Seed dispersal increases local species richness and reduces spatial turnover of tropical tree seedlings

@article{Wandrag2017SeedDI,
  title={Seed dispersal increases local species richness and reduces spatial turnover of tropical tree seedlings},
  author={Elizabeth M. Wandrag and Amy E. Dunham and Richard P. Duncan and Haldre S. Rogers},
  journal={Proceedings of the National Academy of Sciences},
  year={2017},
  volume={114},
  pages={10689 - 10694}
}
Significance Dispersal is considered a key process underlying the high spatial diversity of tropical forests, with the seeds of most tropical tree species dispersed by vertebrates, particularly birds. Although it has proven very difficult to quantify the contribution of dispersal to tree species diversity, it is increasingly important to do so in the face of global declines in vertebrate disperser populations. We show that the complete loss of native seed dispersers on the island of Guam is… 
Animal seed dispersal and the diversity of tropical forest trees
  • S. Harrison
  • Biology, Medicine
    Proceedings of the National Academy of Sciences
  • 2017
TLDR
While the study by Wandrag et al. (10) takes place on small tropical islands where trees are not exceptionally diverse, their results nonetheless lend significant new insights into the processes underlying diversity in tropical forests and other ecological communities.
Post-Dispersal Seed Removal in a Large-Seeded Palm by Frugivore Mammals in Western Ecuador
TLDR
This study highlights the importance of medium- and large-sized rodents for the removal and effective dispersal of large seeds in disturbed tropical habitats and suggests that the loss of forest cover in the agroforestry system has reduced the richness of seed removers, which subsequently caused decreased removal rates.
Long Distance Seed Dispersal by Forest Elephants
By dispersing seeds long distances, large, fruit-eating animals influence plant population spread and community dynamics. After fruit consumption, animal gut passage time and movement determine seed
Joint evolution of mycorrhizal type, pollination, and seed dispersal mode in trees
TLDR
Overall, evolution of mycorrhizal type, seed dispersal mode, and pollination mode were linked, strongly suggesting that mycor Rhizal symbiosis drives the evolution of seed and pollinated modes and contributes to tree diversification.
Introduction of mammalian seed predators and the loss of an endemic flightless bird impair seed dispersal of the New Zealand tree Elaeocarpus dentatus
TLDR
It is found that canopy fruit handling rates (an index of dispersal quantity) were poor even on island sanctuaries, which suggests that hinau may be adapted for ground‐based dispersal by flightless birds, rather than simply relying on logical assumptions.
Såli (Micronesian starling – Aplonis opaca) as a key seed dispersal agent across a tropical archipelago
TLDR
Overall, this work provides the most comprehensive assessment to date of frugivory by the Såli and confirms its importance as a seed disperser on Guam and throughout the Marianas.
Uniting niche differentiation and dispersal limitation predicts tropical forest succession.
TLDR
The Source-Disperser Limitation Framework (SDLF) provides a way to better predict secondary tropical forest succession across gradients of landscape disturbance by integrating seed sources and frugivore behavior.
Chimpanzees as ecosystem service providers: Seed dispersal of an economically important plant resource at Fongoli, Senegal
Vertebrate-mediated seed dispersal is a vital mutualistic interaction in tropical ecosystems that is beginning to be recognized for its role in sustaining populations of plant resources on which
Fruit bat diversity patterns for assessing restoration success in reforestation areas in the Philippines
Abstract In response to extensive deforestation in the Philippines in the last century, reforestation initiatives have been developed, setting area- or seedling count-based success criteria. However,
Differing severity of frugivore loss contrasts the fate of native forests on the land of the Dodo (Mascarene archipelago)
Abstract Frugivore loss has the potential to alter the regeneration of tropical hyperdiverse forests. However, no study has investigated tree diversity maintenance within old-growth protected forests
...
1
2
3
4
...

References

SHOWING 1-10 OF 67 REFERENCES
Disperser limitation and recruitment of an endemic African tree in a fragmented landscape.
TLDR
Extended observations of disperser activity, a seed placement experiment, seed predator censuses, and reciprocal seedling transplants from forest and fragment sources failed to support the alternative hypotheses for poorer seedling and juvenile recruitment in fragments, leaving reduced seed dispersal as the most plausible mechanism.
Pervasive density-dependent recruitment enhances seedling diversity in a tropical forest
TLDR
Observations in a lowland, moist forest in the Republic of Panamá found that negative density-dependent recruitment contributes significantly to the increase in diversity from seeds to seedling recruits.
Role of dispersal in the recruitment limitation of neotropical pioneer species
TLDR
Evidence is found that limited seed dispersal is an important factor contributing, together with factors affecting post-dispersal recruitment success, to seedling distribution patterns in gaps, and regression models incorporating predicted seed rain were significantly better predictors of seedling recruitment than models in which recruitment probability was assumed constant in all sites.
Beta-Diversity in Tropical Forest Trees
TLDR
It is found that beta-diversity is higher in Panama than in western Amazonia and that patterns in both areas are inconsistent with the neutral model, suggesting that dispersal limitation, with speciation, influences species turnover.
Effects of local disturbance of tropical forests on frugivores and seed removal of a small-seeded afrotropical tree.
TLDR
Local forest disturbance appears to have a more general negative impact on frugivores and their seed dispersal services than anticipated previously, which suggests that large-seeded tree species and trees with small fruits are losing seed dispersers.
Seed arrival, ecological filters, and plant species richness: a meta-analysis.
TLDR
Experimental support is provided for the general hypothesis that species pools and local environmental heterogeneity interactively structure plant communities and discusses implications for community assembly, species coexistence, and the maintenance of biodiversity.
Herbivores and the Number of Tree Species in Tropical Forests
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.
Beta-diversity in temperate and tropical forests reflects dissimilar mechanisms of community assembly.
TLDR
It is suggested that biogeographical differences in the relative importance of different community assembly mechanisms contribute to these striking gradients in global biodiversity.
Dispersal and Species Diversity: A Meta‐Analysis
  • M. Cadotte
  • Biology, Medicine
    The American Naturalist
  • 2006
TLDR
It is found that immigration increased local diversity, and in animal studies, diversity appears maximized at intermediate dispersal rates but not with plant studies; however, more standardized studies are needed.
Natural Experiment Demonstrates That Bird Loss Leads to Cessation of Dispersal of Native Seeds from Intact to Degraded Forests
TLDR
An absence of seed rain in degraded forests on Guam is shown, correlated with the absence of birds, whereas on Saipan, frugivorous birds regularly disperse seeds into degraded forests, providing a mechanism for re-colonization by native plants.
...
1
2
3
4
5
...