Alien Invaders:
Assessing Exotic Invasive Species
Unit Summary:
Students will identify and quantify the percentage of alien and invasive plant species present in national parks. Prior to the field study students will familiarize themselves with using a dichotomous key (decision tree) for plant identification by practicing with a BTW online activity. In addition to online practice, the activity “Bean There, Done That” allows students to grasp the importance of random sampling in scientific data collection by studying a sample site where beans are used to represent different plant species. Once the field study is completed, students analyze and report their data and take time to reflect on their unique park experience. Finally, students apply their knowledge and comprehension to research the impact of other invasive alien organisms. Students are encouraged to use the knowledge and experience they’ve gained in the field to engage in a service project such as participating in volunteer removal of invasive exotic plants from area national parks.
Field Study Locations:
- Chesapeake and Ohio Canal National Historical Park
- George Washington Memorial Parkway
- Harpers Ferry National Historical Park
- Manassas National Battlefield Park
- National Capital Parks - East
- Prince William Forest Park
- Rock Creek National Park
Resources:
- Plant Identification is an interactive online activity that helps students practice plant identification and classification using a dichotomous key. This activity uses a visual key based on leaf shapes, margins, and their arrangement on a stem. Students will be introduced to vocabulary needed to use a plant key in the field and learn about common invasive plants found in national parks in and around the nation’s capital.
- Watershed Timeline covers major Potomac Watershed events dating back to the 1500s.
- Watershed Glossary provides definitions and photos for key terminology.
- Preparing for a Field Study provides students with important information on what they must do to ensure a successful and enjoyable field study, including what to wear, bringing a lunch, and other tips on preparing for the day.
- How to Participate includes information on scheduling, training, and preparation.
