Lecture 11 - November 5, 2009 |
Essential |
Background |
Outline
- stability and resilience
- thresholds
- collapse
- ecosystem restoration
Using viewers and Multiple Perspectives
- network vocabulary to describe resilience, threshold, multiple steady states
- soil water, rain, transpiration in a forested watershed - has the salient features of the "systems view"
- systems ideas of feedback related to network idea of an attractor
Life lessons that our grandmas taught us:
An ounce of prevention is worth a pound (or many pounds) of cure.
When you take something apart, save all the pieces.
"You touch that vase, and I'll spank your butt!"
|
|
|
Stability, resistance, resilience
feedback that stablizes a particular state
|
stability |
|
thresholds and multiple stable states
|
threshold
multiple stable states
mss with resilience
Scheffer-2009 |
example:
amazon forest feedbacks |
collapse - the special case/
loss of complex resilience
|
|
|
ecosystem restoration
global ecosystems are highly dynamic with rapid turnover
self-organized communities
need to be close to converge (Freeway merge)
|
|
extremely
difficult path
norgaard - coevolution |
| use of the resiliency concept to promote restoration |
Scheffer-2009 |
|
| |
|
|
|
|
|
