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Managing for Resilience:

Defining Resilience

As applies to salmon, resilience might be defined as: the amount of change that the ecosystem can experience and still retain its capacity to support (1) self-sustaining salmon population(s) at characteristic levels of productivity ( unsubsidized that is a net gain), and (2) the ecological functions linked to the population(s) and productivity levels.

• Fewer wild fluctuations…
• Acknowledge explicit links with cultural and economic systems…
• Difficult to manage the tradeoffs between salmon and human systems…
• Need to define what a self-sustaining salmon population is, but is different for different species and populations
• How system responds to the altered ecosystem properties (by human activites) – irreversibility of changes

What is resilience and how would we measure it?

Minimizing risk of catastrophic failure…

Resilience definition?

Is it a system property or result of attributes of components of the system

Abiotic

Biotic

Spatial

Temporal

METRICS

-directly related to system properties that relate to services people want and need (e.g., abundance)

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