B250 - 9 - Population Ecology
A group of individuals from the same species that live n the same area at the
same time - CORRECT ANSWER-What is a population?
the study of how and why the number of individuals in a population changes over
time - CORRECT ANSWER-What is population ecology
Birth
Death
Immigration
Emigration - CORRECT ANSWER-What are the four key factors that determine
the number of individuals in a population?
the study of factors that change population numbers; determine the size and
structure of a population through time - CORRECT ANSWER-What is
demography?
1. how many individuals of each age are alive?
2. how likely individuals of different ages are to survive to the following year?
3. how many offspring are produced by females of different ages?
4. How many individuals of different ages immigrate and emigrate each
generation? - CORRECT ANSWER-What are the four questions population
ecologists must ask themselves in their work?
the proportion of offspring produced that survive, on average, to a particular age -
CORRECT ANSWER-What is survivor ship?
1. starts off with high survivorship at a young age, then a severe drop in
survivorship at an older age
2. steady decline in survivorship over the years
3. low survivor ship at a young age then high survivorship after maturity -
CORRECT ANSWER-What are the three ways a survivorship plot may turn out?
the number of female offspring produced by each female in the population -
CORRECT ANSWER-What is fecundity?
, the average number of female offspring produced by a female in a given age
class. - CORRECT ANSWER-What is age-specific fecundity?
using data on survivor ship and fecundity - CORRECT ANSWER-How can we
calculate the growth rate of a population using a Life Table?
How the organism allocates its resources to growth, reproduction and activities
related
to survival.
A life history is the history of changes an organism undertakes throughout its life
- CORRECT ANSWER-Define what an organisms life history consists of:
Because every individual has a restricted amount of time and energy at its
disposal - its resources are limited. So choose the trait that would help them best,
even if it may have a trade-pff - CORRECT ANSWER-Why do fitness trade-offs
exist/occur?
a mother cannot survive as long and successfully reproduce and result with
successful kids.
She either devotes all her energy to her kids and maximize her reproductive
success, or all energy goes towards herself and results in high survivor ship but
low reproductive success. Mom needs a balance of the two, decent survivor ship
and decent reproductive success - CORRECT ANSWER-What is the correlation
with reproductive success and survivor ship?
growing quickly, reach sexual maturity at a young age, and produce many small
eggs or seed - CORRECT ANSWER-What is the future of organisms with high
fecundity?
grow slowly, and invest energy and time in traits that reduce damage from
enemies and increase their own ability to compete for resources - CORRECT
ANSWER-What is the future of organisms with high survivor ship
if environmental conditions change and will directly affect a populations growth
rate - CORRECT ANSWER-When would life history traits change?
A group of individuals from the same species that live n the same area at the
same time - CORRECT ANSWER-What is a population?
the study of how and why the number of individuals in a population changes over
time - CORRECT ANSWER-What is population ecology
Birth
Death
Immigration
Emigration - CORRECT ANSWER-What are the four key factors that determine
the number of individuals in a population?
the study of factors that change population numbers; determine the size and
structure of a population through time - CORRECT ANSWER-What is
demography?
1. how many individuals of each age are alive?
2. how likely individuals of different ages are to survive to the following year?
3. how many offspring are produced by females of different ages?
4. How many individuals of different ages immigrate and emigrate each
generation? - CORRECT ANSWER-What are the four questions population
ecologists must ask themselves in their work?
the proportion of offspring produced that survive, on average, to a particular age -
CORRECT ANSWER-What is survivor ship?
1. starts off with high survivorship at a young age, then a severe drop in
survivorship at an older age
2. steady decline in survivorship over the years
3. low survivor ship at a young age then high survivorship after maturity -
CORRECT ANSWER-What are the three ways a survivorship plot may turn out?
the number of female offspring produced by each female in the population -
CORRECT ANSWER-What is fecundity?
, the average number of female offspring produced by a female in a given age
class. - CORRECT ANSWER-What is age-specific fecundity?
using data on survivor ship and fecundity - CORRECT ANSWER-How can we
calculate the growth rate of a population using a Life Table?
How the organism allocates its resources to growth, reproduction and activities
related
to survival.
A life history is the history of changes an organism undertakes throughout its life
- CORRECT ANSWER-Define what an organisms life history consists of:
Because every individual has a restricted amount of time and energy at its
disposal - its resources are limited. So choose the trait that would help them best,
even if it may have a trade-pff - CORRECT ANSWER-Why do fitness trade-offs
exist/occur?
a mother cannot survive as long and successfully reproduce and result with
successful kids.
She either devotes all her energy to her kids and maximize her reproductive
success, or all energy goes towards herself and results in high survivor ship but
low reproductive success. Mom needs a balance of the two, decent survivor ship
and decent reproductive success - CORRECT ANSWER-What is the correlation
with reproductive success and survivor ship?
growing quickly, reach sexual maturity at a young age, and produce many small
eggs or seed - CORRECT ANSWER-What is the future of organisms with high
fecundity?
grow slowly, and invest energy and time in traits that reduce damage from
enemies and increase their own ability to compete for resources - CORRECT
ANSWER-What is the future of organisms with high survivor ship
if environmental conditions change and will directly affect a populations growth
rate - CORRECT ANSWER-When would life history traits change?
