Results 21 to 30 of about 2,381 (208)

Effects of El Niño on the dynamics of Lake Alchichica, central Mexico

open access: yesGeofísica Internacional, 2003
Se presenta evidencia empírica que muestra los efectos contemporáneos del fenómeno El Niño Oscilación del Sur sobre Alchichica, un lago profundo, monomíctico cálido.
Javier Alcocer, Alfonso Lugo
doaj   +1 more source

“Localising Tropical Medicine”: A History of the Medical Research Institute (MRI) in Colonial Lagos, 1907–1920s

open access: yesModern Africa: Politics, History and Society, 2021
This article explores an early episode in the history of tropical medicine in colonial Lagos, British West Africa. It probes into the activities and outputs of scientists who operated within the Medical Research Institute (MRI) as a way to further complicate the agendas of tropical medicine.
openaire   +4 more sources

Serum calcium and its relationship with immunoglobulin G (IgG) levels in prepartum buffaloes from the Venezuelan humid tropics

open access: yesRevista Científica, 2023
The immune system partially recognizes specific antigens due to the role of calcium (Ca2+) as an intracellular second messenger that regulates the humoral immune response.
Juan Pablo Uzcátegui-Varela   +2 more
doaj   +1 more source

Spatial and temporal variation of Peridinium umbonatum F. Stein, 1883 (Dinophyceae) and its relationship with total phytoplankton of a shallow, oligotrophic lake in central Brazil (Lagoon Bonita, Distrito Federal) Variação especial e temporal de Peridinium umbonatum F. Stein, 1883 (Dinophyceae) e sua relação com o fitoplâncton total de uma lagoa rasa e oligotrófica no Brasil Central (Lagoa Bonita, Distrito Federal)

open access: yesActa Limnologica Brasiliensia, 2010
AIM: The main goal of this study was to investigate the temporal and spatial distribution of Peridinium umbonatum and its relationship with the physical and chemical water variables of the pelagic and littoral zones of Lagoon Bonita, located in Brasília,
Patrícia Pereira Gomes   +2 more
doaj   +1 more source

DISTRIBUCIÓN VERTICAL DE LA DIVERSIDAD BETA DE MACROINVERTEBRADOS EN UN LAGO OLIGOTRÓFICO DE ALTA MONTAÑA NEOTROPICAL

open access: yesActa Biológica Colombiana, 2023
Los componentes alfa (α) y beta (β) de la diversidad gamma (γ), y la partición de β en anidamiento y recambio, contribuyen a entender los factores que determinan la diversidad biológica.
Yimy Herrera-Martínez   +4 more
doaj   +1 more source

Lago Chad: qué se esconde tras la crisis de sus aguas

open access: yesRelaciones Internacionales, 2020
El lago Chad es un oasis en medio del desierto. Se trata de un lago tropical cuya cuenca activa se alimenta principalmente de las aguas del río Chari y de su afluente el río Logone. Cerca de cien millones de habitantes viven de sus aguas.
Silvia Alejandra Perazzo
doaj   +1 more source

Morfología funcional del fitoplancton en un lago de alta montaña tropical: Lago de Tota (Boyacá-Colombia)

open access: yesRevista de Biología Tropical, 2017
Functional morphology corresponds to adaptive responses to changes in the environment. In phytoplankton, traits such as the development of mucilage, oil vesicles, filaments and variation in the surface/volume ratio, allow algae to deal with sedimentation, optimizing light and nutrient uptake.
Muñoz-López, Claudia Liliana   +2 more
openaire   +3 more sources

Influence of seston quantity and quality on growth of tropical cladocerans Influência da quantidade e qualidade do séston sobre o crescimento de cladóceros tropicais

open access: yesBrazilian Journal of Biology, 2005
The seston of the small, shallow, and tropical lake Monte Alegre was tested for quantity and quality for cladocerans by growth bioassays, which were carried out in spring (Daphnia gessneri and Moina micrura), summer (D. gessneri, M. micrura, Ceriodaphnia
A. S Ferão-Filho   +2 more
doaj   +1 more source

Polycyclic Aromatic Hydrocarbon in Vegetables Grown on Contaminated Soils in a Sub-Saharan Tropical Environment – Lagos, Nigeria [PDF]

open access: yesPolycyclic Aromatic Compounds, 2018
Diet has been established as a major source of exposure to Polycyclic aromatic hydrocarbon for humans (PAHs) especially nonsmokers.
Adetunde, Oluwatoyin T.   +5 more
openaire   +2 more sources

Produtividade primária em um lago tropical raso brasileiro: experimentos no lago e em mesocosmos [PDF]

open access: yes, 2010
AIM: To evaluate the primary productivity of the phytoplankton in the Lake Monte Alegre, southeastern Brazil, and the factors that influence its fluctuations, experiments were carried out in the lake and in mesocosm; METHODS: Primary productivity rates ...
ESGUÍCERO, André Luiz Henríques   +3 more
core   +1 more source

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