Presented By: The Center for the Study of Complex Systems
CSCS Seminar | Cooperation, stochasticity, and stability, or: when will the world appear neutral, and when won’t it?
James Patrick O'Dwyer, University of Illinois, Department of Plant Biology
ZOOM MEETING
https://umich.zoom.us/j/96616169868
Passcode: CSCS
Abstract: Models of microbial interactions have been developed in recent years, drawing from taxonomic abundances via amplicon sequencing. Many of these models assume that dynamics through time are primarily driven by pairwise interactions between taxa, but with the drawback that how these interaction strengths may change with environmental context is less than clear. Here we model the consumption and exchange of resources explicitly, and show that these processes imply new results and principles for the stability of ecological communities. We go on to develop stochastic versions of these models, and demonstrate a transition between regimes that resemble neutral and niche-dominated dynamics and static patterns. Finally, I’ll show some recent work on more general stochastic models with individual variation, and their consequences for coexistence and stability.
https://umich.zoom.us/j/96616169868
Passcode: CSCS
Abstract: Models of microbial interactions have been developed in recent years, drawing from taxonomic abundances via amplicon sequencing. Many of these models assume that dynamics through time are primarily driven by pairwise interactions between taxa, but with the drawback that how these interaction strengths may change with environmental context is less than clear. Here we model the consumption and exchange of resources explicitly, and show that these processes imply new results and principles for the stability of ecological communities. We go on to develop stochastic versions of these models, and demonstrate a transition between regimes that resemble neutral and niche-dominated dynamics and static patterns. Finally, I’ll show some recent work on more general stochastic models with individual variation, and their consequences for coexistence and stability.
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Livestream Information
ZoomOctober 26, 2021 (Tuesday) 11:30am
Meeting ID: 96616169868
Meeting Password: CSCS
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