This course examines aspects of diversity, abundance, distribution of flora (plants) and fauna (animals) found in various ecosystems in tropical areas (especially Indonesia) along with the environmental physico-chemical factors that influence them. The ecosystems studied include rainforests, mangroves, estuaries, wetlands and peatlands, karst, marine and coral reefs, lakes, rivers and watersheds (DAS), rice fields and various gardens. Furthermore, this course also examines the role of humans in changing these ecosystems along with the efforts that need to be made to maintain their sustainability.