University of Tasmania

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Knowing when (not) to attempt ecological restoration

journal contribution
posted on 2023-05-22, 00:16 authored by Craig JohnsonCraig Johnson, Chabot, RH, Marzloff, MP, Wotherspoon, S
Here we argue that there are two important steps in the decision process to restore ecological system that are often ignored. First, consideration of restoration is in response to observed change in a system, but ecological systems can fluctuate widely in their normal dynamic. Thus, there is an imperative to interpret ecological change; shifts in community structure that represent “typical” fluctuations in a properly functioning ecosystem do not warrant restoration, while change associated with phase shift in the system may well demand restoration action. Second, where restoration effort is warranted, it needs to be determined whether management responses are likely to be successful within resource constraints. Where ecological change involves pronounced hysteresis, even massive effort may have little chance in effecting recovery to a preferred ecosystem state. Theory and models indicate that consideration of the characteristic length scales (CLSs) of ecological systems provides an unambiguous interpretation of ecological change, enabling differentiation of “typical” fluctuations from phase shift, and here we show that CLSs can be calculated for real communities from their species’ dynamics, and that their behavior is as predicted from theory. We also show that for ecological systems where local interactions and forcings are well understood, validated simulation models can provide a ready means to identify hysteresis and estimate its magnitude. We conclude that there are useful tools available for ecologists to address the key questions of (1) whether restoration attempts are warranted in the first place and, if they are, (2) whether it is practical to pursue them.


Publication title

Restoration Ecology








Institute for Marine and Antarctic Studies


Blackwell Publishing Inc

Place of publication

350 Main St, Malden, USA, Ma, 02148

Rights statement

Copyright 2016 Society for Ecological Restoration

Repository Status

  • Restricted

Socio-economic Objectives

Assessment and management of terrestrial ecosystems

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