owls eat their prey whole, and regurgitate what they can’t digest (pellet)
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Owls eat their prey whole, and regurgitate what they can’t digest (pellet)
What do you think would be inside these pellets?
Owls eat their prey whole, and regurgitate what they can’t digest (pellet)
We can use owl pellets to understand
predator-prey relationships
What do you think would be inside these pellets?
Owls eat their prey whole, and regurgitate what they can’t digest (pellet)
Unit 2: Organisms and their environment
Area of Study 1Adaptations of organisms
Area of study 2Dynamic Ecosystems
Relationships between
organisms
Components of ecosystems
Flow of energy
Population dynamics
Change to ecosystems
Mutualism & symbiosis
Predator-PreyParasite-Host
Learning outcomes: • To analyse predator-prey relationships (using owl pellets)• To describe the components of an ecosystem
interactions between organisms within a food web (visual organiser - ecological pyramid)
Learning outcomes: • To analyse predator-prey relationships (using owl pellets)• To describe the components of an ecosystem
interactions between organisms within a food web (visual organiser - ecological pyramid )
Learning outcomes: • To analyse predator-prey relationships (using owl pellets)• To describe the components of an ecosystem
interactions between organisms within a food web (visual organiser - ecological pyramid )
Higher order learning task:• To evaluate the practical consequences of disrupting a
food web (introducation of rabbits in Australia)
Owl Pellet Dissection
Owl Pellet Dissection
http://www.kidwings.com/owlpellets/flash/v4/index.htm
Unit 2: Organisms and their environment
Area of Study 1Adaptations of organisms
Area of study 2Dynamic Ecosystems
Relationships between
organisms
Components of ecosystems
Flow of energy
Population dynamics
Change to ecosystems
Mutualism & symbiosis
Predator-PreyParasite-Host
Unit 2: Organisms and their environment
Area of Study 1Adaptations of organisms
Area of study 2Dynamic Ecosystems
Relationships between
organisms
Components of ecosystems
Flow of energy
Population dynamics
Change to ecosystems
Trophic levels(Food chains-Food webs)
Food Chain
Food Chain
PRO
DU
CER
CON
SUM
ERS
Food Chain
Tertiary Consumer
Primary Consumer
Secondary Consumer
Producer
PRO
DU
CER
CON
SUM
ERS
Food Web Food Chain
PRO
DU
CER
CON
SUM
ERS
Food Web Food Chain
Tertiary Consumer
Primary Consumer
Secondary Consumer
Producer
PRO
DU
CER
CON
SUM
ERS
1926: 10,000,000,000 rabbits
1859: 24 rabbits
1990: 600,000,000 rabbits
Why do we need to learn about food webs?
A practical application
How has the introduction of rabbits affected native
Australian flora and fauna?