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Resilience Theory

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Panarchy: Understanding Transformations in Human and Natural Systems. ... Panarchy. Panarchy. Resilience Theory. Gunderson, L. H., and C. S. Holling. 2002. ... – PowerPoint PPT presentation

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Title: Resilience Theory


1
Resilience Theory
Holling, C.S. 1973. Resilience and Stability of
Ecological Systems. Annual Review of Ecology and
Systematics 197341-23
PERSISTENCE the persistence of relationships
within a system ADAPTABILITY ability of
systems to absorb changes of state variables,
driving variables and parameters, and still
persist. TRANSFORMABILITY the size of a
stability domain or the amount of disturbance a
system could take before it shifted into
alternative configuration
2
Walker, B. H., Ludwig, D., Holling, C.S.and
Peterman, R. M. (1981), Stability of semi-arid
savanna grazing systems, Journal of Ecology, 69,
473-498.
Grassy Regime
Overgrazing, drought
Water retention, Soil structure modification
Shrubby Regime
Semi Arid Rangelands
3
Resilience Theory
C.S. Holling. 1986. The resilience of terrestrial
ecosystems local surprise and global change.
Pages 292-320 in Sustainable development of the
biosphere W. C. Clark and R. E. Munn (eds).
4
Resilience Theory
Cycles of Growth, Conservation, Disturbance
Renewal
5
LOSS OF ECOLOGICAL RESILIENCE
  • Decline in functional diversity
  • trophic shifts (fishing, predator control)
  • removal key biota (selective grazing)
  • Acceleration of slow variables
  • Increase in nutrients/pollution
  • Alteration of disturbance regimes
  • magnitude, frequency, timing
  • Uniform spatial patterns
  • Even aged stands of timber

L. H. Gunderson and L. Pritchard. 2002.
Resilience and the Behavior of Large Scale
Ecosystems . Island Press Washington DC
6
Resilience Theory
Increasing Temporal Scale
Increasing spatial scale
7
Panarchy
Resilience Theory
Gunderson, L. H., and C. S. Holling. 2002.
Panarchy Understanding Transformations in Human
and Natural Systems. Washington, DC Island
Press.
8
Resilience Theory
Panarchy
Gunderson, L. H., and C. S. Holling. 2002.
Panarchy Understanding Transformations in Human
and Natural Systems. Washington, DC Island
Press.
9
When Resilience isnt always a good thing.
  • High Resilience
  • Rigidity Trap
  • Lock in Trap
  • Low/Eroded Resilience
  • Poverty Trap
  • Gilded Trap

10
Brief Comparison Ecological/Social Resilience
11
Brief Comparison Ecological/Social Resilience
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