Relationships in Ecosystems

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Relationships in
Ecosystems

Can you remember what an ecosystem is?


What are the two factors that make up an ecosystem?

Relationships in Ecosystems

Organisms in an ecosystem interact in different ways to survive. These interactions can be beneficial, harmful, or neutral.

• ​Relationships help to keep ecosystems balanced

• Every organism has a role that impacts others

Competition

Competition: When two or more organisms need the same resource (food, water, shelter), they must compete to survive.

Can you think of any examples of competition?

Predation

Predation: A predator hunts and eats its prey. This helps control population sizes and keeps the ecosystem balanced.

​We are about to watch a video where one lizard has to run away from hundreds of snakes. Whose team are you on?

What happens when there's too many predators?

What happens when there's too many predators?

Mutualism

One benefits, the other is not affected.

Commensalism

One benefits, the other is harmed

Parasitism

Both animals benefit.

Hotspot

Click on the predator in the image.

Multiple Choice

Which of these is an example of competition?

• Two kangaroos fighting over a waterhole

• A crocodile eating a fish

• A bird building a nest in a tree

• A bee pollinating a flower

Multiple Choice

What type of relationship is it when an organism benefits while harming its host?

• Mutualism

• Commensalism

• Parasitism

• Predation

Categorize

Options (12)

A lion hunting a zebra

A mistletoe plant taking nutrients from a tree

A clownfish living in a sea anemone, both benefiting

Barnacles living on a whale without harming it

A tick sucking blood from a kangaroo

A cleaner fish removing parasites from a shark

An orchid growing on a tree branch without harming the tree

A crocodile eating a fish

A wasp laying its eggs inside a caterpillar, killing it

A bee collecting nectar from a flower while pollinating it

A remora fish hitching a ride on a shark

A fox hunting a possum

Sort the following relationships into the correct category:

Predation

Mutualism

Commensalism

Parasitism

Labelling

In this picture, label the predator and the prey.

Drag labels to their correct position on the image

Predator

Prey

Labelling

In this picture, label the predator and the prey.

Drag labels to their correct position on the image

Prey

Predator

Labelling

In this picture, label the predator and the prey.

Drag labels to their correct position on the image

Predator

Prey