Levels of Organization

1. Levels of Organization

2. Match the Level of Organization with the correct example… Level of Organization: ORGANISM BIOME COMMUNITY POPULATION BIOSPHERE ECOSYSTEM Examples: EARTH FRESHMEN CLASS JOE CHARGER DECIDIOUS FOREST WESTCHESTER, IL ST. JOSEPH HIGH SCHOOL

3. Match the Level of Organization with the correct example… Level of Organization: ORGANISM BIOME COMMUNITY POPULATION BIOSPHERE ECOSYSTEM Examples: EARTH FRESHMEN CLASS JOE CHARGER DECIDIOUS FOREST WESTCHESTER, IL ST. JOSEPH HIGH SCHOOL 1 5 3 2 6 4

4. Ecology Book Chapters 3 &4

5. What is Ecology? • Ecology is the study of relationships between organisms and their environment • Interactions between organisms in the same environment

6. Energy Flow • Energy is constantly flowing through ecosystems • Energy always starts with the sun! • The sun is the main source of energy for life on Earth!

7. Producers and Consumers • Autotrophs use energy from the environment to make their own food • Also called producers • Heterotrophs rely on other organisms for their energy and food supply • Also called consumers

8. What kind of Consumer? • Carnivore? • Herbivore? • Omnivore? • Detritivore?

9. Feeding Relationships • Energy flows through an ecosystem in one direction, from the sun to producers to consumers • A food chain shows some of the feeding relationships in an ecosystem

10. Producer: Use the sun to make food Secondary (2o) Consumer: Consume primary consumers Primary (1o) Consumer: Consume producers Tertiary (3o) Consumer: Consume secondary consumers

11. Extra Consumers • Sometimes there are consumers beyond the tertiary consumer • Called the quaternary consumer

12. What is the… • Tertiary Consumer? • Primary Consumer? • Producer? • Secondary Consumer? • Quaternary Consumer?

13. https://i.ytimg.com/an_webp/bW7PlTaawfQ/mqdefault_6s.webp?du=3000&sqp=CJD6_OUF&rs=AOn4CLA_3HCm1nUOGfUZGkxrHlzeMhKuPwhttps://i.ytimg.com/an_webp/bW7PlTaawfQ/mqdefault_6s.webp?du=3000&sqp=CJD6_OUF&rs=AOn4CLA_3HCm1nUOGfUZGkxrHlzeMhKuPw Food Webs • When the feeding relationships among the various organisms in an ecosystem form a network of complex interactions, these relationships are called food webs • Food webs link all the food chains in an ecosystem

14. What role in the food web? • Mountain lion? • Tertiary • Ringtail? • Secondary

15. Trophic Levels • Each step of a food chain or food web is called a trophic level • Producers ALWAYS make up the first trophic level • Consumers make up the higher trophic levels

16. Ecological Pyramid • The amount of energy present in each trophic level is different • The higher up the food chain, the less and less energy is present • To show the relative amounts of energy within each level of a food chain or web, ecological pyramids are used

17. Organisms at the bottom of the pyramid have the most biomass

18. 10% Rule • Each trophic level receives about 10% of the energy from the level below it • Where does the energy go? • Movement • Body Heat • Daily Functions

19. 0.1% If the grass receives 1500 kJ of energy, how much energy do the beetles receive? 150 kJ Timon & Pumbaa? 15 kJ Scar? 1.5 kJ 1% 10% 100%

20. Cat Fox 1a. What is doing the eating/The flow of energy in a food chain 1b. Lettuce 1c. Ladybug 1d. Thrush 1e. The sun 2b. Grass 2c. Slug/Thursh/Fox/Rabbit/Cat 2d. Fox/Cat 2e. Rabbit/Slug Thrush Slug Rabbit Grass

21. 3a. Land plant/Tiny water plants 3b. Anything other than the plants 3c. Water plantsWaterfleasDivingbeetleSmallfishPerchHeron 3d. Diving beetle/Water flea 3e. Heron/Perch 3f. Fox and heron decrease/slug, insect, beetle increase/land plant decrease 4. Food webs show all the food chains in an ecosystem. They provide a more complete picture of how energy is flowing in an ecosystem.