• Publications
  • Influence
Habitat fragmentation and its lasting impact on Earth’s ecosystems
TLDR
An analysis of global forest cover is conducted to reveal that 70% of remaining forest is within 1 km of the forest’s edge, subject to the degrading effects of fragmentation, indicating an urgent need for conservation and restoration measures to improve landscape connectivity. Expand
Are Plant Populations Seed Limited? A Critique and Meta‐Analysis of Seed Addition Experiments
TLDR
It was found that, in keeping with previous studies, most species are seed limited, however, the effects of seed addition are typically small, and most added seeds fail to recruit to the seedling stage, so establishment limitation is stronger than seed limitation. Expand
Effects of elemental composition on the incorporation of dietary nitrogen and carbon isotopic signatures in an omnivorous songbird
TLDR
Feathers were the most enriched and whole blood and plasma were the least enriched or, in the case of carbon, slightly depleted relative to diet, and for all tissues, carbon and nitrogen isotope discrimination factors increased withcarbon and nitrogen concentrations of diets. Expand
Spatial and Temporal Variation in Costa Rican Fruit and Fruit‐Eating Bird Abundance
TLDR
It is suggested that insect abundance may be more important than fruit abundance in determining breeding cycles of these birds, and large areas of diverse habitats are probably necessary for the long-term maintenance of frugivore populations. Expand
Seed dispersal and frugivory : ecology, evolution, and conservation
Historical and theoretical aspects of frugivory and seed dispersal plant strategies animal strategies conseqences of seed dispersal conservation perspectives. (Part contents).
Secondary Metabolites Of Fleshy Vertebrate‐Dispersed Fruits: Adaptive Hypotheses And Implications For Seed Dispersal
TLDR
It is concluded that synergistic interactions and multifunctionality in secondary metabolites may provide economical evolutionary solutions for plants facing disparate and temporally variable selective pressures that impinge on fruits and seeds. Expand
Recent advances in understanding migration systems of New World land birds
TLDR
periodic reviews focus future research and inform conservation and management; here, the combined experiences working on Western Hemisphere avian migration systems are taken advantage to highlight recent lessons and critical gaps in knowledge. Expand
Evolutionary Precursors of Long-Distance Migration: Resource Availability and Movement Patterns in Neotropical Landbirds
TLDR
It is hypothesize that seasonal movements within the tropics predisposed these birds to migration out of the Tropics, and similarities in habitat use and diet between overwintering Nearctic migrants and closely related tropical residents are provided. Expand
Seed Size and Fruit-Handling Techniques of Avian Frugivores
  • D. Levey
  • Biology
  • The American Naturalist
  • 1 April 1987
TLDR
Plants may respond evolutionarily to the differences in the seed-dispersal probability of mashers and gulpers through different fruit presentation methods, shifted fruiting seasons, seed size, and pericarp texture. Expand
COMPLEX ANT-PLANT INTERACTIONS: RAIN FOREST ANTS AS SECONDARY DISPERSERS AND POST-DISPERSAL SEED PREDATORS'
TLDR
The results challenge the generalizations that small seeds are largely protected from predation because of their size, that post-dispersal seed harvesting is equiv- alent to seed predation, that competition among seedlings from a frugivore defecation is common, and thatsmall seeds accumulate over long periods of time in the seed bank. Expand
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