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Site Occupancy, options: A plot by plot approach: The intent of this approach is to assess site occupancy in areas that have been partially harvested with a remaining heterogeneous stand structure, such as in areas where lodgepole pine has been harvested from the stand for Mountain Pine Beetle (MPB) salvage . Plots would be located within similar strata using a grid approach at one plot per ha. The intent is to identify options to increase site occupancy, and hence volume growth within the stand. The present survey system has provided a range of results in stands with varied structure. Often the results were seen as lacking an accurate description of the stand structure and opportunities for additional stocking and future volume production. The present system uses plot averaging which dilutes the potential for interpretation and recommendations. Tool not Solution The approach is a tool, not a solution. The numbers used in the example are examples only, it is expected that local numbers would be created using local situations and the understanding of site occupancy over the range of stand types and site productivity. A comparison of a range of structurally diverse blocks is needed to test the SOA system more thoroughly. The advantage of the Site Occupancy Approach is its simplicity and ability to accommodate the different site requirements of overstory versus understory stems. Scope and Limitations of the Report The suggested system is based on preliminary model runs of understory opportunities. As well it has only been field tested at one site. It is meant to be calibrated for each area and limits for High, Medium and Low opportunity must be agreed on by knowledgeable practitioners. It therefore requires further field testing and assessment. We recommend the new approach be used to compare results with the traditional survey methods on at least 5 blocks where the conventional survey results have not provided useful information. Data on growth opportunities should be updated when new information becomes available. By: Bryce Bancroft and Ken Zielke, and Pat Martin.
Bancroft, Bryce G., Zielke, Ken; Martin, Pat; Symmetree Consulting Group Ltd.; British Columbia Ministry of Forests. 2003. Partially cut: occupied or not? - What are my options? - A proposed survey approach. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2003MR138
Topic: FLNRORD Research Program
Keywords: Forest, Investment, Account, (FIA), Silvicultural, Systems, British, Columbia
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