Responses of litter fall and carbon exchange to El Niño in a secondary dry dipterocarp forest, western Thailand Rungnapa Kaewthongrach1, Sukanya Kammales2; and Amnat Chidthaisong3 The Joint Graduate School of Energy and Environment (JGSEE) and Center of Excellence on Energy Technology and Environment, King Mongkut’s University of Technology Thonburi (KMUTT), Bangkok, Thailand E-mail: rungnapa.kpp@gmail.com1, sukanya.kammales@gmail.com2, amnat_c@jgsee.kmutt.ac.th3 Montri Sanwangsri The Joint Graduate School of Energy and Environment (JGSEE) and Center of Excellence on Energy Technology and Environment, KMUTT, Bangkok, Thailand, and School of Energy and Environment (SEEN), University of Phayao, Phayao, Thailand E-mail: montri.sa@up.ac.th Pariwate Varnakovida Geospatial Engineering and Innovation Center, Department of Mathematics, Faculty of Science, KMUTT, Bangkok, Thailand E-mail: pariwate@gmail.com Phongthep Hanpattanakit Faculty of Environmental Culture and Ecotourism, Srinakharinwirot University, Bangkok, Thailand E-mail: hanpattanakit@gmail.com Abstract-Severe and frequent climate extremes are expected under climate change. Understandings of the responses of ecosystems to such changes are thus crucial for early warning and appropriate impact managements. This study analyzes the amount and dynamics of litter fall and carbon exchange in secondary dry dipterocarp forest during 2009-2016, during which two El Niño years were observed (2009-2010 and 2015- 2016). The litter was collected using litter traps and carbon exchanges above forest canopy were measured by using eddy covariance technique. During El Niño years, less rainfall and lower soil moisture and higher maximum temperatures compared to normal years were observed. The litter fall occurred mainly during the dry season (November to April of the following year). The total litter fall for the whole dry season were 0.43-0.60 kg m-2. During the normal year, the ratios between monthly to total litter fall were highest during February- March with the value of 0.3-0.5. However, during the El Niño years, this was peaked in January with the value of around 0.6. Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the 303 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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