To be classified as a
metapopulation, there must be an exchange of individuals among patches. TRUE
Identify the influence
that currents can have upon streams. Amount
of oxygen, shape of stream organisms, size of stream organism
What type of
information does a life table provide a population biologist? Survivorship and deaths
Survivorship curves are
plotted as the number of survivors per how many births? 1000
What benefits are
provided to human society by an understanding of population ecology? Prevention of species extinction; control
of pest species; maintenance of economically important plants
The age distribution of
a population can be used to determine the pattern
of survival
Identify the mechanisms
that can produce numerical responses in predators. Predator dispersal; an increase in prey population
Which type of
population densities are most impacted by dispersal? Local population
What features are
considered when studying population dynamics? Population abundance; population distribution
What substances are
used to measure the dispersal rate of plants? Pollen sediments
Which statement
correctly describes the mortality rate of various marine fish? The young have an extremely high rate of
mortality
Which survivorship curve
is characterized by a high survival rate among the young with a high mortality
rate among the old? Type 1
Which of the following
events occurs during the colonization cycle? Populations of organisms will disperse both upstream and downstream
Which statement
correctly describes the mortality rates of birds? All age groups die at an equal frequency
In what manner do
subpopulations maintain an exchange of individuals? Through immigration and emigration
What is the composition
of drift? Stream insects; fragments of
leaves; pieces of algae
Which feature is the
most important when one studies population dynamics? Population distribution
Which pieces of
information do life tables provide? Deaths
in the population; survivorship in the population
Studying patterns of
survival and reproduction in populations is associated with which type fo
population dynamics? Temporal
Which features are
leading to a decrease in the size of alpine meadows? Fire suppression; global warming
Which feature is
associated with the spatial dynamics of populations? The influence of dispersal on distribution
Identify the pieces of
information that are used to calculate the net reproductive rate for an annual
plant species. Survivorship curve; seed
production
Which feature in small
mammals is largely responsible for an increase in their density? Their reproductive rate
Which statement best
describes the pattern of mortality among large mammals? High mortality among the older individuals
Which statement best
describes a numerical response? Changes
in predator population density due to increased prey density
Which group of
organisms left a record of their dispersal in response to climate change? Maple
Which of the following
is an example of a cohort? 624 sunfish
born this spring
Which of the following
is not obtained from the information offered by the age distribution of a
population? The type of predators that
are causing a decline in the population
Obtained: period of
successful reproduction; whether the older individuals are replacing
themselves; period of high survival rates
Which predators were
associated with the Korpimaki and Norrdahl vole study? Short-eared owl; long-earned owls; European kestrel
Which species of bird
was not introduced into North America? Turkey
vultures
Introduced: European
starling; Eurasian collared doves; house sparrows
Which feature is found
in both the butterfly and kestrel population? They are both spatially organized into metapopulations
What does a negative
value for r indicate when calculating per capita rate of increase? The population is declining
According to the C.S.
Holling study, the numerical responses of the mice and shrews was due to what
factor? An increased reproductive rate
How is a fecundity
schedule tabulated? The tabulation of
the birth rates for all the females in a population
When did Africanized
honeybees first appear in the United States? 1990
What meadow size
resulted in greater than 100 butterflies in the population? Approximately a 40 ha meadow
What does Nt
represent in the formula used to calculate population size? The number of individuals in the population
at some time
Which information
represents the geometric rate of increase for a population? The ratio of the population size at two
points in time
According to numerical
responses what type of change should occur in the predator population if the
prey density increases? The predator
would change
Which age group,
typically, has the lowest mortality among large mammals? The youngest
Why would individuals
disperse from a population? The
population size has increased
Birthrate is measured
as the number of young born per female in a given period of time, TRUE
Which regions have the
Africanized honeybees been able to successfully colonize? North and South America
Which information is
used to determine a static life table? The
age of death of a large number of individuals
Which feature is unique
to the microorganisms living in a stream? Ability
to adhere to the surface of substrates
Which bird is the most
recently introduced species in North America? Eurasian collared doves
When tabulating a
fecundity schedule which parental demographic is studied? The adult females
How long ago did maple
reach the northern limit of its present day range? 6,000 years ago
Which statement about
the white oak population is the most accurate? This population is dominated by young trees and should persist for some
time
Which statement
describes why the cactus finch population of Genovesa Island was able to
increase? Wet weather resulted in
increased food production for the finches
What can be inferred
from a population in which the majority of individuals are concentrated in the
youngest age class? The population has a
Type III survivorship curve
Expanding populations
provide some of the best information about dispersal aspects of populations. TRUE
Which type of
population are butterflies more likely to leave? A small population
What happens to stream
organisms during a spate? They get
washed downstream
Which feature enables
fish to maintain their position in a stream? Streamlined to swim against the current
Why does P. smintheus
form metapopulations? They are tied to a
narrow range of host plants
Turtles average 1.2
nests per year and lay an average of 3.17 eggs. What is the average number of
eggs produced by nesting females per year? 3.8
eggs
What information is
gained by knowing the generation time of a population? The average age of reproduction
Which nest predator
most likely contributed to the greater aggressiveness of the Africanized
honeybees? Humans
What type of growth
potential could be expected from a population that has the majority of
individuals in the youngest age class? The
population level is growing
Which feature is unique
to the microorganisms living in a stream? Ability
to adhere to the surface of substrates
Which feature enables
fish to maintain their position in a stream? Streamlined to swim against the current
No comments:
Post a Comment