Ecosystems And Relationships Betweem Organisms

Question 0

How is the types of organisms in an ecosystem primarily determined?

Give an example

Answer 0

• the amount of water
• • most important factor in determining the distribution of plant life **

1. Savannas have a lot of water - a lot of large organisms
2. Deserts do not have a lot of water - smaller organisms

Question 1

What do organisms do?

What are their roles?

Answer 1

Organisms fulfill various roles within an ecosystem
* food web *

1. Producer - gets energy from the sun
   - Plants, grass, trees
2. Primary consumer - eats producer
   - Rabbit
3. Secondary consumer - eats primary consumer
   - Snake
4. Tertiary consumer - eats secondary consumer
   - Hawk
5. Decomposer - breaks down dead organisms
   - Fungi, Bacteria

Question 2

Explain the energy pyramid

Look at the picture

Answer 2

It is based off of how much is available to each layer

Tertiary consumers least 
Secondary consumers 3rd most
Primary consumers 2nd most
Producers have the most
** the more producers - the larger

Question 3

What is a symbiotic relationship?

Answer 3

Organisms live in close interaction with one another

Question 4

What are types of symbiosis?

Answer 4

1. Mutualism
   - both members benefit
   * kasha tree has a stinging insect
   * gives a home insect protects tree
2. Parasitism
   - one member benefits, the other is harmed
   * tapeworm in animal
3. Commensalism
   - one member benefits, the other is unaffected
   * fish eat scraps off of whales

Question 5

What is predation?

Answer 5

Predation is a non-symbiotic relationship in which a predator hunts prey