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12 resultados encontrados para: AUTOR: Meyer, Ninon France Victoire
11.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Using a novel model approach to assess the distribution and conservation status of the endangered Baird’s tapir
Schank, Cody J. ; Cove, Michael V. (coaut.) ; Kelly, Marcella J. (coaut.) ; Mendoza Ramírez, Eduardo (coaut.) ; O´Farril Cruz, Elsa Georgina (coaut.) ; Reyna Hurtado, Rafael Ángel (coaut.) ; Meyer, Ninon France Victoire (coaut.) ; Jordan, Christopher A. (coaut.) ; González Maya, José F. (coaut.) ; Lizcano, Diego J. (coaut.) ; Moreno, Ricardo (coaut.) ; Dobbins, Michael T. (coaut.) ; Montalvo, Víctor (coaut.) ; Sáenz Bolaños, Carolina (coaut.) ; Carillo Jiménez, Eduardo (coaut.) ; Estrada, Nereyda (coaut.) ; Cruz Díaz, Juan Carlos (coaut.) ; Sáenz, Joel (coaut.) ; Spínola, Manuel (coaut.) ; Carver, Andrew (coaut.) ; Fort, Jessica (coaut.) ; Nielsen, Clayton K. (coaut.) ; Botello, Francisco (coaut.) ; Pozo Montuy, Gilberto (coaut.) ; Rivero Hernández, Crysia Marina (coaut.) ; De la Torre, José Antonio (coaut.) ; Brenes Mora, Esteban (coaut.) ; Godínez Gómez, Oscar (coaut.) ; Wood, Margot A. (coaut.) ; Gilbert, Jessica (coaut.) ; Miller, Jennifer A. (coaut.) ;
Contenido en: Diversity and Distributions Vol. 23, no. 12 (December 2017), p. 1459–1471 ISSN: 1809-127X
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Aim: We test a new species distribution modelling (SDM) framework, while comparing results to more common distribution modelling techniques. This framework allows for the combination of presence-only (PO) and presence-absence (PA) data and accounts for imperfect detection and spatial bias in presence data. The new framework tested here is based on a Poisson point process model, which allows for predictions of population size. We compared these estimates to those provided by experts on the species. Species and Location: Presence data on Baird’s tapir (Tapirus bairdii) throughout its range from southern México to northern Colombia were used in this research, primarily from the years 2000 to 2016. Methods: Four SDM frameworks are compared as follows: (1) Maxent, (2) a presence-only (PO) SDM based on a Poisson point process model (PPM), (3) a presence-absence (PA) SDM also based on a PPM and (4) an Integrated framework which combines the previous two models. Model averaging was used to produce a single set of coefficient estimates and predictive maps for each model framework. A hotspot analysis (Gi*) was used to identify habitat cores from the predicted intensity of the Integrated model framework. Results: Important variables to model the distribution of Baird’s tapir included land cover, human pressure and topography. Accounting for spatial bias in the presence data affected which variables were important in the model. Maxent and the Integrated model produced predictive maps with similar patterns and were considered to be more in agreement with expert knowledge compared to the PO and PA models.

Main conclusions: Total abundance as predicted by the model was higher than expert opinion on the species, but local density estimates from our model were similar to available independent assessments. We suggest that these results warrant further validation and testing through collection of independent test data, development of more precise predictor layers and improvements to the model framework.


12.
- 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.