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Field Collection and Laboratory Maintenance of Canopy-Forming Giant Kelp to Facilitate Restoration
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Optimal conservation outcomes require both restoration and protection.

Hugh P Possingham1, Michael Bode2, Carissa J Klein3

  • 1Australian Research Council Centre of Excellence for Environmental Decisions, School of Biological Sciences, University of Queensland, Brisbane, Australia; Imperial College London, Department of Life Sciences, Silwood Park, Berkshire, England, United Kingdom.

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Summary

Conservation strategies should integrate habitat protection and restoration. A new theory shows restoration can be prioritized over protection, depending on costs and time lags, optimizing biodiversity and ecosystem services.

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Area of Science:

  • Conservation Science
  • Landscape Ecology
  • Ecological Restoration

Background:

  • Conservation efforts traditionally prioritize habitat protection over restoration due to perceived higher efficiency and lower costs.
  • Existing conservation frameworks lack a unified theory to compare the outcomes of protection and restoration actions.
  • Protected intact habitats are generally assumed to yield superior biodiversity and ecosystem services compared to restored habitats.

Purpose of the Study:

  • To develop a unified conservation theory integrating habitat protection and restoration.
  • To investigate the relative importance and optimal integration of protection and restoration for biodiversity and ecosystem services.
  • To challenge conservation orthodoxy by exploring scenarios where restoration may be preferred over protection.

Main Methods:

  • Development of a dynamic landscape model to simulate and compare protection and restoration outcomes.
  • Utilization of nonlinear benefit functions to quantify outcomes for biodiversity and ecosystem services.
  • Derivation of a heuristic equation integrating costs and time lags for both actions.

Main Results:

  • Both habitat protection and restoration are essential components for optimizing conservation outcomes.
  • Under certain conditions, restoration can be a more effective strategy than protection.
  • The relative priority of protection versus restoration is contingent upon their respective costs and inherent time lags.

Conclusions:

  • A unified theory demonstrates that protection and restoration are complementary conservation actions.
  • The optimal conservation strategy depends on a balance between costs and time delays associated with each action.
  • The derived heuristic provides a practical tool for prioritizing conservation efforts, applicable to both biodiversity and ecosystem services.