17: Restoration and Resiliency Flashcards
Goal of restoration ecology
Return ecological function to degraded areas
Restoration ecology tends to occur…
after ecosystems are highly degraded
Four options for restoration
- No action (passive)
- Rehabilitation
- Partial restoration
- Complete restoration
Slide 9
Reclamation of oil sands land
The three ‘great filters’ or assembly rules
- Biotic (species interaction)
- Abiotic (environment fit)
- Dispersal (ability to arrive)
Slide 11
Ball and cup
What conservation dilemma do endangered species pose?
May lack resilience; so too may their ecosystems
What is resilience
Ability of a system to absorb disturbances while retaining same basic structure/fxn
What is hysteresis
The path to ecosystem recovery does not equal the reverse of the path of ecosystem damage
Slides 26-29 ** VERY IMPORTANT
ball and cup, will probably have to draw it or something
In the ball and cup theory, the movement of one regime to another means…
Disturbances have overcome resilience (helpful or unhelpful)
What is resilience
amount of disruption (stressors) before one set of dynamics is replaced by another
Easier to detect biological thresholds for _________ than __________
species than ecosystems
What is an alternate stable state
nontransitory states within which communities can exist.
Change in parameters that define state space?
Extreme conditions mean only one state exists (no regime shifts)?
What is the main problem with invasive species “management”?
Often occurs too late
Degree of infestation too large, control costs are high
