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Trophic Levels13.3-4
Producers
Primary Consumers
Secondary Consumers
Tertiary Consumers
Trophic Levels
On a piece of paper, copy the chart below. While watching the video, fill in all the creatures into their appropriate category.
Producers 1o Consumers 2o Consumers 3o Consumers 4o Consumers
How did you do
Producers 1o Consumers 2o Consumers 3o Consumers 4o Consumers
Algae SalpsKrillComb Jelly fish
Fish Sea Lions Great white shark
Producers
Primary Consumers
Secondary Consumers
Tertiary Consumers
Herbivore
Carnivores
Autotroph
Heterotroph
Now, take the new terms and place them under each column they belong to.
• Autotroph, Carnivore, Herbivore, Heterotroph
Producers 1o Consumers 2o Consumers 3o Consumers 4o Consumers
Algae SalpsKrillComb Jelly fish
Fish Sea Lions Great white shark
Now, take the terms below and place them under each column they belong under.
• Autotroph, Carnivore, Herbivore, Heterotroph
Producers 1o Consumers 2o Consumers 3o Consumers 4o Consumers
Algae SalpsKrillComb Jelly fish
Fish Sea Lions Great white shark
Autotroph HeterotrophHerbivores
HeterotrophCarnivore
HeterotrophCarnivore
HeterotrophCarnivore
Food Chain
• Linear• They show the flow of energy• Length limited by available energy
Food Web
• Expanded• More complex
• Producers Major plants
• Primary consumers Animals that eat plants
• Secondary consumers Animals that eat herbivores
• Higher consumers More complicated because they may be both secondary and tertiary
• Decomposers Fungi, bacteria that eat the dead
ECOLOGICAL PYRAMIDSPyramid of energy• Least Energy = top consumers• Most Energy = producers
10% of energy available ateach trophic level isconverted into new biomassat above level
Pyramid of numbers• Least = top consumers• Most = producers
Pyramid of Biomassenergy transferred
energylost
tertiaryconsumers
secondaryconsumers
primaryconsumers
producers
75 g/m2
150g/m2
675g/m2
2000g/m2producers 2000g/m2
tertiaryconsumers
secondaryconsumers
primaryconsumers
producers
5
5000
500,000
5,000,0005,000,000producers
