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 What is the effect of competition on a population? -Positive -Neutral -Negative

Virtual Lab—L15

The two species look different. How 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 Start by looking at axis and title Look at beginning, middle, end 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

Which of the two curves exhibits exponential growth? A Graph 1 - Exponential Growth and Carrying Capacity 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 For what type of organism is the carrying capacity shown? White-tailed Deer 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. Which of the 2 types of bacteria will soon die? Why? P. caudatem. It cannot compete with P. aurelia 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 arrived at Isle Royale around 1900. The moose population tends to increase in years with mild winters, early spring green-up, abundant winter forage, low wolf numbers and low levels of tick infestation. Wolves first arrived at the island on an ice bridge from Canada in 1940. Disease has also influenced the wolf population. Between 1980 and 1982, the wolf population declined from 50 to 14, due to canine parvovirus. What is the greatest moose population? What year did that occur? 2500 in 1980 What was the wolf population when the moose population the greatest? 900 What would happen to the wolf population if the moose population decreases? The wolves would also decrease since they have no food 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. Their food, disease, space

Warm Up pg 14 Glue Virtual Lab pg 15-16 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: Competition helped both species Competition hurt both species 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