1st Period - Seating Chart

1. 1st Period - Seating Chart Table 3: Matthew Lanerra Damonyae Lorenzo Table 1: Engel Luther Alexis Tia Table 2: Tiyana Marquis Ahmario Shanice Table 4: Latonya Tneyah Tyshawn Ikeem Table 7: Eric Larry Kaliaah Destiny Table 6: Bobbi Deonte Jasmin John Table 5: Miya Armesha Michael Gregory

2. Unit 1: Ecology Lesson: Interactions Among Organisms

3. Today’s Agenda 10/15/13: • Brief lecture – interactions among organisms, energy flow in ecosystems • Web of Life Activity • Exit Slip

4. Based on what you see, in your notes write definitions for “biotic” and “abiotic.”

5. Biotic: all living things in an ecosystem • Ex: plants, animals, microorganisms • Abiotic: non-living things in an ecosystem • Ex: temperature, sunlight, humidity, water, soil, mineral nutrients (nitrogen, phosphorus, sulfur)

7. Niche versus Habitat • Niche: the role an organism plays in its community; everything an organism does and when and where it does it. • Habitat: where an organism lives; provides an organism with all resources they need to survive.

8. Predation, Parasitism, and Herbivory • Please ask if you need clarification for the above terms. • These are three types of interactions in which one species benefits, while the other is harmed. • Examples?

9. Mutualism & Commensalism • Mutualism Example: • A hummingbird eats nectar from a flower • Commensalism Example: • A bird builds a nest in a tree. In both examples, who is benefitting? How would you define mutualism and commensalism?

10. Producers and Consumers • Primary producers capture energy from the sun or chemicals and store it in the bonds of sugars • Also called autotrophs • Ex: plants and bacteria use photosynthesis and chemosynthesis to obtain energy and nutrients • Consumers rely on eating other organisms to obtain energy and nutrients • Also called heterotrophs • Ex: herbivores, omnivores, carnivores, decomposers, scavengers

11. The Web of Life • For this activity, as you read the Introduction, answer the last questions on your guided notes. • Complete the food web in class, and answer the analysis questions at home if you cannot finish in class. • We will review your answers tomorrow.

12. Energy and Biomass • As organisms feed on each other, matter and energy move through the community’s trophic levels. • Not all energy is transferred 100% efficiently at each trophic level • Ex: burning gas while driving – only 14% actually moves the car down the road; the rest is spent as heat • Same with organisms – energy is burned as heat; only 10% is transferred as usable energy (the rest is “lost” as heat)

13. This energy pyramid illustrates the 10% rule: only about 10% of the energy contained in any given trophic level is transferred to the next highest level. The rest is used to power life processes or “lost” as heat.

14. Practice

15. Energy and Biomass • Biomass is the total amount of living tissue in each trophic level of an ecosystem Organisms at lower trophic levels exist in far greater numbers, with greater biomass, than organisms at higher trophic levels.

16. Building an Energy Pyramid

17. Today’s Agenda – 10/16/13 • Review ACT Practice Questions – 15 min • Review homework – 10/15 min • Continue on with Energy Flow through Ecosystems – guided notes

18. ACT Review • We will spend 10 – 15 min every Wednesday to practice for ACT • You will be working in pairs – with the person sitting next to or across from you at your table • Use whiteboards to answer and explain your question • If you get stuck, ask me – I will help you out

19. ACT Review • At end of 5 mins, we will begin presenting answers/explanations to the class • 1st team member reads the question • 2nd team member gives answer/explanation • NOTE: If we can complete this review within 15 minutes, each team will receive 10 participation points today