Forest Investment Account (FIA) - Land Base Investment Program
FIA Project 4461001

    PROBE Nicomen River and Crown Bench
Project lead: Ainsworth Lumber Co. Ltd.
Subject: Forest Investment Account (FIA), British Columbia
Series: Forest Investment Account (FIA) - Land Base Investment Program
PROBE has gathered information about the effects of operational brushing treatments on conifer seedlings and vegetation in the southern interior of B.C. since 1991. The project includes 97 sites and encompasses 13 vegetation complexes that occur across a range of ecosystems. We have published 1-10 year results for eight of these complexes, and are in the process of preparing further publications as data is collected. The information provided by PROBE is extremely valuable for determining which sites are likely to respond to brushing treatments. Our results are showing which vegetation complexes require brushing to enhance conifer growth and performance, and importantly, which do not. It is also showing which types of treatments are effective in different vegetation complexes, and which may be producing unexpected side effects such as increased incidence of Armillaria root disease. PREOBE results are especially important for broadleaf complexes because vegetation interacts with conifers for a long period of time and because of the controversy that exists with regard to appropriate broadleaf densities that can be retained at free-growing. PROBE results can be cited with confidence because of its sound experimental and statistical design.

Establishment of long-term measurement plots on PROBE sites
Existing PROBE sites can provide valuable long-term information about the effects of vegetation management treatments on conifer growth and yield, stand dynamics, and plant community development and diversity. Based on a previously developed long-term measurement protocol (EXPLORE 1998), we have been collecting additional stand, site, and plant species data in large permanent sample plots, within the existing treatment and control plots at individual PROBE sites. To date we have established long-term plots on 16 sites and as funding permits and sites develop we are adding to this number. Measurements at these sites will be repeated about once a decade.

Measurement of sites
We are asking for funding for measurement of 2 sites on which the Dry Alder complex is being studied:
13-year re-measurement of spruce and vegetation following manual cutting of the Dry Alder complex (Nicoamen River, site 18)
Conversion of one site measure long-term response of lodgepole pine to glyphosate treatment of the Dry Alder complex (Crown Bench, site 31)

Analysis and report preparation
PROBE has generated a large amount of data that must be analyzed every year to include new measurements. This year we will prepare an extension note reporting ten-year results for the Dry Alder complex which will incorporate data from the sites measured this year. We are currently preparing operationally focussed extension notes for the eight vegetation complexes for which we have fully replicated results. These reports will be published online at a newly developed PROBE website by March 2005 and the Dry Alder report will be published on this site by March 2006. We are requesting funds to contribute to analysis, writing, and updating our website.

Data (0.1Mb)

Updated August 16, 2010 

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