, Volume 19, Issue 1, pp 58–65 | Cite as

The influence of wind on branch characteristics of Pinus radiata

Original Article


Measurements taken from trees growing in exposed and sheltered areas within two structurally similar forests were used to investigate the influence of wind on branch characteristics of mature New Zealand-grown Pinus radiata. A widely used branch model was used to remove the influence of treatment and site differences in tree stem diameter and height, so that the influence of wind on branch diameter could be examined. At site 1 average windspeed in the exposed treatment exceeded average windspeed in the sheltered treatment by 62%. When averaged across sites, mean branch diameter, branch index (mean diameter of the largest branch, in each of the four azimuthal quadrants) and largest branch diameter in exposed areas significantly exceeded values for trees in sheltered areas by 9 mm (25%), 42 mm (54%), and 72 mm (72%), respectively. Treatment and site differences in tree stem diameter and height partially accounted for the observed increases in branch diameter. However, after these effects were removed by the model, branch diameter in exposed areas still significantly exceeded that in sheltered areas by 21 mm for branch index and 44 mm for the largest branch. Treatment and site variation in this residual branch diameter was almost entirely attributable to topographical exposure to 1 km, a variable which has been found to be strongly correlated to windspeed. Possible reasons for these observed wind-induced increases in branch diameter are discussed.


Branch diameter Wind Topograhical exposure Thigmomorphogenesis 


  1. Anonymous (1973) Summaries of climatological observations to 1970. New Zealand Meteorological Service Miscellaneous Publication 143, Wellington, New ZealandGoogle Scholar
  2. Bertram JEA (1989) Size-dependent differential scaling in branches: the mechanical design of trees revisited. Trees 4:241–253Google Scholar
  3. Cannell MGR, Morgan J (1989) Branch breakage under snow and ice loads. Tree Physiol 5:307–317PubMedGoogle Scholar
  4. Doruska PF, Burkhart HE (1994) Modeling the diameter and locational distribution of branches within the crowns of loblolly pine trees in unthinned plantations. Can J For Res 24:2362–2376Google Scholar
  5. Forest Research (1993) Standpak, stand management system for radiata pine users’ manual version 5. Forest Research, RotoruaGoogle Scholar
  6. Forest Research (1995) Guide to using MARVL 3. Forest Research, RotoruaGoogle Scholar
  7. Gere JM, Timoshenko SP (1984) Mechanics of materials, 2nd edn. PWS Engineering, BostonGoogle Scholar
  8. Green SR, Grace J, Hutchings NJ (1995) Observation of turbulent air flow in three stands of widely spaced Sitka spruce. Agric For Meteorol 74:205–225CrossRefGoogle Scholar
  9. Hannah P, Palutikof JP, Quine CP (1995) Predicting windspeeds for forest areas in complex terrain. In: Coutts MP, Grace J (eds) Wind and trees. Cambridge University Press, Cambridge, pp 113–129Google Scholar
  10. Hashimoto R (1990) Analysis of the morphology and structure of crowns in a young sugi (Cryptomeria japonica) stand. Tree Physiol 6:119–134PubMedGoogle Scholar
  11. Hashimoto R (1991) Canopy development in young sugi (Cryptomeria japonica) stands in relation to changes with age in crown morphology and structure. Tree Physiol 8:129–143PubMedGoogle Scholar
  12. Hunter IR, Gibson AR (1984) Predicting Pinus radiata site index from environmental variables. N Z J For Sci 14:53–64Google Scholar
  13. Hutchinson MF, Gessler PE (1994) Splines-more than just a smooth interpolator. Geoderma 62:45–67CrossRefGoogle Scholar
  14. Inglis CS, Cleland MR (1982) Predicting final branch size in thinned radiata pine stands. New Zealand Forest Research Institute Bulletin No. 3. Forest Research, RotoruaGoogle Scholar
  15. Jacobs MR (1954) The effect of wind sway on the form and development of Pinus radiata D. Don. Aust J Bot 2:35–51Google Scholar
  16. Leathwick JR, Stephens RTT (1998) Climate surfaces for New Zealand. Landcare Research Contract Report LC9798/126. Landcare Research, LincolnGoogle Scholar
  17. Leiser AT, Harris RW, Neel PL, Long D, Slice NW, Maire RG (1972) Staking and pruning influence trunk development of young trees. J Am Soc Hortic Sci 97:498–503Google Scholar
  18. Maguire DA, Kershaw JA Jr, Hann DW (1991) Predicting the effects of silvicultural regime on branch size and crown wood core in Douglas-fir. For Sci 37:1408–1428Google Scholar
  19. Maguire DA, Moeur M, Bennett WS (1994) Models for describing basal diameter and vertical distribution of primary branches in young Douglas-fir. For Ecol Manage 63:23–55CrossRefGoogle Scholar
  20. Maguire DA, Johnston SR, Cahill J (1999) Predicting branch diameters on second-growth Douglas-fir from tree-level descriptors. Can J For Res 29:1829–1840CrossRefGoogle Scholar
  21. Mäkinen H, Colin F (1998) Predicting branch angle and branch diameter of Scots pine from usual tree measurements and stand structural information. Can J For Res 28:1686–1696CrossRefGoogle Scholar
  22. Nicholls JWP (1982) Wind action, leaning trees and compression wood in Pinus radiata D. Don. Aust For Res 12:75–91Google Scholar
  23. Niklas KJ (1992) Plant biomechanics: an engineering approach to plant form and function. University of Chicago Press, ChicagoGoogle Scholar
  24. Petty JA, Swain C (1985) Factors influencing stem breakage in conifers in high winds. Forestry 58:75–84Google Scholar
  25. Pruyn ML, Ewers BJ III, Telewski FW (2000) Thigmomorphogenesis: changes in the morphology and mechanical properties of two Populus hybrids in response to mechanical perturbation. Tree Physiol 20:535–540PubMedGoogle Scholar
  26. Ruel JC, Pin D, Cooper K (1998) Effect of topography on wind behaviour in a complex terrain. Forestry 71:261–265Google Scholar
  27. SAS (2000) SAS/STAT User’s Guide: version 8, vol 1–3. SAS Institute, CaryGoogle Scholar
  28. Siemen GR, Wood GB, Forrest WG (1976) Effects of thinning on crown structure in radiata pine. N Z J For Sci 6:57–66Google Scholar
  29. Spicer R, Gartner BL (1998) Hydraulic properties of Douglas-fir (Pseudotsuga menziesii) branches and branch halves with reference to compression wood. Tree Physiol 18:777–784PubMedGoogle Scholar
  30. Telewski FW (1989) Structure and function of flexure wood in Abies fraseri. Tree Physiol 5:113–121PubMedGoogle Scholar
  31. Telewski FW (1995) Wind induced physiological and developmental responses in trees. In: Coutts MP, Grace J (eds) Wind and trees. Cambridge University Press, Cambridge, pp 237–263Google Scholar
  32. Telewski FW, Jaffe MJ (1986a) Thigmomorphogenesis: field and laboratory studies on Abies fraseri in response to wind or mechanical perturbation. Physiol Plant 66:211–218PubMedGoogle Scholar
  33. Telewski FW, Jaffe MJ (1986b) Thigmomorphogenesis: anatomical, morphological and mechanical analysis of genetically different sibs of Pinus taeda in response to mechanical perturbation. Physiol Plant 66:219–226PubMedGoogle Scholar
  34. Thompson CS (1982) The weather and climate of the Wairarapa region. New Zealand Meteorological Service, Wellington, New ZealandGoogle Scholar
  35. Tombleson JD, Grace JC, Inglis CS (1990) Response of radiata pine characteristics to site and stocking. In: James RN, Tarlton GL (eds) New approaches to spacing and thinning in plantation forestry. New Zealand Forest Research Institute Bulletin No. 151. Forest Research, Rotorua, pp 229–231Google Scholar
  36. Vogel S (1988) Life’s devices: the physical world of animals and plants. Princeton University Press, PrincetonGoogle Scholar
  37. Watt MS, Turner JA, Mason EG (2000) Study into the influence of genetic improvement on second log branching in radiata pine. N Z J For Sci 30:315–331CrossRefPubMedGoogle Scholar
  38. Whiteside ID (1990) STANDPAK modelling system for radiata pine. In: James RN, Tarlton GL (eds) New approaches to spacing and thinning in plantation forestry. New Zealand Forest Research Institute Bulletin No. 151. Forest Research, Rotorua, pp 106–110Google Scholar
  39. Whiteside ID, McGregor MJ, Manley BR (1987) Prediction of radiata pine log grades. In: Kininmonth JA (ed) Proceedings of the conversion planning conference, New Zealand Forest Research Institute Bulletin No 128, Rotorua, New Zealand, pp 55–70Google Scholar
  40. Woollons RC, Haywood A, McNickle DC (2002) Modelling internode length and branch characteristics for Pinus radiata in New Zealand. For Ecol Manage 160:243–261CrossRefGoogle Scholar
  41. Zhao W (1999) Growth and yield modelling of Pinus radiata in Canterbury. New Zealand. PhD thesis, University of CanterburyGoogle Scholar

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Forest ResearchChristchurchNew Zealand
  2. 2.Breadalbane ForestryHavelock NorthNew Zealand

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