Transcript Predator Prey Lab Ppt

DO NOW:
The absence of the wolves in Yellowstone National
Park severely impacted the ecosystem. Many
changes occurred from the loss of this predator.
The wolves are considered a keystone species.
How would you define a keystone species?
Keystone species is a species that has a disproportionally large effect on its environment
Compared to its relative abundance. When a keystone species is removed from a system,
The ecosystem may change drastically, even if the species removed was a small part of the
Ecosystem.
PREDATOR-PREY SIMULATION LAB:
A CLOSE LOOK AT THE RELATIONSHIP
BETWEEN PREDATOR AND PREY
1 . S I M U L AT E T H E I N T E R A C T I O N S
B E T W E E N A P R E D AT O R P O P U L AT I O N
O F F O X E S A N D A P R E Y P O P U L AT I O N
OF RABBITS
2 . O R GA N I Z E DATA I N TA B L E A N D G R A P H
F O R M AT
3 . C O M PA R E S I M U L AT I O N D ATA T O D ATA
TA K E N
F R O M N AT U R E , A N D R E F L E C T
U P O N L A B P R O C E D U R E A N D N AT U R E
MEET THE INDIVIDUALS OF EACH POPULATION
Predator – Fox
Prey – Rabbit
Habitat - Meadow
QUESTIONS TO PONDER DURING THE LAB…
1. What effect does the available food source
have on population?
2. What influence will the prey population have
on the predator population? Vice versa?
3. Can you see a pattern occurring between the
predator and prey population?
Do the lab….
ABOUT THE….
FOX
Must capture 3 rabbits
to survive
Produce 1 offspring
for every three
rabbits capture
A fox only immigrates if
none left in meadow
RABBIT
Captured ones die
Surviving ones
reproduce and
double
Meadow carrying
capacity is 100
IMPORTANT
NOTES
Determine fox survival and reproduction
using individual fox capture numbers.
• As population builds, it is
important to tally each fox’s
kills, removing captured
rabbits after each fox is
tossed.
• If fox captures 7 rabbits,
three foxes enter next
generation, original fox and
two offspring for that one
fox.
FINISHING THE SIMULATION
1. Continue following the lab procedure and complete the number of generations as
set by your teacher.
2. Each group must submit the data tables to me with each person’s first and last
name on it. Also, indicate the period to which you belong. Place in wire basket.
3. Now split your group into two groups of two. If you are a group of three, remain a
group of three. Obtain an index cared. On the top line of the index card, write the
your name and your partner’s name (first and last name). Give the card to your
teacher.
4. Begin assigned work.
Homework: Be sure to know your password to log into a
chrome book tomorrow.
1. Create a line graph showing the two populations over time.
2. Answer questions about the data
3. Drop the Google Sheet with graph and the Google Doc
with answers to question in Honors Biology folder.
4. Be sure graph and doc are shared with all members
PREDATOR-PREY RELATIONSHIP IN NATURE
Oscillation Traits:
Repetitive variation
Relating to time
Regular intervals
Oscillating growth can describe predator-prey relationship.
Each population has this pattern.
2. Refer to the Predator-Prey Simulation Line Graph to answer the following:
a. Describe what happens to the rabbit population over time.
b. Describe what happens to the fox population over time.
c. How did both of these populations influence each other?
d. What would have happened if a whole family of foxes immigrated into the ecosystem at
Generation 2?
e. Make a prediction about what would happen to both your predator and prey populations if a
new predator is added to the system? Explain any new types of relationships established.
3. Refer to the Predator-Prey Line Graph of Nature to answer the following:
a. How does the predator population vary when they prey numbers change?
b. Are the populations in phase with each other for most of the time? Explain.
4. Refer to both Predator-Prey Line Graphs to answer the following:
a. Which graph best illustrates a predator-prey relationship that is least influenced by other factors in
the ecosystem? Support your answer.
b. Explain how the simulation models a real ecosystem. Explain how you could change the lab
procedure to make it more realistic.
Isle Royale National Park...
Wolves and Moose of Isle Royale National Park
Wolves Attacking a Moose
LISTEN AND WRITE DOWN FACTS…
1. How the wolves gets to Isle Royale…
2. What decrease moose population? Specific biotic or abiotic factor…
3. Any biotic or abiotic factors that affects moose, wolves…
4. Describe abiotic factors which influence the community…
A BIT OF INFO ABOUT THE WOLVES AND THE MOOSE
For over 50 years researchers from Michigan
Technological University have been studying the
relationship between wolves and moose on Isle Royale,
located in the middle of Lake Superior. This long term
study continues to surprise us with new discoveries on
how the natural world works. Hear the latest news from
Assistant Professor John Vucetich, and learn more about
why the fate of Isle Royale wolves may be in jeopardy.
Wolf-Moose Relations Study
The Wolves and Moose of Royale Island
CAN YOU PLACE THESE WORDS ON THE GRAPH?
EXPLANATION MUST REFERENCE BOTH POPULATIONS.
1. Density-Dependent Effect
2. Density-Independent
Effect
3. Exponential growth
4. Intraspecific competition
5. Predation
6. Interspecific Competition
Answer should contain years
and a specific reason! Use the rubric!
1. Reread the background
info on the lab
2. Review the data table
and the line graph
3. Review questions and
discussion notes
4. Review power point
5. Practice reading graphs