Definitions Ecosystem: A community interacting with the non-living parts of its environment. Biotic: Living organisms in the environment, such as plants or animals. Abiotic: Non-living physical features of the environment, such as soil and water.
Evidence 1: Card Sort Sort the cards into 3 columns. Record your answers in a table like below: BioticAbioticUnsure (or both/can’t agree)
Evidence: Sort contd… Look at those that are in the unsure column. Why were those confusing? Write down the rule that you used to decide if something is biotic or abiotic.
Let’s Practice! For each picture, name as many biotic and abiotic factors as you can for each ecosystem Where do you think the ecosystem boundaries are? (Where does it begin and end?)
What are the Biotic and Abiotic Factors in the Image?
Biotic Trees Fish Moss Bugs Branches Algae Amphibians Birds Snails Plants Animals Leaves roots Abiotic River/water Rocks Oxygen Sand Dirt Sun Clouds Air/atmosphere Glacier?
River Ecosystem Biotic Moss Trees Algae Bacteria Fish Frogs Squirrels Twigs, Leaves, debris Dead animals Micro-organisms Birds Insects Abiotic Sand Water Dirt Rocks Sun Oxygen Bubbles Clouds Gold Mud
Ocean Biotic Human Fish Barnacles Coral Snails Skeletons Shells Algae Sharks Fish eggs Squid Octopus Whales Dolphins Mold Plankton Seaweed/Kelp Abiotic Sand Water Boat Oxygen CO2 Sunlight Rock Metal Minerals
Evidence 2: Courtyard Ecosystem Your group will be assigned an area in the courtyard. List as many biotic and abiotic factors as you can. Write down the boundaries of your assigned ecosystem. What are the Inputs? The Outputs?
Analysis Questions 1. You’re on the beach and find a piece of driftwood. Is it biotic or abiotic? Why? 2. Is a patch of lawn an ecosystem? Explain. 3. What are some biotic & abiotic factors that would affect a plant but not a rabbit?
Summary What did you think about ecosystems before this lesson? What did you learn about ecosystems from this lesson? (Minimum of 3 sentences!!!) What are some further thoughts or questions you have about ecosystems?