Browsing by Autor "Bennett Hennessey"

Now showing 1 - 3 of 3

A comparison of bird communities in the anthropogenic and natural-tree fall gaps of a reduced-impact logged subtropical forest in Bolivia
(Cambridge University Press, 2008) Adam Felton; Jeff T. Wood; Annika M. Felton; David B. Lindenmayer; Bennett Hennessey; David B. Lindenmayer; Bennett A. Hennessey
Abstract We studied bird community composition and abundance within four vegetation and disturbance categories located within selectively logged and unlogged forest in a Bolivian subtropical lowland forestry concession. The logged forest was subject to reduced-impact logging between 1 and 4 years prior to our study. The four categories were: 1) ‘gap’ points possessing natural or anthropogenic tree-fall gaps; 2) ‘target’ points with one of five commercial tree species of harvestable size; 3) ‘future’ points possessing a commercial tree below harvestable size and 4) ‘non-target’ points not possessing harvestable tree species. The bird community composition of logging gaps significantly differed from that found within natural tree-fall gaps in the unlogged forest P < 0.05. Species richness was higher in natural tree-fall gaps than in anthropogenic gaps. Furthermore, a higher proportion of disturbance sensitive species were associated with natural-tree fall gaps, whereas a higher proportion of disturbance tolerant species were associated with anthropogenic gaps. No significant difference was detected in the bird community composition for the other three vegetation categories surveyed. We discuss the conservation and silvicultural repercussions of these results.
Bird community responses to reduced-impact logging in a certified forestry concession in lowland Bolivia
(Elsevier BV, 2008) Adam Felton; Jeff T. Wood; Annika M. Felton; Bennett Hennessey; David B. Lindenmayer; Bennett Hennessey; David B. Lindenmayer
The Near Threatened Tucumán parrot <i>Amazona tucumana</i> in Bolivia: insights for a global assessment
(Cambridge University Press, 2009) Luis Rivera; Raul Rojas Llanos; Natalia Politi; Bennett Hennessey; Enrique H. Bucher
Abstract The Tucumán parrot Amazona tucumana is restricted to the southern Yungas mountains, from south-eastern Bolivia to north-western Argentina, and has undergone intense capture for the pet trade. We provide updated information on the status of the Bolivian population of the species and past capture levels for the international pet trade. We surveyed 18 sites during the non-breeding season in 2006 and 2007 and recorded a total of 1,643 individuals. In the 1980s 5,400 Tucumán parrots were captured for the international pet trade before the species was listed on CITES Appendix I. Capture of the Tucumán parrot for local trade appears to continue but at a reduced scale. Available evidence from this study and from Argentina indicates a need to change the categorization of the species on the IUCN Red List from Near Threatened to Vulnerable.