2.  Endangered specie is a species whose population is so low that the species is at risk of going extinct.  5 of the most common reasons for endangerment are habitat loss, pollution, competition from other species, disease, and predation.

3.  Protect animals habitats  Give the animals space to live  Recycle, reduce, and reuse  Control introduced plants and animals in an area  Plant plants that are native to the area

4.  Indian bat- human disturbance  Northern flying squirrel- deforestation  Dickcissel- human development

5.  American waterwort- competition from invasive wetland species  Appalachian oakfern- deforestation

6.  Invasive species are non-native species that take over an area that was all ready inhabited by native species  Introduced species are non-native species that come into an area by human activity deliberate or some times accidental  Native species are species that are in an area for natural reasons

7.  They can hitch rides on ships  They can be in wood products  They can be in ornamental plants  They could be in the pet trade  Some get smuggled illegally into the US

8.  They can carry diseases  They can change the food webs  They can decrease biodiversity  Some can even effect the soil that they live on

9.  Sea lamprey, Petromyzon marinus, originated in Lake Ontario, it’s niche in both it’s natural and introduced environments are as a parasite, it cause other fish to die.  Asian Clam, Mollusks-Bivalves, originated in Asia, it’s niche in both it’s natural and introduced environments are as a food source for other animals, it decreases biodiversity.  Red-eared slider, Trachemys scripta elegans, it is native to the southern united states, it’s niche is to be a predator and a prey in its natural and introduced environments, it is out competing the native western pond turtle.

10.  Hydrilla, Hydrilla Verticillata, no one is exactly sure where it originated but people think Asia, it’s niche in both it’s natural and introduced environments are to shade the species under the water, This is making it hard for fish to get sunlight.  Purple Loosestrife, Lythrum Salicaria, is native to Europe, it’s niches are to feed certain beetles in it’s natural and introduced environments, it doesn’t give the native plants places to grow.

11.  Reintroduced species are species that got put back into the wild in an area that they formerly lived in.  Extirpated species are species that do not exist in the wild in one area but can be found elsewhere in the world.

12.  The river otter was reintroduced into PA in 1982. The otters were captured by the method of live trapping  75 otters were reintroduced into PA

13.  Endangered specie www.endangeredspecie.com  U.S. department of agriculture www.usda.gov  Game Commission www.pgc.state.pa.us  Thinkquest www.thinkquest.org  Wildlife conservation www.nwf.org  Fish and boat commission www.fishandboat.com  Early journal content www.jstor.org  Google www.google.com