1. Announcements Grades are turned in Lowest grade dropped However, most people had their test or lab dropped

2. Ecology What are the two parts that are required in ecology? Let me draw a scene Things that are living Things that are not living In your notes, quickly jot down 3 things that are living and 3 things that are not living that are required in an environment

3. When we study ecology, do we study the whole earth at one time Not necessarily Usually, we don’t study ecology as a whole. We usually break it into smaller pieces. These smaller pieces are called ecosystems

4. Ecosystems Now back to the ecology question. What are the two parts needed? 1. Living and non-living The same is true for ecosystem Ecosystems consist of a given area’s physical features (abiotic factors) and organisms (biotic factors) Organisms that live together in an ecosystem are called a community

5. Biotic Factors ECOSYSTEM With a community Abiotic Factors

6. In this scene… What is abiotic? What is biotic? How do they relate to each other?

7. Question When we look at Lawndale, was there a school here a year ago? 5 years ago? 10 years ago? 1000 years ago? What has happened to the environment over time? change

8. Change The same can be said for ecosystems. Over time an ecosystem can change. Anyone heard of Death Valley? Long ago it used to be covered by water Now, it is a desert How do they know this? These types of changes require a long period of _____

9. Change and time in an ecosystem Ecosystems changing in response to natural and human disturbances Ecological succession Old inhabitants gradually die or move; new organism move in Examples or causes of ecological succession? Dinosaurs and meteors Grand canyon People and global warming

10. What is a niche? Bay-Breasted Warbler Feeds in the middle part of the tree Yellow-Rumped Warbler Feeds in the lower part of the tree and at the bases of the middle branches Cape May Warbler Feeds at the tips of branches near the top of the tree Spruce tree A niche is the physical and biological conditions in which an organism lives and the way the organism uses those conditions

11. Community interactions How communities in ecosystems interact with each other? Community interactions (definition) Competition (organism use the same resource) Predation (one feeds off another) Symbiosis (two live closely; need the other) Mutualism (both benefit) Commensalism (only one benefits) Parasitism (one benefits, other is harmed)

12. Homework SA 4-2 #1-6

13. Classwork Create a handout/guide for Section 4-2 Drawing #1, include the following 5 LABELED abiotic factors 5 LABELED biotic factors Drawing #2, include a cartoon showing Mutualism Commensalism Parasitism Drawing #3, ecological succession Draw the ecosystem of Lawndale 200 years ago