Bending of Pinus jeffreyi in response to wind

Stephen H. Bullock, J. Francisco Martínez-Osuna, Eulogio López-Reyes, José L. Rodríguez-Navarro

Abstract


Aim of study: To evaluate the degree of trunk sway in relation to wind velocity, with varying temporal integration and to compare this relation among seasons.

Area of study: Sierra de Juárez, Baja California, México

Materials and Methods: Displacements of a 19 m tall Jeffrey pine tree were recorded at 6 m from a three dimensional digital compass during one year, at c. 4 Hz. Adjacent wind speed at 6 m was recorded at 1 Hz.

Main results: Sway was essentially unaffected by wind in the same second  but increasing dependence of cumulative displacement on average sustained wind speed was found for intervals of 1 to 60 minutes (r2 up to 0.89).  The relation is generally log-linear but apparently differs in parameters between seasons.

Research highlights: Wind-sway relations are clear from integration of several-to-many minutes. However, to estimate cumulative stress, sub-second data on sway are essential.  Sub-second, precision measurements of sway can be registered from small, inexpensive sensors.

Keywords: biomechanics; Pinus jeffreyi; seasonality; stress accumulation; time series; tree bending.


Keywords


biomechanics, Pinus jeffreyi, seasonality, stress accumulation, time series, tree bending

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References


References

Ezquerra FJ, Gil LA, 2001. Wood anatomy and stress distribution in the stem of Pinus pinaster Ait. Inv Agraria - Sis Rec For 10: 165-178.

Gardiner BA, 1997. Standing up to storms. Biologist 44: 318-321.

Hamilton WL, 2005. Correlation of wind records and proxy wind history from tree rings at Port Angeles, Washington with sodium concentration at Summit, Greenland, and linkages with Gulf of Alaska sea level pressure forcing. Polar Geog 29: 253-290. http://dx.doi.org/10.1080/789610143

Hassinen A, Lemettinen M, Peltola H, Kellomäki S, Gardiner BA, 1998. A prism based system for monitoring the swaying of trees under wind loading. Agr Forest Meteorol 90: 187-194. http://dx.doi.org/10.1016/S0168-1923(98)00052-5

James KR, Haritos N, Ades PK, 2006. Mechanical stability of trees under dynamic loads. Am J Bot 93: 1522-1520. http://dx.doi.org/10.3732/ajb.93.10.1522

James KR, Kane B, 2008. Precision digital instruments to measure dynamic wind loads on trees during storms. Agr Forest Meteorol 148: 1055-1061. http://dx.doi.org/10.1016/j.agrformet.2008.02.003

Lundqvist L, Valinger E, 1996. Stem diameter growth of Scots pine trees after increased mechanical load in the crown during dormancy and (or) growth. Ann Bot 77: 59-62. http://dx.doi.org/10.1006/anbo.1996.0007

Meng SX, Huang SM, Lieffers VJ, Nunifu T, Yang YQ, 2008. Wind speed and crown class influence the height diameter relationship of lodgepole pine: Nonlinear mixed effects modeling. Forest Ecol Manag 256: 570-577. http://dx.doi.org/10.1016/j.foreco.2008.05.002

Schindler D, Schönborn J, Fugmann H, Mayer H, 2013. Responses of an individual deciduous broadleaved tree to wind excitation. Agr Forest Meteorol 177: 69-82. http://dx.doi.org/10.1016/j.agrformet.2013.04.001

Schindler D, Vogt R, Fugmann H, Rodriguez M, Schönborn J, Mayer H, 2010. Vibration behavior of plantation grown Scots pine trees in response to wind excitation. Agr Forest Meteorol 150: 984-993. http://dx.doi.org/10.1016/j.agrformet.2010.03.003

Sheppard PR, May EM, Ort MH, Anderson KC, Elson MD, 2005. Dendrochronological responses to the 24 October 1992 tornado at Sunset Crater, northern Arizona. Can J Forest Res 35: 2911-2919. http://dx.doi.org/10.1139/x05-221

Telewski FW, 1995. Wind induced physiological and developmental responses in trees. In: Wind and Trees; Coutts MP, Grace J (eds). pp: 237-263. Cambridge Univ Press, Cambridge, UK. http://dx.doi.org/10.1017/CBO9780511600425.015

Telewski FW, Jaffe MJ, 1986. Thigmomorphogenesis: Field and laboratory studies of Abies fraseri in response to wind or mechanical perturbation. Physiol Plantarum 66: 211-218.

Telewski FW, Pruyn ML, 1998. Thigmomorphogenesis: a dose response to flexing in Ulmus americana seedlings. Tree Physiol 18: 65-68. http://dx.doi.org/10.1093/treephys/18.1.65

Weinkamer R, Fratzl P, 2011. Mechanical adaptation of biological materials The examples of bone and wood. Mat Sci Eng C 31: 1164 1173. http://dx.doi.org/10.1016/j.msec.2010.12.002

Zipse A, Mattheck C, Gräbe D, Gardiner BA, 1998. The effect of wind on the mechanical properties of the wood of beech (Fagus sylvatica L.) growing in the borders of Scotland. Arboricult J 22: 247-257. http://dx.doi.org/10.1080/03071375.1998.9747208




DOI: 10.5424/fs/2015243-08292

Webpage: www.inia.es/Forestsystems