AIM: What is an Ecosystem?

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AIM What is an Ecosystem?
Objectives
Describe the parts of an ecosystem using the
vocabulary list
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AIM What is an ecosystem?
Vocabulary
Community, Ecosystem, Population immigration
emigration
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Examine the next Six Slides What do they all have
in common
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What did they have in common?
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How would you define the word population ? All
of the same type of organism living in a certain
place A homogeneous group
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• What are two ways a population may increase in
  size?
• More births than deaths
• Immigration

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• What are two ways a population may decrease in
  size?
• More deaths than births
• Emmigration

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How would an ecologist describe the picture on
the left?
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Organism
Population
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Look at the next two slides What is the
difference between Picture A And Picture B
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Picture A
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Picture B
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What is the difference between Picture A And
Picture B
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How would you define the word Community
? Which picture represents a community A or
B Why
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DEFINITON A community is made up of ALL the
populations that live in a certain place. a
heterogeneous group
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Example In a forest, what might be some of the
differing populations ?
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Which is larger A community or a population?
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Important Note A community is all the
populations living in an area and not the area
itself!
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Question Do members of different populations in
the same community interact with one
another? How? List Example?
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Question Are all of these interactions
deliberate and intentional (ex lion eats zebra)
or Are some of the interactions indirectly
related without any deliberate interaction
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Example Where does a bee get food? Is that direct
or indirect? Do you think the bee said gee, I
got go over there and pollinate those
flowers? Thats an indirect relationship.
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Interactions

• DIRECT
• Predator-Prey
• Herbivores eating plants
• Bee gathering nectar

• INDIRECT
• The nitrogen of poopy which helps the soil
• Scavengers
• Bees pollinating flowers

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Analyze this next picture
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What do you see in this picture?
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Is everything living in this picture?
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Do the populations of this community interact?
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Do the populations of this community only
interact with living things?
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Definition of Ecosystem
All the living things and nonliving things, in an
environment, combined together with their
interactions defines an ecosystem
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Definition of Ecosystem
An Ecosystem is a self supporting unit What does
that mean?
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An Ecosystem must have four characteristics! 1.
Source of energy (99 of the time it is the sun.
(There are some exceptions!) 2. Transfer of
energy. One population using another as food
which transfers the energy.
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An Ecosystem must have four characteristics! 3.
Breakdown of materials Decomposition to raw
materials and minerals 4. Materials and minerals
are recycled to be used over and over again.
(Including water!)
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immigration emigration

• Do population always live in the same place?
• Sometimes they emigrate from their current home
• Or, they immigrate to a new environment

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AIM What are the needs of living things?
Summary
REVIEW VOCABULARY AND THE AIM AND THE
OBJECTIVES
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Objectives
Describe the parts of an ecosystem using the
vocabulary list
Vocabulary
Community, Ecosystem, Population
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AIM What is an Ecosystem

• Class Activity
• Worksheets
• Word Problems

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AIM What is an Ecosystem ?

• Homework
• INTERNET QUESTIONS
• Paragraph