Invasive Species.docx - Invasive Species Emerging issues of...

This preview shows page 1 - 4 out of 9 pages.

Invasive Species Emerging issues of invasive species As humans move, the possibility of organisms not native to area is high Ex: Great lakes Many terms used in past Nuisance species Invasive species Non-indigenous species Alien species o One that’s not native but doesn’t cause problems Exotic species o Not native but might not cause problems Non-native species Currently accepted definition A species that is non-native or alien to the ecosystem under consideration and whose introduction causes or is likely to cause economic or environmental harm or harm to human health Examples Lionfish o Native to Caribbean now in N. Carolina and Florida o Predators, eliminating native fish o Lionfish challenge Beetle o In Chicago o See what controls it in its native habitat Nutria
o Introduced from China to Louisiana o Herbivores that eat big plants o Purpose: Clear bayous o Wiped out all vegetation Snakehead fish o Maryland o Can walk on land for thousands of meters Piranha o Caught near Diversey harbor o Native to Amazon o Example of one that will not become established Burmese python o From Burma o Everglades o Replaced alligator o Lay egg layers, grow quickly o Introduced as pets that were set free Brown tree snake o 4 ft long o Wiped out birds on Guam o Ate rodents and pets when done with birds o Cause power outages when they go into power lines o Control US forest service Acetaminophen injected into mice Great Lakes o Invasive and non-native o A new species gets introduced every 2.5 months o Most of the more abundant organisms are non-native o Most of the introduced species are plants o Disease 2
VHS: Viral hemorrhagia septicemia o Examples of introduced species Alewife Washes ashore in may-june Zebra mussels White perch Non-invasive Silver carp Flying fish Sea lamprey

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture