What do gray wolves, elephants, and parrotfish have in common? They're all keystone species, which means they have an especially large impact on their habitat. SciShow explores how these animals keep their ecosystems running. Hosted by: Olivia Gordon Want more SciShow in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to www.nerdconnerdfighteria.com/ ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Jeremy Peng, Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Saul, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: General www.nature.com/scitable/knowledge/library/keystone-species-15786127 web.utk.edu/~mnunez/Keystones%20Nunez%20Dimarco.pdf Wolves www.yellowstonepark.com/wolf-reintroduction-changes-ecosystem/ www.youtube.com/watch?v=ysa5OBhXz-Q www.researchgate.net/profile/Mark_Boyce2/publication/228623397_Wolves_Influence_Elk_Movements_behavior_Shapes_a_Trophic_Cascade_in_Yellowstone_National_Park/links/09e41508036f97539e000000.pdf ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/25603/RippleWilliam.Forestry.TrophicCascadesYellowstone.pdf www.nps.gov/yell/learn/nature/elkinfo.htm Elephants nationalgeographic.org/encyclopedia/keystone-species/ www.youtube.com/watch?v=hvsWXyIseS0 www.sciencedirect.com/science/article/pii/S1146609X11000154 thinkelephants.blogspot.co.uk/ jmammal.oxfordjournals.org/content/93/3/698 www.sciencenews.org/blog/wild-things/importance-elephant-poop www.livescience.com/5650-frogs-find-home-elephant-dung.html Parrotfish voices.nationalgeographic.com/2014/07/02/to-save-coral-reefs-start-with-parrotfish/ www.icriforum.org/caribbeanreport sustainabledevelopment.un.org/content/documents/1891-Status%20and%20Trends%20of%20Caribbean%20Coral%20Reefs-%201970-2012-2014Caribbean%20Coral%20Reefs%20-%20Status%20Report%201970-2012%20(1).pdf Image Sources: commons.wikimedia.org/wiki/File:%E3%82%A2%E3%82%B9%E3%83%9A%E3%83%B3%E3%81%AE%E6%9C%A8_Aspen_Trees_(8178058710).jpg commons.wikimedia.org/wiki/File:African_Forest_Elephant.jpg commons.wikimedia.org/wiki/File:Ornate_Pygmy_Frog_(Microhyla_fissipes)_%E9%A3%BE%E7%B4%8B%E5%A7%AC%E8%9B%994.jpg commons.wikimedia.org/wiki/File:Microhyla_rubra.jpg commons.wikimedia.org/wiki/File:Sphaerotheca.jpg commons.wikimedia.org/wiki/File:Scarus_vetula_(queen_parrotfish)_(San_Salvador_Island,_Bahamas)_(15548372734).jpg commons.wikimedia.org/w/index.php?title=Special:Search&limit=20&offset=20&profile=images&search=kudu&searchToken=5a246gj4kb5hz9cghc6ro8bc0#/media/File:Kudu_antelope_.JPG archive.org/details/ScienceNationCatchingACoralKiller

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