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FIA Biomass Need

This paper presents a new compatible system for biomass and volume estimation in the FIA Database (FIADB) to meet the needs of all users. By leveraging historical data on tree boles and component ratios from Jenkins et al., it utilizes 80 years of FIA bole volume expertise combined with Jenkins' tree component experiences. The new method, known as the Component Ratio Method (CRM), enables detailed analysis of tree components, improving the reliability of trends. While there are some caveats regarding cull exclusions and biomass characteristics, this system significantly enhances data consistency and user capabilities.

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FIA Biomass Need

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  1. FIA Biomass Need A compatible system for biomass and volume estimation in FIADB to serve all users

  2. Perspective Over 70% of aboveground tree volume is in the bole, and… SpeciesAll Volume Top 12 50% Top 35 75% Top 100 96% Other 765 4%

  3. Knowledge FIA knows tree boles Jenkins et al. has tree component ratios

  4. Best of both worlds Use FIA for bole volume Use Jenkins et al. for tree component ratios relative to the bole

  5. Bottom line 80 years of FIA bole volume experience capitalized Jenkins et al. tree component experience capitalized Every tree in FIADB has compatible volume components You can do analysis on the tree component of choice You can cookie cut the FIADB with abandon reliably You can recast older FIA data for consistent trends

  6. Caveats New system provides sound volume only as biomass characteristics of rotten cull are unknown New system under runs Jenkins et al. slightly (approx 3%) due mostly to cull exclusion New system will better capture trends if cull levels are not constant under climate change scenarios- which they likely will not be

  7. To Date Prepared paper to update Jenkins specific gravities for national FIA list and added green and dry weight factors Prepared a paper to analyze and describe the new system called the Component Ratio Method (CRM) relative to Jenkins et al. approach Loaded the FIADB with new compatible component data using the CRM approach

  8. More information? Mark Hansen will be making a presentation later today and at the Biometrics Group meeting

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