IV. CONCLUSION During the years 2010 and 2015 of monitoring plant diversity and water storage in the DDF at the HHKRDS Center, enables us to conclude that: 1. Species richness decreased by 7 species (7 genera and 4 families), but resulted in a little change of species composition. Species Diversity Index (SWI) of species diversity was reduced from 3.17 to 3.05. Tree density was decreased from 3,865 to 2,336 trees ha-1 caused by the death of many mostly small individuals. 2 . P l a n t bioma s s was i n c r e a s e d from 83.74±12.35 Mg ha-1 in 2010 to 90.65±11.36 Mg ha-1 in 2015; a net. increase of 6.91 Mg ha-1 (1.38 Mg ha-1). The water amounts in plant biomass was icreased from 34.02±4.94 m3 ha-1 in 2010 to 38.70±5.27 m3 ha-1 in 2015; a net. increase of 4.69 m3 ha-1 (0.94 m3 ha-1 yr-1) or 13.80% increase. 3. The study demonstrated that a forested watershed enhances the potential water supply to streams and therefore agriculture. ACKNOWLEDGEMENTS Authors would like to thank the Head and officers of the HHKRDS Center for work permission and facilities during field study. This research received financial support from the NRCT. REFERENCES 1 M. Chang, Forest Hydrology an Introduction to Water and Forests, USA: Taylor & Francis Group, LLC. 2006. 2 C. Homchan, “Influences of Bamboo on Storages of Carbon, Nutrients and Water in Agroforest Ecosystem of Planted Bamboo-Dry Dipterocarp Forest” MSc Thesis, Chiang Mai University, Thailand, May 2014. 3 J.P. Kimmins, Forest Ecology 2nd ed., USA: Pearson Education. 1996. 4 C.J. Krebs Ecology: The Experimental Analysis of Distribution and Abundance 3rd ed., USA: Harper & Row Publishers. 1985. 5 J.J. Landberg and S.T. Gower Applications of Physiological Ecology to Forest Management, USA: Academic Press Inc. California. 1997. 6 Ogawa, H., K. Yoda, K. Ogino and T. Kira, “Comparative ecological study on three main types of forest vegetation in Thailand” II. Plant biomass. Nature and Life in Southeast Asia. 4: 49-80. 1965. 7 K. Ogino, D. Ratanawongs, T. Tsutsumi and T. Shidei, The Primary production of tropical forest in Thailand. “The South-east Asian Studies” 5: (1) 122-154. 1967. 8 C.D. Oliver, and B.C. Larson Forest Stand Dynamics, Updated edition, USA: John Wiley and Sons, Inc. 1996. 9 T. Seeloy-ounkeaw, S. Khamyong and K. Sri-ngernyuang “Variations of plant species diversity along altitude gradient in conservation and utilization community forests at Nong Tao village, Mae Wang district, Chiang Mai province”. Thai J. For, 33 (2): 1-18. 2014. 10 T. Phongkhamphanh, “Plant species diversity and potentials of carbon and water storages in various community forests of Mae Tha sub-district, Mae On district, Chiang Mai province” Msc Thesis, Chiang Mai University, Thailand. 2015. 11 Waring, R. H. and S. W. Running, Forest Ecosystems: Analysis at multiple scales. 2nd ed., USA: Academic Press. 1998. Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 29 Sustainable Development Goals (SDGs): Policy and Practice 27-29 June 2016, Cha-am, Phetchaburi, Thailand
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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