Research Topics
| D J LeveySummaryAffiliation: University of Florida Country: USA Publications
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Detail Information
Publications
Test, rejection, and reformulation of a chemical reactor-based model of gut function in a fruit-eating birdD J Levey
Department of Zoology, University of Florida, Gainesville, FL 32611 8525, USA
Physiol Biochem Zool 72:369-83. 1999..We propose a modification of the assumptions of the original model. The resulting "osmotic constraint" model better captures the interaction between feeding rate and digestive function in fruit-eating birds...- A field test of the directed deterrence hypothesis in two species of wild chiliDouglas J Levey
Department of Zoology, University of Florida, 118525, Gainesville, FL 32611 8525, USA
Oecologia 150:61-8. 2006..annuum). These results support the directed deterrence hypothesis and suggest that fruiting plants distinguish between seed predators and seed dispersers by producing fruits that repel the former and attract the latter... - Effects of landscape corridors on seed dispersal by birdsDouglas J Levey
Department of Zoology, University of Florida, Post Office Box 118525, Gainesville, FL 32611 8525, USA
Science 309:146-8. 2005..Our study shows how models based on easily observed behaviors can be scaled up to predict landscape-level processes... - Animal behaviour: use of dung as a tool by burrowing owlsDouglas J Levey
Department of Zoology, PO Box 118525, University of Florida, Gainesville, Florida 32611 8525, USA
Nature 431:39. 2004..Our controlled investigation provides an unambiguous estimate of the importance of tool use in a wild animal... - An experimental test of dietary enzyme modulation in pine warblers Dendroica pinusD J Levey
Department of Zoology, P O Box 118525, University of Florida, Gainesville, FL 32611 8525
Physiol Biochem Zool 72:576-87. 1999..All predictions were upheld, supporting the hypothesis that pine warblers modulate the activity of digestive enzymes in proportion to demand from substrates in the diet... - Corridors increase plant species richness at large scalesEllen I Damschen
Department of Zoology, North Carolina State University, Raleigh, NC 27695 7617, USA
Science 313:1284-6. 2006..Our results support the use of corridors in biodiversity conservation... - Plants as reef fish: fitting the functional form of seedling recruitmentJ R Poulsen
Department of Zoology, University of Florida, P O Box 11852, Gainesville, Florida 32611, USA
Am Nat 170:167-83. 2007..Seedling density reached saturation with increasing seed density in many studies, but at such high densities that seedling density was primarily limited by seed availability rather than microsite availability or density dependence... - Squeezed at the top: Interspecific aggression may constrain elevational ranges in tropical birdsJill E Jankowski
Department of Biology, University of Florida, Gainesville, Florida 32611 8525, USA
Ecology 91:1877-84. 2010.... - Urban mockingbirds quickly learn to identify individual humansDouglas J Levey
Department of Biology, University of Florida, Gainesville, FL 32611 8525, USA
Proc Natl Acad Sci U S A 106:8959-62. 2009.... - Corridors affect plants, animals, and their interactions in fragmented landscapesJoshua J Tewksbury
Department of Zoology, 223 Bartram Hall, University of Florida, Gainesville, FL 32611-8525, USA
Proc Natl Acad Sci U S A 99:12923-6. 2002.... - Are plant populations seed limited? A critique and meta-analysis of seed addition experimentsC J Clark
School of Natural Resources and the Environment, University of Florida, Gainesville, Florida 32611, USA
Am Nat 170:128-42. 2007..Most seed addition experiments cannot assess the relationship between number of seeds added and number of subsequent recruits. This shortcoming can be overcome by increasing the number and range of seed addition treatments... - Habitat corridors function as both drift fences and movement conduits for dispersing fliesJoanna H Fried
Department of Zoology, University of Florida, Gainesville, 118525, FL 32611-8525, USA
Oecologia 143:645-51. 2005..Taken together, our results suggest that corridors can affect dispersal of organisms in unappreciated ways (i.e., as drift fences) and that edge type can alter dispersal behavior... - Cold temperature increases winter fruit removal rate of a bird-dispersed shrubCharles Kwit
Department of Zoology, University of Florida, Box 118525, Gainesville, FL 32611, USA
Oecologia 139:30-4. 2004..From the plant's perspective, it demonstrates inter-annual variation in the temporal component of seed dispersal, with possible consequences for post-dispersal seed and seedling ecology... - Dispersers shape fruit diversity in Ficus (Moraceae)Silvia B Lomáscolo
Department of Biology, University of Florida, Gainesville, FL 32611, USA
Proc Natl Acad Sci U S A 107:14668-72. 2010..Taken together, these results demonstrate that differences among frugivores have shaped the evolution of fruit traits. More broadly, our results underscore the importance of mutualisms in both generating and maintaining biodiversity... - Effects of elemental composition on the incorporation of dietary nitrogen and carbon isotopic signatures in an omnivorous songbirdScott F Pearson
Department of Zoology, University of Florida, Gainesville, FL 32611 8525, USA
Oecologia 135:516-23. 2003.... - Determinants of partial bird migration in the Amazon BasinAlex E Jahn
Department of Biology, University of Florida, Gainesville, FL 32611 8525, USA
J Anim Ecol 79:983-92. 2010..e. tyrannids), and seasonality is largely defined by rainfall cycles. 7. We propose a hypothesis based on seasonal food limitation to explain partial migration of primarily insectivorous species in seasonal tropical habitats... - Costs and benefits of capsaicin-mediated control of gut retention in dispersers of wild chiliesJoshua J Tewksbury
Department of Biology, 106 Kincaid Hall, Box 351800, University of Washington, Seattle, Washington 98195, USA
Ecology 89:107-17. 2008..These results illustrate the importance of context in studies of fruit secondary metabolites. The same chemical can have different impacts on plant fitness depending on its morphological, physiological, and ecological context... - Evolutionary ecology of pungency in wild chiliesJoshua J Tewksbury
Department of Biology, University of Washington, Box 351800, 24 Kincaid Hall, Seattle, WA 98195 1800, USA
Proc Natl Acad Sci U S A 105:11808-11. 2008..These results suggest that the pungency in chilies may be an adaptive response to selection by a microbial pathogen, supporting the influence of microbial consumers on fruit chemistry... - Effects of dung and seed size on secondary dispersal, seed predation, and seedling establishment of rain forest treesEllen Andresen
Centro de Investigaciones en Ecosistemas, Universidad Nacional Autonoma de Mexico, Apartado Postal 27 3, C P 58089, Morelia, Michoacan, Mexico
Oecologia 139:45-54. 2004..More generally, our results emphasize the importance of looking beyond a single type of plant-animal interaction (e.g., seed dispersal or seed predation) to incorporate potential effects of interacting interactions... - Where did the chili get its spice? Biogeography of capsaicinoid production in ancestral wild chili speciesJoshua J Tewksbury
Department of Biology, University of Washington, Seattle, 98195, USA
J Chem Ecol 32:547-64. 2006..Determining the selection pressures behind such shifts is necessary to understand the evolution of pungency in chilies...