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Title: Age structure and growth of California black oak (Quercus kelloggii) in the central Sierra Nevada, California

Author: Garrison, Barrett A.; otahal, Christopher D.; Triggs, Matthew L.;

Date: 2002

Source: In: Standiford, Richard B., et al, tech. editor. Proceedings of the Fifth Symposium on Oak Woodlands: Oaks in California's Challenging Landscape. Gen. Tech. Rep. PSW-GTR-184, Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 665-679

Publication Series: General Technical Report (GTR)

   Note: This article is part of a larger document. View the larger document

Description: Age structure and growth of California black oak (Quercus kelloggii) was determined from tagged trees at four 26.1-acre study stands in Placer County, California. Stands were dominated by large diameter (>20 inch dbh) California black oak and ponderosa pine (Pinus ponderosa). Randomly selected trees were tagged in June-August 1998 and harvested under a group selection timber harvest in October-November 1998 and May-June 1999. Trees averaged 148 years of age (range = 58 to 356 years, n = 108), and ages differed among the four stands (P < 0.006). Stands had uneven distributions of tree ages, diameters, and heights. A nonlinear regression model was developed that predicted tree age based on diameter (R2 = 0.74). The average 10-year increment of radial growth was 0.72 inches (range = 0.14-2.26 inches, n = 122), and radial growth decreased as basal area increased (nonlinear regression, R2 = 0.34). If average growth rates are desired, basal area retention should average around 100-115 ft2/acre and 200-225 ft2/acre for California black oak and all trees, respectively, for stands in the central Sierra Nevada with attributes that are similar to our study stands.

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Garrison, Barrett A.; otahal, Christopher D.; Triggs, Matthew L. 2002. Age structure and growth of California black oak (Quercus kelloggii) in the central Sierra Nevada, California. In: Standiford, Richard B., et al, tech. editor. Proceedings of the Fifth Symposium on Oak Woodlands: Oaks in California''s Challenging Landscape. Gen. Tech. Rep. PSW-GTR-184, Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 665-679

 


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