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NCEAS Activity Report

NCEAS Working Group on Population Management

Biodiversity Workshop: January 14-16, 1999 (Informational web page)

Poleward shifts in geographical ranges of butterfly species associated with regional warming

Publications Vision Committee: Final Report

Tree-grass interactions workshop

Inferring colonization processes from population dynamics in spatially structured predator-prey systems

Spatial ecology: The role of space in population dynamics and interspecific interactions

Umbrellas and flagships: Efficient conservation surrogates or expensive mistakes?

Self-disturbance as a source of spatiotemporal heterogeneity: The case of the tallgrass prairie

Tallgrass prairies are characterized by high levels of litter production, which has a profound effect on live biomass. Litter introduces a delayed inhibition of biomass growth, generating nonlinear dynamics and chaos. In this paper, we study a model of biomass–litter interaction, and focus on the litter persistence rate. The observed dynamics depends largely on this rate of year-to-year persistence. Different scenarios are explored and discussed. A spatially extended counterpart of such a model is later on introduced to account for the effects of space.