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Abstract
Querying the Forest Inventory and Analysis Database (FIADB) for growth, removals, and mortality (GRM) estimates can certainly be a conundrum. Providing the flexibility necessary to produce a wide array of GRM estimates has the unfortunate side effect of added complexity. This presentation seeks to answer some recurring questions related to GRM and how our new system can be leveraged to meet our needs. Questions addressed include: • What is the difference between the accounting and other methods of summarizing GRM estimates? • Why do GRM estimates for an eastern evaluation include plots that are 10 years old? • What happens when a tree: • Is determined to be extraneous or missed at time 1? • Species code differs between time1 and time 2? • Is recorded as standing dead at time 1 but live at time 2? • How can the same tree be a diversion in one estimate and a survivor tree different estimate? • What is the difference between Beers/Miller and Van Deusen methodology?
Parent Publication
Citation
Turner, Jeffery A. 2015. Everything you ever wanted to know about GRM* (*but were afraid to ask). In: Stanton, Sharon M.; Christensen, Glenn A., comps. 2015. Pushing boundaries: new directions in inventory techniques and applications: Forest Inventory and Analysis (FIA) symposium 2015. 2015 December 8–10; Portland, Oregon. Gen. Tech. Rep. PNW-GTR-931. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. p. 171.
