WS = 189 (D2H)0.902 WB = 0.125Ws1.204 1/WL = (11.4/Ws0.90) + 0.172 Where WS = stem biomass in kilogram WB = branch biomass in kilogram WL = leaf biomass in kilogram Units of stem diameter (D) and tree height (H) were in meter. Root biomass was calculated using this equation, as found in 7. WR= 0.026 (D2H)0.775 Units were in kilograms for root biomass (WR), centimeters for stem diameter (D), and meters for tree height (H). 4. Carbon in plant biomass Carbon amounts in tree biomass were calculated by multiplying biomass with average carbon contents in plant tissues, as in 8. The carbon contents in stem, branch, leaf and root of 62 species in Thailand were reported to be 49.90%, 48.70%, 48.30% and 48.20%, respectively. III. RESULTS AND DISCUSSION 1. Species richness and composition in relation to parent rock Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 285 Sustainable Development Goals (SDGs): Policy and Practice 27-29 June 2016, Cha-am, Phetchaburi, Thailand 1.1 DDF Sandstone: A total of 60 species representing (50 genera and 31 families) existed in the forest, and most areas were dominated by Hiang. Species with 100% frequency were Hiang, G. usitata, Teng, Pluang and Rang. Average density was 3,706 trees ha-1. Hiang had the highest density, followed by Teng, G. usitata, M. scutellatum, Rang and Pluang. Hiang had also the highest dominance, followed by G. usitata, Pluang, Teng and Rang. Hiang had the highest IVI (23.19%), followed by G. usitata, Teng, Pluang and Rang. Volcanic rocks: A total of 115 species (representing 88 genera and 47 families) were found. Most of the area was dominated by Teng and Rang. Teng had 100% frequency. Species with >80% frequencies were Pluang, Rang, Dalbergia assamica, Gardenia obtusifolia and Semecarpus albescens. Hiang had 8% frequency. Average density was 3,019 trees ha-1. Teng had the highest density, followed by Rang, X. xylocarpa and Pluang. Teng had the highest dominance, followed by Rang, Pluang and X. xylocarpa. Teng had the highest IVI (19.65%), followed by Rang and Pluang. 1.2 MDF Sandstone: A total of 125 species (representing 99 genera and 40 families) were observed. Dominant trees were teak, X. xylocarpa, Terminalia mucronata and Lagerstroemia duperreana. Tree species which had 100% frequency were X. xylocarpa, Irvingia malayana. Teak had 80% frequency.Average density was 3,973 trees ha-1. X. xylocarpa had the highest density, followed by L. duperreana, H. cordifolia and D. assamica. A bamboo, Dendrocalamus membraneceus had the highest dominance, followed by I. malayana, X. xylocarpa, and teak. The bamboo had also the highest IVI (9.03%), followed by X. xylocarpa, I. malyana, T. mucronata, teak. Shale: A total of 119 species (representing 96 genera and 45 families) were found. Most areas were dominated by the bamboo. Other dominant trees were teak, X. xylocarpa, L. duperreana and T. mucronata. These dominant species had low frequencies, 20-60% that implied a distribution in patches. Average density was 2,618 trees ha-1. X. xylocarpa had the highest density, followed by L. duperreana,
Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand
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