A New Way to Look at Aspen Competition in the Cariboo when Assessing Free Growing
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A New Way to Look at Aspen A New Way to Look at Aspen Competition in the Competition in the Cariboo Cariboo when Assessing Free Growing when Assessing Free Growing 1
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A New Way to Look at Aspen Competition in the Cariboo when Assessing Free Growing. A New Way to Look at Aspen Competition in the Cariboo when assessing Free Growing. The Three Presenter's Teresa: Research results and how they were applied operationally - PowerPoint PPT Presentation
Transcript of A New Way to Look at Aspen Competition in the Cariboo when Assessing Free Growing
A New Way to Look at Aspen A New Way to Look at Aspen Competition in the Competition in the Cariboo Cariboo when when
Assessing Free GrowingAssessing Free Growing1
A New Way to Look at Aspen Competition in A New Way to Look at Aspen Competition in the the CaribooCariboo when assessing Free Growing when assessing Free Growing
The Three Presenter's1. Teresa: Research results and how they were
applied operationally2. Dave: Administrative Update – Free Growing
Standards and Appendix 93. Jean: Recommended changes to guidance for
pine and aspen and plot protocol
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The “Research” The “Research”
• The research question• Research completed• Summary of research results• Research to operations • Considerations regarding post-brushing activities
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• There was always a feeling that a certain density of broadleaf trees could be retained without compromising conifer growth and that our current free growing guidelines for aspen tolerance were too restrictive.
• Narrowing the question usually results in more solid results. Pine and aspen are the most common combination in the Cariboo so the research question was initially narrowed to those two species and on 2 subzones (IDFdk3 and n SBSdw1&2).
Our research question: Our research question: How much aspen is too much?How much aspen is too much?
21 year old SBSdw1 stand
What research was done? What research was done?
Over time the trial was expanded to include a few other subzones and a number of different designs.
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Ecological Classification
Range of Stand Ages Studied
Type of study
SBPSxc 11-18 Variable density
IDFdk3 12 - 31 Retrospective
6-20 Variable density
SBSdw1&2 13-34 Retrospective
8-14 Variable density
1-20 Variable radius
SBPSmk 8-15 Variable density
Summary of Research ResultsSummary of Research Results
• The effects of aspen competition on pine development increased between subzones (SBSdw1&2>IDFdk3>SBPSxc)
• SBPSxc: Aspen competition did not affect pine development after establishment
• Where aspen was an important competitor (SBSdw1&2 and IDFdk3)– Density was a key factor that could be easily assessed– Aspen could be 125% taller than the pine and not
affect growth
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Under-story Pine 2001Under-story Pine 2001(11 yrs)(11 yrs)
Pine now growing thru aspen Pine now growing thru aspen (18 yrs)(18 yrs)
SBPSxcSBPSxc
