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;
24 Cards in this Set
- Front
- Back
|
provide early warning of damage to a community (disappearing amphibians)
|
indicator species
|
|
|
have a large effect on the types and abundances of other species (pollinator, top predators)
|
keystone species
|
|
|
Create or enhance their habitats (beavers)
|
foundation species
|
|
|
interactions where species use only parts of a resource or they use the resource at different times/different ways
|
resource partitioning
|
|
|
interactions where one species eats another
|
predation
|
|
|
interactions where one species feeds off of another
|
parasitism
|
|
|
interactions where species mutually exploit each other
|
mutualism
|
|
|
interactions where one species benefits and the other is not harmed
|
commensalism
|
|
|
Biomes having to start over from scratch
|
primary succession
|
|
|
Biomes having to start over after being disturbed
|
secondary succession
|
|
|
(births + immigration) - (deaths + emigration)
|
population change
|
|
|
all factors that act to limit the growth of a population
|
environmental resistance
|
|
|
maximum population a given habitat can sustain
|
carrying capacity
|
|
|
rate at which population grows with unlimited resources
|
intrinsic rate of increase
|
|
|
population growth starts slowly, then accelerates to carrying capacity when meets environmental resistance
|
exponential growth
|
|
|
decreased population growth rate as population size reaches carrying capacity
|
logistic growth
|
|
|
population declining after it exceeds the area's carrying capacity
|
population crash
|
|
|
average number of children born to women in a population
|
total fertility rate (TFR)
|
|
|
Prereproductive ages (0-14)
Reproductive ages (15-44) Postreproductive ages (45 and older) |
age structure categories
|
|
|
Population grows very slowly because of a high birth and death rate
|
preindustrial stage
|
|
|
1. Preindustrial
2. Transitional 3. Industrial 4. Postindustrial |
demographic transition
|
|
|
Population grows rapidly because birth rates are high and death rates drop
|
transitional transition
|
|
|
population growth slows as both birth and death rates drop (health, education)
|
industrial transition
|
|
|
population growth levels off and then declines as birth rates equal and then fall below death rates
|
postindustrial transition
|
