Several food chains connected together Shows many different
paths of how plants and animals are connected Each level of animal
represents a different trophic level Which is an organisms position
on the food web What is a food web?
Slide 5
Primary Producer: produces own food by photosynthesis Usually
green plants Primary Consumer: animals that consume only plant
matter Aka herbivores-rabbits and cows Secondary Consumer: animals
that eat primary consumers (herbivores) Aka carnivore- owls and
foxes Tertiary Consumer: animals that eat secondary consumers
Carnivores that eat other carnivores Parts of a food web
Slide 6
Model of energy flowing in a community They are measured from
the bottom trophic level to the top Primary Producers Primary
Consumers Secondary Consumers Tertiary Consumers Energy
Pyramids
Slide 7
An average of only 10% of the energy in one trophic level is
passed to the next trophic level 90% is used by previous trophic
level Ten Percent Rule
Slide 8
Energy is used up for daily life activities Not all organisms
that die are eaten by animals on the next trophic level Not all
parts of organisms are eaten and digested for energy Why only
10%?
Slide 9
Amount of energy available in the form of organic matter of
organisms There is a gradual decrease in biomass from producers to
higher trophic levels 2 common types Terrestrial Aquatic Biomass
Pyramids
Slide 10
Slide 11
Why is it inverted (upside down)? Smaller weight of producers
are supporting consumers of a large weight Aquatic Pyramid
Slide 12
Hunting Overfishing Deforestation Human Impact Destroys the
environment in which the organisms eat or make their food Removes
food source for other organism Could lead to extinction of
species