food chains and webs

food chains and webs

Producers

Plants

Photosynthesis

Primary Consumers

Herbivores

Eat the producers

Secondary Consumers

Carnivores

Eat the primary consumers

Can also be omnivores ( eating plants and animals)

Tertiary Consumers

Carnivores

Eat the secondary consumers. Many tertiary consumers will occupy a few trophic levels as their diet can vary due to availability of food.

Quaternary Consumers APEX PREDATORS

Carnivores

They have no predators!!!

Food chains

• In your books construct 2 food chains

• Remember all chains start with the Sun!!

Multiple Choice

Which of these is a primary consumer

Multiple Choice

Which of these is a producer?

Multiple Select

Which TWO these are Apex predators?

Multiple Choice

Which one of these is not a producer?

Multiple Choice

Which one of these is a secondary consumer?

Multiple Choice

What is an omnivore?

• eats meat

• eats meat and plants

• eats plants

• doesn't eat anything

Multiple Choice

Which trophic level only eats plants?

• producer

• primary

• secondary

• tertiary

Fill in the Blanks

Where does the energy for a food chain come from?

Multiple Select

Which TWO are tertiary consumers

Multiple Choice

What do the arrows in a food chain represent?

• Who eats who

• Direction the energy is moving

• Which way the animals run

• How big an animal is

Food webs

A food web is the interconnection of many food chains in a single ecosystem

What would happen if the population of one of the organisms changed?

_{What would happen if the grass died?}

• The grass is the producer. If it died, the consumers that feed on it - rabbits, insects and slugs - would have no food. They would starve and die unless they could move to another habitat.

• All the other animals in the food web would die too, because their food supplies would have gone. The populations of the consumers would fall as the population of the producer fell.

  
  

What would happen if the population of slugs decreased?

• Slugs, rabbits and insects all eat grass. If there were fewer slugs there would be more grass for the rabbits and insects to eat. With more food, the populations of rabbits and insects would increase. 

• However, the thrushes would have to eat more insects to maintain their population, so it is also possible that the population of insects could decrease. This in turn may reduce the populations of voles and frogs.

What would happen if the population of insects decreased?

• There would be more food for the rabbits and slugs, so their populations would increase. However, there would be less food for the frogs and voles, so their populations would decrease. This means less food for the foxes and hawks. However, there are likely to be more rabbits and thrushes for them to eat, so their populations might stay the same,