Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

APES U3 > Population Size > Flashcards

Population Size Flashcards

1
Q

What are density dependent factors

A

Size of population will influence an individual’s probability of survival

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

5 Examples of density dependent factors

A

Food, water, disease, habitat, or other limiting factors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is natality?

A

Birth rate AKA production of new individuals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is fecundity?

A

Physical ability to reproduce

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is fertility?

A

Measure of actual number of offspring produced (biotic potential)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is immigration?

A

Organisms introduced into new ecosystems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Other than immigration, how else can organisms be dispersed?

A

By wind or water currents over long distances or carried by animals or rafts of drifting vegetation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is biotic potential?

A

Max # of offspring a species can produce

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is mortality?

A

Death rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is survivorship?

A

Percentage of cohort surviving to a certain age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is life expectancy?

A

Probable number of yrs of survival for an individual of a given age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Does life expectancy increase?

A

Yes, as humans age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Do women live longer than men?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does emigration do?

A

Decrease population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is emigration?

A

Movement of members out of a population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What do many organisms possess that allow them to facilitate migration into new areas

A

specific mechanisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is population ecology

A

Study of factors that cause populations to increase or decrease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is carrying capacity?

A

Sustainable limit that an environment has in relation to the size of a species population

19
Q

What does overshoot mean?

A

Population exceeds carrying capacity of environment and death rates rise as resources become scarce

20
Q

Boom and bust meaning?

A

Population undergoes repeated cycles of overshooting followed by crashing

21
Q

What type of curve is a exponential growth graph?

A

J curve

22
Q

What type of curve is a logistic growth graph?

A

S curve

23
Q

What are density independent factors?

A

Size of population has no effect on individual’s probability of survival

24
Q

Example of density independent factors

A

Any climatic events, natural disasters

25
Q

What factors increase population size?

A

Immigration and births

26
Q

What factors decrease population size?

A

Emigration and deaths

27
Q

What is a population crash?

A

Growth becomes negative and the population decreases suddenly

28
Q

What is exponential growth?

A

Simple, idealized model

29
Q

What is logistic growth?

A

When a population whose growth is initially exponential, begins to slow as population approaches carrying capacity

30
Q

Which of the Exponential or Logistic growth graph is more accurate and complete?

A

Logistic growth graph

31
Q

What factor most affects the logistic growth model?

A

Density dependent factors

32
Q

Are there variations to the logistic model?

A

Yes

33
Q

What is the variation to the logistic model?

A

Overshoot and die-off

34
Q

What is population size?

A

Total number of individuals in a defined area at a given time

35
Q

What is population density?

A

Number of individuals per unit area or volume (aquatic) at a given time

36
Q

What is population density particularly useful for?

A

For wildlife management operators setting limits on hunting or fishing

37
Q

What is population distribution?

A

How individuals are distributed with respect one another

38
Q

What is population sex ratio?

A

Ratio of males to females and age structure

39
Q

What are the 3 types of population distribution?

A

Random, uniform, and clumped distributions

40
Q

What is random distribution?

A

No pattern to growth

41
Q

What is an example of random distribution?

A

Forests

42
Q

What are 2 examples of uniform distribution?

A

Plantations and territorial animals

43
Q

What are three examples of clumped distribution?

A

Schooling fish, herding animals, and flocking birds

APES U3 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions