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ENR 3300 Exam 2 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Population - Answer✔groups of organisms of the SAME species living in the same area at the
same time
community - Answer✔multiple DIFFERENT species in one location
population abundance (N) - Answer✔number of individuals in the population
population density (N/m^2) - Answer✔how many individuals are in a particular area
population dynamics / growth rate (dN/dt) - Answer✔how the size of the population is
changing over time
vital rates - Answer✔processes that determine the dynamics of a population
examples of vital rates - Answer✔- birth rates (b)
- death rates (d)
- immigration
- emigration
recruitment rates - Answer✔- fish
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- similar to birth rates
- number of fish that are entering fishery
- number of fish that are reproductively mature
population size (N) = - Answer✔- births plus deaths
-N=b+d
how do populations grow? - Answer✔exponential
a population that grows exponentially... - Answer✔- adds increasingly more individuals as N
(population abundance) increases
- does not require increases in the intrinsic rate of natural increases (r)
dN/dt = rN
active management - Answer✔removing individuals from a population
management challenges of bison in yellowstone national park - Answer✔- Bison leaving the
park. Some have disease (Brucellosis) that can be transmitted to livestock. Creates problems for
humans - increased human/wildlife conflict
(Car crashes)
approaches being used to manage bison - Answer✔- active removal (culling)
- outreach/education with surrounding states. working together to find a management solution
density dependent factors
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(regulates the growth of a population) - Answer✔- factors whose influence is dependent on the
size of the population and regulates growth by changes in reproduction and survival
- ex: the effect of competition for resources, predation & rates of infection can all increase with
population density
density independent factors - Answer✔- factors that affect a population irrespective of the
density of that population
- ex: pollution, weather extremes, natural disasters
carrying capacity (K) - Answer✔number of individuals the environment can support indefinitely
logistic growth - Answer✔- most relevant basic growth model for understanding approaches to
harvest
- occurs when the growth rate decreases as the population reaches carrying capacity
- parabola
in fish and wildlife management, what is the level that we usually manage? -
Answer✔population
in forestry, what is the level that we usually manage - Answer✔community (many species)
population growth of trees - Answer✔- logistic
- individual trees grow in response to the trees around them
what is going on for individual trees as total biomass increases? - Answer✔over time, there are
fewer trees per acres, but they are larger
size distribution of trees - Answer✔a lot of small trees, few large
3|P a g e
ENR 3300 Exam 2 Questions And Answers
|Latest 2025 | Guaranteed Pass.
Population - Answer✔groups of organisms of the SAME species living in the same area at the
same time
community - Answer✔multiple DIFFERENT species in one location
population abundance (N) - Answer✔number of individuals in the population
population density (N/m^2) - Answer✔how many individuals are in a particular area
population dynamics / growth rate (dN/dt) - Answer✔how the size of the population is
changing over time
vital rates - Answer✔processes that determine the dynamics of a population
examples of vital rates - Answer✔- birth rates (b)
- death rates (d)
- immigration
- emigration
recruitment rates - Answer✔- fish
1|P a g e
, ©BRIGHTSTARS 2025 ALL RIGHTS RESERVED 1:26 PM A+
- similar to birth rates
- number of fish that are entering fishery
- number of fish that are reproductively mature
population size (N) = - Answer✔- births plus deaths
-N=b+d
how do populations grow? - Answer✔exponential
a population that grows exponentially... - Answer✔- adds increasingly more individuals as N
(population abundance) increases
- does not require increases in the intrinsic rate of natural increases (r)
dN/dt = rN
active management - Answer✔removing individuals from a population
management challenges of bison in yellowstone national park - Answer✔- Bison leaving the
park. Some have disease (Brucellosis) that can be transmitted to livestock. Creates problems for
humans - increased human/wildlife conflict
(Car crashes)
approaches being used to manage bison - Answer✔- active removal (culling)
- outreach/education with surrounding states. working together to find a management solution
density dependent factors
2|P a g e
, ©BRIGHTSTARS 2025 ALL RIGHTS RESERVED 1:26 PM A+
(regulates the growth of a population) - Answer✔- factors whose influence is dependent on the
size of the population and regulates growth by changes in reproduction and survival
- ex: the effect of competition for resources, predation & rates of infection can all increase with
population density
density independent factors - Answer✔- factors that affect a population irrespective of the
density of that population
- ex: pollution, weather extremes, natural disasters
carrying capacity (K) - Answer✔number of individuals the environment can support indefinitely
logistic growth - Answer✔- most relevant basic growth model for understanding approaches to
harvest
- occurs when the growth rate decreases as the population reaches carrying capacity
- parabola
in fish and wildlife management, what is the level that we usually manage? -
Answer✔population
in forestry, what is the level that we usually manage - Answer✔community (many species)
population growth of trees - Answer✔- logistic
- individual trees grow in response to the trees around them
what is going on for individual trees as total biomass increases? - Answer✔over time, there are
fewer trees per acres, but they are larger
size distribution of trees - Answer✔a lot of small trees, few large
3|P a g e
