5th International Symposium-Workshop on Frugivores and Seed Dispersal (1985-2010)
FSD 2010 - Cheptou
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Wednesday 17 June 16:00-18:00 (Einstein)
Evolution of dispersal (Abstracts)
Organizer : Pierre-Olivier Cheptou (CNRS-CEFE) pierre-olivier.cheptou(a)cefe.cnrs.fr , Hélène Fréville (MNHN-CEFE) & Isabelle Olivieri (ISEM)
Dispersal is a ubiquitous trait in living organisms. In plants, adaptations to dispersal are highly diversified, from passive dispersal of seeds to active seed dispersal involving highly complex chemical or visual signals designed to attract dispersing agents. Despite the great diversity of adaptations, only a few selection pressures favor the evolution of dispersal. The cost of dispersal structures or the increased mortality risk that organisms face during the dispersal phase select against dispersal. In contrast, competition between relatives or temporal variability of the environment generally favors dispersal. Since the recent development of tools in population biology (molecular markers, methods for analyzing demographic data, etc), it is now possible to better characterize the features of dispersal and to infer the drivers of its evolution. Variations in selective pressures arising from global changes, such as habitat fragmentation or the spread of a new species in a new geographic area provide exciting opportunities for studying the evolution of dispersal in a context where ecological and evolutionary drivers are more easily identified. Our symposium aims at presenting the state of the art in this topic in order to discuss emergent research themes based on both theoretical and experimental studies.
Speakers and titles (Abstracts)
|
# |
Speaker |
Title |
|
1 |
Olivieri, I. |
An overview of evolutionary models for the evolution of dispersal |
|
2 |
Schurr, F. |
Can long-distance seed dispersal respond to natural selection? |
|
3 |
Ehlers, B. K. |
Geographic varation in seed dispersal; islands vs mainland and central vs marginal populations |
|
4 |
Riba, M. |
Evolution of dispersal and fragmentation: testing some model predictions using natural experiments |
|
5 |
Cheptou, P.-O. |
Rapid evolution of seed dispersal in urban environment in the weed Crepis sancta |
|
6 |
Rojas, D. |
When did fruits become important to leaf-nosed bats?: the evolution of frugivory in phyllostomids |
|
7 |
Spiegel, O. |
Incorporating density-dependence into the directed dispersal hypothesis |
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