Population Ecology

Logistic Growth Video – https://youtu.be/rXlyYFXyfIM

012 – Population Ecology

In this video Paul Andersen explains how population ecology studies the density, distribution, size, sex ration, and age structure of populations. Intrinsic growth rate and exponential growth calculations are included along with a discussion of logistic growth. K-selected and r-selected species are explained along with survivorship curves.

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Music Attribution

Intro
Title: I4dsong_loop_main.wav
Artist: CosmicD
Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/
Creative Commons Atribution License

Outro
Title: String Theory
Artist: Herman Jolly
http://sunsetvalley.bandcamp.com/track/string-theory

All of the images are licensed under creative commons and public domain licensing:

Agriculture, U. S. Department of. Whooping Crane in Flight in Texas. USDA Photo by John Noll., March 18, 2011. Flickr: 20110214-USDA-JN-0001. https://commons.wikimedia.org/wiki/File:Whooping_Crane_in_flight_in_Texas.jpg.
“Bird on Branch – Free Animals Icons.” Flaticon. Accessed September 15, 2015. www.flaticon.com/free-icon/bird-on-branch_61289.
“Canada Lynx.” Wikipedia, the Free Encyclopedia, July 25, 2015. https://en.wikipedia.org/w/index.php?title=Canada_lynx&oldid=672981991.
Headquarters, U. S. Fish and Wildlife Service. Adult Whooping Crane (Grus Americana) with Chick., February 23, 2012. Adult Whooping Crane and Chick. https://commons.wikimedia.org/wiki/File:Adult_Whooping_Crane_and_Chick_(6923604379).jpg.
Husthwaite, Ray. English: Survivorship Curves, 23 April 09. Own work (Original text: I created this work entirely by myself.). https://commons.wikimedia.org/wiki/File:Survivorship_Curves.jpg.
Karine, Gill-Weir. “The Whooping Cranes: Survivors Against All Odds,” n.d. http://www.prairiefirenewspaper.com/2010/09/the-whooping-cranes-survivors-against-all-odds.
Robertson, D. Gordon E. English: Snowshoe Hare (Lepus Americanus), White Morph, Shirleys Bay, Ottawa, Ontario, Canada, January 21, 2013. Own work. https://commons.wikimedia.org/wiki/File:Snowshoe_Hare,_Shirleys_Bay.jpg.
Sasata. English: The Whooping Crane, Grus Americana at the Calgary Zoo., September 11, 2010. Own work. https://commons.wikimedia.org/wiki/File:Grus_americana_Sasata.jpg.
“Standing Up Man – Free People Icons.” Flaticon. Accessed September 15, 2015. www.flaticon.com/free-icon/standing-up-man-_10522.
“Tree Silhouette – Free Nature Icons.” Flaticon. Accessed September 15, 2015. www.flaticon.com/free-icon/tree-silhouette_46564.
“Turtle Shape – Free Animals Icons.” Flaticon. Accessed September 15, 2015. www.flaticon.com/free-icon/turtle-shape_47331.
Video Rating: / 5

Hank brings us to the next level of ecological study with ecosystem ecology, which looks at how energy, nutrients, and materials are getting shuffled around within an ecosystem (a collection of living and nonliving things interacting in a specific place), and which basically comes down to who is eating who.

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Table of Contents
1) Defining Ecosystems 0:49:1
2) Trophic Structure 4:44:1
a) Primary Producers 5:27
b) Primary Consumers 5:41
c) Secondary Consumers 5:49:1
d) Tertiary Consumers 5:58:2
e) Detrivores 6:08:1
3) Bioaccumulation 8:47

References and image licenses for this episode in the Google doc here: http://dft.ba/-3f2M Support CrashCourse on Subbable: http://subbable.com/crashcourse
Video Rating: / 5

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