Unit 2.1

Question 1

What is population density?

Answer 1

The number of organisms in a given area that can affect the population due to competition for resources.

Question 2

What are some different methods to find population size/density?

Answer 2

Quadrats, Capture and Release, Indirect Counting, ect.

Question 3

What is the equation for population density?

Answer 3

Number of individuals/Area or volume occupied

Question 4

What are the three main population metrics?

Answer 4

Density, Distribution, Size

Question 5

What is population size?

Answer 5

The total number of individuals in one population

Question 6

What is population distribution?

Answer 6

The way individuals of the same population are spread out

Question 7

What is the difference between population density and distribution?

Answer 7

Distribution is the way organisms are spread out while density is the amount of that Organism in an area.

Question 8

What is population?

Answer 8

All of the organisms in the same place at the same time that can reproduce together.

Question 9

What distribution pattern is this: Resources are scarce and asa a result species are very territorial.

Answer 9

Uniform

Question 10

What distribution pattern is this: A certain fish species tends to gather in large groups to avoid being singled out and eaten by predators?

Answer 10

Clumped

Question 11

What distribution pattern is this: The seeds of a plant species are distributed by wind in a field where conditions are uniform?

Answer 11

Random

Question 12

What type of distribution would random sampling work best for?

Answer 12

Uniform

Question 13

What are the factors that affect population size?

Answer 13

Intrinsic, Biotic, and Abiotic factors.

Question 14

What are some abiotic factors that influence population size?

Answer 14

Soil/Nutrients, Sunlight and Temperature, Percipitation/Water

Question 15

What are some Biotic factors that influence population size?

Answer 15

Competitors, Predators, Parasites, Disease, Prey

Question 16

What is an intrinsic factor that influences population size?

Answer 16

Adaptations

Question 17

How do you do Indirect Counting?

Answer 17

Count number on individuals in a small area then increase that to find larger scales

Question 18

How do you do direct counting?

Answer 18

Count every individual

Question 19

What is the formula for random sampling?

Answer 19

of organisms in sample divided by the area of sample = total # of organisms divided by the total area

Question 20

What is the formula for mark and recapture?

Answer 20

Total marked organisms divided by total # of organisms = total # of organisms recaptured divided by # of recaptured organisms.

Question 21

One night, you trap 40 mice, mark them, and let them go. Two nights later, you again trap 40 mice, and 12 of them are marked. What is the total number of mice in the meadow?

Answer 21

133

Question 22

• • 3 - 10
    4 - - - -
• 4 - - -
• • • • 7
        Each space is 5x5. If the field is 625 m2 in area, what is the estimated size of the population?

Answer 22

140

Question 23

What would the equation for this problem be?

One night, you trap 40 mice, mark them, and let them go. Two nights later, you again trap 40 mice, and 12 of them are marked. What is the total number of mice in the meadow?

Answer 23

40/x = 12/40

Question 24

Since wolves hunt better in packs to kill prey, what kind of distribution do you think they have?

Answer 24

Clumped