2. What is Ecology?What is Ecology?
• Ecology is the study of
relationships between living
things and between living
things and their environment.
3. What is an ecosystem?What is an ecosystem?
• Ecosystem is a system of living
things that interact with each
other and with the physical world.
• A Biome is a collection of related
ecosystems.
4. Ecosystems Living ThingsEcosystems Living Things
• Ecosystems-include all different kinds of
living things that live in a physical
environment and interact with each other.
• a. Producers-plants
• b. Consumers-animals
• c. decomposers- bacteria
• They form an interdependent community
needed to sustain life.
•
7. However……..However……..
• An ecosystem can be as large as the
Sahara Desert, or as small as a
puddle!!!
• Ecosystems are more than just the
organisms they contain.
Geography,weather,climate and
geologic factors also influence the
interactions within an ecosystem.
8. Abiotic FactorsAbiotic Factors
Are nonliving physicalAre nonliving physical
factors of an environment.factors of an environment.
Abiotoic Factors include amount of waterAbiotoic Factors include amount of water
and oxygen, temperature, amount ofand oxygen, temperature, amount of
sunlight and water pressure.sunlight and water pressure.
9. YOU TRY!!!YOU TRY!!!
List three moreList three more
examples of Abioticexamples of Abiotic
Factors:Factors:
10. Biotic FactorsBiotic Factors
• Are the living, physical
factors of an environment.
• Examples of Biotic Factors are plants,
animals, etc.
11. BalanceBalance
Ecosystems will fail if they do notEcosystems will fail if they do not
remain in balance.remain in balance.
No community can carry moreNo community can carry more
organisms than its food, water andorganisms than its food, water and
shelter can accommodate.shelter can accommodate.
Do ecosystems change over time?
12. How do they stay balanced?
To succeed in an ecosystem, plants
and animals have special structures
and behaviors called adaptations.
Ex) Chameleon
Polar Bear
Can you think of more examples of
adaptation?
13. Forest Ecosystems
Forest fires and effect on
ecosystems should be or
not be allowed to burn?
Wildfire is a part of nature.
It plays a key role in
shaping ecosystems by
serving as an agent of
renewal and change.
16. What is the different between a
food web and food chain?
a food chain is a linear
series of organisms
dependent on each
other for food, a food
web is an
interconnected set of
food chains in the same
ecosystem.
17. Prey and Predators
A predator is an organism that eats another organism. The prey is
the organism which the predator eats. Some examples of predator
and prey are lion and zebra, bear and fish, and fox and rabbit.
Do organisms higher in the food web eat
everything that is lower in the food web?
Logic and mathematical theory suggest that when prey are
numerous their predators increase in numbers, reducing
the prey population, which in turn causes predator
number to decline. The prey population eventually
recovers, starting a new cycle.
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www.worldofteaching.com
http://www.worldofteaching.com is home to over a
thousand powerpoints submitted by teachers. This is a
completely free site and requires no registration. Please
visit and I hope it will help in your teaching.
