Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
A population's vital statistics (e.g. size, distribution, density, age structure)
|
demographics
|
|
|
Number of individuals making up a population
|
population size
|
|
|
Of a population, distribution of individuals among different age categories
|
age structure
|
|
|
all individuals of a population that are in the pre-reproductive and reproductive age brackets
|
reproductive base
|
|
|
Number of individuals making up a population
|
population density
|
|
|
pattern of dispersion of individuals of a population
|
population distribution
|
|
|
one of many areas of a given size and shape in which samples are taken of individuals of a population are counted
|
Quadrats
|
|
|
For population counts; collecting, marking, releasing, then recapturing representitive animals
|
capture-recapture methods
|
|
|
New individuals permanently move into an area
|
immigration
|
|
|
individuals leave a population
|
emigration
|
|
|
recurring movement of organisms from one region to another, then back
|
migration
|
|
|
no overall increase or decrease in population size during a specified interval
|
zero population growth
|
|
|
per individual
|
per capita
|
|
|
for population growth equations, a variable combining birth rates and death rates; assumes that both remain constant in specified interval
|
net reproduction per individual per unit time
|
|
|
an increase in population size by a fixed percentage of the whole in a given interval
|
exponential growth
|
|
|
length of time it takes a population to double in size
|
doubling time
|
|
|
the maximum rate of increase of a population under ideal conditions
|
biotic potential
|
|
|
any essential resource that can halt population growth when supplies of it dwindle
|
limiting factor
|
|
|
the maximum number of individuals in a population (or species) that a given environment can sustain indefinitely
|
carrying capacity
|
|
|
the size of a population increases slowly, then rapidly, then levels off as the carrying capacity is reached
|
logistic growth
|
|
|
factor that operates at high population density to slow birth rate and/or increase death rate (disease, competition)
|
density-dependent controls
|
|
|
factor that impacts a population's birth rate or death rate regardless of density (fire or flood)
|
density-independent factor
|
|
|
adaptations affecting life span, fertility, and age at first reproduction
|
life history pattern
|
|
|
a group of smae-aged individuals, tracked throughout their life spans
|
cohort
|
|
|
a graph that reflects how many individuals of a cohort survive, on average, at successive ages in their life span
|
survivorship curve
|
|
|
TFR, w/in a population, the average number of children born to a woman during her reproductive years
|
total fertility rate
|
|
|
explanation of the effects of industrialization on human population growth
|
demographic transition model
|
