McTavish, K. A. University of Minnesota, kmctavish@earthlink.net
Gettel, G. A. Cornell University,
Pastor, J. J. Natural Resources Research Institute, jpastor@d.umn.edu
Stech, H. W. University of Minnesota, Duluth, hstech@d.umn.edu

 
TROPHIC STRUCTURE AND OTHER ECOSYSTEM PROPERTIES GENERATED BY A STOICHIOMETRIC FOOD WEB MODEL
 
A stoichiometric food web model will be presented that couples stoichiometric constraints imposed at the population level with mass balance constraints imposed at the ecosystem level. In this modeling approach, links between ecosystem components evolve through time with shifts in the relative availability of different resource populations and with changes in the levels of material and energy contained in each food web component. We will suggest measures and visualization methods useful in analyzing ecosystem structure and function in this context and will present preliminary results of numerical simulations. These results provide insight into ways in which trophic structure may emerge in ecosystems, the dual role of consumers in directly regulating resource populations and in impacting nutrient cycling rates, and the relative stability of various food web configurations.
 
Day: Tuesday, Feb. 2
Time: 04:00 - 04:15pm
Location: Sweeney Center
 
Code: SS49TU0400S