Seasonal dynamics of wood formation in Oriental beech (Fagus orientalis Lipsky) along an altitudinal gradient in the Hyrcanian forest, Iran.

Oladi R, Pourtahmasi K, Eckstein D, Bräuning A (2011)

Publication Language: English

Publication Type: Journal article

Publication year: 2011

Journal

Trees-Structure and Function Springer Verlag (Germany)

Publisher: Springer Verlag (Germany)

Edited Volumes: Trees

City/Town: .

Book Volume: 25

Pages Range: 425-433

Journal Issue: 3

URI: http://link.springer.com/article/10.1007/s00468-010-0517-7

DOI: 10.1007/s00468-010-0517-7

Abstract

The cambium dynamics and wood formation of Oriental beech (Fagus orientalis Lipsky) was investigated during the 2008 growing season in the Nowshahr Hyrcanian forest, Iran (36°N, 51°E). Three study sites were selected along an altitudinal gradient (650, 1,100 and 1,600 m a.s.l.), and cambial activity rates of cell formation and cell maturation were studied on micro-cores collected in intervals of 10–20 days. The cambium reactivation of the low-altitude (L) and mid-altitude (M) trees occurred contemporaneously in late March, and also the consecutive phases of cell differentiation took place almost at the same time; however, the entry into cambial dormancy varied considerably from late August to mid-November. Due to lower temperature, the upper-altitude (U) trees showed a 10-day delay in their cambium reactivation, an earlier entry into cambium dormancy (mid-September) and a slower growth rate resulting in narrower tree rings. Despite these differences, the daily increment rates of the trees at all sites reached maximum values coincidently in the early June. Since the photoperiod is the only common external factor among different sites, it is concluded that the timing of the highest growth rate is controlled by the photoperiod.

Authors with CRIS profile

Achim Bräuning Lehrstuhl für Geographie (Physische Geographie)

Involved external institutions

University of Tehran IR Iran, Islamic Republic of (IR) HafenCity Universität Hamburg (HCU) DE Germany (DE)

How to cite

APA:

Oladi, R., Pourtahmasi, K., Eckstein, D., & Bräuning, A. (2011). Seasonal dynamics of wood formation in Oriental beech (Fagus orientalis Lipsky) along an altitudinal gradient in the Hyrcanian forest, Iran. Trees-Structure and Function, 25(3), 425-433. https://dx.doi.org/10.1007/s00468-010-0517-7

MLA:

Oladi, Reza, et al. "Seasonal dynamics of wood formation in Oriental beech (Fagus orientalis Lipsky) along an altitudinal gradient in the Hyrcanian forest, Iran." Trees-Structure and Function 25.3 (2011): 425-433.

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