Ecosystem dynamics: Clark’s nutcrackers and the white bark pine | Khan Academy

Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate or volunteer today! Donate here: https://www.khanacademy.org/donate

Volunteer here: https://www.khanacademy.org/contribute

Credits:
Bird call: “XC629536, Clark's Nutcracker, Nucifraga columbiana” by Richard E. Webster, licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0):
https://xeno-canto.org/629536
https://creativecommons.org/licenses/by-nc-sa/4.0/

“Mount Rainier reflects in a small lake at the top of the Tatoosh Range” by U.S. National Park Service [Public domain], via Wikimedia:
https://commons.wikimedia.org/wiki/File:Mount_Rainier_and_lake_reflection.jpg

“Clark's Nutcracker at Moraine Lake, Banff National Park” by Gunnsteinn Jonsson, licensed under a Creative Commons Attribution License (CC BY 3.0): https://commons.wikimedia.org/wiki/File:Clark%27s_Nutcracker_560.jpg
https://creativecommons.org/licenses/by/3.0/

“Rocky Mountains around Mount Ida, Rocky Mountains National Park” by DXR, licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
https://commons.wikimedia.org/wiki/File:Rocky_Mountains_around_Mount_Ida,_Rocky_Mountains_National_Park_20110824_2.jpg
https://creativecommons.org/licenses/by-sa/4.0/

“Clark's Nutcracker (Nucifraga columbiana)” by Ron Knight, licensed under a Creative Commons Attribution License (CC BY 2.0):
https://commons.wikimedia.org/wiki/File:Clark%27s_Nutcracker_(Nucifraga_columbiana)_(20324832876).jpg
https://creativecommons.org/licenses/by/2.0/

“Geographical distribution of Clark's nutcracker” by Cephas, licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
https://commons.wikimedia.org/wiki/File:Nucifraga_columbiana_map.svg
https://creativecommons.org/licenses/by-sa/4.0/

“Clark's Nutcracker: Nucifraga columbiana” by LassenNPS, licensed under a Creative Commons Attribution License (CC BY 2.0):
https://commons.wikimedia.org/wiki/File:Clark%27s_Nutcracker-_Nucifraga_columbiana_(9401136533).jpg
https://creativecommons.org/licenses/by/2.0/

“Clark's nutcracker (Yellowstone National Park, 2021-08-10)” by Steven Pavlov, licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
https://commons.wikimedia.org/wiki/File:Clark%27s_nutcracker_(Yellowstone_National_Park,_2021-08-10),_01.jpg
https://creativecommons.org/licenses/by-sa/4.0/

“Whitebark pine, Okanogan NF” by Jsayre64, licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
https://commons.wikimedia.org/wiki/File:Whitebark_pine,_Okanogan_NF.JPG
https://creativecommons.org/licenses/by-sa/4.0/

“Whitebark Pine Pinus albicaulis foliage and cone, early August, Crater Lake National Park, Oregon” by Richard Sniezko, US Forest Service Dorena Genetic Resource Center [Public domain], via Wikimedia Commons:
https://commons.wikimedia.org/wiki/File:Pinus_albicaulis_Sniezko2.jpg

“Clark's Nutcracker at Moraine Lake, Banff National Park” by Gunnsteinn Jonsson, licensed under a Creative Commons Attribution License (CC BY 3.0):
https://commons.wikimedia.org/wiki/File:Clark%27s_Nutcracker_560.jpg
https://creativecommons.org/licenses/by/3.0/

“Nucifraga columbiana Pinus flexilis” by Alan Vernon, licensed under a Creative Commons Attribution License (CC BY 2.0):
https://commons.wikimedia.org/wiki/File:Nucifraga_columbiana_Pinus_flexilis.jpg
https://creativecommons.org/licenses/by/2.0/

“Pinus albicaulis 7026.JPG” by Walter Siegmund, licensed under a Creative Commons Attribution License (CC BY-SA 3.0):
https://commons.wikimedia.org/wiki/File:Pinus_albicaulis_7026.JPG
https://creativecommons.org/licenses/by-sa/3.0/

“Clark’s Nutcracker” by Yellowstone National Park [Public domain], via Wikimedia Commons:
https://commons.wikimedia.org/wiki/File:Clark%27s_nutcracker_(30915738301).jpg