Distribution and Abundance
What is fundamental niche?
Data collected from a group of individuals born at the same time and are followed throughout their lives.
What is a cohort life table?
Low mortality rate for most of life followed by mortality near end of life.
What is Type 1 mortality rate?
Population increases and decreases from these respective factors
What are births+immigration and deaths+emigration?
Actual environment where set of resources used by a species interacts with biotic factors like competition.
What is a static life table?
What is net reproductive rate (Ro)?
Ro = sum of l(x)*b(x)
Individuals are added to a population continuously.
Ex: bacteria
What is an exponential growth?
Unequal distribution of individuals to a common resource or mutual attraction between individuals.
What is clumped distribution?
How do you obtain l(x)?
What is l(x) = n(x)/n(0)?
Example of this is in lecture 10 part 2
Individuals replace themselves, Implies population is increasing, Implies population is decreasing
What is:
Ro = 1
Ro > 1
Ro < 1
Young individuals are added to the population at discrete intervals
ex: seasonal reproducers
What is geometric growth?
Theory in which endotherms in cold climates have shorter extremities than those in warm climates.
What is Allen's rule?
What is how many died during year (x) and d(x) = n(x) - n(x + 1)?
Example is in lecture 10 part 2
How long between birth of parents and birth of offspring from a population. Provide the equation.
What is cohort generation time (Tc)?
Tc = (Sum of x*l(x)*m(x))/Ro
Equation estimates a future population of an exponentially growing population.
What is Nt = Noe^rt?
Nt = number of individuals after t time units, No = initial population size, r = exponential growth rate, e = base of natural log
Rarity where the species has a restricted range, narrow habitat, and small population.
(Hint: Mountain gorillas)
What is Class III rarity?
What does q(x) signify and provide the equation.
What is the rate at which they died from (x) to (x + 1) and q(x) = d(x)/n(x)?
Example is in lecture 10 part 2
The exponential rate of increase assumed by a population with a stable age distribution. Provide the equation.
What is r or intrinsic rate of increase?
r = ln(Ro)/Tc
Equation used to estimate a future (t) population size of an geometrically growing population.
What is Nt = Noλ^t?
Nt = number of individuals after t time units, No = initial population size, λ = ratio of change in population size between time periods