Invasive Species- How do they effect our ecosystem? Rosaura Moreno Biology 20-power point Dr. Sellers.

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Presentation transcript:

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 mongoose

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 Lens culinaris Vicia 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 (my8,2001). General Science Index College of the Sequoias Library, Visalia, California. 19 Sept 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 The Nature Conservancy. “Combating Invasive Species”. 22 September Eco Pros. “Invasive Non-native species”. 22, september native_species.htmhttp:// native_species.htm Union of Concerned scientist. “Invasive Species”. 22, September Pratt, Robert J. “Invasive Threats to the American Homeland”. Spring v.34 ilp44(18). Copyright 2004 U.S. Army War College. Polakovic, Gary. Los Angeles Times Main News. “Paradise Losing In Hawaii”. 2,January A-1 Copyright Google for images Stein, Bruce A. and Stephanie R. Flack, eds America’s Least Wanted: Alien Species Invasions of U.S Ecosystems. The Nature Conservancy, Arlington, Virgina.