today’s topioc: forest health issues forest health defoliator outbreaks how to determine

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Today’s topioc:Forest Health Issues

• Forest Health• Defoliator Outbreaks

– How to determine– Scientific “control”– Timing, extent, patterns– Relationship with fire

• The real tree killers• Combined climate-human influence

on SW forestshttp://cpluhna.nau.edu/index.htm

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Forest Health• Do forests get “sick”? How?• Form

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Why Care About Healthy Forests?

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Spruce Budworm• -• -

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Current Outbreak

• Lots of dead trees

• Still have branches

• No fire char

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• Clumps of trees often succumb together

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• Inside the woods can be quite airy

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• One management strategy is ____________– -

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Geography• -

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Deep Time Past

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Scientific “Control”• “Treated”: -• “Control”: -

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1 site

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BarkBeetles

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Any fire effects?

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DwarfMistletoe

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Huge recruitment of ________________ in NM

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Late 1800s

1992

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A Grand Picture

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SW Forest Health Key Points• ------------------?

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Healthy Forest Act (2003)

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