Results 71 to 80 of about 44,311 (140)
Hummingbird pollination is a hallmark of American plant diversity and has long been thought to evolve in tropical mountains due to declining bee activity. Using sister species of Costus specialized on bees (C. kuntzei) and hummingbirds (C. wilsonii), we show that this shift is not driven by reduced bee visitation with elevation, but by greater ...
Pedro Juárez +7 more
wiley +1 more source
Natural Arabidopsis thaliana accessions showed remarkable plasticity in both life‐cycle phenology and whole‐genome gene expression patterns in in natura field experiments. Nevertheless, local adaptation in fitness‐related life‐history traits can also be detected at the whole‐genome gene expression level.
A. Martínez‐Pérez +8 more
wiley +1 more source
Species of Pentatomidae are cytogenetically characterized by the presence of holokinetic chromosomes, a pre-reductional type of meiosis, and a great constancy not only in chromosome number (2n = 14 in 85% of the 250 species analyzed) but also in the sex ...
Pablo J. REBAGLIATI +2 more
doaj +1 more source
Este artÃculo empieza con una paradoja. Los modelos de negocio normalmente se asocian con cambio – especialmente cambio radical – pero a menudo el concepto se utiliza de forma estática para describir el modelo de negocio de una empresa. Después de aportar nuestra definición de modelo de negocio como combinación de recursos y competencias ...
openaire +1 more source
Este trabajo analiza la evolución de la estrategia corporativa y la estructura organizativa de 100 de los mayores grupos empresariales españoles durante el perÃodo 1993-2003, con el fin de ofrecer una comparación con otros contextos. Los resultados muestran que la tendencia es similar a la observada en Europa, aunque en España todavÃa es menos ...
openaire +1 more source
Se registra por primera vez al colibrí aliazul (Pterophanes cyanopterus) en el departamento de Antioquia, en dos localidades del municipio de Sonsón (Cerro Las Palomas y Cerro La Vieja) ampliando la distribución de la especie 66 km hacia el norte en la ...
Sergio Chaparro-Herrera +3 more
doaj +1 more source
Background The emergence of pyrethroid resistance has threatened the elimination of Triatoma infestans from the Gran Chaco ecoregion. We investigated the status and spatial distribution of house infestation with T.
María Carla Cecere +8 more
doaj +1 more source
Bark beetle, Dendroctonus rhizophagus, colonises and kills healthy sapling pine trees in the Sierra Madre Occidental, Mexico. In the autumn, its fifth-instar larvae migrate to the host’s roots (hibernaculum) to overwinter; however, little is known about ...
Moises Becerril +6 more
doaj +1 more source
Introducción y objetivos El género Acacia (Fabaceae) es de distribución pantropical y actualmente está compuesto por, aproximadamente, 1.450 especies en todo el mundo.
Carolina Luciana Pometti +2 more
doaj
The longstanding debate over early hominin subsistence strategies, particularly the hunting-versus-scavenging hypothesis, as well as discussions regarding the functionality of Oldowan sites, has been primarily centered on the archeological and ...
Blanca Jiménez-García +3 more
doaj +1 more source

