Second-Log Branch Size Comparison Between Even-aged and Multiaged Douglas-fir Stands in Coastal Northern California

Christopher Isaac Kirk, John-Pascal Berrill

Abstract


We studied how forest management decisions affect branching of coastal Douglas-fir Pseudotsuga menziesii var. menziesii in coastal northern California because knot sizes can affect performance, grade, and value of structural lumber. We focused on branching in the second log which is located immediately above the butt log and constitutes an important part of a tree's wood volume and potential value. Branch diameters were measured on multiple Douglas-fir trees nested within 40 plots sampling even-aged and multiaged stands. We analyzed two tree-level branch size metrics that can be influential in log grading: (i) the basal diameter of the largest branch on the log, and (ii) the average diameter of the largest branch on each quadrant (termed BIX). Generalized linear mixed-effects regression analysis revealed that branches were smaller in multiaged stands than even-aged stands. Trees with larger branches also had larger DBH and crown width, and lower height:diameter ratio. Branch diameters were more sensitive to competition from their nearest neighboring trees than overall stand density or basal area of larger trees. Since neighboring trees exerted control over branch development, and if large branches are undesirable, managers may consider implementing more dispersed patterns of retention and limiting creation of edges.


Keywords


BIX; multiaged management; Pseudotsuga menziesii; tree branching; uneven-aged silviculture; wood quality.

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References


Anderson, D. R. (2008). Model based inference in the life sciences: a primer on evidence New York: Springer, 184 p.

Ashton, M. S., & Kelty, M. J. (2018). The Practice of Silviculture: Applied Forest Ecology, 10th Edition. John Wiley and Sons, New York, NY. 776 p.

Bell, J., & Dilworth J. R. (2002). Log scaling and timber cruising. Cascade Printing Co. Corvallis, OR. 439 p.

Berrill, J-P., Jeffress, J. L., & Engle, J. M. (2012). Coast redwood live crown and sapwood dynamics. Pp. 463-474 in Tech. Rep. PSW-GTR-238, USDA Forest Service, Albany, CA. 644 p.

Berrill, J-P., & Boston, K. (2019). Conifer retention and hardwood management affect interplay between harvest volume and carbon storage over 100 years in Douglas-fir/tanoak: a case study. Mathematical and Computational Forestry & Natural-Resource Sciences 11(2): 286–293.

Briggs, D., Ingaramo, L., & Turnblom, E. (2007). Number and diameter of breast-height region branches in a Douglas-fir spacing trial and linkage to log quality. Forest Products Journal 57(9): 28-34.

Burdon, R. D., & Moore, J. R. (2018). Adverse genetic correlations and impacts of silviculture involving wood properties: analysis of issues for radiata pine. Forests 2018, 9: 308.

Cieszewski, C. J., Strub, M., Antony, F., Bettinger, P., Dahlen, J., & Lowe, R. C. (2013). Wood quality assessment of tree trunk from the tree branch sample and auxiliary data based on NIR Spectroscopy and SilviScan. Mathematical and Computational Forestry & Natural-Resource Sciences 5(1): 86–111.

Curtis, R. O., & Reukema, D.L. (1970). Crown development and site estimates in a Douglas-fir plantation spacing test. Forest Science 16: 287–301.

Faraway, J. J. (2005). Linear Models with R. CRC Press, 186 p.

Faraway, J. J. (2006). Extending the Linear Model with R: generalized linear, mixed effects and nonparametric regression models, 246 p.

Grah, R. F. (1961). Relationship between tree spacing, knot size, and log quality in young Douglas-fir stands. Journal of Forestry 59: 270–272.

Husch, B., Miller, C. I., & Beers, T. W. (1973). Forest Mensuration. Second edition. John Wiley & Sons, New York, NY. 410 p.

Inglis, C. S., & Cleland, M. R. (1982). Predicting final branch size in thinned radiata pine stands. New Zealand Forest Service, Forest Research Institute, FRI Bulletin No. 3.

Kantola, A., & Mäkelä, A. (2004). Crown development in Norway spruce [Picea abies (L.) Karst.]. Trees 18(4): 408-421.

Kirk, C., & Berrill, J-P. (2016). Second-log branching in multiaged redwood and Douglas-fir: influence of stand, site, and silviculture. Forests 2016, 7: 147.

Long, J. N. & Daniel, T. W. (1990). Assessment of growing stock in uneven-aged stands. Western Journal of Applied Forestry 5: 93–96.

Lowell, E. C., Maguire, D. A., Briggs, D. G., Turnblom, E. C., Jayawickrama, K. J. S., & Bryce, J. (2014). Effects of silviculture and genetics on branch/knot attributes of coastal Pacific Northwest Douglas-fir and implications for wood quality—a synthesis. Forests 2014, 5: 1717–1736.

Lowell, E. C., Turnblom, E. C.; Comnick, J.M.; Huang, C. (2018). Effect of rotation age and thinning regime on visual and structural lumber grades of Douglas-fir logs. Forests 2018, 9: 576.

Maguire, D. A., Kershaw, J. A., & Hann, D. W. (1991). Predicting the effects of silvicultural regime on branch size and crown wood core in Douglas-fir. Forest Science 37(5): 1409-1428.

Maguire, D. A., Johnston, S. R., & Cahill, J. (1999). Predicting branch diameters on second-growth Douglas-fir from tree-level descriptors. Canadian Journal of Forest Research 29(12): 1829-1840.

Mäkinen, H., & Hein, S. (2006). Effect of wide spacing on increment and branch properties of young Norway spruce. European Journal of Forest Research 125(3): 239-248.

Mesavage, C., & Girard, J. W. (1946). Tables for estimating board foot volume of timber. Washington, D.C.: US Forest Service.

Middleton, G. R., & Munro, B. D. (1989). Log and lumber yields in second growth Douglas-fir: its management and conversion for value. Kellogg, R.M., Ed.; Forintek Canada Corp.: Vancouver, BC, Canada, 1989; Chapter 7; pp. 66–74.

Milios E., Kitikidou, K., Pipinis, E. Stampoulidis, A., & Gotsi, M. (2018). Estimating tree bole height with Bayesian analysis. Mathematical and Computational Forestry & Natural-Resource Sciences 10(2): 58-67.

Mohler, C. L., Marks, P. L., & Sprugel, D. G. (1978). Stand structure and allometry of trees during self-thinning of pure stands. The Journal of Ecology, 599-614.

Newton, M., Lachenbruch, B., Robbins, J. M., & Cole, E. C. (2012). Branch diameter and longevity linked to plantation spacing and rectangularity in young Douglas-fir. Forest Ecology and Management 266: 75-82.

Nyland, R. D. (2003). Even-to uneven-aged: the challenges of conversion. Forest Ecology and Management 172(2): 291-300.

O'Connell, B. M., & Kelty, M. J. (1994). Crown architecture of understory and open-grown white pine (Pinus strobus L.) saplings. Tree Physiology 14(1): 89-102.

O’Hara, K. L. (2014). Multiaged silviculture: Managing for complex forest stand structures. Oxford University Press, Oxford, UK. 213 p.

Oliver, C. D., & Larson, B. C. (1996). Forest stand dynamics. Update edition. John Wiley & Sons, Inc. 520 p.

Peng, C. (2000). Growth and yield models for uneven-aged stands: past, present and future. Forest Ecology and Management 132(2): 259-279.

Petruncio, M., Briggs, D., & Barbour, R. J. (1997). Predicting pruned branch stub occlusion in young, coastal Douglas-fir. Canadian Journal of Forest Research 27(7): 1074-1082.

Pretzsch, H., & Rais, A. (2016). Wood quality in complex forests versus even-aged monocultures: Review and perspectives. Wood Science and Technology 50(4): 845–880.

R Development Core Team (2015). R: A language and environment for statistical computing. Available online at: http://www.r-project.org; last accessed August 7, 2019.

Schelhaas, M. J. 2008. The wind stability of different silvicultural systems for Douglas-fir in the Netherlands: a model-based approach. Forestry 81(3): 399-414.

Schniewind, A. P., & Lyon, D. E. (1973). A fracture mechanics approach to the tensile strength perpendicular to grain of dimension lumber. Wood Science and Technology 7(1): 45-59.

Soil Survey Staff. (2017). Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. https://websoilsurvey.sc.egov.usda.gov/. Last accessed: 23 October 2017.

Sprugel, D. G. (2002). When branch autonomy fails: Milton's Law of resource availability and allocation. Tree Physiology 22(15-16): 1119-1124.

Temesgen, H., LeMay, V., & Mitchell, S. J. (2005). Tree crown ratio models for multi-species and multi-layered stands of southeastern British Columbia. Forestry Chronicle 81(1): 133-141.

Todoroki, C. L., West, G. G., & Knowles R. L. (2001). Sensitivity analysis of log and branch characteristics influencing sawn timber grade. New Zealand Journal of Forestry Science 31(1): 101-119.

Verbyla, D. L., & Fisher, R. F. (1989). Effect of aspect on ponderosa pine height and diameter growth. Forest Ecology and Management 27(2): 93-98.

Vikram, V., Cherry, M. L., Briggs, D., Cress, D. W., Evans, R., & Howe G. T. (2011). Stiffness of Douglas-fir lumber: effects of wood properties and genetics. Canadian Journal of Forest Research 41(6): 1160-1173.

Wagner, C. V. (1977). Conditions for the start and spread of crown fire. Canadian Journal of Forest Research 7(1): 23-34.

Watt, M. S., Turner, J. A., & Mason, E. G. (2000). Genetic influence on second-log branching in Pinus radiata. New Zealand Journal of Forestry Science 30(3): 315-331.

Weiskittel, A. R., Maguire, D. A., & Monserud, R. A. (2007). Response of branch growth and mortality to silvicultural treatments in coastal Douglas-fir plantations: implication for predicting tree growth. Forest Ecology and Management 251: 182–194.

Whiteside, I. D., Wilcox, M. D., & Tustin, J. R. (1977). New Zealand Douglas fir timber quality in relation to silviculture. New Zealand Journal of Forestry 22: 24–44.

Williams, R. S., Jourdain, C., Daisey, G. I., & Springate, R. W. (2000). Wood properties affecting finish service life. Journal of Coatings Technology 72(902): 35-42.

Wonn, H. T., & O’Hara, K. L. (2001). Height: diameter ratios and stability relationships for four northern Rocky Mountain tree species. Western Journal of Applied Forestry 16(2): 87-94.

WWPA. (2017). Western Lumber Grading Rules; Western Wood Products Association: Portland, OR, USA. www.wwpa.org/resources. Last accessed: 7 April 2020.

Xu, P. (2002). Estimating the influence of knots on the local longitudinal stiffness in radiata pine structural timber. Wood Science and Technology 36(6): 501-509.

Yeatts, D. F. (2012). Tree shape and branch structure: mathematical models. Mathematical and Computational Forestry & Natural-Resource Sciences 4(1): 2–15.


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