Unit%208:%20Ecology

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Unit 8 Ecology

• Do Now
• Objective
• Define ecology, ecosystem, abiotic factor, biotic
  factor, biosphere, ecosystem, community, and
  population
• Identify four major impacts humans have had on
  the biosphere
• TASK
• 1. What is ecology? What do you know about it
  already?

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What is Ecology?

• the scientific study of the relations that living
  organisms have with respect to each other and
  their natural environment.

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Ecosystems

• An ecosystem is a combination of all of the
  living and non-living things in a place.
• Examples
• Chesapeake Bay
• Baltimore City
• A forest
• Earth
• A teaspoon of soil

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Ecological Factors

• Things in an ecosystem are classified as biotic
  or abiotic factors
• Abiotic factors non-living chemical or physical
  parts of the environment.
• Biotic factors living parts of an ecosystem
  (organisms and groups of organisms)

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Arctic Marine Ecosystem
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Earth at Night

• Drill In 2007, a United Nations report
  completed by 2,000 scientists from over 100
  countries made the following statement
• changes in climate are now affecting physical
  and biological systems on every continent.
• How can this be proven scientifically?

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New Era of Earths History?
Ecology is the study of organisms and how
they interact with the environment in which they
exist. Humans are global organisms that are
having a serious effect on ecosystems around the
world.
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Humanitys Impact
The human population has grown EXTREMELY
large over past several hundred years. It only
makes sense that as The number of
people increases, so does the effect we have on
Earths environments.
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Major Effects Humans Have Had on the Biosphere

• 1 Changing the atmosphere, land, and oceans
  abiotic factors

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Major Effects Humans Have Had

• 2 Destroying ecosystems for human use.

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• WARNING THE PLANET YOU ARE LIVING ON IS
  EXPERIENCING MASS EXTINCTIONS

3 Mass Extinction
Species are becoming extinct at a rate faster now
than any time In the last 65,000,000 years, when
the dinosaurs died off.
Current extinction rate 10,000 100,000
species per year 100 to 10,000 times faster than
normal
Normal extinction rate from fossil record 10
100 species per year
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4 Global Warming
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4 Global Warming
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Effects of Global Warming
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Ecology Example
Walrus Odobenus rosmarus
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The Abiotic parts
Global Warming is changing the environment of
the walrus by reducing the amount of arctic
sea ice it lives on.
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Its Up to You.
Will your children inherit a world without
polar bears and many other species? Knowledge is
power, and fixing these problems will be
tough. What can you do?