Results 11 to 20 of about 304,419 (162)

An elevational gradient in floral traits and pollinator assemblages in the Neotropical species Costus guanaiensis var. tarmicus in Peru. [PDF]

Ecol Evol, 2023
We analyzed floral traits and pollinator assemblages in the Neotropical species Costus guanaiensis var. tarmicus along a steep elevational gradient in Peru. Results show floral traits and pollinator assemblage variation along the elevational gradient. We examined our results considering two hypotheses: (1) local adaptation to different bee assemblages ...
Maguiña-Conde R, Zuñiga-Rivas D, Kay KM.   +2 more
europepmc   +2 more sources

Climate and hybridization shape stomatal trait evolution in Populus. [PDF]

New Phytol
Summary Stomata play a critical role in regulating plant responses to climate. Where sister species differ in stomatal traits, interspecific gene flow can influence the evolutionary trajectory of trait variation, with consequences for adaptation. Leveraging six latitudinally distributed contact zones spanning the natural hybrid zone between Populus ...
Zavala-Paez M, Keller SR, Holliday J, Fitzpatrick MC, Hamilton JA.   +4 more
europepmc   +2 more sources

Foliar spectral signatures reveal adaptive divergence in live oaks (Quercus section Virentes) across species and environmental niches. [PDF]

New Phytol
Summary Genomic tools have advanced our understanding of species and population structure, but distinguishing neutral from adaptive evolution remains challenging due to limited methods for measuring a broad spectrum of phenotypic traits. We used spectroscopic data from preserved leaves to test for adaptive divergence among populations of live oaks ...
Hernández-Leal MS, Guzmán Q JA, González-Rodríguez A, Cavender-Bares J.   +3 more
europepmc   +2 more sources

Reduced Offspring Viability Is Associated With Long-Term Stability of a Narrow Avian Hybrid Zone. [PDF]

Ecol Evol
We investigated hybrid viability in a tropical, avian hybrid zone governed by strong selection on male secondary sexual traits between the white‐collared manakin (Manacus candei) and golden‐collared manakin (M. vitellinus). We assessed putative hybrid fitness by investigating adult survival and hatching success along with a prospective selective ...
Long KM, Braun MJ, Muñoz Abrego A, Jaramillo O, Jones TM, Brawn JD.   +5 more
europepmc   +2 more sources

Use of community characteristics to predict hunting and game harvests in western Amazonian forests. [PDF]

Conserv Biol
Abstract Wild game harvesting in Amazonia provides rural residents with protein and cash income but can threaten wildlife populations and forest ecosystem functions. As yet, the socioeconomic and environmental drivers that shape hunter livelihoods remain poorly understood.
Zayonc D, Robinson BE, Coomes OT, Takasaki Y, Abizaid C.   +4 more
europepmc   +2 more sources

Phenological overlap between crop and pollinators: Contrasting influence of native and non‐native bees on raspberry fruits over the flowering season

Journal of Applied Ecology, Volume 60, Issue 12, Page 2540-2549, December 2023., 2023
Providing sufficient pollen and nectar resources to support wild pollinators over extended periods in agricultural landscapes can contribute to crop pollination and ensure high fruit weight and quality. This can be achieved by restoring natural and semi‐natural areas near crop fields with native, long‐flowering plant species.
Agustín Sáez, Lucas A. Garibaldi, Marcelo A. Aizen, Carolina L. Morales, Anna Traveset, Grecia S. de Groot, Reto Schmucki   +6 more
wiley   +1 more source

Enunciar la frontera sur de México desde la narrativa: algunos cuentos guatemaltecos

Liminar: Estudios Sociales y Humanísticos, 2022
A partir de una selección de seis textos de tres antologías de cuentos guatemaltecos se hace un análisis que dé cuenta de algunos de los rasgos representativos de la poética de distintos escritores del siglo XX y la primera década del siglo XXI en ...
Marco Antonio Chavarín González
doaj   +1 more source

Rasgos de identidad. Tres perspectivas epistemológicas de la contabilidad social y ambiental

Contabilidad y Negocios: Revista del Departamento Académico de Ciencias Administrativas, 2020
Este trabajo busca rasgos de identidad epistémica, y explora la existencia de una comunidad científica en el campo de la contabilidad social y ambiental.
Héctor José Sarmiento
doaj   +1 more source

Selección de pareja y apego en padres de familia de una unidad educativa de Riobamba

Revista Eugenio Espejo
El objetivo del presente trabajo fue analizar los criterios de selección de pareja en relación al apego en adultos. Esta investigación fue cuantitativa, correlacional, de corte transversal, con 170 participantes, escogidos a través de un muestreo no ...
César Eduardo Ponce Guerra, María Soledad Fierro Villacreses, Renata Patricia Aguilera Vásconez   +2 more
doaj   +1 more source

Estrategias de selección para la mejora genética de las razas Siboney de Cuba y Mambí de Cuba

Anales de la Academia de Ciencias de Cuba, 2021
Introducción: La evaluación genética de las razas bovinas Siboney de Cuba (5/8 Holstein 3/8 Cebú) y Mambí de Cuba (3/4 Holstein 1/4 Cebú) se realiza considerando la producción lechera mediante un modelo animal unicarácter, para cada raza ...
Arelis Hernández Rodríguez, Raquel Elena Ponce de León Sentí, Simón González Prieto, Alma Fernández Naranjo, Niurka Prada Gutiérrez, Ramiro Ramírez Vázquez   +5 more
doaj