Generalist birds promote tropical forest regeneration and increase plant diversity via rare-biased seed dispersal.

@article{Carlo2016GeneralistBP,
  title={Generalist birds promote tropical forest regeneration and increase plant diversity via rare-biased seed dispersal.},
  author={Tom{\'a}s A. Carlo and Juan Manuel Morales},
  journal={Ecology},
  year={2016},
  volume={97 7},
  pages={
          1819-1831
        }
}
Regenerated forests now compose over half of the world's tropical forest cover and are increasingly important as providers of ecosystem services, freshwater, and biodiversity conservation. Much of the value and functionality of regenerating forests depends on the plant diversity they contain. Tropical forest diversity is strongly shaped by mutualistic interactions between plants and fruit-eating animals (frugivores) that disperse seeds. Here we show how seed dispersal by birds can influence the… 

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References

SHOWING 1-10 OF 55 REFERENCES
Post-Dispersal Seed Predation Rates in a Puerto Rican Pasture
TLDR
It is concluded that post-dispersal seed predation by rodents can serve as an important ecological filter that could shape the early community dynamics of forest recovery in abandoned Puerto Rican pastures.
The role of remnant forest trees in tropical secondary succession
This paper emphasizes the contribution of remnant trees to the establishment of woody species during succession on abandoned fields and pastures in the Mexican rain forest area, Los Tuxtlas,
Avian fruit preferences across a Puerto Rican forested landscape: pattern consistency and implications for seed removal
TLDR
Preference patterns, particularly those exhibiting consistency in space and time for plant species having prolonged fruiting periods, may have important mechanistic consequences for the persistence, succession, and regeneration of tropical plant communities.
Factors Limiting Tropical Rain Forest Regeneration in Abandoned Pasture: Seed Rain, Seed Germination, Microclimate, and Soil 1
Vegetation, seed rain, seed germination, microclimate, and soil physical and chemical parameters were measured in a recently abandoned pasture and adjacent primary rain forest in southern Costa Rica.
Do Bird Perching Structures Elevate Seed Rain and Seedling Establishment in Abandoned Tropical Pasture?
TLDR
It is suggested that, although bird perching structures increase seed dispersal, they do not overcome other barriers to tropical forest recovery such as seed predation and low seed germination.
Herbivores and the Number of Tree Species in Tropical Forests
  • D. Janzen
  • Environmental Science
    The American Naturalist
  • 1970
TLDR
Any event that increases the efficiency of the predators at eating seeds and seedlings of a given tree species may lead to a reduction in population density of the adults of that species and/or to increased distance between new adults and their parents.
Arrival ≠ Survival
Seed dispersal is commonly a limiting process in ecosystem recovery, and several recent studies have proposed novel methods for overcoming this important biological barrier, particularly in tropical
The Effect of Spatial Structure of Pasture Tree Cover on Avian Frugivores in Eastern Amazonia
TLDR
Visitation was positively correlated with focal tree distance to forest edge and crown area, and the positive relationship between distance and visitation rates may be due to the increased abundance of some resource further from forests.
Barriers to Lowland Tropical Forest Restoration in the Sierra Nevada de Santa Marta, Colombia
Extensive areas of the tropics have been converted into pasture for cattle ranching. Frequently, abandoned pasture does not revert to forest. The goal of this project was to identify barriers to
Neighborhood effects on seed dispersal by frugivores: testing theory with a mistletoe-marsupial system in Patagonia.
TLDR
This study overcome technical limitations in the empirical estimation of seed dispersal by using a novel 15N stable isotope enrichment technique together with Bayesian mixing models that allowed us to identify dispersed seeds from focal plants without the need of extensive genotyping.
...
...