A reproductive strategy in which the organism
produces all their offspring in a single reproductive event is called semelparity.
Which of the following statements about continuous
iteroparity are correct?
·
Individuals reproduce repeatedly and at
any time of the year
·
Populations do not have distinct
generations
Correctly pair each type of survivorship curve with
its characteristics.
·
Type 1: most individuals die late in
life
·
Type 2: uniform rate of decline
·
Type 3: huge decline in young
Rank the following components of land use in
developed countries from the largest at the top to the smallest at the bottom.
1. Energy
2. Food
3. Forestry
When individuals are arbitrarily spaced within a
population, the dispersion pattern is said to be random.
Which of the following accurately describe the
following features of K-selected species?
·
Lifespan: long
·
Mortality rate: usually low
·
Size of offspring: large
Which of the following organisms would display a
type 1 survivorship curve?
·
Elephants
·
Polar bears
A population with a per capita growth declining to
zero would begin to approach its carrying capacity.
The mean period between birth of females and birth
of their offspring is called the generation time.
Which of the following organisms would likely
display a type 2 survivorship curve? Reptiles and birds
Match the survivorship curve to its description.
·
Type 1: parents have few young and
invest much time and resources into raising their young
·
Type 2: parents have several young over
their lifetime investing a small amount of time into raising their young
·
Type 3: parents have large numbers of
offspring per event and invest little to no time in their young
A line transect is a sampling
technique in which a string is stretched along the ground in a straight line
between two poles and any organism along its length is counted.
Which of the following accurately defines
density-independent mortality factors? Factors for which mortality remains
unchanged in response to population density.
Select all traits that ecologist would incorporate
into a life history strategy.
·
Speed of maturation
·
Competitive ability
·
Dispersal ability
·
Length of life
Which of the following would be most likely method
used by ecologists to determine density of clonal individuals? Estimating the
amount of ground covered by clonal plants
Emigration
is the movement of individuals out a specific area.
Density-independent factors include which of the
following?
·
Fire
·
Hard freeze
Match the description of type of country to its
replacement rate.
·
Developing country: replacement rate is
between 2.5 and 3.3
·
Developed country: replacement rate is
2.1
Population
ecology is the study of factors affecting population size and how these
factors change over space and time.
When a population’s size does not change over time,
the population is exhibiting zero population growth.
A quadrat is a square frame used to outline
an area for population density estimates.
Select all of the following factors that are
density-dependent factors.
·
Competition
·
Parasitism
·
Predation
The rate of offspring production for females of a
certain age is called the age-specific fertility rate.
The shift in birth and death rates accompanying
development is called demographic transition.
The population growth rate per generation is called
the net reproduction rate.
Inverse density-dependent factors are mortality
factors that decrease mortality as population growth increase.
The mark-recapture technique is a
sampling method in which animals are captures, tagged, released, and recaptured
to estimate population density.
The movement of individuals into an area is called
immigration.
Rapid population growth occurring when per capita
growth rate remains above zero is called exponential growth.
The age-specific fertility rate is the
rate if offspring production for females of a certain age, whereas the net
reproductive rate is the average number of offspring born to all females
of all ages.
Logistic
growth occurs when population growth slows down as K is approached, whereas exponential
growth occurs when population growth increases by some constant factor.
Organisms that grow in patches of genetically
identical individuals are called clonal.
The average number of live births a woman has in her
lifetime is called the total fertility rate
Population density is the number of organisms in a
given unit area or volume.
Match the method used by ecologists to the type of
data collected.
·
Population growth: field census
·
Carrying capacity: data collection of
resource availability
·
Population growth rate: census of births
and deaths per unit of time
Correctly pair the species with the sampling method
used to determine population density.
·
Suction traps: flying insects
·
Pitfall traps: small lizards
·
Sweep nets: caterpillars
·
Mist nets: birds
·
Live traps: mice
Dispersion refers to the spatial distribution of
organisms within a population.
A population’s growth would be limited as the
density of that population increases because of density-dependent factors.
A group of organisms of the same age is called a
cohort.
The rate of offspring production for females of a
certain age is called the age-specific fertility rate.
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