Results 81 to 90 of about 211,717 (209)

Advancing conservation breeding programs for marine invertebrates

open access: yesConservation Biology, EarlyView.
Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam   +3 more
wiley   +1 more source

Utilización del patrón de restricción del DNA codificante para el RNA Ribosomal de la subunidad pequeña para la caracterización de Apicomplexa

open access: yesActa Biológica Colombiana, 1996
Apicomplexa is a Protozoa phylum in which all members are obliged parasites of a wide range of vertebrate and invertebrate hosts. There is an ongoing controversy on systematics, phylogenetic relationships and parasite - host coevolution patterns. The SSU
Adelaida López   +2 more
doaj  

La proliferación de los conceptos de especie en la biología evolucionista

open access: yesTheoria, 2010
La biología evolucionista no ha logrado definir un concepto de especie que satisfaga a todos sus colaboradores. El presente panorama crítico de las principales propuestas y sus respectivas dificultades apunta, por un lado, a ilustrar los procesos de ...
Roberto Torretti
doaj   +1 more source

Taxonomic and functional diversity of urban bees of the world

open access: yesConservation Biology, EarlyView.
Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso   +10 more
wiley   +1 more source

UNA NUEVA ESPECIE MEXICANA DE ROUREA (CONNARACEAE) [PDF]

open access: yes, 2007
Se describe e ilustra una especie de Connaraceae de México, Rourea vulcanicolaForero.
Forero González, Enrique   +2 more
core  

Una nueva especie de Agave (Asparagaceae) de Colombia y una clave taxonómica para las especies sudamericanas [PDF]

open access: yes, 2017
Como resultado de recientes estudios en Asparagaceae sudamericanas, se describe y se ilustra una nueva especie del género Agave. Se siguió el concepto morfológico de especie y se tomaron fotografías de diferentes estructuras vegetativas y reproductivas ...
Diego Alonso Giraldo Cañas   +1 more
core   +1 more source

Estimating the total mortality of seabirds following a marine heat wave

open access: yesConservation Biology, EarlyView.
Abstract Marine heat waves detrimentally affect a range of marine species, including seabirds, and are increasing in frequency and severity. When thousands of dead seabirds wash up on beaches, the public becomes concerned. However, the number of dead birds recorded on beaches is only a fraction of the total mortality; most birds perish at sea.
Jennifer L. Lavers   +3 more
wiley   +1 more source

Anatomía del fruto de la uchuva

open access: yesActa Biológica Colombiana, 1986
The present paper analyzes the observed anatomical changes during the development of the fruit of this species. lt begins with the general anatomical study of the ovary in the flower-bud-and in the detailed study of it in each one of the stages.
Martha Lucia Ch. de Valencia
doaj  

Deprea cyanocarpa (solanaceae, physaleae): una nueva especie para colombia [PDF]

open access: yes, 2007
Se propone y se describe Deprea cyanocarpa una nueva especie de Solanaceae, delos bosques montanos húmedos del cañón del Combeima en el departamento delTolima, cordillera Central de Colombia entre 2800-3000 m de altitud.
Orozco Pardo, Clara Inés   +3 more
core  

Prevalence of traded bird species in key biodiversity areas

open access: yesConservation Biology, EarlyView.
Abstract The use and trade of biodiversity involve tens of thousands of species that are exploited at a range of scales, intensities, and degrees of sustainability. As a result, some are highly threatened. Key biodiversity areas (KBAs) are sites of significance for the persistence of biodiversity identified nationally based on standardized criteria ...
Oscar Morton   +4 more
wiley   +1 more source

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