Isle Royale Ready
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Transcript of Isle Royale Ready
![Page 1: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/1.jpg)
Bonus QUIZ!!!!!!
![Page 2: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/2.jpg)
Isle RoyaleWolves vs Moose
![Page 3: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/3.jpg)
Objectives
These objectives will be accomplished via a computer simulation of Isle Royale:
• Understand various population ecology terms
– Exponential growth, logistic growth, carrying capacity, and limiting
factors
• Take a real life uninhabited ecological system and learn about
various aspects of population ecology
• Observe how variation in climate effects
– Population size and predator-prey relationships
![Page 4: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/4.jpg)
Isle Royale Location
![Page 5: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/5.jpg)
Isle Royale Background
• In 1900 pioneer moose swam across the open ocean to the uninhabited island
• The moose entered paradise– No predators and full of grass, shrubs, and trees to
eat
• Moose population explosion (30 yrs.)– Several thousands at its peak
• Something disrupted their paradise!!!!!!
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Wolves Introduction• Lake Superior frozen in 1940 allowing an ice
bridge to form
• Small pack of wolves found the bridge and crossed to the island
• Wolves paradise began– Huge population of weak moose because of lack
of food
![Page 7: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/7.jpg)
Natural Experiment
• Moose and Wolves have been studied since 1958– Longest running experiment of its kind
• Isolation of the island provides good condition to study predator-prey system– Large enough to support wolf pop, small enough
to keep track of wolves and moose pop annually
![Page 8: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/8.jpg)
Important Population Ecology Terms
• Population ecology is the study of changes in size and composition of a population and the factors that cause it
• Two types of Population Growth Models:– Exponential and Logistical– Useful in helping to understand complexity of pop
growth and predict how pops will change through time
![Page 9: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/9.jpg)
Exponential Growth Model
• No limitations to pop growth– All resources for survival
and reproduction are present
• Larger pop=faster growth– Each successive
generation produce more individuals which cause more and more offspring
dNdt
=rmax N
•rmax represents maximum per capita rate of growth=intrinsic rate of increase
•N=pop size
•t=time
![Page 10: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/10.jpg)
Logistic Growth Model
• Real world model– Limited by availability of
important resources
• Carrying capacity (K)– The max # of species that the
local environment can support at any particular time
– Starts off exponential when the pop is small
– Begins to level off when the resources start to get used up and pop gets large
dNdt
=rmax N (K-N)K
r= per capita growth rateas density
N=K when carrying capacity is reached
![Page 11: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/11.jpg)
Computer Simulation
Part A. The Moose Arrive
Part B. The Wolves Arrive
Part C. Changes in the Weather
![Page 12: Isle Royale Ready](https://reader035.fdocuments.in/reader035/viewer/2022062219/553df83e5503468c338b4845/html5/thumbnails/12.jpg)
Wrap up
• Discuss Presentation with Group Members• Next week:– Quiz 5• Invasive Species and Biological Control (Lab 6) and Isle
Royale(Lab 8)
– PRESENTATIONS!!!!!• Come prepared!!!