Intro to ECOLOGY Ecology •The study of the interactions among organisms and between organisms and their environment. Sunlight •THE MAIN ENERGY SOURCE FOR LIFE ON EARTH. Autotrophs •Organisms that use sunlight or energy stored in chemical compounds to make food. •What is another name for this? •PRODUCERS TWO TYPES OF PRODUCERS •Photosynthesis using- make food energy from the SUN. EX: PLANTS, ALGAE • Chemosynthesis usingcapture chemical energy because they live in places WITHOUT sun. Heterotrophs • Organisms that rely on other organisms for their energy and food supply. • Also called? Consumers 4 Types of Heterotrophs •Herbivore •Carnivore •Omnivore •Detritivore Herbivore •Eat only Plants. Carnivore •Eat only Animals. Omnivore •Eat plants and animals. Detritivore •Eat plant and animal remains. Decomposers •Break down organic matter.