Browsing by Autor "Adam Felton"

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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
Diet and Feeding Ecology of Ateles chamek in a Bolivian Semihumid Forest: The Importance of Ficus as a Staple Food Resource
(Springer Science+Business Media, 2008) Annika M. Felton; Adam Felton; Jeff T. Wood; David B. Lindenmayer
Nutritional Ecology of Ateles chamek in lowland Bolivia: How Macronutrient Balancing Influences Food Choices
(Springer Science+Business Media, 2009) Adam Felton; Adam Felton; Jeff T. Wood; William J. Foley; David Raubenheimer; Ian R. Wallis; David B. Lindenmayer
Protein content of diets dictates the daily energy intake of a free-ranging primate
(Oxford University Press, 2009) Adam Felton; Adam Felton; David Raubenheimer; Stephen J. Simpson; William J. Foley; Jeff T. Wood; Ian R. Wallis; David B. Lindenmayer
An important goal in nutritional ecology is to understand what governs the diet selection of free-living animals. Relevant information is however scarce because of the considerable challenges of collecting and interpreting such data. Here we use recent advances in nutritional theory to analyze data on food selection and nutrient intake by wild spider monkeys (Ateles chamek). We show that hypotheses traditionally used to explain vertebrate diet selection, such as energy or protein maximization, or avoidance of plant secondary metabolites, cannot explain the observed pattern of nutrient intake. Instead, spider monkeys maintained a stable daily protein intake but allowed total energy intake to vary as a function of the composition of available food items. A similar ''protein-leverage effect'' has been reported in humans for whom it appears to play a role in the development of obesity.
The role of timber tree species in the nutritional ecology of spider monkeys in a certified logging concession, Bolivia
(Elsevier BV, 2010) Adam Felton; Adam Felton; William J. Foley; David B. Lindenmayer