Heterogeneity among and competition between life stages together extend the stability boundary of complex ecological communities
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arXiv: 2610.23557v1 · Summary page
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Ecological stability depends on who grows up
Classical ecological models often predict that adding species and interactions makes a community less stable. Yet real ecosystems can sustain remarkable diversity. A new theoretical study examines one simplifying assumption behind that tension: treating every member of a species as ecologically interchangeable, regardless of life stage.
When the researchers allowed interactions with other species to change across life stages, their model communities could remain stable across a wider range of conditions. But that benefit required strong competition between stages within a species. The result is not a blanket claim that age structure stabilizes ecosystems. It identifies a specific combination—different ecological roles across development, coupled with internal competition—that expands the conditions for local stability in the model.
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