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Transcript
Middle School Science
Dr. Kutscher
INSTRUCTIONAL POWER POINT
ALL LIVING THINGS
NEED ENERGY
In an ecosystem, an organisms’
role depends on:
 How it obtains energy &
How it interacts with the other
living things in the ecosystem
Organism’s energy role is:
Producer
Consumer
Decomposer
Introducing
PRODUCERS
It all begins with plants that
make their own food…..
CONSUMERS CAN BE…
•Herbivores
 eat plants
•Carnivores
eat animals
•Omnivores
Eat plants and animals
DECOMPOSERS ARE
NATURE’S RECYCLERS
• BACTERIA
• FUNGI
• SOME ANIMALS
ECOSYSTEMS
DEPEND ON THE
BALANCE OF THEIR
FOOD WEBS
•The loss of one organism may tip
the delicate balance of survival
for many other organisms within
that ecosystem.
EXPLAIN THE SAMPLE FOOD
CHAINS & WEBS THAT FOLLOW:
• Which is the PRODUCER?
• First level CONSUMERS?
• Second level CONSUMERS?
• Third level CONSUMERS?
• DECOMPOSER?
DECIDUOUS FOREST
FOOD WEB
DECIDUOUS FOREST FOOD WEB
The arrows connect the prey (diet) to the predator
(consumer). The colored dots on the animals are coded to
the colors in the triangular diagram at the upper right.
POND FOOD WEB
FRESHWATER FOOD WEB