Results 41 to 50 of about 892 (188)

Fission track thermochronology of Neogene plutons in the Principal Andean Cordillera of central Chile (33-35°S): Implications for tectonic evolution and porphyry Cu-Mo mineralization Termocronología mediante trazas de fision de plutones neógenos en la Cordillera Principal Andina de Chile central (33-35°S): Implicancias para la evolución tectónica y mineralización de pórfidos de Cu-Mo

Andean Geology, 2009
Apatite fission track data for Miocene plutons of the western slope of the Principal Andean Cordillera in central Chile (33-35°S) define a distinct episode of enhanced crustal cooling through the temperature range of the apatite partial annealing zone ...
Víctor Maksaev, Francisco Munizaga, Marcos Zentilli, Reynaldo Charrier   +3 more
doaj  

Cascading effects of glacier retreat: Hydro-chemical shifts and macroinvertebrate responses in Andean glacier-fed streams [PDF]

Journal of the Bulgarian Geographical Society
The retreat of tropical glaciers in the Peruvian Andes, particularly in the Cordillera Blanca, has significantly altered hydrogeological and geochemical processes in mountain water-sheds.
Fiorella La Matta Romero, Vanessa Arevalo-Seijas, David Valqui-Peña, Moya MacDonald, Jemma Wadham, Raul Loayza-Muro   +5 more
doaj   +3 more sources

Extensional stresses in the Colombian Eastern Cordillera fold-and-thrust belt (northern Andes): insights from 2D finite element modeling

Geologica Acta, 2009
Deformation and stress characteristics in the upper crust of the fold-and-thrust belt in the Colombian Eastern Cordillera were investigated by numerical analysis.
R. ISLAM, D. HAYASHI
doaj  

Fertilización y densidad de población en líneas de maíz en el noreste de México.

Agronomía Mesoamericana, 2016
Se estableció un ensayo de líneas de maíz (Zea mays L.) con diferentes niveles de N, P Y densidades de población. Se utilizó un diseño de parcelas divididas en bloques al azar en donde las líneas fueron la parcela principal mientras que la parcela ...
Juan Antonio Morales
doaj   +1 more source

Systematics of the Genus Hyalinaria Bethune‐Baker, 1910 (Lepidoptera: Psychidae) With Five New Species

Austral Entomology, Volume 65, Issue 3, August 2026.
ABSTRACT The Oiketicinae genus Hyalinaria Bethune‐Baker, 1910, is revised. The use of both morphological information and genetic sequence data indicates that Hyalinaria and Pseudoclania Bethune‐Baker, 1915 sp. nov., are synonymous, with the latter genus here treated as a junior subjective synonym of the former.
Ethan P. Beaver
wiley   +1 more source

Studies on Pygmy Grasshoppers: Bogotatettix Cadena‐Castañeda, García‐García & Tavares, gen. nov. (Orthoptera: Tetrigidae), a New Genus From the High Andean Forests and Páramos

Austral Entomology, Volume 65, Issue 3, August 2026.
ABSTRACT In this contribution to the study of pygmy grasshoppers, a new genus is described, which inhabits the high Andean forests and páramos surrounding the Bogotá Savannah, Colombia. Bogotattetix Cadena‐Castañeda, García‐García & Tavares, gen. nov. includes a new species, Bogotattetix chingazaensis Cadena‐Castañeda, García‐García & Tavares, sp. nov. 
Oscar J. Cadena‐Castañeda, Alexander García‐García, Ronald Fernando Quintana‐Arias, Juan Pablo Prias‐Sarmiento, Gustavo Costa Tavares   +4 more
wiley   +1 more source

Nectar Robbery by Native and Invasive Bumblebees Reduces Floral Rewards but Not Seed Production in Desfontainia fulgens

Ecology and Evolution, Volume 16, Issue 7, July 2026.
We evaluated nectar robbery by native and invasive bumblebees in the hummingbird‐pollinated shrub Desfontainia fulgens in southern Chile. Nectar robbery strongly reduced nectar standing crop and altered floral visitation patterns, but these proximate effects did not translate into reduced seed production under natural pollination conditions.
Carlos E. Valdivia, José I. Orellana
wiley   +1 more source

Sensitivity of Large‐Scale Hydrological Predictions to Precipitation Phase Partitioning Methods Under a Changing Climate

Hydrological Processes, Volume 40, Issue 7, July 2026.
Future warming shifts precipitation from snow to rain across the Saskatchewan River Basin, reducing snow water equivalent and advancing snowmelt timing. Differences among precipitation phase‐partitioning methods propagate from snowpack accumulation to runoff magnitude and timing, producing earlier spring flows and higher peak discharge.
Fuad Yassin, John W. Pomeroy, Alain Pietroniro, Bruce Davison, Mohamed Elshamy, Zelalem Tesemma   +5 more
wiley   +1 more source

Gamification as an Approach To Enhance Comprehension in Risk Elicitation: Experimental Evidence From Smallholder Farmers

Agricultural Economics, Volume 57, Issue 4, July 2026.
ABSTRACT Understanding risk attitudes is critical for agricultural development, as risk is ubiquitous in the lives of smallholder farmers. Accurate elicitation of risk attitudes is essential to analyze patterns and biases in decision‐making. Ensuring comprehension and attention in risk elicitation tasks is particularly important, as inattentiveness ...
Selina Bruns, Daniel Hermann, Oliver Musshoff   +2 more
wiley   +1 more source

Tropical Bee Assemblage Diversity Decreases With Elevation While Body Size Increases

Biotropica, Volume 58, Issue 4, July 2026.
Photos of bee specimens collected in the Colombian Andes across a nearly 3000 m elevational cline. They are arranged to illustrate both the decline in richness with elevation and the increase in community average body size with elevation. ABSTRACT Elevation gradients are powerful drivers of changes in species composition, richness, and functional ...
Nash E. Turley, Harold Pulido‐Guarín, Daniel Nossa‐Suárez, Gabriella Hoffmann, Ruben D. Martín‐Rojas, Lucia Aguilar‐Benavides, Margarita M. López‐Uribe   +6 more
wiley   +1 more source