Published information and database on regional climate trend is far few in tropical regions especially in South East Asia. Present book Climate Change Impact on ecosystem consists twenty research topics on climate driving forces from South East Asia. These studies are from different geographical locations and ecosystems extended all over Indian continent and beyond. Subject covered in this book are of multi-characteristics and interdisciplinary viz .Impact of climate change in Jhuming the traditional agriculture among the tribal regions of Manipur, Botanical garden network ,coastal stability, water resources of islands, remote sensed data and extreme weather conditions, global temperature variation and monsoon, mitigation , policy aspects and so an. Basic information and data on the impact of climate change on physical, biological and geological systems are an important characteristics of this book. It suggest mitigation and adaptation from basic units of society viz. family / household level. This book is a significant contribution to regional climatic trend and responses from climatic data sparse Indian subcontinent.