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Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
Invasive species  kendall arthur
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Invasive species kendall arthur

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  • 1. InvasiveSpeciesBy Kendall Arthur
  • 2. Invasive Species “An alien species whose introduction does or is likely to cause economic or environmental harm or harm to human health…” “ „Alien species‟ means, with respect to a particular ecosystem, any species that is not native to that ecosystem.”
  • 3. Threats Disease Predators Competition Hybridization Habitat alteration  Example: Zebra Muscles
  • 4. Disease Invasive species bring diseases not native to the ecosystem Detrimental to native species with no immunity Example:  Asian chestnut blight fungus  180 million acres of forest destroyed  Moth species living in chestnuts became extinct
  • 5. Predators Reduce population sizes  No evolved defenses Extinction  Example: Brown Tree Snake  Introduced to Guam through ship cargo  Eliminated 10 of 11 species of bird species
  • 6. Competition Invasivespecies are more efficient Native species are not as well adapted Example: North American gray squirrels  Introduced to Great Britain and Italy  Driving native red squirrels to extinction  Forage for nuts more efficiently
  • 7. Hybridization Members of two different species mate and successfully reproduce Invasive species is more abundant Genes “flood” the native species  Forces extinction Genotype of native species phased out  No selection for reproductive isolating mechanisms
  • 8. Habitat Alteration Introduced species alter the ecological make up Cause harm to native species Example: Zebra Mussels
  • 9. Zebra Mussels Brought to U.S. (Great Lakes) from Russia in ballast of ships Filter large amounts of water Reduce densities of planktonic organisms Settle in dense masses over expansive areas 30 freshwater mussel species threatened with extinction by competition
  • 10. Zebra Mussels
  • 11. Zebra Mussels
  • 12. Zebra MusselsLuna Pier Beach, Monroe A barge in Twin Cities, County, Michigan Minnesota
  • 13. HumansThe Most Invasive of Species
  • 14. We Industrialize
  • 15. Pollution Chemical pollutants  Pesticides  SO2, CO, nitrogen oxides Changes metabolism  Chemical imbalances
  • 16. Spread of Disease Bringdiseased animals from one place to another and infect native populations  Bird flu  Swine flu Self invasive species  Spread diseases across human populations
  • 17. Spread of Diseases Hawaiian Islands  Habitat fragmentation  Habitat destruction  Alien species  Diseases
  • 18. We Develop
  • 19. Habitat Destruction Development of  Infrastructure  Agriculture Deforestation Waste dumping #1 cause of species extinction
  • 20. Habitat Destruction In Europe, >85% natural habitat destroyed for agriculture California coastal wetlands shrunk by 90% over 150 years 98% usable agricultural area on Earth already developed
  • 21. Deforestation 48% - Subsistence agriculture in poor countries 32% - Commercial agriculture 14% - Commercial Logging 6% - Charcoal and other fuel wood removal
  • 22. Deforestation
  • 23. Deforestation The Tropical Rainforests  Contain 50% of all 10 million species of plants, animals, and insects  50,000 disappear annually due to deforestation  “Lungs of our planet”
  • 24. Deforestation The Amazon Rainforest  If destroyed, U.S. greenhouse gas emissions would increase 50 fold  90 indigenous tribes destroyed  Loss of…  Medicinal knowledge of plants, trees, and other species  Great economic value if sustained
  • 25. Deforestation
  • 26. We Innovate
  • 27. Competition The ultimate competitors Make our own resources Can outcompete any species Exploiting resources
  • 28. Overexploitation Hunting  Medicine  Clothing  Trophies Overfishing  Shark fin soup outlawed in California Overgrazing  Agriculture
  • 29. But who suffers?
  • 30. Extinction Main reason  Human overpopulation of the earth Extinction rate of species accelerated starting 1600 AD 80% of all extinctions due to habitat destruction by humans
  • 31. One last thing….
  • 32. We suffer We pose a threat to future generations We have negative effect on them, but they have no effect on us Must maintain the earth for the future We are the greatest threats to ourselves
  • 33. In Conclusion… Invasive species are a danger to many different ecosystems Humans are the most invasive species What must be done?  Maintenance  Education  Reforms  Protection of ecosystems
  • 34. Sources"FARM: Farm Animal Rights Movement." The Cost of Disappearing Rainforests. Google Blogger, 14 Oct 2010. Web. 21 Nov. 2011.Hogan, C Michael. ”Causes of Extinction." Encyclopedia of Earth. 2010. Web. 21 Nov 2011. <http:// www.eoearth.org/article/Causes_of_extinction? topic=58074>.Hogan, C Michael. “Deforestation.” Encyclopedia of Earth. 2010. Web. 21 Nov 2011. http://www.eoearth.org/ article/Deforestation?topic=58071McGinley, Mark. "Invasive species". Encyclopedia of Earth. 2010. Web. 21 Nov 2011. http://www.eoearth.org/article/ Invasive_species?topic=49513.

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