IV. DISCUSSION 4.1 Using a simulation as base to create a mapping of the predicted distributions will result in high number of discrepancy with the true number. This is due to most of the area where the vegetables found are in streams with an average width of less than 15 meters while the simulations are usually run on a model with the minimum width 30 meters. 4.2 The status of Water Onion right now is close to being upgraded to critically endangered. This is due to the area of occurrence being only 26 km2 greater than the area defined for critically endangered. In a worse case scenario, it may become extint in the wild in near future because of a severe drop of suitable habitat by 80% in 3 years (2008-2011). Therefore, effective measures to protect and to conserve the Water Onion in a natural habitat (in-situ conservation) for long-term viability and propagation for domestic and international trading rather than collection from natural habitat, are urgently needed. If the above measures cannot lessen its threats, it is prposed that it should be listed in the CITES Apendix III following the treaty under the trades between countries relating to endangered fauna and flora. ACKNOWLEDGMENT This research project was supported by National Research Council of Thailand, 2015. REFERENCES P. Atkinson, and I. Massari, Generalized linear modeling of landslide susceptibility in the Central Apennines, Italy. Computer and Geosciences, Vol.24, pp.373-385. 1988. Department of Agriculture. Data of statistics for export the Water Onion. Ministry of Agriculture and Cooperatives, Bangkok. 2015. D.W. Hosmer, and S. Lemeshow, Applied logistic regression. New York, NY: john Wiley and Sons, Inc. doi: 10.1002/0471722146, 2000. S.J. Phillips, and M. Dudik, Modeling of species distributions with MaxEnt: New extensions and a comprehensive evaluation. Ecography, Vol.31, pp.161-175. 2008. S.J. Phillip, R.P. Anderson, and R.E. Schapire, Maximum entropy modeling of species geographical distributions. Ecological Modelling, Vol.190, pp.231-259. 2006. S. Soothornnawaphat. Report the study distribution of Crinum thaianum J. Schulze in Thailand. International Union for Conservation of Nature (IUCN) office Khuraburi, Phangnga Province. 2010. S. Soothornnawaphat, C. Bambaradeniya and P. Sukpong. 2014. Crinum thaianum The IUCN Red List of Threatened Species Version 3.1 online. Available: www.iucnredlist.org. Ranong Provincial Natural Resources and Environment office. Point present of Crinum thaianum J. Schulze in Ranong and Phangnga Province. Ministry of Natural Resources and Environment, Bangkok. 2012. Thailand Institute of Scientific and Technological Research. Final report Survay and database of extent distribution of Crinum thaianum J. Schulze. Ministry of Science and Technology, Bangkok. 2013. Y. Trisurat, Species modeling in WEFCOM IUCN. 2001. Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 35 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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