2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 12:00 PM - 12:15 PM | SPATIAL VARIATION AND ASYNCHRONY ON BRANCHING RIVER NETWORKS | 310 B
SPATIAL VARIATION AND ASYNCHRONY ON BRANCHING RIVER NETWORKS
River geometry influences processes such as population persistence, genetic structure, and species diversity. Recent research has linked branching river geometry with asynchrony in population fluctuations across sites which, in turn, promote regional persistence and stability. However, river networks are overlain with a template of spatial environmental variation whose effects on synchrony and stability are not well characterized. Using spatially-explicit models, I explore how consumer-resource dynamics are jointly influenced by the branching nature of river networks and spatial environmental variation. A number of case studies are considered, including those where spatial variation is random as well as those where model parameters vary with respect to network position. In the absence of spatial variation, consumer-resource fluctuations synchronize across clusters of linked local habitats; the size of these clusters and degree of asynchrony among them strongly influences regional stability. Random spatial variation tends to interrupt clustering among local habitats, while spatial variation linked to network position typically enhances it. However, the effects on regional stability can be somewhat idiosyncratic in both cases. Spatial shifts in parameter values can lead to local stability at certain sites without necessarily greatly contributing to stability regionally.
- Modeling
- Dispersal
- Predator-prey
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Presenters/Authors
Kurt Anderson
(), University of California, Riverside, kurt.anderson@ucr.edu;
ASHA DISCLOSURE:
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