EBM Element:

Incorporating Variation

The degree to which targets incorporate spatial and temporal variation is an important part of NRV. Options range from using averages to thresholds to probabilities. Including more sources of variation moves us closer to capturing actual variation and closer to EBM. At the heart of this element is the idea that nature is neither random nor deterministic, but rather probabilistic.

Incorporating Variation Case Study

The 'Incorporating Variation' Journey

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Challenges &
Opportunities to EBM

Incorporating Variation

As regulatory complexity has increased, opportunities for innovation have narrowed. This unintended consequence has eroded flexibility in planning for, and managing, variable targets as a part of EBM. Such variability is a feature of EBM where the natural range of variation (NRV) is a foundation.

However, opportunities to incorporate variation have recently been presented. VOITs typically display variation over the long-term planning horizon, and Forest Management Plans now routinely show the target variation as upper and lower NRV limits. Voluntary standards for NRV analysis and target setting propose that targets should be set within NRV.

Box plots showing Natural Range of Variation

Image credit: David Andison

The 4 Classes of EBM
EBM Wheel

The EBM Journey

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The journey is the process of supporting and sharing knowledge that will allow us to shift current forestry management towards EBM

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Who are we working with as we manage?
Why are we managing the resource?