Invasive Species Human Impact on Ecosystems Filipova, Teodora Jetcheva, Laura Kalpakov, Peter Raynova, Ema Section 10/4
Invasive species  1 <ul><li>Non-native (alien) to the specific ecosystem </li></ul><ul><li>Introduction harms/ is likely t...
Ecological problems  4,7 <ul><li>Vectors for new diseases </li></ul><ul><li>Alter ecosystem processes </li></ul><ul><li>Ch...
Economic problems  4 <ul><li>Reduce the value of land and water for human activities </li></ul><ul><li>- a lot of food and...
Methods of introduction  2 <ul><li>Unintentionally by people traveling </li></ul><ul><li>Shipping </li></ul><ul><li>Pets r...
Preventing introduction  2 <ul><li>Preventing spread after introduction is very difficult once the species has begun to es...
Actions after introduction  3 <ul><li>Early detection </li></ul><ul><li>Quick response – all methods are very expensive an...
Rattus norvegicus  (Brown rat)  4 <ul><li>Location </li></ul><ul><ul><li>Native to the South East of Siberia, North of Chi...
Cause  4 <ul><li>Synanthropic species (=ecologically associated with humans) </li></ul><ul><li>Maritime and terrestrial tr...
<ul><li>Decreases populations of small mammals, birds, and reptiles due to competition </li></ul><ul><li>Reservoir and vec...
Angiopteris evecta (Giant Fern) <ul><li>Location </li></ul><ul><li>- Abundant in Hawaii, Costa Rica, and Jamaica </li></ul...
Cause  5 <ul><li>People use it for ornamenting and thus, grow it deliberately </li></ul><ul><li>Natural dispersal of the p...
Impact and Solutions  5 <ul><li>Especially problematic on islands where there are many endemics and relatively disturbed f...
Works Cited <ul><li>&quot;What Is an Invasive Species?&quot; National Invasive Species Information Center. Web. 14 Dec. 20...
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Jetcheva filipova kalpakov raynova 10 4 inv species

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Jetcheva filipova kalpakov raynova 10 4 inv species

  1. 1. Invasive Species Human Impact on Ecosystems Filipova, Teodora Jetcheva, Laura Kalpakov, Peter Raynova, Ema Section 10/4
  2. 2. Invasive species 1 <ul><li>Non-native (alien) to the specific ecosystem </li></ul><ul><li>Introduction harms/ is likely to harm economics, the environment and/or human health </li></ul><ul><li>Plants, animals, and other organisms (e.g. microbes) </li></ul><ul><li>Primarily introduced by human actions </li></ul>
  3. 3. Ecological problems 4,7 <ul><li>Vectors for new diseases </li></ul><ul><li>Alter ecosystem processes </li></ul><ul><li>Change biodiversity (exclude native species) </li></ul><ul><li>- can create monocultures </li></ul><ul><li>Disrupt cultural landscapes </li></ul><ul><li>- native species become extinct – their niche is used by the invasive species </li></ul>
  4. 4. Economic problems 4 <ul><li>Reduce the value of land and water for human activities </li></ul><ul><li>- a lot of food and money are lost each year because of lost crops </li></ul><ul><li>E.g. Areas with abundant invasive species can more easily erode during a flood </li></ul><ul><li>E.g. Weeds provide less streamside cover </li></ul><ul><li>- increase stream temperature </li></ul>
  5. 5. Methods of introduction 2 <ul><li>Unintentionally by people traveling </li></ul><ul><li>Shipping </li></ul><ul><li>Pets released into the wild </li></ul><ul><li>Through exchange of different materials (e.g. wood can carry insects) </li></ul>
  6. 6. Preventing introduction 2 <ul><li>Preventing spread after introduction is very difficult once the species has begun to establish </li></ul><ul><li>Better knowledge of the risks introduction may impose </li></ul><ul><li>Legislation and regulations for purposeful introduction of invasive species </li></ul>
  7. 7. Actions after introduction 3 <ul><li>Early detection </li></ul><ul><li>Quick response – all methods are very expensive and difficult to carry out </li></ul><ul><li>E.g. Farmers spray against, cut and mow invasive weeds in their fields </li></ul>
  8. 8. Rattus norvegicus (Brown rat) 4 <ul><li>Location </li></ul><ul><ul><li>Native to the South East of Siberia, North of China, and Hondo region (Japan) </li></ul></ul><ul><ul><li>Beginning of 18 th century – introduced in all continents except Antarctica </li></ul></ul><ul><ul><li>Continuing introduction to islands </li></ul></ul>http://www.europe-aliens.org/images/factsheetMaps/28_ratnor.jpg http://www.scientific-web.com/en/Biology/Animalia/Chordata/Mammalia/RattusNorvegicus01.html
  9. 9. Cause 4 <ul><li>Synanthropic species (=ecologically associated with humans) </li></ul><ul><li>Maritime and terrestrial traffic </li></ul><ul><ul><li>Trade between central Asia and northern European countries </li></ul></ul><ul><ul><li>Ships with timber from England and Norway </li></ul></ul><ul><ul><li>Migration to the Americas </li></ul></ul>
  10. 10. <ul><li>Decreases populations of small mammals, birds, and reptiles due to competition </li></ul><ul><li>Reservoir and vector of disease (hepatitis E) </li></ul><ul><li>High expenses for controlling its population </li></ul><ul><li>Capture via traps </li></ul><ul><li>Chemical poisoning (toxic baits) </li></ul>Impact and Solutions 4
  11. 11. Angiopteris evecta (Giant Fern) <ul><li>Location </li></ul><ul><li>- Abundant in Hawaii, Costa Rica, and Jamaica </li></ul><ul><li>Name </li></ul><ul><li>- A type of fern; named ‘giant’ because of its big leaves </li></ul>http://caribbean-direct.com/ http://www.wellgrowhorti.com/page/landscapeplants/Ferns%20&%20Allies/Fern%20List%20A.htm
  12. 12. Cause 5 <ul><li>People use it for ornamenting and thus, grow it deliberately </li></ul><ul><li>Natural dispersal of the plant </li></ul><ul><li>Its seeds are often dispersed by the wind </li></ul>
  13. 13. Impact and Solutions 5 <ul><li>Especially problematic on islands where there are many endemics and relatively disturbed forests </li></ul><ul><li>There is a restriction for cultivation and trade of angiopteris evecta </li></ul>
  14. 14. Works Cited <ul><li>&quot;What Is an Invasive Species?&quot; National Invasive Species Information Center. Web. 14 Dec. 2010. <http://www.invasivespeciesinfo.gov/whatis.shtml>. </li></ul><ul><li>Rissanen, &quot;Introduction of Invasive Species | EHow.com. Web. 14 Dec. 2010. <http://www.ehow.com/about_5509361_introduction-invasive-species.html>. </li></ul><ul><li>InvasiveSpecies.gov . Web. 14 Dec. 2010. <http://www.invasivespecies.gov/index.html.>. </li></ul><ul><li>DAISIE - Home. Web. 14 Dec. 2010. <http://www.europe-aliens.org/>. </li></ul><ul><li>&quot;Issg Database: Ecology of Angiopteris Evecta.&quot; IUCN/SSC Invasive Species Specialist Group (ISSG). Web. 14 Dec. 2010. <http://www.issg.org/database/species/ecology.asp?si=1550&fr=1&sts=&lang=EN>. </li></ul><ul><li>&quot;Rattus Norvegicus.&quot; Scientific-web. Web. 14 Dec. 2010. <http://www.scientific-web.com/en/Biology/Animalia/Chordata/Mammalia/RattusNorvegicus01.html>. </li></ul><ul><li>&quot;Invasive Plants & Weeds | City of West Linn Oregon Official Website.&quot; Home Page | City of West Linn Oregon Official Website. Web. 14 Dec. 2010. <http://westlinnoregon.gov/parksrec/invasive-plants-weeds>. </li></ul>

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