Population Growth and Density Dependence

Question 1

Recognized that the tremendous capacity for
population increase could not be maintained in an
environment with limited resources

Answer 1

THOMAS MALTHUS

Question 2

He argued that populations inevitably expand until they
outgrow their available food supply, causing the population growth to be reversed by disease, famine, war, or calamity.

Answer 2

THOMAS MALTHUS

Question 3

He is also known for developing an exponential formula used to forecast population growth, which is currently known as the Malthusian growth model.

Answer 3

THOMAS MALTHUS

Question 4

Malthus argued that populations inevitably expand until they
____________, causing the population
growth to be reversed by disease, famine, war, or calamity.

Answer 4

Outgrow their available food supply

Question 5

He was
influenced by the English clergyman Thomas Malthus, who published his book in 1798 stating that populations with
abundant natural resources grow very rapidly. However, they limit further growth by depleting their resources.

Answer 5

CHARLES DARWIN

Question 6

Developed the theory of natural selection.

Answer 6

Charles Darwin

Question 7

It states that individuals will compete, with
members of their own or other species, for limited resources.

Answer 7

“Struggle for existence”

Question 8

The successful ones are more likely to survive and pass on the
traits that made them successful to the next generation at a
greater rate.

Answer 8

Natural Selection

Question 9

He said that “Population growth underlies most ecological problems of
interest, such as the dynamics of diseases, competition, and the
structure and dynamics of communities.”

Answer 9

WILLIAM MURDOCH

Question 10

Is essential to long-term species persistence and is still the
central dynamical question in ecology.

Answer 10

Population regulation

Question 11

This formula allows us to determine the rate of population change
with respect to certain variables - including population size, births, deaths, per
capita growth rate, and carrying capacity.

Answer 11

Population growth

Question 12

Population Growth formula

Answer 12

dN/dt = B - D

Question 13

Exponential Growth formula

Answer 13

dN/dt = rmax N

Question 14

Logistic Growth

Answer 14

dN/dt = rmax N (K-N/K)

Question 15

One way to determine how much a population size has
changed is to subtract the number of deaths from births if the data is given

Answer 15

POPULATION GROWTH

Question 16

In this growth, the population grows as if there are unlimited
resources.

Answer 16

EXPONENTIAL POPULATION GROWTH

Question 17

A population growth that levels off as population size
approaches carrying capacity, K.

Answer 17

LOGISTIC POPULATION GROWTH

Question 18

Maximum population size that can be supported by the available resources in an
environment.

Answer 18

Carrying capacity (K)

Question 19

A more realistic representation of how populations
grow.

Answer 19

Logistic growth model

Question 20

Limiting factors that include temperature, sunlight, water and pH.

Answer 20

ABIOTIC

Question 21

Limiting factors that include competition for resources,
predation, diseases

Answer 21

BIOTIC

Question 22

Limiting factors that are not influenced by population size or density.

Answer 22

Density-independent factors

Question 23

These factors can affect populations regardless of their size or density.

Answer 23

Density-independent factors

Question 24

Limiting factors that are influenced by the size or density of a population.

Answer 24

Density-dependent factors

Question 25

As the population size increases, these factors become more important and can limit population growth.

Answer 25

Density-dependent factors

Question 26

Happens when the rate of population growth decreases as population density increases.

Answer 26

Negative density dependence

Question 27

Occurs when the population growth rate increases as population density decreases.

Answer 27

Positive density dependence

Question 28

Is the struggle between two organisms for the same resources within an environment.

Answer 28

Ecological competition

Question 29

is the competition for limited resources between individuals of the same species.

Answer 29

Intraspecific competition

Question 30

is the competition for limited resources between individuals of different species

Answer 30

Interspecific competition

Question 31

These are the Density-dependent factors:

Answer 31

*Competition *Predation * DISEASES

Question 32

involves the threatening of a prey population by a predator, keeping their numbers low

Answer 32

Predation

Question 33

are considered density-dependent limiting factors because as population density increases, they are able to spread more easily within the population, eventually leading to a decrease in population growth.

Answer 33

Diseases and parasitism

Question 34

a highly contagious viral disease that affects both domestic pigs and wild boars.

Answer 34

African Swine Fever (ASF)

Question 35

Similarities of exponential growth and logistic growth

Answer 35

*Both describe the growth of a population. *Both depend on the size of the population.

Question 36

Differences of exponential growth and logistic growth

Answer 36

*EG refers to a growth whose rate is proportional to the size of the population over a specific period of time. *LG refers to a population growth whose rate decreases with the increasing number of individuals and it becomes zero when the population becomes its maximum

Question 37

refers to a growth whose rate is proportional to the size of the population over a specific period of time.

Answer 37

Exponential growth of a population

Question 38

Refers to a population growth whose rate decreases with the increasing number of individuals and it becomes zero when the population becomes its maximum.

Answer 38

Logistic growth

Question 39

The growth curve of the exponential growth

Answer 39

J-shaped

Question 40

The growth curve of the logistic growth

Answer 40

Sigmoid

Question 41

In population status, The population crash occurs due to the mass mortality

Answer 41

Exponential Growth

Question 42

In population status, The population crash occurs very rarely during the logistic growth.

Answer 42

Logistic Growth

Question 43

It lacks any upper limit

Answer 43

Exponential Growth

Question 44

consists of an upper limit called the carrying capacity

Answer 44

Logistic Growth

Question 45

does not frequently reach a stationary phase

Answer 45

Exponential Growth

Question 46

It reaches a stationary phase

Answer 46

Logistic Growth

Question 47

occurs when the resources are plentiful

Answer 47

Exponential Growth

Question 48

occurs when the resources are limited.

Answer 48

Logistic Growth

Question 49

depends on the size of the population

Answer 49

Exponential Growth

Question 50

depends on the size of the population, competition and the amount of resources

Answer 50

Logistic Growth