Assessing the use of forest islands by parrot species in a neotropical savanna

 

Autores
Berkunsky, Igor; Simoy, Maria Veronica; Cepeda, Rosana Esther; Marinelli, Claudia Beatriz; Kacoliris, Federico Pablo; Daniele, Gonzalo; Cortelezzi, Agustina; Díaz-Luque, José A.; Friedman, Juan Mateo; Aramburu, Rosana Mariel
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2015
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
Understanding the effect of habitat fragmentation is a fundamental yet complicated aim of many ecological studies. Beni savanna is a naturally fragmented forest habitat, where forest islands exhibit variation in resources and threats. To understand how the availability of resources and threats affect the use of forest islands by parrots, we applied occupancy modeling to quantify use and detection probabilities for 12 parrot species on 60 forest islands. The presence of urucuri (Attaleaphalerata) and macaw (Acrocomia aculeata) palms, the number of tree cavities on the islands, and the presence of selective logging,and fire were included as covariates associated with availability of resources and threats. The model-selection analysis indicated that both resources and threats variables explained the use of forest islands by parrots. For most species, the best models confirmed predictions. The number of cavities was positively associated with use of forest islands by 11 species. The area of the island and the presence of macaw palm showed a positive association with the probability of use by seven and five species, respectively, while selective logging and fire showed a negative association with five and six species, respectively. The Blue-throated Macaw (Ara glaucogularis), the critically endangered parrot species endemic to our study area, was the only species that showed a negative association with both threats. Monitoring continues to be essential to evaluate conservation and management actions of parrot populations. Understanding of how species are using this natural fragmented habitat will help determine which fragments should be preserved and which conservation actions are needed.
Idioma
francés
OAI Identifier
oai:ri.conicet.gov.ar:11336/53750
Enlace del recurso
http://hdl.handle.net/11336/53750
Nivel de acceso
Acceso abierto
Materia
BOLIVIA
HABITAT USE
MACAW
OCCUPANCY MODEL
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS