Results 71 to 80 of about 309,027 (251)

Ecología y ocupación del espacio en los Andes tropicales durante los últimos veinte milenios

Bulletin de l’Institut français d’études andines, 1973
Les Andes tropicales sont constituées par un ensemble de facettes écologiques dont le nombre est fonction du volume montagneux, du régime thermique a la base, de la diversité des modelés, du stock floristique, des effets de façade et d'abri, des modalités d'utilisation de l'espace.
Dollfus, Olivier, Lavallée, Danièle
openaire   +2 more sources

El espacio geográfico de la américa del sur [PDF]

, 1974
Tectónica y grandes formas del relieve en el Continente: Las formas predominantes; La orogénesis y las formas del oriente; La red hidrográfica; Mesetas y montañas islas; La depresión pre-andina y las llanuras; Los Andes.
Guhl, Ernesto
core  

Tachinidae (Diptera) as Floral Visitors and Pollinators in Natural and Managed Systems

Entomologia Experimentalis et Applicata, EarlyView.
We review the roles of bristle flies (Tachinidae) as pollinators in natural and managed systems. We find that most tachinid genera visit flowers and that floral‐adapted mouthparts have evolved repeatedly many times in the family. We review patterns of floral specificity and assess the efficacy of tachinids as pollinators with case studies.
John O. Stireman III, Pierfilippo Cerretti   +1 more
wiley   +1 more source

Localización de embalses en cuencas de alta carga sedimentaria: el caso del río Bermejo, Argentina

Tecnología y ciencias del agua, 2010
La elección del emplazamiento de una presa en ambientes montañosos subtropicales y tropicales debe considerar ante todo la progresión de la colmatación esperable según la carga sólida que transporta un río.
Marcelo E. Lascano-Kezič
doaj   +1 more source

Wood Thrush (Hylocichla mustelina) occupancy patterns reveal sensitivity to low precipitation on nonbreeding grounds in northern Costa Rica

Ibis, EarlyView.
Climatic change and anthropogenic disturbances are reshaping animal populations. Habitat loss and extreme climatic events are particularly strong drivers of declines in species that depend on forested areas. For migratory songbirds, climate and the persistence of suitable habitat over time are fundamental to sustaining populations annually.
Isabel Vargas‐Valverde, Natalie V. Sánchez, Manuel Spínola, Gerardo Avalos   +3 more
wiley   +1 more source

Estructura genética de Euterpe precatoria (Mart.) en los Andes Tropicales.

, 2013
El estudio de los patrones geográficos de la diversidad genética de plantas es importante para el manejo y la conservación de las mismas. La relevancia de este tipo de estudios aumenta si la especie en cuestión es fuente de recursos para las poblaciones ...
Barreiro Sánchez, José Manuel
core   +2 more sources

Diversification and coexistence amid widespread and persistent gene flow in Andean trees

New Phytologist, EarlyView.
Andean Prunus species diversify into and occupy distinct elevation zones, remaining morphologically distinct. Yet, ancient introgression and recent admixture cross both phylogenetic and ecological distances. This suggests these species function as a long‐lived syngameon rather than fully isolated lineages, which may help explain how tree diversity ...
Ellen J. Quinlan, James B. Pease, Jhonatan Sallo Bravo, Alfredo F. Fuentes, William Farfan‐Rios, Miles R. Silman   +5 more
wiley   +1 more source

Mixed‐vertebrate pollination traits and pollinators of Haageocereus acranthus (Cactaceae) in a lomas desert ecosystem of coastal Peru

Plant Biology, EarlyView.
In a lomas desert ecosystem of coastal Peru, the columnar cactus Haageocereus acranthus shows traits and interactions consistent with a mixed‐vertebrate pollination system (hummingbirds and bats), with no detectable differences between flower colour morphotypes in either traits or interactions.
B. Garcia‐Simpson, B. A. Prado, J. J. Pellón, A. Valiente‐Banuet   +3 more
wiley   +1 more source

Prevalence of Plasmodium parasites in non-human primates and mosquitoes in areas with different degrees of fragmentation in Colombia

Malaria Journal, 2019
Background Parasites from the genus Plasmodium, the aetiological agent of malaria in humans, can also infect non-human primates (NHP), increasing the potential risk of zoonotic transmission with its associated global public health concerns.
Silvia Rondón, Cielo León, Andrés Link, Camila González   +3 more
doaj   +1 more source

Les Andes centrales tropicales vues par deux géographes : Isaiah Bowman et Carl Troll

Bulletin de l’Institut français d’études andines, 1978
Deux visions des Andes vues par deux géographes, Isaiah Bowman et Carl Troll, au caractère et au milieu intellectuel différents. L’auteur étudie dans l’un et l’autre cas la méthode d’analyse de l’espace géographique et les conclusions tirées par chacun d’eux. I.
openaire   +2 more sources