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Environmental

Environmental. BIOLOGY. Introduced Species & Biological Control. Department of Biology Georgia Southern University. Environmental. BIOLOGY. Introduced Species. - A non-native species that has been introduced to an environment, usually as a result of some human activity.

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Environmental

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  1. Environmental BIOLOGY Introduced Species & Biological Control Department of Biology Georgia Southern University

  2. Environmental BIOLOGY Introduced Species - A non-native species that has been introduced to an environment, usually as a result of some human activity. Department of Biology Georgia Southern University

  3. Environmental BIOLOGY Modes of Introduction Accidental: • Air Travel • -Habitat Alteration • -Ships’ Ballast • -Escapes from Agriculture/Horticulture field Intentional: -Agriculture / Economic -Ornamentation (plants) -Pet Trade!!!! Department of Biology Georgia Southern University

  4. Environmental BIOLOGY Biological Control Use “natural enemies” to control an introduced species. - Attempt to: 1. Reduce Population #’s 2. Eliminate (harder to do) Must Be HIGHLY Regulated!!!! Why?.............

  5. Australia - 1788 How did they get they’re jackets so bloody red? Cochineal Insects, of course! The British import a cactus, Opuntia sp., to begin a dye Industry in Australia.

  6. The Cactus Stuck… … The dye industry didn’t !

  7. Jump ahead: 1886 Note: This used to be cattle-grazing land.

  8. Spread by 1920’s What do they do?.....

  9. They nuke it ! This healthy concoction contains arsenic. BUT WAIT!! There’s more……

  10. These things have seeds!!! Seeds that birds eat and disperse! We’d better put a stop to that, too, mate!

  11. LUCKILY: • Someone was using their head and sent biologists to N. and S. America to study the native habitat of Opuntia sp. • Hopefully, a “natural predator” of this cactus would be found and could be introduced to help control Opuntia sp.

  12. 1926 Cactoblastis cactorum!!!!

  13. The Larvae feed on Opuntia sp.!!!!! (And ONLYOpuntia sp.)

  14. Today Stamps! A Cactoblastis Museum!!

  15. The End……….?

  16. Next Lab • Quiz 3 • Effects of Smog on Photosynthetic Activity

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