Name: _________________________ Hr. __ NOTES: Invasive Species --- An Introduction I. What is a native species? _____________ species are those that _________________ live and ___________ in a _______________ community. They occupy specific _____________ and have specific _______________ in their native _______________________. They have natural _____________________ that help to keep their ______________________________ in _____________. II. What is a non-native species? A ___________________ living outside its native _____________________ range, which has _______________ there by _______________ activity, either ______________ or accidental. Non-native species are ________ necessarily ____________________. II. What is a non-native __________________________ species? A non-native species that ___________________ affects _______________ and _____________________. IV. Common characteristics of invasive species. Invasive species in general: Have ________ natural _____________, competitors, ________________ or diseases Have high _____________________ rates Are ________________ Are generalists Are _________________ species V. What traits are common to invasive plant species _______________________ Flower early Produces __________________ seed Disperse seed _____________ Grow ______________ Spread ____________________ ________________ competitors VI. Impacts of invasive species ________________ native species: reducing _______________, and reducing ____________ available for ____________ species. Reduce forest __________________ and _________________________. Some invasive species ___________ native species. ____________ Impacts: Example Hemlock wooly adelgid is killing Eastern hemlock trees throughout Pennsylvania and the northeast. Eastern hemlock forests play an important role in maintaining _____________ temperatures and oxygen levels _________________ for brook trout. Killing of Eastern hemlock trees leads to __________________ water temperatures and ______________ levels, and therefore ______________ brook trout _________________. Economic impacts: Invasive _____________________ are responsible for _____________________ economic __________ through loss in agricultural __________________, spread of ______________ that impact humans, and tourism among other impacts. VII. What you can do? When boating, _________________ your boat ___________________ before transporting it to a different body of water. ______________ your boots before you _________ in a new area to get rid of ___________________ weed seeds and pathogens. Don’t ______________ firewood (it can harbor forest pests like emerald ash borer). Don’t _________________ aquarium _________________ and ______________, live bait or other ____________________ animals into the wild. If you plan to own an exotic pet, do your research and plan ahead to make sure you can commit to looking after it. Volunteer at your local park, refuge or other wildlife area to help ____________ invasive species. Help educate others about the threat.