Results 41 to 50 of about 23,933 (167)

Assembling the Neotropical Tree Flora: Andean Uplift and the Historical Biogeography of the Brazil Nut Family (Lecythidaceae)

open access: yesJournal of Biogeography, Volume 53, Issue 4, April 2026.
ABSTRACT Aim The assembly of tropical tree floras is complex, involving many lineage‐specific histories; however, focusing on the biogeographic history of diverse clades can reveal general patterns. We investigated the historical biogeography of the ecologically important Brazil nut clade (Lecythidoideae) to: (1) expand prior phylogenies with greater ...
Diana Medellín‐Zabala   +8 more
wiley   +1 more source

Soil Quality Restoration during the Natural Succession of Abandoned Cattle Pastures in Deforested Landscapes in the Colombian Amazon

open access: yesAgronomy, 2021
Successional processes in abandoned pastures in the Amazon region have been well-documented for the floristic component; however, soil succession has been poorly studied. This study assessed the physical, chemical and biological responses of soils in the
Carlos H. Rodríguez-León   +6 more
doaj   +1 more source

A new species of Anastrepha from Amazonia : with redescriptions of A. caudata Stone and A. hendeliana Lima (Diptera: Tephritidae) [PDF]

open access: yes, 2003
Three species of Anastrepha from upper Amazonia are described or redescribed and illustrated. They are considered closely related and are placed in the A. caudata species group. Anastrepha caudata Stone 1942 is redescribed based on the holotype, the only
Caraballo, Josefina, Norrbom, Allen L.
core  

Multidimensional Perspective on the Quality of Green Onion: Between the Visible, the Measurable, and the Perceived

open access: yesFood Science &Nutrition, Volume 14, Issue 2, February 2026.
This graphical abstract presents a five‐phase framework to define green onion quality by integrating literature evidence, physicochemical and bioactive data, digital trends, field damage observations, and consumer perception, providing a multidimensional and measurable quality assessment.
Leslie Walessa Castaño‐Tarazona   +2 more
wiley   +1 more source

New distribution record for Chelyocarpus ulei Dammer (Arecales: Arecaceae) in Colombia [PDF]

open access: yesCheck List, 2015
The known range of Chelyocarpus ulei is extended 430 km to the north, in Caquetá, Colombia. The new locality represents the northwestern most limit of the species’ range, collected at the municipalities of Florencia, Caquetá, Colombia.
William Calderón   +2 more
doaj   +3 more sources

A geography of illicit crops (coca leaf) and armed conflict in Colombia [PDF]

open access: yes, 2004
Colombia is currently the world’s largest producer of coca leaf and the principal producer of opium poppies in the Americas; the plants are the basic raw materials used to produce cocaine and heroin.
Díaz, Ana María, Sánchez, Fabio
core  

Strong Variation in Land‐Use Change Impacts on Tropical Avian Phylogenetic Diversity Between Ecoregions Highlights the Need to Sample Large Spatial Scales

open access: yesGlobal Change Biology, Volume 32, Issue 1, January 2026.
Forest conversion for agriculture is a major cause of biodiversity loss in the tropics, but its impacts depend on how broadly they are measured. Using data from across Colombia, one of the most biodiverse countries in the world, we examined how deforestation for cattle farming affects the evolutionary history of bird species.
Giovanny Pérez   +7 more
wiley   +1 more source

Caracterización molecular de una población de ganado Caqueteño y su relación filogenética con razas bovinas criollas colombianas

open access: yesCiencia y Tecnología Agropecuaria, 2006
El objetivo fue determinar si una población de la raza bovina criolla Caqueteño (CAQ) representa una agrupación racial diferente de las demás poblaciones criollas bovinas colombianas. A tal fin se realizó extracción de ADN a partir de muestras de sangre
Gloria Patricia Barrera   +3 more
doaj   +1 more source

¿Por qué se pierde la agrobiodiversidad?: caso de la chagra inga en la Amazonía colombiana [PDF]

open access: yes, 2020
En esta investigación se analizaron las causas sociales, ambientales y económicas que inciden en la pérdida de agrobiodiversidad de las chagras del pueblo indígena Inga en la Amazonía colombiana.
Escarraga Torres, Laura Judith   +4 more
core   +1 more source

Screening of Grasses’ Chemical Composition Variability and Methane Emissions in Colombian Livestock Ecoregions Using Digital Bromatology

open access: yesInternational Journal of Agronomy, Volume 2026, Issue 1, 2026.
Grasses’ nutritional characteristics and management are fundamental for grazing cattle to guarantee sustainability in tropical conditions. This study aims to analyze the pastures’ chemical composition variability and methane emissions in different Colombian ecoregions and productive activities using digital bromatology data.
Mauricio Vélez-Terranova   +6 more
wiley   +1 more source

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