trophic levels

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 transferredenergy

lost

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