| Intra-annual climate-growth relationships of Quercus castaneifolia at the central part of Hyrcanian forest, northern Iran |
| Paper ID : 1027-ADA2013-FULL |
| Authors: |
|
Siroos Nasiri *1, Kambiz Pourtahmasi2, Achim Bräuning3, Reza Oladi4 1Narmak, Haft hoz sq., Rezvan sharghi st., 32sq., No 6, postal code 1649975563 2P.O.Box 31585-1356 3Kochstrasse 4/4, D-91354 Erlangen 4Department of Wood Science and Technology
Faculty of Natural Resources
University of Tehran |
| Abstract: |
| Climate is the main controlling influence over where and how trees grow. Throughout time, climate changes have dictated the pattern of tree distribution and evolution across the world. Whereas the climate controls tree distribution on a global scale, trees actually influence weather pattern on a regional or local level. Iran, by its geographical and topographical situation, is a contact area of five phytogeographical regions: Euxino-Hyrcanian (In Iran, the Euro-Siberian region is presented by the Euxino-Hyrcanian Province), Turanian, Mediterranean, Saharo-Sindian and Sudano-Decanian. Hyrcanian vegetation zone is a green belt stretching over the northern slopes of Alborz mountain ranges and covers the southern coasts of the Caspian Sea. The high Alborz Mts, are covered by sub-humid oak forest. Among all oak species occurring in Iran, Quercus castaneifolia is characteristic for the Hyrcanian forest, covering an elevation range from coastal area of the Caspian Sea to 2100m altitude in Minu-dasht (Mazandaran). We carried out detailed investigations to obtain a better understanding of the effect of climate on cambial activity of the ring porous Quercus castaneifolia. Our study site is in the research forest of University of Tehran located in the humid mountain forest belt between the settlements Kolyak and Now-Shahr, [36-38°N; 48°-58° E, up to 2000m elevation]. Four Quercus castaneifolia trees have been chosen from the virgin part of the forest. Electronic point dendrometers were installed on every tree and data of radial stem diameter changes have been recorded in 30min intervals. In addition, climate data have been collected from the close-by climate station in Kolyak. By monitoring the fluctuation of seasonal growth in oak trees we are able to study the climate-growth relationships during the growing season. Stem radial-growth measurements will be complemented by micro-core sampling with a Trephor corer in monthly intervals which will allow a better understanding of xylem cell formation |
| Keywords: |
| climate change, Hyrcanian forest, sub-humid oak forest, Quercus castaneifolia, cambium activity, radial growth, ring porous, micro-coring, point dendrometer |
| Status : Abstract Accepted |
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