Transcript What makes up an ecosystem? - Burnet Middle School

What makes up an
ecosystem?
 Biotic
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factors
Plants
Animals
Bacteria
Etc.
 Abiotic
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factors
Water
Light
Temperature
Soil
What factors can determine
population size?
 Limiting
factors are things that can limit
the growth of a population
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Ex/ amount of space, food and water,
predators, competition
(See picture on page 319)
Energy flow in an ecosystem
All energy comes from the SUN!!
Producers – carry out
photosynthesis, trapping the
sun’s energy to make food
Consumers – feed on other
organisms
Food Chains and Food Webs..
 Food
chains show
a series of events
where energy flows
through an
ecosystem
 Food
webs show all of
the possible ways
energy can flow
through an ecosystem
(links all the food
chains)
Energy Pyramids..
 Show
the amount of energy that moves
from one feeding level to another in a
food web
 The most energy is available
at the producer level
 As you move up the pyramid,
each level has less energy
available