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Warming-Induced Changes to Body Size Stabilize Consumer-Resource Dynamics.

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    The temperature-size rule (TSR) may buffer ecosystems from warming. This ecological principle helps maintain consumer-resource biomass ratios and prevent extinctions in warming environments, according to our models.

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    Area of Science:

    • Ecology
    • Climate Change Biology
    • Theoretical Ecology

    Background:

    • Body size and temperature are key drivers of consumer-resource dynamics.
    • The temperature-size rule (TSR) describes a negative relationship between temperature and organismal body size.
    • The impact of TSR on community dynamics under warming remains unclear.

    Purpose of the Study:

    • To investigate how the TSR influences the predicted response of consumer-resource systems to environmental warming.
    • To integrate temperature- and size-dependent models to assess indirect warming effects via body size changes.

    Main Methods:

    • Developed integrated models combining temperature- and size-dependent factors.
    • Simulated consumer-resource systems under various warming scenarios and TSR effects.
    • Analyzed effects on community biomass ratios and extinction risk.

    Main Results:

    • The TSR is predicted to maintain consumer-resource biomass ratios under warming.
    • The TSR is expected to buffer communities against extinctions when temperatures rise.
    • These findings hold across realistic TSR variations and functional response types below thermal optima.

    Conclusions:

    • The widely observed temperature-size rule may mitigate the negative impacts of climate warming on ecological communities.
    • TSR acts as a stabilizing factor in consumer-resource dynamics facing rising temperatures.
    • Further research should explore TSR effects across broader thermal ranges.