Surasinghe, T. D. (2006). Impacts of climate change on tropical humid vegetation. Proceedings of the International Conference on Humid Tropical Ecosystems. Changes, Challenges, Opportunities. Organized and hosted by the National Science Foundation of Sri Lanka and National MAB Committee in collaboration with the International Man and Biosphere Reserve Secretariat, UNESCO, Kandy, Sri Lanka. December 2006.

1. EFFECT OF CLIMATE CHANGE ON TROPICAL HUMID VEGETATION Thilina Dilan Surasinghe Department of Zoology University of Sri Jayewardenepura Sri Lanka

2. WHAT IS CLIMATE CHANGE…….? Human activities – industrial and vehicle emission Greenhouse gases like CO 2 , CH 4 , NO to concentrate in the atmosphere Trap IR radiation form sun – Enhanced Greenhouse Effect Increment in the global ambient temperature and sea surface temperature – Global Warming Influences the dynamics of global air currents, hydrological cycle and circulations of the ocean waves Affects all the climate scenarios in global scale changes in rainfall patterns, sea level rise, potential droughts, flash floods, and heat waves.

8. INCREASED VULNERABILITY TO PESTS AND DISEASES Low Productivity Moisture stress Heat stress High energy wastage Metabolic chaos High susceptibility on pest outbreaks and diseases Low immunity Prolonged droughts Growth retardation and regeneration