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New method on dendrochronology study in forest ecosystems; two new approaches: Dendro-productivity and Dendro-genetic
Paper ID : 1076-ADA2013
Authors:
Mostafa - Jafari *
Research Institute of Forests and Rangelands, P.O. Box 13185-116, Tehran, I.R. Iran,
Abstract:
Reliability of using dendrochronology method has been approved in numerous studies. Dendrology method applied in dendro-ecology, dendro-climatology and other related studies. Responses of natural ecosystems including trees to climate changes and climate variability are very complex process and easily can not be recognized and indexed. Dendrochronology studies are normally based upon selection of one species and mainly in one location. This paper presents a new method on dendrochronology study in forest ecosystems. Two new approaches was introduced first “Dendro-productivity” for forest wood production and productivities through analysis of the annual rings of different forest hardwood species (minimum of three species); and second “Dendro-genetic” method to recognize genetic variability in forest trees. Outcome of this research is part of a wide range of studies which have been implemented over more than six years started in 2005 to consider climate change impacts on Hyrcanian forest ecosystems. In “Dendro-productivity” we employed dendroecology by selection of at least three dominant tree species in Hyrcanian forest ecosystem such as beech oriental (Fagus orientalis Lipsky), oak (Quercus castaneaefolia C. A. Mey.) and hornbeam (Carpinus betulus L.); in three different elevations along transect line (profile line) from low (for example 400 m), medium (for example 900 m) and high elevation (for example 1250 m). Various behaviors of tree species and their responses to climate changes have been recorded in different elevations. In “Dendro-genetic” method tree rings widths obtained by the cores, were analyzed to study genetic variability in tree species such as Fagus orientalis Lipsky, which was target species in a study collected from Kordkoy forest district in Golestan province. Sample cores were collected along a transect line (profile) in three elevation levels, of 366, 1236, and 1646 meters above sea level. Genetic variability was considered in relation to the different climatic and environmental factors. According to this approach method which implies in very wide range, possibility of recognition of genetic variability was examined.
Keywords:
New Method approach, dendrochronology, dendro-productivity, dendro-genetic, climate change
Status : Abstract Accepted