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A resilience concept based on system functioning: A dynamical systems perspective.

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This study proposes a new system functioning approach to resilience, shifting focus from system state to its ability to maintain function despite changes. Flexibility is key, as regime shifts don't always mean loss of resilience.

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Area of Science:

  • Ecology
  • Systems Ecology
  • Theoretical Ecology

Background:

  • Traditional resilience focuses on a system's ability to absorb disturbances and maintain a stable state.
  • Regime shifts, or transitions between stable states, are often viewed as a loss of resilience.
  • A state-based approach may overlook a system's capacity to maintain functioning through different states.

Purpose of the Study:

  • To introduce a novel framework for resilience based on system functioning rather than system state.
  • To re-evaluate the concept of resilience in light of multiple stable states and flexibility.
  • To classify system responses to disturbances and identify resilience mechanisms.

Main Methods:

  • Proposed a shift from a state-based to a system functioning-based approach to resilience.
  • Emphasized the role of flexibility in maintaining system functioning across different stable states.
  • Classified disturbances (fluctuations, shocks, press disturbances, trends) based on timescales and properties.
  • Distinguished between resilience mechanisms: tolerance and flexibility (system properties), and adaptation and transformation (system processes).
  • Discussed quantitative methods using dynamical systems theory for investigating resilience in model systems.

Main Results:

  • Not all regime shifts indicate a loss of resilience; system functioning can be maintained across different stable states.
  • Flexibility, the ability to shift between states while preserving function, is crucial for resilience.
  • System responses vary based on disturbance type and timescale.
  • Resilience is supported by inherent properties (tolerance, flexibility) and dynamic processes (adaptation, transformation).

Conclusions:

  • The system functioning approach offers a more nuanced understanding of resilience.
  • Flexibility is a critical component of resilience, enabling systems to navigate change.
  • Understanding disturbance types and resilience mechanisms is vital for managing complex systems.
  • Dynamical systems theory provides tools for quantitative resilience assessment.