1. Relationships in Ecosystems
SPI & SPI
Class Hook: Everything That Eats is Connected video

2. I can DESCRIBE the different types of nutritional relationships that exist among organisms.
I can distinguish among symbiotic, commensal, and parasitic relationships.

3. Vocabulary Commensalism Community Ecosystem Food Chain Food Web
This week you will add the given words to your daily studying. You may still access the Quizlet.
Commensalism
Community
Ecosystem
Food Chain
Food Web
Mutualism
Parasitism
Population
Predator
Prey
Symbiosis

4. What is in an ecosystem?
Biotic factors are the living things in an environment.
Examples:trees, grass, squirrels, turtles, birds
Abiotic factors are the nonliving things in an environment.
Examples: rocks, air, water, soil
An ecosystem is all the living (biotic) and nonliving (abiotic) things in an environment.
Organisms in an ecosystem can be organized into different populations.
A population is all of a single species in an area at a given time.
* All of the coyotes in the forest or all of the southern red oak trees in the forest
Different populations then make up a community_.
A community is all the living things_ in an ecosystem.
*The forest community may include: the forest community may include mushrooms, blue birds, squirrels, worms, oak trees, pine trees

5. Yellow/Green Partners
Describe the populations that can be found in this ecosystem.
Identify 3 abiotic factors and 3 biotic factors.

6. Think About It
Usually, we consider soil an abiotic factor in an ecosystem. Why might soil also be considered a biotic factor?

7. How are food chains alike?
A food chain is the path that energy and nutrients follow in an ecosystem.
The Sun is always the start of a food chain.
Energy moves from the Sun to producers_(organisms that use sunlight to make their own food).
Producers are always the base of every food chain.
Energy moves from producers (plants) to consumers_.
Consumers are animals that eat plants or other animals (must consume or eat their food).
Primary Consumer_ is the first consumer in the food chain.
Secondary Consumer_is the second consumer in the food chain.

9. What are the types of consumers?
An herbivore_ eats only producers.
Examples:
A carnivore_ eats only other animals.
An omnivore_ eats both plants and animals.
Decomposers break down dead or decaying plant and animal material.
Examples:
Scavengers eat leftover bodies after they have started to rot.

11. Yellow/Green Partners
FORMULATE a water food chain.
FORMULATE a land food chain.
Share & Evaluate each other’s work.

12. Think About It
What kind of consumer would be better able to survive in an ecosystem if some of the carnivores died from disease?
What is the fewest number of links a food chain could have? The greatest?

13. What are food webs made of?
A food web is the network of overlapping food chains.
Prey_ is an animal that is eaten by another animal.
A predator_ is an animal that hunts other animals.
In a food web, the arrows show the direction energy is moving.
Arrows point from the prey_ to the predator.
Step into a life-sized Food Web

15. What are symbiotic relationships?
Symbiosis is a relationship between 2 or more organisms that lasts over time.
A symbiotic relationship that benefits both organisms is called mutualism.
*Each organism gain from the relationship.
A symbiotic relationship benefits ONE organism WITHOUT harming the other is called commensalism.
SHOW BEFORE DISCUSS-PRESENT ?

16. What are parasites?
Some partnerships are harmful for individuals in the relationship.
Parasitism is a symbiotic relationship where one organism benefits and the other is harmed.
A parasite lives in or on a host organism and benefits from the relationship.

17. Symbiosis Cha-Cha Slide