UBC Faculty Research and Publications

Site index curve and table for trembling aspen in the boreal white and black spruce zone of British Columbia Klinka, Karel 2008

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Site Index Curve and Table for Trembling Aspen in the Boreal White and Black Spruce Zone of British Columbia Site index curves and tables for estimating site index of trembling aspen in BC have been adopted from the Alberta site index model.  However, we found that the Alberta model produces  biased estimates of site index of aspen stands in this province.  To provide more accurate estimates of site index for BC aspen stands, we sampled naturally established, undamaged, closed- canopy stands over a wide range of sites in the Boreal White and Black Spruce (BWBS) zone.  A total of 33 stands were used in the analysis with breast-height ages of dominant trees over 50 years.  In each stand, three dominant trees were selected and felled for stem analysis.  From these data, we constructed a height growth model: [ ]    = + − − −             where: ( )   = −     − − − ×                 where: H = top height (m); S = site index (height at 50 year breast-height age); A = breast-height age (year); e = the base of exponential function; and ln = natural logarithm. The height growth curves and site index table derived from the above model presented here are recommended for use across the eastern portion of the BWBS zone for estimating site index of aspen stands aged 15 - 70 years at breast-height. Reference Chen H.Y., K. Klinka and R. Kabzems. 1998. Height growth and site index models for trembling aspen (Populus tremuloides Michx.) in northern British Columbia. For. Ecol. Manage. 102:157-165   
                                   Height  growth curve for aspen stands in the Boreal White and Black Spruce zone. Breast-height age (years) To p he ig ht   (m ) Scientia  Silvica Extension Series, Number  2, 1997 Scientia Silvica  is published by the Forest Sciences Department, The University of British Columbia, ISSN 1209-952X Editor: Karel Klinka (klinka@interchange.ubc.ca) Research: Han Y. H. Chen (han.chen@mnr.gov.on.ca) Production and design: Christine Chourmouzis (chourmou@interchange.ubc.ca) Financial support: Forest Renewal British Columbia (1995-1997) For more information contact: Han Chen (han.chen@mnr.gov.on.ca) Copies available from: www.forestry.ubc.ca/klinka, or K.Klinka, Forest Sciences Department, UBC, 3036-2424 Main Mall, Vancouver, BC, V6T 1Z4 Age @ bh Site index: top height (m) @ breast height age 50  (yrs) 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25  Top height (m)  10 2.6 2.9 3.2 3.4 3.7 3.9 4.2 4.4 4.7 4.9 5.1 5.4 5.6 5.8 6.0 6.2 6.5 6.7 6.9 7.1 7.3 11 2.7 3.0 3.3 3.6 3.9 4.2 4.4 4.7 5.0 5.2 5.5 5.7 6.0 6.2 6.5 6.7 6.9 7.2 7.4 7.6 7.9 12 2.8 3.1 3.4 3.8 4.1 4.4 4.7 5.0 5.2 5.5 5.8 6.1 6.4 6.6 6.9 7.2 7.4 7.7 7.9 8.2 8.5 13 2.9 3.2 3.6 3.9 4.3 4.6 4.9 5.2 5.5 5.8 6.1 6.4 6.7 7.0 7.3 7.6 7.9 8.2 8.5 8.7 9.0 14 3.0 3.3 3.7 4.1 4.4 4.8 5.1 5.5 5.8 6.1 6.5 6.8 7.1 7.4 7.7 8.0 8.4 8.7 9.0 9.3 9.6 15 3.0 3.5 3.8 4.2 4.6 5.0 5.3 5.7 6.1 6.4 6.8 7.1 7.5 7.8 8.1 8.5 8.8 9.1 9.5 9.8 10.1 16 3.1 3.6 4.0 4.4 4.8 5.2 5.6 6.0 6.3 6.7 7.1 7.5 7.8 8.2 8.5 8.9 9.3 9.6 10.0 10.3 10.7 17 3.2 3.7 4.1 4.5 5.0 5.4 5.8 6.2 6.6 7.0 7.4 7.8 8.2 8.6 8.9 9.3 9.7 10.1 10.5 10.8 11.2 18 3.3 3.8 4.2 4.7 5.1 5.6 6.0 6.4 6.8 7.3 7.7 8.1 8.5 8.9 9.3 9.7 10.1 10.5 10.9 11.3 11.7 19 3.4 3.9 4.3 4.8 5.3 5.7 6.2 6.7 7.1 7.5 8.0 8.4 8.9 9.3 9.7 10.1 10.6 11.0 11.4 11.8 12.3 20 3.4 3.9 4.5 4.9 5.4 5.9 6.4 6.9 7.3 7.8 8.3 8.7 9.2 9.6 10.1 10.5 11.0 11.4 11.9 12.3 12.8 21 3.5 4.0 4.6 5.1 5.6 6.1 6.6 7.1 7.6 8.1 8.6 9.0 9.5 10.0 10.5 10.9 11.4 11.9 12.3 12.8 13.3 22 3.6 4.1 4.7 5.2 5.7 6.3 6.8 7.3 7.8 8.3 8.8 9.3 9.8 10.3 10.8 11.3 11.8 12.3 12.8 13.3 13.8 23 3.6 4.2 4.8 5.3 5.9 6.4 7.0 7.5 8.1 8.6 9.1 9.6 10.2 10.7 11.2 11.7 12.2 12.7 13.2 13.8 14.3 24 3.7 4.3 4.9 5.5 6.0 6.6 7.2 7.7 8.3 8.8 9.4 9.9 10.5 11.0 11.6 12.1 12.6 13.2 13.7 14.2 14.7 25 3.8 4.4 5.0 5.6 6.2 6.8 7.4 7.9 8.5 9.1 9.7 10.2 10.8 11.3 11.9 12.5 13.0 13.6 14.1 14.7 15.2 26 3.8 4.5 5.1 5.7 6.3 6.9 7.5 8.1 8.7 9.3 9.9 10.5 11.1 11.7 12.3 12.8 13.4 14.0 14.5 15.1 15.7 27 3.9 4.5 5.2 5.8 6.5 7.1 7.7 8.3 9.0 9.6 10.2 10.8 11.4 12.0 12.6 13.2 13.8 14.4 15.0 15.6 16.2 28 4.0 4.6 5.3 5.9 6.6 7.2 7.9 8.5 9.2 9.8 10.4 11.1 11.7 12.3 12.9 13.5 14.2 14.8 15.4 16.0 16.6 29 4.0 4.7 5.4 6.1 6.7 7.4 8.1 8.7 9.4 10.0 10.7 11.3 12.0 12.6 13.2 13.9 14.5 15.2 15.8 16.4 17.1 30 4.1 4.8 5.5 6.2 6.9 7.5 8.2 8.9 9.6 10.2 10.9 11.6 12.2 12.9 13.6 14.2 14.9 15.5 16.2 16.8 17.5 31 4.1 4.9 5.6 6.3 7.0 7.7 8.4 9.1 9.8 10.5 11.2 11.8 12.5 13.2 13.9 14.6 15.2 15.9 16.6 17.3 17.9 32 4.2 4.9 5.7 6.4 7.1 7.8 8.6 9.3 10.0 10.7 11.4 12.1 12.8 13.5 14.2 14.9 15.6 16.3 17.0 17.7 18.4 33 4.2 5.0 5.7 6.5 7.2 8.0 8.7 9.4 10.2 10.9 11.6 12.3 13.1 13.8 14.5 15.2 15.9 16.6 17.4 18.1 18.8 34 4.3 5.1 5.8 6.6 7.4 8.1 8.9 9.6 10.4 11.1 11.9 12.6 13.3 14.1 14.8 15.5 16.3 17.0 17.7 18.5 19.2 35 4.3 5.1 5.9 6.7 7.5 8.2 9.0 9.8 10.5 11.3 12.1 12.8 13.6 14.3 15.1 15.9 16.6 17.4 18.1 18.9 19.6 36 4.4 5.2 6.0 6.8 7.6 8.4 9.2 10.0 10.7 11.5 12.3 13.1 13.8 14.6 15.4 16.2 16.9 17.7 18.5 19.2 20.0 37 4.4 5.3 6.1 6.9 7.7 8.5 9.3 10.1 10.9 11.7 12.5 13.3 14.1 14.9 15.7 16.5 17.3 18.0 18.8 19.6 20.4 38 4.5 5.3 6.2 7.0 7.8 8.6 9.5 10.3 11.1 11.9 12.7 13.5 14.3 15.2 16.0 16.8 17.6 18.4 19.2 20.0 20.8 39 4.5 5.4 6.2 7.1 7.9 8.8 9.6 10.4 11.3 12.1 12.9 13.8 14.6 15.4 16.2 17.1 17.9 18.7 19.5 20.4 21.2 40 4.6 5.4 6.3 7.2 8.0 8.9 9.7 10.6 11.4 12.3 13.1 14.0 14.8 15.7 16.5 17.4 18.2 19.0 19.9 20.7 21.5 41 4.6 5.5 6.4 7.3 8.1 9.0 9.9 10.7 11.6 12.5 13.3 14.2 15.1 15.9 16.8 17.6 18.5 19.4 20.2 21.1 21.9 42 4.7 5.6 6.5 7.4 8.2 9.1 10.0 10.9 11.8 12.7 13.5 14.4 15.3 16.2 17.0 17.9 18.8 19.7 20.5 21.4 22.3 43 4.7 5.6 6.5 7.4 8.3 9.2 10.1 11.0 11.9 12.8 13.7 14.6 15.5 16.4 17.3 18.2 19.1 20.0 20.9 21.8 22.6 44 4.8 5.7 6.6 7.5 8.4 9.4 10.3 11.2 12.1 13.0 13.9 14.8 15.7 16.6 17.6 18.5 19.4 20.3 21.2 22.1 23.0 45 4.8 5.7 6.7 7.6 8.5 9.5 10.4 11.3 12.3 13.2 14.1 15.0 16.0 16.9 17.8 18.7 19.7 20.6 21.5 22.4 23.3 46 4.8 5.8 6.7 7.7 8.6 9.6 10.5 11.5 12.4 13.4 14.3 15.2 16.2 17.1 18.1 19.0 19.9 20.9 21.8 22.7 23.7 47 4.9 5.8 6.8 7.8 8.7 9.7 10.6 11.6 12.6 13.5 14.5 15.4 16.4 17.3 18.3 19.3 20.2 21.2 22.1 23.1 24.0 48 4.9 5.9 6.9 7.8 8.8 9.8 10.8 11.7 12.7 13.7 14.7 15.6 16.6 17.6 18.5 19.5 20.5 21.4 22.4 23.4 24.4 49 5.0 5.9 6.9 7.9 8.9 9.9 10.9 11.9 12.9 13.8 14.8 15.8 16.8 17.8 18.8 19.8 20.7 21.7 22.7 23.7 24.7 50 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 51 5.0 6.0 7.1 8.1 9.1 10.1 11.1 12.1 13.1 14.2 15.2 16.2 17.2 18.2 19.2 20.2 21.3 22.3 23.3 24.3 25.3 52 5.1 6.1 7.1 8.1 9.2 10.2 11.2 12.3 13.3 14.3 15.3 16.4 17.4 18.4 19.4 20.5 21.5 22.5 23.6 24.6 25.6 53 5.1 6.1 7.2 8.2 9.3 10.3 11.3 12.4 13.4 14.5 15.5 16.5 17.6 18.6 19.7 20.7 21.8 22.8 23.8 24.9 25.9 54 5.1 6.2 7.2 8.3 9.3 10.4 11.4 12.5 13.6 14.6 15.7 16.7 17.8 18.8 19.9 20.9 22.0 23.1 24.1 25.2 26.2 55 5.2 6.2 7.3 8.4 9.4 10.5 11.6 12.6 13.7 14.8 15.8 16.9 18.0 19.0 20.1 21.2 22.2 23.3 24.4 25.5 26.5 56 5.2 6.3 7.4 8.4 9.5 10.6 11.7 12.7 13.8 14.9 16.0 17.1 18.1 19.2 20.3 21.4 22.5 23.6 24.6 25.7 26.8 57 5.2 6.3 7.4 8.5 9.6 10.7 11.8 12.8 13.9 15.0 16.1 17.2 18.3 19.4 20.5 21.6 22.7 23.8 24.9 26.0 27.1 58 5.3 6.4 7.5 8.6 9.7 10.8 11.9 13.0 14.1 15.2 16.3 17.4 18.5 19.6 20.7 21.8 22.9 24.0 25.2 26.3 27.4 59 5.3 6.4 7.5 8.6 9.7 10.8 12.0 13.1 14.2 15.3 16.4 17.5 18.7 19.8 20.9 22.0 23.2 24.3 25.4 26.5 27.7 60 5.3 6.5 7.6 8.7 9.8 10.9 12.1 13.2 14.3 15.4 16.6 17.7 18.8 20.0 21.1 22.2 23.4 24.5 25.7 26.8 27.9 61 5.4 6.5 7.6 8.8 9.9 11.0 12.2 13.3 14.4 15.6 16.7 17.9 19.0 20.1 21.3 22.4 23.6 24.7 25.9 27.0 28.2 62 5.4 6.5 7.7 8.8 10.0 11.1 12.2 13.4 14.5 15.7 16.9 18.0 19.2 20.3 21.5 22.6 23.8 25.0 26.1 27.3 28.5 63 5.4 6.6 7.7 8.9 10.0 11.2 12.3 13.5 14.7 15.8 17.0 18.2 19.3 20.5 21.7 22.8 24.0 25.2 26.4 27.5 28.7 64 5.5 6.6 7.8 8.9 10.1 11.3 12.4 13.6 14.8 15.9 17.1 18.3 19.5 20.7 21.9 23.0 24.2 25.4 26.6 27.8 29.0 65 5.5 6.7 7.8 9.0 10.2 11.3 12.5 13.7 14.9 16.1 17.3 18.5 19.6 20.8 22.0 23.2 24.4 25.6 26.8 28.0 29.2 66 5.5 6.7 7.9 9.0 10.2 11.4 12.6 13.8 15.0 16.2 17.4 18.6 19.8 21.0 22.2 23.4 24.6 25.8 27.0 28.3 29.5 67 5.5 6.7 7.9 9.1 10.3 11.5 12.7 13.9 15.1 16.3 17.5 18.7 19.9 21.2 22.4 23.6 24.8 26.0 27.3 28.5 29.7 68 5.6 6.8 8.0 9.2 10.4 11.6 12.8 14.0 15.2 16.4 17.6 18.9 20.1 21.3 22.6 23.8 25.0 26.2 27.5 28.7 30.0 69 5.6 6.8 8.0 9.2 10.4 11.6 12.9 14.1 15.3 16.5 17.8 19.0 20.2 21.5 22.7 24.0 25.2 26.4 27.7 28.9 30.2 70 5.6 6.8 8.0 9.3 10.5 11.7 12.9 14.2 15.4 16.7 17.9 19.1 20.4 21.6 22.9 24.1 25.4 26.6 27.9 29.2 30.4  Site index table for naturally established aspen stands in the Boreal White and Black Spruce zone.

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