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Food Chains and Food Webs (What constitutes a food web/chain? (consumers…
Food Chains and Food Webs
Definition
food chain
shows the food relationship between organisms
food web
many food chains linked together
What constitutes a food web/chain?
producers
organisms that can make their own food (e.g. plants)
consumers
organisms that cannot make their own food (e.g. animals)
herbivores
eat only plants (e.g. rabbit)
carnivores
eat only animals (e.g. shark)
omnivores
eat both plants and animals (e.g. chicken)
predators
an animal that hunts and eats other animals
prey
an animal that is being hunted and eaten by another animal
Predator-Prey Relationship
predators control the number of prey in a community by killing them
prey control the number of predators in a community because they are food for the predators
the balance between predator and prey are upset if
a population of organisms is removed
a population of organisms is added
The source of organisms' energy
the sun is the main source of energy for all organisms
only plants trap the energy from the sun directly
the animals that eat plants or other animals will get their energy from the sun indirectly