Browsing by Author "Hester, Alison"

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Forest cover outside protected areas plays an important role in the conservation of the Vulnerable guina Leopardus guigna
    (2013) Galvez, Nicolas; Hernandez, Felipe; Laker, Jerry; Gilabert, Horacio; Petitpas, Robert; Bonacic Salas, Cristian; Gimona, Alessandro; Hester, Alison; Macdonald, David W.
  • Thumbnail Image
    Item
    Relationship between fragmentation, degradation and native and exotic species richness in an Andean temperate forest of Chile
    (2011) Rojas, Isabel; Becerra, Pablo; Galvez, Nicolas; Laker, Jerry; Bonacic Salas, Cristian; Hester, Alison
  • Thumbnail Image
    Item
    Rufous-legged Owl (Strix rufipes) and Austral Pygmy Owl (Glaucidium nanum) stand use in a gradient of disrupted and old growth Andean temperate forests, Chile
    (TAYLOR & FRANCIS LTD, 2012) Ibarra Eliessetch, José Tomás; Galvez, Nicolas; Gimona, Alessandro; Altamirano, Tomas A.; Rojas, Isabel; Hester, Alison; Laker, Jerry; Bonacic, Cristian
    We studied how human induced structural changes in forests affect stand use of the Rufous-legged Owl (forest-specialist) and the Austral Pygmy Owl (forest-facultative), in a gradient from lowland disrupted forests to protected Andean forests in Chile. We also tested if the calls of one species influenced the calling behaviour of the other. We detected a total of 34 Rufous-legged Owls and 21 Austral Pygmy Owls during the four seasons. Rufous-legged Owls were found principally in old growth Araucaria-Nothofagus stands (32.4%), and Pygmy Owls in old growth evergreen stands (52.4%). For both species there was a seasonal effect on call response, with a drop in responses in autumn and winter. Our models suggested that Rufous-legged Owls inhabit a more specific range of habitat characteristics than Pygmy Owls. The former selected stands with tall trees, relatively low tree density, and high bamboo density. Pygmy Owls selected stands with tall trees and relatively high tree density. There was no evidence that either species influenced the calling behaviour of the other, suggesting no negative association between use of a territory by the two species. Our results emphasize the importance of structural components of old growth forests for both species, but also the relevance of stands surrounding protected areas.