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2 resultados encontrados para: AUTOR: Ortega, Josué
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Artículo
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Effectiveness of Panama as an intercontinental land bridge for large mammals
Meyer, Ninon France Victoire (autora) ; Moreno, Ricardo (autor) ; Sutherland, Christopher (autor) ; De la Torre, José Antonio (autor) ; Esser, Helen J. (autora) ; Jordan, Christopher A. (autor) ; Olmos, Melva (autora) ; Ortega, Josué (autor) ; Reyna Hurtado, Rafael Ángel (autor) ; Valdes, Samuel (autor) ; Jansen, Patrick A. (autor) ;
Contenido en: Conservation Biology Vol. 34, no. 1 (2020), p. 207–219 ISSN: 1434-4483
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Resumen en: Inglés |
Resumen en inglés

Habitat fragmentation is a primary driver of wildlife loss, and establishment of biological corridors is a common strategy to mitigate this problem. A flagship example is the Mesoamerican Biological Corridor (MBC), which aims to connect protected forest areas between Mexico and Panama to allow dispersal and gene flow offorest organisms. Because forests across Central America have continued to degrade, the functioning of the MBC has been questioned, but reliable estimates of species occurrence were unavailable. Large mammals are suitable indicators of forest functioning, so we assessed their conservation status across the Isthmus of Panama, the narrowest section of the MBC. We used large-scale camera-trap surveys and hierarchical multispecies occupancy models in a Bayesian framework to estimate the occupancy of 9 medium to large mammals and developed an occupancy-weighted connectivity metric to evaluate species-specific functional connectivity. White-lippedpeccary (Tayassu pecari), jaguar (Panthera onca), giant anteater (Myrmecophaga tridactyla), white-tailed deer(Odocoileus virginianus), and tapir (Tapirus bairdii) had low expected occupancy along the MBC in Panama. Puma (Puma concolor), red brocket deer (Mazama temama), ocelot (Leopardus pardalis), and collared peccary (Pecari tajacu), which are more adaptable, had higher occupancy, even in areas with low forest cover near infrastructure. However, the majority of species were subject to > 1 gap that was larger than their known dispersal distances, suggesting poor connectivity along the MBC in Panama. Based on our results, forests in Darien, Donoso–Santa Fe, and La Amistad International Park are critical for survival of large terrestrial mammals in Panama and 2 areas need restoration.


2.
- Artículo con arbitraje
Do protected areas in Panama support intact assemblages of ungulates?
Meyer, Ninon France Victoire ; Moreno, Ricardo (coaut.) ; Sanches, Edgar (coaut.) ; Ortega, Josue (coaut.) ; Brown, Elliot (coaut.) ; Jansen, Patrick A. (coaut.) ;
Contenido en: Therya Vol. 7, no. 1 (2016), p. 185–192 ISSN: 2007-3364
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Resumen en: Español | Inglés |
Resumen en español

Los ungulados tienen un papel esencial en los ecosistemas terrestres, pero sufren de la caza y la degradación del hábitat, lo que a menudo resulta en su extinción local. Panamá alberga cinco especies de ungulados, y a pesar de constituir una porción importante del corredor biológico mesoamericano, sus áreas boscosas y su fauna están actualmente amenazados. Las áreas protegidas han sido designadas para preservar la biodiversidad, pero los estudios que evalúan sus eficacias para mantener la diversidad de los ungulados son escasos en Panamá. En este estudio se utilizó muestreos mediante cámaras trampas para determinar la ocurrencia y abundancia de las especies de ungulados en 13 áreas protegidas repartidos a través del Istmo de Panamá. Encontramos que hubo diferencias en las comunidades de ungulados encontradas en los sitios muestreados. Algunos sitios fueron pobres, con la representación de sólo una especie de ungulados registrada, mientras que únicamente en un sitio se detectaron las cinco especies de ungulados. El pecarí de labios blancos era la especie más rara y el pecarí de collar el más común, ya que fue fotografiado en todos los sitios. También, encontramos una gran variación en la abundancia de especies de ungulados en los diferentes sitios. Nuestros resultados indican que pocas áreas protegidas en Panamá mantienen toda la comunidad de ungulados.

Resumen en inglés

Ungulates play an essential role in terrestrial ecosystems, but suffer from hunting and habitat degradation which often results in their decline. Panama harbors five species of ungulate and is an important portion of the Mesoamerican Biological Corridor, but its forest habitat and its fauna are currently threatened. Protected areas have been designated to preserve the biodiversity, but studies evaluating their effectiveness in maintaining ungulates are lacking in Panama. In this study we used camera-trapping surveys to determine the occurrence and abundance of the ungulate species in 13 protected areas across Panama. There were large differences in the ungulate communities among the sites we surveyed. Some sites were impoverished with just one ungulate species recorded while just a single site harbored all five species. The white-lipped peccary was the rarest species and the collared peccaries the most common, captured in all the sites. Moreover, we found large variation in ungulate abundance across the sites. Our results indicate that few protected areas in Panama effectively maintain the entire assemblage of ungulate species.