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Invasive species finished_epic

Invasive species finished_epic






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    Invasive species finished_epic Invasive species finished_epic Presentation Transcript

    • Nadya Teneva 10/4 Dimitar Donev 10/4
      • Non-native ; “alien” plants and animals
      • Affect habitats and bioregions
      • Disrupt by invading a region
      • Force native species to decline in population, or even disappear from an area
      • Have : economic, environmental and ecological effect
      • Can be introduce on purpose or by an accident in areas outside of their natural range
      • Non- native affects the area but not negatively
      • Many are artificially introduced, others by accident
      • When the species disrupts the natural balance, reduces biodiversity, degrades habitats, alters native genetic diversity, transmits exotic diseases to native species, and further jeopardizes endangered plants and animals, they are invasive
      • Basically if they do bad stuff to the area, they are invasive
      • May be part of a direct competition for food and resources with native species
      • May compete indirectly – e.g. changing the food web and physical environment
      • May pray on or hybridize with native species
      • Contribute to extinction of some species in certain areas
      • Really dangerous in island environments
      • Are becoming more and more because as global travel and trade increase more pathways for invasive species emerge
      • Are the second leading threat to imperiled species (after habitat destruction)
      • Destruction of environments and crops leads to great economic losses
      • Harmful to animals and even humans -> money spend on vaccines and cures
      • Inability to use the environment for recreational use
      • Making useful species go extinct can also make bad native species flourish
      • A species transported into an area different by its habitat due to human activity
      • Intentional Introduction (usually for economic gain) – 1) purposely released in the wild; 2) accidentally escape from captive and cultivated populations
      • Unintentional Introduction – Species are transported by human vectors
      • 1.Species aren’t prevented from invading
      • 2.EDRR: early detection, rapid assessment, rapid response – effort to reduce negative impacts
      • 3.Too widespread: cooperation and technology used to eradicate species (there isn’t an always working way)
      • 4.Recovery has often have to be artificial
      • Native to many territories in South America
      • Invaded Asia, Japan, West Africa, Middle East, Europe and parts of North America
      • Is responsible for the elimination of Rumex and Nuphar lutea
      • Destroys nests and prays on eggs of aquatic birds (some endangered)
      • Disrupts riverbanks
      • In Italy – 11 million euros costs
      • To fight with it cage trapping, toxicants and more secure fences may be used
      • - Asian tiger mosquito common for woodlands, waste deposits, breeds in tree holes and other water- filled places
      • Native for Southeast Asia, islands of the Western Pacific Ocean and Indian Ocean
      • Invaded the rest of the world (transported)
      • Interspecific competition results in displacement of other mosquito species, both native and invasive
      • Causes biting nuisance
      • Social impact: Potential cause for 22 arboviruses
      • Economic impact is connected to health problems and treatment
      • 1.DAISIE - Home . Web. 08 June 2010. <http://www.europe-aliens.org/index.do>.
      • 2.&quot;Introduced Species.&quot; Wikipedia, the Free Encyclopedia . Web. 08 June 2010. <http://en.wikipedia.org/wiki/Introduced_species>.
      • 3.&quot;NatureServe: Invasive Species.&quot; NatureServe Homepage: A Network Connecting Science with Conservation. Web. 08 June 2010. <http://www.natureserve.org/consIssues/invasivespe cies.jsp>.
      • 4.Taxonomy, Removing. &quot;Invasive Species.&quot; Wikipedia, the Free Encyclopedia . Web. 08 June 2010. <http://en.wikipedia.org/wiki/Invasive_species>.
      • 5. Roques, Alain. &quot;Aedes Albopictus.&quot; DAISIE . 25 Oct. 2006. Web. 15 June 2010. <http://www.europe- aliens.org/pdf/Aedes_albopictus.pdf>.
      • 6. &quot;Invasive Non-native Species.&quot; Eco-pros . Web. 15 June 2010. <http://www.eco-pros.com/invasive_non- native_species.htm>.
      • 7. &quot;Biological Invasions: A Growing Threat.&quot; Issues in Science and Technology . Web. 15 June 2010. <http://www.issues.org/13.4/schmit.htm>.
      • 8. National Invasive Species Council . Web. 15 June 2010. <http://www.invasivespecies.gov/>.