• Corpus ID: 15023564

Advantages of seed dispersal: A re-evaluation of directed dispersal

@article{Wenny2001AdvantagesOS,
  title={Advantages of seed dispersal: A re-evaluation of directed dispersal},
  author={Daniel G. Wenny},
  journal={Evolutionary Ecology Research},
  year={2001},
  volume={3},
  pages={37-50}
}
  • D. Wenny
  • Published 2001
  • Environmental Science
  • Evolutionary Ecology Research
Seed dispersal can be advantageous (1) in escape from density- or distance-dependent seed and seedling mortality, (2) by colonization of suitable sites unpredictable in space and time, and (3) by directed dispersal to particular sites with a relatively high probability of survival. Most previous research on the consequences of seed dispersal has focused on escape and colonization because adaptations ensuring directed dispersal are not expected under the paradigm of diffuse mutualism that… 
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References

SHOWING 1-10 OF 233 REFERENCES
Ecology of Seed Dispersal
TLDR
A general objective of this paper is to explore the degree to which dispersal process and mode are integrated and, in so doing, to catalyze their union.
Seed shadows, seed predation and the advantages of dispersal
TLDR
The paper argues that ecological phenomena that have selected for these ‘adaptations’ are operational at a local scale and argues that for a proper evaluation of dispersal, it is mandatory to explore the ecological consequences of this phenomenon, besides the dispersal event itself.
Seed Dispersal by Animals: Contrasts with Pollen Dispersal, Problems of Terminology, and Constraints on Coevolution
TLDR
There are problems with drawing analogies between the two systems and using terminology derived from studies of pollination to design and interpret studies of seed dispersal.
The ecology of seed dispersal.
TLDR
This chapter is to review the existing literature on seed dispersal, highlighting essential but missing kinds of information about dispersal mechanisms and the consequences of dispersal at population and community levels.
Seed-Seedling Conflicts, Habitat Choice and Patterns of Plant Recruitment
TLDR
It is demonstrated that seed-seedling conflicts can have a major impact on both the overall quantity of recruitment at the landscape level and on the distribution of recruitment among patches, and a previously unrecognized role in habitat choice.
Directed Dispersal: Demographic Analysis of an Ant-Seed Mutualism
TLDR
The effects of seed dispersal by ants on the demography of two seed cohorts of Corydalis aurea are examined: one relocated to ant nests by undisturbed ant foragers, and a control cohort of equal numbers planted by hand in the vicinity of each nest.
Seed dispersal and environmental heterogeneity in a neotropical herb: a model of population and patch dynamics
TLDR
For the model best representing the demographic response of Calathea ovandensis to succession, the results of the computer simulations predict strong selection for local dispersal to safe sites, and selection against long-distance dispersal, which are consistent with observed patterns of seed dispersal.
Directed seed dispersal by bellbirds in a tropical cloud forest.
  • D. Wenny, D. Levey
  • Environmental Science
    Proceedings of the National Academy of Sciences of the United States of America
  • 1998
A fundamental goal of plant population ecology is to understand the consequences for plant fitness of seed dispersal by animals. Theories of seed dispersal and tropical forest regeneration suggest
Gene Flow in Seed Plants
TLDR
Gene dispersal (flow) within and between plant populations has been of continuous interest to plant breeders and seed producers for many decades, but only during the past two decades have a large body of plant evolutionists become interested in information accruing from these studies, and in the rates of gene flow in wild populations.
Plant colonization: are wind dispersed seeds really dispersed by birds at larger spatial and temporal scales?
TLDR
It is suggested that many plant species often thought of as wind dispersed may in fact be largely dispersed by animals, mostly birds, at larger spatial and temporal scales and exploratory movements, often by young birds, may play an important role in such dispersal.
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