Transcript Invasive Species- How do they effect our ecosystem?

Invasive Species- How do they
effect our ecosystem?
Rosaura Moreno
Biology 20-power point
Dr. Sellers
What is an invasive species?
• “an invasive species is that (1)non-native
(or alien) to the ecosystem under
consideration and (2) whose introduction
cause or is likely to cause economic or
environmental harm, or harm to human
health or other species.”
Synonyms:
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“non-native species”
“Introduced species”
“exotic species”
“non-indigenous
species”
• “alien species”
• “transplants”
• “invasive species”
The Problem!
1invasive species
+ 2 native extinctions
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Environmental epidemic
Statistics of invasive species
Invasive (exotic or non-native) Plants and Animals
Who?
• Plants
– Trees
– Flowers
– Bushes
• Animals
– Aquatic
– Terrestrial
Once upon a time….
• How long have they been in existence?
• How where they introduced?
• Determining factors of historical
existence?
Intentional introductions
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Economical prosperity
Food
Energy
Biological control of pests
Purple loosestrife
Scotch Broom
Flathead catfish
I didn’t do it!
Long horned beetle
Asian zebra mussel
“The Mighty Morphed Species”
• Why do they grow so rapidly?
• How bad is bad?
• Cross breeding!
•before
after
Vicia sativa
Lens
“Don’t judge a book by its cover!”
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Who?
When?
What?
How?
Plants are good for the
environment, or are they?
• "3:1 rule: For every
year you delay
controlling an invasive
plant infestation, it will
take three years to
regain control."
“The Dirty Dozen”
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Zebra Mussel
Purple Loosestrife
Fatheaded catfish
Tamarisk
Rosy wolfsnail
Leafy Spurge
Cont.
• Green Crab
• Hydrilla
• Balsam wooly
Adelgid
• Miconia
• Chinese Tallow
• Brown Tree snake
World War III
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Terrorist attack
They go undetected
The effects could be fatal
It would be hard to fight back
Viruses…. mishap's or intentional?
Conclusion
• “Prevention and additional introductions.”
• “Early Detection and eradication of new
pests.”
• “Control and Management”
• “Protection and recovery of native species
and ecosystem”.
Works cited
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Cieland,E.E and Mooney, HA. “The evolutionary Impact of Invasive Species.” Proceedings of the Untied States of
America.V98 n.10 p.5446-51(my8,2001). General Science Index College of the Sequoias Library, Visalia,
California. 19 Sept.2005.
Melbourne, Melanie Cooper. “Alien Invasion”. New Scientist. V.172.no.2317.p.22(nov.17,2001). General Science
Index College of the Sequoias Library, Visalia, CA.19 Sept. 2005.
The Nature Conservancy. “Combating Invasive Species”. 22 September.2005.
http://www.nature.org/initiatives/invasivespecies/about.
Eco Pros. “Invasive Non-native species”. 22, september.2005. http://www..eco-pros.com/invasive-nonnative_species.htm
Union of Concerned scientist. “Invasive Species”. 22, September.2005.
http://www.ucsusa.org/invasive_speices/invasive-speices-index.html.
Pratt, Robert J. “Invasive Threats to the American Homeland”. Spring 2004. v.34 ilp44(18). Copyright 2004 U.S.
Army War College. http://web2infotrac.galegroup.com/itw/infomark/497/829/71747088w2/purl=rcl_EAIM_0
Polakovic, Gary. Los Angeles Times Main News. “Paradise Losing In Hawaii”. 2,January. 2003.A-1 Copyright
2003. http://wwwinfoweb.newsbank.com.
Google for images.
http://images.google.com/images?q=invasive+U.S.+species&svnum=10&hl=en&lr=&start=20&sa=N
http://images.google.com/images?q=invasive+animals&hl=en
Stein, Bruce A. and Stephanie R. Flack, eds.1996. America’s Least Wanted: Alien Species
Invasions of U.S Ecosystems. The Nature Conservancy, Arlington, Virgina.