitional period from rainy to dry season in a seasonal upwelling region and in a nonupwelling ...
S Sunagawa, J Cortés, C Jiménez, R Lara   +3 more
doaj   +1 more source

Responses of Benthic Macroinvertebrate Communities of Two Tropical, High-Mountain Lakes to Climate Change and Deacidification

Diversity, 2021
High-mountain lakes are among the most comparable ecosystems globally and recognized sentinels of global change. The present study pursued to identify how the benthic macroinvertebrates (BMI) communities of two tropical, high mountain lakes, El Sol and ...
Javier Alcocer, Luis A. Oseguera, Diana Ibarra-Morales, Elva Escobar, Lucero García-Cid   +4 more
doaj   +1 more source