Transcript Powerpoint
Unit 7, Lesson 6: Animal Populations & Environments Special Relationships in Wildlife Let’s Learn About Animal Populations and Environments 1 I. Many relationships are formed around organisms obtaining energy through feeding. a. Autotrophs: Organisms that use energy from the sun or energy stored in chemical compounds to manufacture food. Examples: Plants Some single-cell organisms 2 I. Many relationships are formed around organisms obtaining energy through feeding. b. Heterotrophs: Organisms that depend on other organisms as their source of nutrients and energy. i. ii. Consumers – can’t make their own food. Herbivores: Feed directly on autotrophs Examples: Cattle, rabbits, grasshoppers iii. Carnivores: Eat other Heterotrophs Examples: Lions 3 More Heterotrophs Scavengers: Some feed on carrion, refuse and dead Examples: Black vultures, buzzards, ants, beetles v. Omnivores: Organisms that eat a variety of foods that include both plant and animals materials. Examples: Humans, raccoons, coyotes, bears vi. Decomposers: break down the complex compounds of dead and decaying plants and animals. iv. Examples: Bacteria, fungi, protozoan 4 II. Other relationships are formed around organisms for survival a. Predator-prey: Some animals must kill others for food for survival Examples: Lions kill gazelle & wildebeests 5 II. Other relationships are formed around organisms for survival b. Symbiosis: A close and permanent association between organisms of different species. i. Commensalism: one species benefits and the other species is neither harmed nor benefited. Example: Spanish moss growing on a tree. ii. Mutualism: Both species benefit. Example: Ants on the acacia tree iii. Parasitism: One organism derives benefit at the expense on another, but without killing it. Examples: Fleas, ticks, tapeworms, roundworms 6 Did you record all the important terms? Autotrophs Heterotrophs Omnivores Herbivores Carnivores Scavengers Decomposers 7 Predator-prey Commensalism Mutualism Parasitism Lets Practice! Take 2 minutes to quiz the person next to you over these terms.