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UNCG - BIO 301 - Class Notes - Week 5

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UNCG - BIO 301 - Class Notes - Week 5

School: University of North Carolina - Greensboro
Department: Biology
Course: Principles of Ecology
Professor: Robert Stavn
Term: Fall 2016
Tags: Introduction and Ecology
Name: Population Regulation
Description: These are the class notes for "Population Regulation"
Uploaded: 10/04/2016
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background image Population Regulation Competition ­ lack, MacArthur (density dependence)
Insects ­ plagues ­ correlated rainfall (density independence) 
Density Dependent + Independence­ Lord Robert May (“ Chaos Theory”)
dN/dt= rN(1­N/K)  Lack­ birds const. 
Density Independence:  Australia ­ locusts, apple thrip
Rose garden
Locust - 1940 → dry year → 2 or 3 wet years
Outbreaks of vertebrates
Snowy owl  → might head south in northern europe
Crossbill (forest)  Differential equations:
Prey: dN
1 /dt = r 1 N ­ δN 1 N 2    (N 1 ­ prey species; N 2 ­ predator species) Predator:  δ N 1 N  ­ d N 2          (d ­ death rate;   N ­ size of predator; δ  ­ the interaction of the  predator and prey ) Didinium ­ predator eats
Paramecium ­ “Herbivore” eats bacteria 
Biological control
California Citrus scale
orange miles 129 Lady birds predator mite Cactus­ cactus moth
Low number­ scale ­ refuge
Prickly Pear Cactus (arizona)
→ planted in yards/ decorative plant
→ arizona moth 
Increase prey diversity  Green Earth Hypothesis ­ HSS “ Three authors” (“Why is the earth green?”)  [herbivore ­ carnivore interaction]  Plants not defoliated / defence mechanisms ­ resource, competitive (nicotine, LSD)
Herbivore ­ predators limited

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Join more than 18,000+ college students at University of North Carolina - Greensboro who use StudySoup to get ahead
School: University of North Carolina - Greensboro
Department: Biology
Course: Principles of Ecology
Professor: Robert Stavn
Term: Fall 2016
Tags: Introduction and Ecology
Name: Population Regulation
Description: These are the class notes for "Population Regulation"
Uploaded: 10/04/2016
2 Pages 33 Views 26 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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