"Food Chains." Maggie's Science Connection. N.p., n.d. Web. 21 May 2016. <http://maggiesscienceconnection.weebly.com/habitats-food-chains--webs-trophic-pyramid.html>.
"How Does Biodiversity Loss Affect Me and Everyone Else?" WWF. WWF, n.d. Web. 21 May 2016. <http://wwf.panda.org/about_our_earth/biodiversity/biodiversity_and_you/>.
"Invasive Species." National Wildlife Federation. National Wildlife Federation, n.d. Web. 21 May 2016. <https://www.nwf.org/Wildlife/Threats-to-Wildlife/Invasive-Species.aspx>.
"Invasive Species: What Can You Do." The Nature Conservancy. Nature Conservancy, 2016. Web. 21 May 2016. <http://www.nature.org/ourinitiatives/habitats/forests/help/invasive-plant-species-invasive-species-education-1.xml>.
Number of Species. Iucnredlist. N.p., n.d. Web. 21 May 2016. <http://www.iucnredlist.org/collections/initiatives/freshwater/southafrica/threats>.
Prevent the Spread of Invasive Species It's the Law. Wisconsin Department of Natural Resources. N.p., n.d. Web. 21 May 2016. <http://dnr.wi.gov/topic/invasives/boat.html>.
"What Is an Invasive Species." Encyclopedia of Life. N.p., n.d. Web. 21 May 2016. <http://eol.org/info/460>.
"How Does Biodiversity Loss Affect Me and Everyone Else?" WWF. WWF, n.d. Web. 21 May 2016. <http://wwf.panda.org/about_our_earth/biodiversity/biodiversity_and_you/>.
"Invasive Species." National Wildlife Federation. National Wildlife Federation, n.d. Web. 21 May 2016. <https://www.nwf.org/Wildlife/Threats-to-Wildlife/Invasive-Species.aspx>.
"Invasive Species: What Can You Do." The Nature Conservancy. Nature Conservancy, 2016. Web. 21 May 2016. <http://www.nature.org/ourinitiatives/habitats/forests/help/invasive-plant-species-invasive-species-education-1.xml>.
Number of Species. Iucnredlist. N.p., n.d. Web. 21 May 2016. <http://www.iucnredlist.org/collections/initiatives/freshwater/southafrica/threats>.
Prevent the Spread of Invasive Species It's the Law. Wisconsin Department of Natural Resources. N.p., n.d. Web. 21 May 2016. <http://dnr.wi.gov/topic/invasives/boat.html>.
"What Is an Invasive Species." Encyclopedia of Life. N.p., n.d. Web. 21 May 2016. <http://eol.org/info/460>.