Results 21 to 30 of about 1,190 (181)

Chemical Composition and Antibacterial Activity of the Essential Oil of [PDF]

Natural Product Communications, 2012
The essential oil of the leaves of Espeletia nana Cuatrec, obtained by hydrodistillation, was analyzed by GC-MS, which allowed the identification of 24 components, which made up 99.9% of the oil.
Alexis Peña, Luis Rojas, Rosa Aparicio, Libia Alarcón, José Gregorio Baptista, Judith Velasco, Juan Carmona, Alfredo Usubillaga   +7 more
doaj   +3 more sources

Estructura de dos comunidades de Espeletia grandiflora Kunth y Espeletia killipii Cuatr. Sobre laderas y valle del río Tunjo, Parque Nacional Natural Chingaza

Acta Biológica Colombiana, 2002
En el Parque Nacional Natural Chingaza, Cundinamarca, sitio de la quebrada de Piedras Gordas y valles y laderas del río Tunjo, se realizó un estudio de la estructura de dos comunidades vegetales pertenecientes a las especies dominantes de Espeletia ...
Silvio Zuluaga Ramírez
doaj   +2 more sources

Pollination ecology in the tropical Andes: moving towards a cross-scale approach. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Plant–pollinator interactions structure ecological communities and represent a key component of ecosystem functioning. Pollination networks are expected to be more diverse and specialised in the tropics, but pollination ecology in these regions has been understudied in comparison to other areas.
Rueda-Uribe C, Chautá A, Woodman TL, Lasso E, Pelayo RC, Manrique-Garzón LM, Muñoz MC, Allgayer R, Ashman TL, Bocedi G, Burslem DFRP, Camargo-Martínez PA, Echeverry-Galvis MÁ, González-Arango C, Gubry-Rangin C, Lancaster LT, Layton KKS, Manfredini F, Martel C, Montti L, Papadopulos AST, Raguso RA, Ready J, Rico-Guevara A, Rocabado C, Travis JMJ.   +25 more
europepmc   +2 more sources

Are We Witnessing a Speciation Continuum? Evidence From Current and Past Gene Flow in the Genus Oritrophium s.s. (Asteraceae) From the Tropical High Andes. [PDF]

Mol Ecol
ABSTRACT Determining species boundaries is key for appropriately assessing biodiversity. However, the continuity of the speciation process makes delimiting species a difficult task, especially for recently diverged taxa. Furthermore, past introgression may leave traces that result in reticulate evolutionary patterns, challenging the estimation of ...
Gorospe JM, Salomón L, Armijos-Barros J, Kantor A, Kolář F, Arnelas I, Sklenář P, Schmickl R.   +7 more
europepmc   +2 more sources

Evidence of introgression amid phylogenetic conflict in Brachyotum, a plant radiation from the Tropical Andes. [PDF]

Am J Bot
Abstract Premise The species‐rich flora of Tropical Andes underwent multiple rapid and recent diversifications, yet resolving their evolutionary histories remains challenging despite increasing phylogenomic data. Here, we examined phylogenomic conflict in Brachyotum (Melastomataceae) to identify sources preventing its resolution.
Paredes-Burneo D, Bedoya AM, Michelangeli FA, Majure LC, Ulloa Ulloa C, Lagomarsino LP.   +5 more
europepmc   +2 more sources

Tracking Small Animals in Complex Landscapes: A Comparison of Localisation Workflows for Automated Radio Telemetry Systems. [PDF]

Ecol Evol
Automated radio telemetry grids provide the possibility of studying movement of small animals at very fine spatial scales, but the influence of rugged terrains and vegetation on localisation error curtails the applicability of this technology. In this study, we present a comparative workflow to reduce error and show how selecting higher radio signal ...
Rueda-Uribe C, Sargent AJ, Echeverry-Galvis MÁ, Camargo-Martínez PA, Capellini I, Lancaster LT, Rico-Guevara A, Travis JMJ.   +7 more
europepmc   +2 more sources

Global variability in hydraulic traits and water use strategies of mountain shrubs and dwarf shrubs. [PDF]

Plant Biol (Stuttg)
Shrubs show a wide range of hydraulic strategies to achieve a balanced and favourable water status in mountain areas. Abstract Shrubs are perennial, multi‐stemmed woody plants whose adaptation to stress factors allows them to colonise extreme habitats, including high elevations. Accordingly, shrubs are one of the most important growth forms in mountain
Musso C, Ganthaler A, Mayr S.
europepmc   +2 more sources

Phylogenetic signatures of ecological divergence and leapfrog adaptive radiation in Espeletia [PDF]

American Journal of Botany, 2021
PREMISEEvents of accelerated species diversification represent one of Earth’s most celebrated evolutionary outcomes. Northern Andean high‐elevation ecosystems, or páramos, host some plant lineages that have experienced the fastest diversification rates, likely triggered by ecological opportunities created by mountain uplifts, local climate shifts, and ...
Pouchon, Charles, Lavergne, Sébastien, Fernández, Ángel, Alberti, Adriana, Aubert, Serge, Mavarez, Jesus   +5 more
openaire   +4 more sources

Fragmocirrus espeletiae Foissner 2000

, 2020
Fragmocirrus espeletiae Foissner, 2000 Distribution. MEXICO: El Tegolome, near the town of Tlanchinol (ps), (Ts). VENEZUELA: South margin of the Henri Pittier National Park, Biological Station Rancho Grande (Foissner 2016).
Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso, Estrada, Rosaura Mayén-   +2 more
openaire   +3 more sources

The Nature of Espeletia Species [PDF]

, 2020
Abstract Species are often regarded as basic units of study in biology, following the presumption that they are real and discrete natural entities. But several biologists wonder if species are arbitrary divisions that do not correspond to discrete natural groups of organisms. Two issues must be addressed to solve this
Yam M. Pineda, Andrés J. Cortés, Santiago Madriñán, Iván Jiménez   +3 more
openaire   +1 more source