Download File - Mo`Hearn Biology

Warm Up on pg 13
Biotic means living and Abiotic means non-living
1) Make a list of BIOTIC LIMITING FACTORS
2) Make a list of ABIOTIC LIMITING FACTORS
TURN IN PIGS
What is the effect of competition on
a population?
-Positive
-Neutral
-Negative
Virtual Lab—L15
The two species look different. How?
Count them separately for test tube 3 or you will
have to redo!
To get into lab…
• Type…Virtual Lab Population Biology
• READ on the left, DO on the right
• Fill in table and then show GRAPH
• One person is the writer and one is the computer person. BOTH people will have to
answer questions
• GOAL—To show how competition affect’s population size. Your
group has to show me a computer graph AND what this says
about competition
How to interpret what a population is doing
by looking at a graph
1. Start by looking at axis and title
2. Look at beginning, middle, end
3. Any patterns?
If the population is FLAT=hit carrying capacity.
If looks like a J=exponential
4. Draw conclusions about population
Example 1
1. What is the carrying
capacity of the
cockroach population?
2. At what day did the
cockroach population
meet the carrying
capacity?
Example 2—Carrying Capacity
Graph 3—Exponential +
Population Crash
What is happening between
1944-1960?
What do you think happened in
1963?
Graph 4
Your turn—Look at 4 graph interpretations
answer all questions
Page 11—Graphs 1 + 2
Page 12—Graphs 3 + 4
Graph 1 - Exponential Growth and Carrying Capacity
1. Which of the two curves exhibits exponential growth? A
2. Which of the two curves exhibits a carrying capacity? B
3. What is the carrying capacity of this graph? 1,000
4. In what generation does this population
reach its carrying capacity? Generation 24
Graph 2
1.For what type of organism is the carrying capacity shown? White-tailed Deer
2.Give one possible reason why the population decreased in 1990 after it had reached its
carrying capacity. Limiting factors such as space, grass, predators
3. Give one hypothesis to explain why the population exceeded its carrying capacity in
1992. Not that many limiting factors. Maybe there were low number of predators
4. Why did the population decrease in 1994 after it exceeded the carrying capacity?
Limiting factors such as space, grass, predators
Graph 3 - Competition Curve
This graph shows the growth of 2 species of bacteria grown on the same petri dish. It also shows their growth rate when grown separately.
1. Which of the 2 types of bacteria will soon die? Why? P. caudatem. It cannot
compete with P. aurelia
2. 2. Which of the 2 bacteria strains is better adapted for competition? P. aurelia
3. How is the growth rate for P. caudatum different when it is grown alone? It can
reach its reproductive potential when P. Aurelia is not present
4. What happens to the growth rate of P. aurelia around day 12? Hit its carrying
capacity
Graph 4 – Predator-Prey Graph
Isle Royale National Park on a remote island was established in 1940, and designated a wilderness area in 1976. The only mode of transportation available is by boat or seaplane. Moose first arrive
1.What is the greatest moose population? What year did that occur? 2500 in 1980
2.What was the wolf population when the moose population the greatest? 900
3.What would happen to the wolf population if the moose population decreases? The wolves would
also decrease since they have no food
4.What would happen to the moose population if the wolves were removed from Isle Royale? They would increase
exponentially but then hit carrying capacity
5. Describe the pattern between the wolf (predator) population in relation to the moose (prey) population.
One goes up,
the other goes down
5. Identify a factor, other than moose population, that has influenced the wolf population in Isle Royale.
From the
reading, disease has affected the wolves
6. Identify two factors, other than the wolf population, that may influence the moose population.
space
Their food, disease,
Warm Up pg 14
• What was the effect of competition on the population of P.Aurelia
and P. Caudiam?
• Make a prediction about what other interactions species can have.
•Glue Virtual Lab pg 15-16
Fill in last box with 3-4 sentences and ALL voc
words
Copy and fill in
Part A top of pg 17
Parasitism—
One species is hurt, one species benefits
parasite
bird
Predation
One species is hurt, one species benefits
bear
fish
Competition
Both are hurt
deer 1
deer 2
Mutalism
Both benefit from the relationship (+, +)
The ants defend
the tree against
herbivores, both
large and
small.They attack
insects and large
grazing herbivores.
The tree gives the
ants a home
Ants
Tree
Commensalism
One benefits, one is neither harmed or benefited
barnacle
whale
To do: Species interaction worksheet Part B
bottom of pg 17
Splat game
• Each team will get a splatter to be used on the board
and not each other!!
• Each member sends to the line by the board
• I will put up a question and you need to “splat” the
correct answer. First team—2 pts. All others---1 pt
Population Video—Take notes pg 18
• https://www.youtube.com/watch?v=KFViSog6ZJw
Quick Check: Exit Quiz
•Take out a pieceof paper
•Put your full name and period at
the top
Question 1
The maximum number of individuals that an ecosystem
can support is called its _________________
A. reproductive potential
B. limiting factor
C. carrying capacity
D. population growth
Write letter and correct term
Question 2
In the Lily Pad simulation, your lily pads
could NOT reach their reproductive
potential. Name two limiting factors that
might have restricted their population
growth.
Question 3
All are BIOTIC limiting factors EXCEPT:
A. Food
B. Space
C. Predators
D. Disease
Question 4
The virtual lab showed that:
A. Competition helped both species
B. Competition hurt both species
C. Competition did nothing for both species
Question 5
Letter B represents the
population’s _____________________.
Turn in quiz and work on….
•Lynx, hare and virus
•READ, READ, DO!!
Pg 19
• Pg 19-20 Lynx and Hare directions and graph
Page 21 Write about what happened to
the hare population over time? Use
vocabulary words