95th ESA Annual Meeting (August 1 -- 6, 2010)

OOS 48 - Causes and Consequences of Individual Variation in Dispersal

Thursday, August 5, 2010: 1:30 PM-5:00 PM
315-316, David L Lawrence Convention Center
Shannon J. McCauley
Michael F. Benard
Michael F. Benard
Dispersal, the movement of individuals between populations, is one of the most fundamental components of ecology and affects processes as diverse as population growth, metapopulation dynamics, and adaptation. A longstanding assumption of many studies on the ecological consequences of dispersal has been that dispersers are a random fraction of the population. Yet empirical data are increasingly revealing that dispersing individuals are not a random subset of the population; instead, dispersers often differ from non-dispersers in phenotype and genotype. Consequently, studies of population- and community-level processes that lump all dispersers into a simple aggregate may incorrectly assess the chance of extinction, rate of population growth, potential for adaptation or genetic differentiation, and impact on other species. Our organized oral session will explore the prevalence and implications of individual-variation in dispersal through presentations that discuss research investigating why individuals vary in their dispersal strategies and how individual variation in dispersal affects populations and communities. The speakers in this session reflect the diversity of scale at which the effects of individual variation on dispersal are being identified. By bringing together researchers working over a diverse range of systems and scales, we believe this session and associated discussion will help to develop a synthetic approach to understanding the role of individual variation in dispersal in ecological and evolutionary processes.
1:30 PM
Importance of spatial and individual heterogeneity for wind-dispersed plants
Dirk Baker, Campbell Scientific, Inc.; Ellen I. Damschen, University of Wisconsin-Madison; Gil Bohrer, Ohio State University; Jay R. Turner, Washington University
1:50 PM
Foraging rates of larval dragonfly colonists are positively related to habitat isolation: Results from a landscape-level experiment
Shannon J. McCauley, Cal Poly State University; Tomas Brodin, Umeå University; John I. Hammond, University of New Mexico
2:10 PM
CANCELLED - The evolution of immigrant-based dispersal decision
Jean Clobert, Station d'Ecologie Experimentale du CNRS
2:30 PM
Measuring individual variation in dispersal and its demographic consequences
Luca Borger, University of Guelph; John M. Fryxell, University of Guelph
2:50 PM
3:10 PM
3:20 PM
Landscape genetic consequences of natal habitat preference induction
Karen E. Mabry, New Mexico State University
3:40 PM
Differences in population differentiation between an outcrossing and selfing species
Jessica Shade, UC Berkeley; Ellen Simms, University of California Berkeley
4:00 PM
Plant structure and spatial arrangement affect seed release and projected invasion speeds of invasive thistles
Katherine M. Marchetto, Cornell University; Eelke Jongejans, Radboud University; Katriona Shea, The Pennsylvania State University; Matthew B. Williams, The Pennsylvania State University; Richard Auhl, The Pennsylvania State University; Scott A. Isard, The Pennsylvania State University
4:20 PM
The effect of climate change on dispersal in a house sparrow Passer domesticus metapopulation
Henrik Pärn, Centre Conservation Biology, Norwegian University for Science and Technology; Thor Harald Ringsby, Norwegian University for Science and Technology; Henrik Jensen, Norwegian University of Science and Technology; Bernt-Erik Sæther, Norwegian University of Science and Technology
4:40 PM
Variation in dispersal traits during invasion of the Soapberry Bug - invasion gradient vs. habitat effects
Peter Søgaard Jørgensen, University of Copenhagen; Scott P. Carroll, Institute for Contemporary Evolution & UC Davis; Sharon Y. Strauss, University of California, Davis
See more of: Organized Oral Session