Invasive Species

Invasive SpeciesCompetition and Succession Disrupted

IntroductionSpecies that evolved in the ecosystems in

which they are found are referred to as NATIVE SPECIES.

When a species that evolved somewhere else is brought into another ecosystem, it is referred to as an INTRODUCED SPECIES.

When an introduced species does so well in its new environment that it threatens the ecological balance of one or more native species it is referred to as an INVASIVE SPECIES.

Native Species of Plants and Animals in Pennsylvania

http://www.whitetailbsa.org/whitetail.jpg

http://www.netstate.com/states/symb/flowers/images/mountain_laurel.jpg

http://projects.juniata.edu/currents/kids/Brooktrout.jpg

Introduced Species of Plants and Animals in Pennsylvania

http://www.fish.state.pa.us/pafish/raintrtm.jpg

http://www.hort.purdue.edu/ext/senior/fruits/images/large/walnutenglishtree.jpg

http://ohric.ucdavis.edu/photos/fullsize/Japanese-maple.jpg

Invasive Species of Plants and Animals in Pennsylvania

http://www.forestry.ky.gov/NR/rdonlyres/DB6C6A0E-9E0D-4014-94FE-26B82E991890/0/PurpleLoosestrife2.jpg

http://wihort.uwex.edu/Phenology/GypsyMoth.html

http://www.pgc.state.pa.us/pgc/lib/pgc/wildlife/feral_swine/hogs3_closeup.jpg

http://plainfieldtrees.blogspot.com/2007/08/ailanthus-altissima-tree-that-grows-in.html

What’s the problem?Invasive Species

Unfair competitionReduction in biodiversity.Altered secondary successionHarmful to local food webs. HybridizationInvasive species negatively impact half of all

organisms listed on the federal endangered species list.

Nationally invasive species cost the US $100 billion each year.

What can you do?Volunteer to help remove invasive species.Landscape with local plantsKeep outdoor gear clean and sanitized.Support businesses that take steps to prevent

the spread of invasive species.