OOS 25 - Trait Evolution and the Dynamics of Food Webs

Wednesday, August 10, 2011: 8:00 AM-11:30 AM
15, Austin Convention Center
Organizer: François Massol
Co-organizers: Vincent Calcagno and Jelena H. Pantel
Moderator: François Massol
Food webs are ecological systems that include species interacting through consumptive relationships. Contrary to purely competitive systems, food webs can theoretically display very rich dynamics – from equilibrium to chaos –, and the occurrence of these dynamics largely depends on the value of species traits. In this context, the evolution of species traits is the result of a two-way process: on the one hand, trophic interactions set the stage for a complex adaptive landscape that shapes the distribution of species traits; on the other hand, evolving trait values affect the nature of food web dynamics and, thus, the pace and intensity of trophic interactions. This two-way process allows the emergence of intriguing phenomena such as “Red Queen” dynamics between host’s and parasite’s attributes (van Valen 1973) or the evolutionary building of abundance oscillations (Abrams & Matsuda 1997). More than thirty years after van Valen’s (1973) seminal paper, several major breakthroughs – theoretical and empirical – have pushed this field forward (e.g. van Baalen & Sabelis 1995; Abrams & Matsuda 1997; Caldarelli et al. 1998; Loeuille et al. 2002; Drossel & McKane 2003; Tokita & Yasutomi 2003; Yoshida et al. 2003; Hairston et al. 2005; Loeuille & Loreau 2005; Sabelis et al. 2005). The endeavor of this symposium is to bring together a very wide group of people actively working on the dynamical consequences of trait evolution in food webs to synthesize the state-of-the-art in this very quickly changing field. Speakers will consist of both theoreticians and empiricists, and of both renowned senior researchers and young scientists. The symposium will explore diverse questions linked to the evolution of traits in food webs, such as dispersal evolution, host-parasite dynamics, community diversification, food web structure, or the evolution of mating systems. The introduction and conclusion of the session will provide symposium attendees with an overview of current research on the dynamical consequences of trait evolution in food webs, and hopefully stir theoretical and empirical ideas on this topic.
8:00 AM
Ecological and evolutionary contributions to community-wide trait change
Jelena H. Pantel, KU Leuven - University of Leuven; Nicolas Loeuille, UPMC
8:20 AM
Ecological context influences parasite-driven evolution and host-parasite dynamics
Meghan A. Duffy, University of Michigan; Jessica M. Housley, Georgia Institute of Technology; Rachel M. Penczykowski, Georgia Institute of Technology; Christopher A. Klausmeier, Michigan State University; Spencer R. Hall, Indiana University
9:00 AM
A link between the communities of parasites of insect larvae and adults mediated by the host's immune system
Simon Fellous, Centre National de la Recherche Scientifique; Brian P. Lazzaro, Cornell University
9:20 AM
Red Queen dynamics in three-species trophic chains
Regis Ferriere, University of Arizona
9:40 AM
9:50 AM
CANCELLED - A test for indirect effects of fish parasites on invertebrate communities
Felipe Perez-Jvostsov, McGill University; Andrew P. Hendry, McGill University; Gregor F. Fussmann, McGill University; Marilyn E. Scott, McGill University
10:10 AM
The evolution of omnivore and generalist feeding, and the emergence of network complexity in metacommunity food webs
Pradeep Pillai, Northeastern Unviversity; Andrew Gonzalez, McGill University; Michel Loreau, Station d'Ecologie Expérimentale du CNRS à Moulis
10:30 AM
The structure and dynamics of Pleistocene food-webs in Beringia: Using stable isotopes to inform ecological networks across the last glacial period
Justin D. Yeakel, Simon Fraser University; Paulo Guimarães Jr., Universidade de São Paulo; Lars Rudolf, University of Bristol; Thilo Gross, University of Bristol; Paul L. Koch, University of California
10:50 AM
The food-webs inside the human body
Carmen Lia Murall, University of Guelph; Chris Bauch, University of Guelph and Princeton University; Kevin S. McCann, University of Guelph
11:10 AM
Consumption rates and trophic interaction strengths are constrained by dimensionality of consumer search space
Samraat Pawar, University of Chicago; Anthony I. Dell, University of Gottingen; Van M. Savage, UCLA
See more of: Organized Oral Session
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