invasive species- how do they effect our ecosystem? rosaura moreno biology 20-power point dr....
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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:
• “non-native species”• “Introduced species”• “exotic species” • “non-indigenous
species”
• “alien species”• “transplants”• “invasive species”
The Problem!
1invasive species
+ 2 native extinctions __________________________________
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
• 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 afterLens culinarisVicia sativa
“Don’t judge a book by its cover!”
• 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”
• 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
• 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 • 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-non-native_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.