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Spatially-nested topologies stabilize meta-ecosystems via cross-scale source-sink dynamics
Tianna Peller1, Isabelle Gounand2, Marie-Josée Fortin1
1Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.
Ecology
|April 13, 2026
Summary
Spatial flows of resources and organisms create nested ecosystem structures. This structure stabilizes ecosystem dynamics through cross-scale source-sink dynamics, influencing functions across diverse habitats.
Area of Science:
- Ecological dynamics and spatial ecology.
- Meta-ecosystem theory and landscape ecology.
Background:
- Ecosystems are interconnected by spatial flows of resources and organisms.
- Resource flows typically link nearby, dissimilar ecosystems, while dispersal connects distant, similar ones.
Purpose of the Study:
- To investigate the stabilizing effects of spatially nested ecosystem topologies on ecosystem dynamics.
- To understand how cross-scale source-sink dynamics influence ecosystem stability and function.
Main Methods:
- Utilized meta-ecosystem models to simulate interactions between coupled ecosystems.
- Analyzed the impact of contrasting spatial flow properties on ecosystem structure and stability.
Main Results:
- Spatially nested topologies stabilize ecosystem dynamics through cross-scale source-sink dynamics.
- These dynamics create spatial variation in trophic control and biomass, with distinct source and sink ecosystems.
- Meta-ecosystem functions like primary production and nutrient retention are enhanced.
Conclusions:
- The diversity of ecosystem types and hierarchical spatial flow scales are crucial for ecosystem stability and function.
- Cross-scale source-sink dynamics, driven by consumer dispersal, regulate ecosystem stability and function across scales.
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