Transcript 1. The Question - Baltimore County Public Schools

1. The Question
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How do invasive
species impact SAV
populations in the
Chesapeake Bay?
How do changes in the
SAV populations
impact the
interdependence of
organisms in the
Bay?
Last update: August 2005
Created by Sharon Grimes
BCPS Research Module or Slam Dunk Model, Copyright 2005, Baltimore County Public Schools, MD, all rights reserved. The models may be used for educational, nonprofit school use only. All other uses, transmissions, and duplications are prohibited unless permission is granted expressly. This lesson is based on Jamie McKenzie’s
Slam Dunk Lesson module available at http://questioning.org/module2/quick.html.
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2. ALIENS ARE INVADING!
You will be reading about the Mute
Swan population in the Chesapeake
Bay.
A recent court ruling has made it legal
to kill the mute swan. How will this
decision impact the swan and other
organisms in the Bay? Read on to
discover more…
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Mute Swan – Invasive Species Impact
Speaks for Itself
The hydrilla looks good, but has a
negative impact on the Chesapeake
Bay SAV.
What makes it so negative and how does
it affect the Bay?
• What is Hydrilla?
• Hydrilla – A Harmful Alien Invasion
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Information Sources
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3. The Student Activity
Use the charts to the right to help you
take notes about the alien invaders in
the Chesapeake Bay.
As you read, take notes, keeping in
mind how these invasive species
affect the SAV population in the
Chesapeake. Does the SAV
population affect other aspects of the
Chesapeake Bay ecosytem?
•What does invasive mean?
•What types of organisms are
classified as invasive in the
Chesapeake Bay?
•Where are they found within the Bay?
•When during the growth cycle do they
have an effect on the SAV?
•Why are they harmful to the
Chesapeake Bay ecosytem?
•How will they impact the Bay over
time?
MUTE SWAN WORKSHEET
HYDRILLA WORKSHEET
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4. The Assessment Activity
Will the alien species win out over the
SAV in the Chesapeake Bay?
Can the SAV survive this hostile alien
takeover?
Click here on Excel graph
to enter data about the
Growth of Hydrilla in the Bay.
Use the Excel chart to the right to predict
the effects mute swans and hydrilla will
have on the SAV population in the
Chesapeake Bay over the next 8-10
years.
After completing the Excel chart and
graphing your results use your prior
knowledge and examples from the text
and graph to answer the following:
• If invasive species are not controlled,
what negative effects will they have on
the Chesapeake Bay ecosystems?
• What effects do these invasive species
have on the interdependency of
organisms?
Click here on Excel graph
to enter your data about
Mute Swans and
graph your results.
5. Enrichment Activities
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Here are some other sites on the threats of
invasive species that may be of interest to you!
Mute Swan Facts
Hydrilla
Alien Species Attack
This title has been ripped from the
headlines of The Baltimore Sun dated
May 30, 2020!
The Aliens Have Won!
Write an article using what you have discovered today
that would lend truth to this title. Be sure to include:
•Name of alien species..
•What has occurred for the invaders to win.
•Which species have been defeated
•The impact on the Chesapeake Bay
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6. Teacher Support Materials
Objective: Students will analyze the impact of 2 sample
invasive species in order to explain how human activities
can accelerate many naturally occurring changes in the
Chesapeake Bay
Overarching Question: How do fluctuations in SAV affect
the Chesapeake Bay ecosystems?
Differentiation:
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Guided Practice on graphs as a class
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Low-ability students have option to complete only
Hydrilla graph
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Formulas and Instructions to guide students through
assessment
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Pair share students according to reading ability
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Read aloud articles and take notes as a class.
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Bulleted notes on Inspiration.
Time Management Strategies:
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This lesson is 1 – 45 minute lesson
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Extended activities done at home
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Jigsaw information – assign separate parts to groups of
students
Learning Styles/Preferences: Field Dependent
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Appeals to both Active and reflective
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Analytical and Visual
AVID Strategies:
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Predicting
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Jigsawing
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Notetaking
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Brainstorming – 5 minutes – drill – what is human
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impact?
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Voluntary State Curriculum Goal
Goal 6.0 Environmental Science – Students
will use scientific skills and processes to
explain the interactions of environmental
factors (living and nonliving) and analyze
their impact from a local to a global
perspective.
Indicator 1 Recognize and explain how
human activities can accelerate or
magnify many naturally occurring
changes.
– Identify and describe how human
activities produce change in natural
processes, such as climate change
(acquisition, use, and distribution of
energy resources), development
(erosion, habitat destruction and
introduction of nonnative species)
and cycling of matter (waste
disposal practices).
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