# Powerpoint on Lynx & Hare lynx_hare_powerpoint

```Lynx &amp; Hare
Learning Objectives
1.Students will be able to calculate
population density.
2.Students will be able to graph the
size of a population over time.
3.Students will analyze the factors
(biotic and abiotic) influencing
population size and/or limiting
population growth.
4.Students will analyze a population
graph to identify areas of exponential
growth and/or carrying capacity.
Lynx
Arctic
Hare
Predator
&amp; Prey
Predator/Prey Relationship
What happens to a predator
population when the prey population
increases or decreases?
What happens to a prey population
when the predator population
increases or decreases?
1. Your goal is to model changes in Lynx &amp;
Hare populations
2. Mark off your square with tape (2’ x 2’).
3. Use the Lynx and Hare cards to model
how the numbers of individuals change
over time
Important Reminders
Take care of the materials in this lab
as several class periods will be using
them.
Do not misplace, throw-away,
crumple or otherwise destroy the oneinch snowshoe hares. Thanks for
Analysis: Population
Growth
Population Growth is affected by:
1. Births
2. Deaths
3. Number who leave or enter the
population
Real Lynx &amp; Hare Data
Question:
What was affecting the population
of the lynx and hare in the
activity?
Exponential
Growth
J-shaped growth
• In ideal conditions,
a population will
start growing
slowly, then
exponentially
• Example: in the
right conditions,
bacteria double
their population
each generation.
Limiting Factors
• Of course, organisms cannot grow
exponentially for long
• Factors that limit the growth of a
population are known as limiting
factors
• Example: predation of hares by
lynx limits the hare population
In the absence of lynx, what other
factors might influence the size of
the hare population? hare
population?
Factors can either be:
- biotic (living factor)
or
- abiotic (physical, non-living)e
population?
Classify each of the factors you
brainstormed as biotic or abiotic.
Carrying Capacity
 The maximum
population that can be
supported by an
environment
 The number is set by
the availability of space,
food, and other
resources necessary for
survival.
Carrying
Capacity
S-shaped growth
• As a result of
limiting factors,
population
growth slows, or
stops
• The result is a Sshaped curve
• The top of the
curve is K
(carrying
capacity)
Example of S-shaped curve
Question: what do you think
might happen if a population
exceeds the carrying capacity?
```