Journal
FOREST ECOLOGY AND MANAGEMENT
Volume 257, Issue 10, Pages 2189-2197Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foreco.2009.03.001
Keywords
Stand production; Old-growth; Picea mariana; Yield modelling; Stand-replacing disturbances
Categories
Funding
- NSERC
- Canada Economic Development
- Fondation de la faune du Quebec
- Fonds quebecois de la recherche sur la nature et les technologies
- Abitibi-Bowater Inc.
- Kruger Inc.
- FPInnovations
- Produits forestiers Arbec
- Gestion Remabec Inc
- Ministere du Developpement durable du Quebec
- Ministere des Ressources naturelles et de la Faune du Quebec
- Fonds quebecois de la recherche sur la nature et les technologies (FQRNT)
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Yield curves are traditionally constructed with mean age of dominant trees as the temporal variable. However. when tree longevity is shorter than the average period of time between two successive disturbances. mean age of dominant trees becomes a doubtful temporal variable in old-growth stands. We thus used the period of time since the last fire (TSF) to model yield of black spruce (Picea mariana [Mill.] B.S.P.) stands in northeastern Quebec, Canada. For the first 200 years after fire, a system of difference equations closely fits the pattern of change in merchantable volume obtained from repeated measurements of 67 permanent sample plots (PSPs). For TSF > 200 years, the absence of precise TSF constrained us to determining only the general yield trajectory, i.e., whether the volume decreases down to a zero value or is maintained at a constant positive value. A procedure based on the observed distribution of 260 PSPs over volume classes suggested that merchantable volume of black spruce stands is generally maintained around a constant value fora long period of time. Using TSF rather than mean age of dominant trees in yield modelling produced large differences indicating that TSF should be used where available. especially in regions dominated by old-growth forests. (C) 2009 Elsevier B.V. All rights reserved.
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