1. 1. The Question 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?. 6 Next 12345 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, non- profit 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.http://questioning.org/module2/quick.html

2. 2. ALIENS ARE INVADING! Mute Swan – Invasive Species Impact Speaks for ItselfMute 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 6 Next 12345 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… Information Sources

3. 3. The Student Activity 6 Next 12345 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

4. 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? 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? 6 Next 12345 Click here on Excel graphExcel graph to enter your data about Mute Swans and graph your results. Click here on Excel graphExcel graph to enter data about the Growth of Hydrilla in the Bay.

5. 5. Enrichment Activities 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. 6 Next 12345 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

6. 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: Guided Practice on graphs as a class Low-ability students have option to complete only Hydrilla graph Formulas and Instructions to guide students through assessment Pair share students according to reading ability Read aloud articles and take notes as a class. Bulleted notes on Inspiration. Time Management Strategies: This lesson is 1 – 45 minute lesson Extended activities done at home Jigsaw information – assign separate parts to groups of students Learning Styles/Preferences: Field Dependent Appeals to both Active and reflective Analytical and Visual AVID Strategies: Predicting Jigsawing Notetaking Brainstorming – 5 minutes – drill – what is human impact? 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).. 612345