| Relationship between seasonal cambial activity and climatic factors of Hopea avellanea Heim. and Cleidion spiciflorum Merr., Trat Province, Thailand |
| Paper ID : 1025-ADA2013 |
| Authors: |
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Natthanan Tadang * Faculty of Environment and Resource Studies, Mahidol University, Salaya, Phutthamonthon, Nakhon Pathom 73170, Thailand |
| Abstract: |
| Tropical rainforest is home for thousands of living thing. Rainforest are being destroy, direct and indirect, especially at the same area of tropical forest area which has two purpose. One is to protect biodiversity and the other is promoting for tourist. It seems that their objective is again. Chang Island is beautiful scenery, tourist attractive and also it is announcement as national park. Few tree species have been intensive investigate. Unfortunately illegal logging, forest degradation can see overall. In addition report of IPCC was warning about climate change impact to biodiversity of tropical rainforest. The Forest Department in Thailand has only experience to classify forest type however research on specific tree species are scare in Thailand. Hopea avellanea Heim. is a plant in a family Dipterocarpaceae. It is dominant specie of Koh Chang National Park. And Cleidion spiciflorum Merr. is a plant in a family Euphorbiaceae. It is one of dominant specie in top ten important tree species that can find at Koh Chang National Park as well. This study is intended to investigate the relationship between the cambial activity of Hopea avellanea Heim. and Cleidion spiciflorum Merr. with climatic factors (e.g. rainfall, temperature and soil moisture) in moist evergreen forest on Chang Island, Trat Province, Thailand. Cambial samples were collected once a month from December 2011 to May 2012, resulting in total of 4 samples from 2 trees in every month. And samples of cambial were collected twice a month from June to November 2012, a total of 8 samples in every month. The sample size was about 2 cm × 2 cm with a depth of 1 cm. In each tree, two blocks were excised from both contour-parallel sides. The samples were prepared by the polyethylene glycol 1’500 technique. The cambial activity was investigated by counting undifferentiated cells in the cambial zone. The dendrometer equip in June to November 2012 for observations on the growth behavior and formation of the successive cambial of Hopea avellanea Heim. and Cleidion spiciflorum Merr. The relationship between cambial activity and climatic factors were examined by Pearson’s correlation. The information in this study helps to understand the influence of climatic factors on tree growth. |
| Keywords: |
| cambial activity, Hopea avellanea Heim., Cleidion spiciflorum Merr., climate, Trat, Thailand |
| Status : Abstract Accepted |
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