Download Our Interdependent Ecosystem

A LOOK AT THE FOOD WEB
The plants and animals that are found in a
particular location are referred to as an
ecosystem.
 These plants and animals depend on each other
to survive.
 In a delicate balance, these life forms help to
sustain one another in regular patterns.
 Disruptions to an ecosystem can be disastrous to
all organisms within the ecosystem.

A
food chain shows how each living thing
gets its food. Some animals eat plants and
some animals eat other animals. For
example, a simple food chain links the trees
& shrubs, the giraffes (that eat trees &
shrubs), and the lions (that eat the giraffes).
Each link in this chain is food for the next
link. A food chain always starts with plant
life and ends with an animal.

The organisms in a food chain can be either producers,
consumers, or decomposers.

Producers are green plants capable of making their own food using
energy from the sun in a process called photosynthesis.

Consumers are animals that cannot make their own food. They get their
energy from other plants and animals. A food chain can have as many as
three to four consumers.

Decomposers are also unable to make their own food. Bacteria and fungi
are decomposers. They break down waste products and dead organisms
for food. These broken down materials are returned to the soil to be
recycled and used by plants again.

Most animals are part of more than one food chain and eat
more than one kind of food in order to meet their food and
energy requirements. These interconnected food chains
form a food web.

FOOD CHAINS FOLLOW A SINGLE
PATH AS ANIMALS EAT EACH OTHER.
EXAMPLE:

THE SUN provides food for GRASS

The GRASS is eaten by a
GRASSHOPPER

The GRASSHOPPER is eaten by a
FROG

The FROG is eaten by a SNAKE

The SNAKE is eaten by a HAWK.
FOOD CHAINS follow just one path of energy as
animals find food.

FOOD WEBS SHOW HOW PLANTS &
ANIMALS ARE INTERCONNECTED BY
DIFFERENT PATHS.
EXAMPLE:
 TREES produce ACORNS which act as
food for many MICE and INSECTS.
 Because there are many MICE,
WEASELS and SNAKES have food.
 The insects and the acorns also
attract BIRDS, SKUNKS, and
OPOSSUMS.
 With the SKUNKS, OPPOSUMS,
WEASELS and MICE around, HAWKS,
FOXES, and OWLS can find food.
 They are all connected! Like a
spiders web, if one part is removed,
it can affect the whole web.
FOOD WEBS show how plants and animals are
connected in many ways to help them all survive.