TREE-RING LABORATORY, LAMONT-DOHERTY EARTH OBSERVATORY OF COLUMBIA UNIVERSITY. ROUTE 9W, PALISADES, NEW YORK 10964
Voice: (914) 365-8517, Fax: (914) 365-8152


THE SEA DENDRO PROJECT: Dendrometer Band Studies.


by Brendan Buckley, Orawan Tongjit and Suyanee Vesabutr



SEA DENDRO PAGE CULTURALLY MODIFIED TREES



Dendrometer band studies are an important method for determining the onset and cessation of cambial activity in trees. During late 1998 and early 1999 we placed dendrometer bands on trees at two locations in northern Thailand; at the Queen Sirikit Botanic Garden (QBG) near Mae Rim, and at the Mae Na Forest Protection Unit (MNFPU) near Chiang Dao. Our primary species of interest were the three "proven" species: Pinus kesiya and P. merkusii, and Tectona grandis.

FIELDWEEK 99 participants sampling wild mango trees near Mae Rim, northern Thailand.



Similar to the depletion of the teak resource throughout the region, Thailand's pine resource is dwindling under mounting pressures of development and logging, both legal and illegal. The additional impact of gouging and burning by northern Hilltribes has not been properly assessed. The objectives of the CMT project seek to answer several key questions regarding these activities, with a special view toward sound future policy.

1.) What are the physical impacts on growth of Pinus kesiya and P. merkusii?
2.) What is the cultural and/or economic significance of gouging and burning to local Hilltribes?
3.) From a policy standpoint, what is an "allowable" amount of damage per unit area of stem, and what percentage of stems within a stand, if any, should be made available for this activity?

A closer look at the effects of gouging on a Pinus kesiya stem in the backcountry of the Queen Sirikit Botanic Garden, Mae Rim.



Research methods by Tongjit and Buckley are being tested in the relatively controlled environs of the Queen Sirikit Botanic Garden, and at nearby Doi Inthanon National Park. An economic index of the monetary value per unit area of removed stem material, versus a biotic index of assessed physical damage is being developed that will assist policy makers in deciding the best course of action in the future. As noted during field studies in several locations, both pine species seem to be able to tolerate surprisingly extensive damage. Mortality in most noted occurrences seemed to result more from structural failure of the stem where trees have toppled. To what degree the inflicted damage is largely aesthetic is an important aim of the study.

More damage at the Queen Sirikit Botanic Garden.



TREE-RING LABORATORY, LAMONT-DOHERTY EARTH OBSERVATORY OF COLUMBIA UNIVERSITY. ROUTE 9W, PALISADES, NEW YORK 10964
Voice: (914) 365-8517, Fax: (914) 365-8152


SEA DENDRO PAGE TRL HOMEPAGE LAMONT HOMEPAGE