Results 31 to 40 of about 929 (164)

Measuring maternal line selection driven by differential survival in ex situ collections for plant conservation

open access: yesConservation Biology, EarlyView.
Abstract Ex situ plant collections may be increasingly needed to protect representative samples of threatened or rare species and provide plant material for conservation translocation. A primary problem in these ex situ collections is loss of intraspecific variation due to plant death. Different management actions would be required depending on whether
Rebecca Sucher   +6 more
wiley   +1 more source

Height and phytotelm size affect the invertebrate communities of epiphytic bromeliads in the Amazon rainforest

open access: yesEcological Entomology, Volume 51, Issue 2, Page 221-234, April 2026.
The height at which epiphytic bromeliads are found affects the invertebrate community composition within them. The size of epiphytic bromeliads is positively correlated with species richness of both aquatic and terrestrial invertebrates. Whether bromeliads were found in primary or secondary forest did not have a significant effect on the community of ...
Xaali O'Reilly‐Berkeley   +6 more
wiley   +1 more source

Climate and hybridization shape stomatal trait evolution in Populus

open access: yesNew Phytologist, Volume 249, Issue 2, Page 792-809, January 2026.
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 ...
Michelle Zavala‐Paez   +4 more
wiley   +1 more source

Límites de la distribución y variación geográfica en morfología, coloración y marcas de plumaje de Myioborus melanocephalus y Myioborus ornatus Aves: Parulidae en el suroccidente de Colombia [PDF]

open access: yes, 2012
Esta investigación en variación geográfica morfológica, en la coloración y marcas de plumaje en las especies Myioborus melanocephalus y M. ornatus en el suroccidente de Colombia, se inicia por el registro de individuos con características atípicas a los ...
Mendoza, José
core  

Soy, doy, estoy y voy: la yod desinencial en el corpus CODEA+ 2015

open access: yese-Scripta Romanica, 2021
Desde una perspectiva que aúna diferentes disciplinas lingüísticas, se investiga la variación consustancial al cambio y la selección que afectaron a las variables de primera persona de singular de los verbos ser, estar, dar e ir en documentos notariales ...
Marina Serrano Marín
doaj   +1 more source

Environmental and Geographic Conditions on the Breeding Grounds Drive Bergmannian Clines in Nightjars

open access: yesJournal of Biogeography, Volume 52, Issue 10, October 2025.
ABSTRACT Aim To evaluate (1) whether three migratory nightjar species (Family Caprimulgidae) adhere to Bergmann's rule, (2) whether environmental factors on the breeding or wintering grounds determine body size, and (3) which mechanistic hypotheses best explain Bergmannian patterns in body size.
Aaron A. Skinner   +28 more
wiley   +1 more source

Amaranto: distribución y diversidad morfológica del recurso genético en partes de la región Maya (sureste de México, Guatemala y Honduras)

open access: yesActa Botanica Mexicana, 2020
Antecedentes y Objetivos: El amaranto es de interés mundial por su valor nutricional como verdura y grano. Las especies cultivadas de mayor importancia comercial por su producción de grano son Amaranthus caudatus, A. cruentus y A. hypochondriacus.
Erick A. Aguilera-Cauich   +4 more
doaj   +1 more source

Tenir compte de la variation géographique et de la pauvreté dans l’intervention en protection de l’enfance au Québec

open access: yesCriminologie, 2023
Plusieurs études menées au cours de la dernière décennie démontrent une relation claire entre la pauvreté et le risque de faire face à une intervention de la Direction de la protection de la jeunesse au Québec (DPJ).
Tonino Esposito   +5 more
doaj   +1 more source

Mutational load and adaptive variation are shaped by climate and species range dynamics in Vitis arizonica

open access: yesNew Phytologist, Volume 247, Issue 2, Page 998-1014, July 2025.
Summary Genetic load can reduce fitness and hinder adaptation. While its genetic underpinnings are well established, the influence of environmental variation on genetic load is less well characterized, as is the relationship between genetic load and putatively adaptive genetic variation.
Christopher J. Fiscus   +3 more
wiley   +1 more source

Estudio de la vulnerabilidad de redes de transporte desde una perspectiva geográfica

open access: yesRevista de Estudios Andaluces, 2012
En la planificación y gestión de las redes de transporte no suele hacerse referencia a la vulnerabilidad de las mismas. Las consecuencias económicas, sociales y territoriales de los daños producidos sobre estas redes por acontecimientos de carácter ...
Eduardo Rodríguez-Núñez
doaj   +1 more source

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