Tuesday, July 11

MS16
Effects of Forcing on the Dynamical Behavior of Population Models - Part I of II

10:30 AM-12:30 PM
Rio Mar 8

For Part II, see MS26.

The effects of external factors on single or interacting populations in an ecosystem have long-term consequences for the demographic and genetic compositions of species in the ecosystem. Time-dependent variations in food supply and habitat have been shown experimentally to cause oscillations in population numbers, e.g., the work of Jillson and the work of Costantino, Cushing and collaborators. Waltman and colleagues have developed models to help understand the dynamics of forced populations in the chemostat. The speakers in this minisymposium will describe models which help to explain the effects of temporal and spatial environmental factors on population dynamics. They will discuss the effects of external manipulations such as harvesting, stocking, and migration on the composition of populations.

10:30-10:55 Periodically Forced, Structured Population Models

James M. Cushing, University of Arizona, USA

11:00-11:25 Ecological Invasions: The Effects of Temporal Fluctuations and Spatial Heterogeneity

Michael G. Neubert, Woods Hole Oceanographic Institution, USA

11:30-11:55 Cancelled Subharmonic Analysis of Realistic Population Models

Aaron A. King, University of Arizona, USA

12:00-12:25 Moved to MS26 Strong, Weak, and Average Persistence in Population Models

Sean F. Ellermeyer, Kennesaw State University, USA; Sergei S. Pilyugin, University of Florida, USA; and Ray Redheffer, University of California, Los Angeles, USA