Do the students in your class make up a population or a community? Bellringer Do the students in your class make up a population or a community? Directions: Each day when you come in, I will have a Bellringer posted. Write the question and your answer on a piece of notebook paper. Keep this with your notes and add to it each day! I will place any materials needed for each class on the front table for you to grab on your way in.

Objectives By the end of this lesson, you should be able to: define key terms describe the types of interactions studied at each level of organization categorize the factors relating to each level of organization (biotic, abiotic, both) explain examples of studies that could occur at each level of organization

Population Ecology 4 CHAPTER Placeholder opening page, but maybe we can duplicate the look of the SE chapter opener page by using the same fonts and colors (and maybe that Ch 14 icon?)

Lesson 4.1 Studying Ecology Ernst Haeckel defined ecology in 1866 as “the body of knowledge concerning the economy of nature—the total relations of the animal to both its inorganic and organic environment.”

Levels of Ecological Organization Lesson 4.1 Studying Ecology Levels of Ecological Organization Ecology is defined as the study of how organisms interact with each other and with their environments Scientists study ecology at various levels of organization.

Finding Gold in a Costa Rican Cloud Forest Golden toads lived in Costa Rica’s Monteverde cloud forest. Golden toads were first described in 1964. They were extinct by 1989. Talk About It Why is the extinction of the golden toad a global concern?

Interdependence Survival of an organism is dependent on interactions with living & nonliving components of its environment Example: transmission of Lyme disease in forests of the eastern U.S.

Biotic and Abiotic Factors Lesson 4.1 Studying Ecology Biotic and Abiotic Factors Biotic factors: Parts of an ecosystem that are living or used to be living Abiotic factors: Parts of an ecosystem that have never been living Did You Know? Decaying organisms are biotic factors as long as their structure remains cellular.

Habitat The specific environment in which an organism lives Lesson 4.1 Studying Ecology Habitat The specific environment in which an organism lives Habitats provide an organism with resources—anything an organism needs to survive and reproduce, including food, shelter, and mates.