Results 41 to 50 of about 5,114 (181)

Crustaceans in Phragmatopoma sp. (Polychaeta: Sabellariidae) intertidal reefs, Pacific, Costa Rica

Cuadernos de investigación UNED, 2023
Introduction: Annelid polychaete worms of the family Sabellariidae build reefs by cementing together sand grains. These reefs increase local habitat heterogeneity and species diversity.
José A. Vargas, Rita Vargas-Castillo, Jeffrey A. Sibaja-Cordero   +2 more
doaj   +1 more source

Spatial and Temporal Variability of Eastern Pacific Radiocarbon and Carbon Chemistry From the Ice Age to Today

Paleoceanography and Paleoclimatology, Volume 41, Issue 5, May 2026.
Abstract Proxy records of seawater radiocarbon (14C/C) provide strong constraints on how changes in ocean ventilation contributed to the increase in atmospheric CO2 during the termination of the last ice age (≈18,000‐to‐12,000 years ago). One outstanding problem, however, is the existence of anomalously low deglacial benthic foraminiferal 14C/C in the ...
Patrick A. Rafter, Mathis P. Hain, Elsa Arellano‐Torres, Kaustubh Thirumalai, Eric J. Tappa, Maria L. Machain‐Castillo, Martin Soto‐Jimenez, Tim DeVries, Ingrid L. Hendy, Juan C. Herguera, William R. Gray, Ryan A. Green, Frank Pavia, James W. B. Rae, John R. Southon   +14 more
wiley   +1 more source

Estado del arte del conocimiento sobre perifiton en Colombia

Gestión y Ambiente, 2013
El perifiton es un componente de las comunidades bióticas acuáticas, su estudio es importante tanto desde la perspectiva ecológica, para comprender el funcionamiento de los ecosistemas acuáticos, como desde el punto de vista ambiental, pues su ...
Yimmy Montoya Moreno, Nestor Aguirre
doaj   +2 more sources

Caracterización morfométrica de la microcuenca de la quebrada los Andes, El Carmen de Viboral, Antioquia-Colombia Morphometrical characterization in los Andes watershed, El Carmen de Viboral, Antioquia-Colombia

Revista Ingenierías Universidad de Medellín, 2009
Se evaluaron algunas características morfométricas básicas en la microcuenca de la quebrada Los Andes en el departamento de Antioquia (Colombia).
Yimmy Montoya Moreno, Boris Montoya Moreno   +1 more
doaj  

Variability of Zooplankton in Two Neighboring Tropical High-Mountain Lakes

Diversity
High-mountain lakes (HMLs) El Sol and La Luna are located 600 m apart in the crater of the Nevado de Toluca volcano, yet they display distinct differences in their morphometry and limnology.
Javier Alcocer, Rocío Fernández, Luis A. Oseguera   +2 more
doaj   +1 more source

Ictiólogos de la Argentina : Raúl Adolfo Ringuelet [PDF]

, 2004
Fil: López, Hugo Luis. División Zoología Vertebrados; Facultad de Ciencias Naturales y Museo; Universidad Nacional de La PlataFil: Ponte Gómez, Justina.
E. D. Feigelson, N. Grosso, T. G. Forbes, T. Montmerle   +3 more
core   +2 more sources

Temporal and vertical variations in phythoplankton community structure and its relation to some morphometric parameters of four Colombian reservoirs Temporal and vertical variations in phythoplankton community structure and its relation to some morphometric parameters of four Colombian reservoirs

Caldasia, 2000
Phytoplankton samples were taken at three depths within the photie zone of eaeh of four reservoirs, Punehiná, Las Playas, El Peñol and San Lorenzo loeated in Antioquia department, Colombia.
Ramírez R. John J., Bicudo Carlos Eduardo de Mattos, Roldán P. G., García L. L. C.   +3 more
doaj  

Density, size, and biomass of Diadema mexicanum (Echinoidea) in Eastern Tropical Pacific coral reefs

Aquatic Biology, 2016
Diadema is among the most abundant, widely dispersed, and ecologically important genera of sea urchin in tropical shallow waters. D. mexicanum is distributed from the Gulf of California to northern Peru, including the oceanic islands of Revillagigedo ...
JJ Alvarado, J Cortés, H Guzman, H Reyes-Bonilla   +3 more
doaj   +1 more source

Claves para la identificación de los peces de las aguas continentales e insulares de Costa Rica. Parte II: Cichliformes, Cichlidae (Mojarras, Guapotes, Tilapias y afines)

Cuadernos de investigación UNED, 2022
Introducción: Los cíclidos (Cichlidae, Cichliformes) constituyen una de las familias de peces dulceacuícolas más diversas en el planeta. En Costa Rica cerca de un 10% del total de las especies conocidas pertenecen a este grupo.
Arturo Angulo, Jorge San Gil León
doaj   +1 more source

Climate change and El Niño Southern Oscillation influence on mixing regime and water quality in a deep tropical mountain lake

Limnology and Oceanography Letters, Volume 11, Issue 2, March 2026.
Abstract Climate change alters lake functioning, water quality, and aquatic biota; yet our understanding of this process is poor for deep tropical mountain lakes. A 15‐yr dataset (2010–2024) from Lake Atitlán, Guatemala, revealed climate change impacts on a tropical lake ecosystem and showed a warming trend of 0.34 ± 0.14°C per decade that intensified ...
Ovidio García‐Oliva, Margaret A. Dix, Mónica M. Martínez‐Fausto, Juan Estuardo Bocel, Jorge Garcia‐Polo, Natalia Vargas‐López, Fátima Reyes Morales, Sharon van Tuylen, Michael W. Dix   +8 more
wiley   +1 more source