Population Growth Flashcards
Exponential growth
instantaneous rate of population growth, expressed as proportional increase per unit of time
logistic growth
mathematical expression for the population growth curve in which rate of increase decreases linearly as population size increases
intrinsic rate of increase
the per capita rate of growth of a population that has reached a stable age distribution and is free of competition and other growth restraints
carrying capacity
number of individual organisms the resources of a given area can support usually through the most unfavorable period of the year
life table
need to collect or know #’s of individuals at each age or stage class
cohort
a group of individuals of the same age
cohort life table
following fate of individuals born in the same time period
time specific life table
age distribution data are collected from a cross section of the population during a short segment ot time
net reproductive rate
average number of females that will be produced by a female over a lifetime. Ro > 1 population is growing
Ro = 1 population is staying the same
Ro < 1 population is declining
generation time
I have no idea
survivorship curve
Type I- Humans.high survival of young, followed by high rates of mortality at physiological lifespan of organism, Type III- high mortality of young, survivors have a long life span THINK ARROW TO SURVIVE
stable age distribution
same proportion of individuals in each age class over time
demographic stochasticity
random changes in birth and death rates inherent in the species
environmental stochasticity
changes in birth and death rates due to random changes in the environment
