5.) Populations cannot grow indefinitely Flashcards
1
Q
What is the bide process?
A
Births, immigration, deaths, emigration
2
Q
what does a exponential growth model look like/act like
A
- caused by a constant rate of increase
- J shaped
- not sustainable
3
Q
what is carrying capacity
A
K
4
Q
what slows population growth in non humans?
A
- primarily intra-specific competition (mortality rate increase, repro decrease, growth rate decrease)
- disease
- predation
5
Q
Logistic growth model acts like/look like
A
- s curve to k (carry cap)
- has carrying capacity
6
Q
what has caused an explosion in human pop
A
- advances in agriculture
- decrease in infant mortality
7
Q
why does human birth rate decrease?
A
- decrease of infant mortality rates
- need for fewer children
- increase in wealth
- Women: access to edu, jobs, contraception
8
Q
Demographic Transition
A
Shift between high birth/death to low birth/death.
-Lag between birth/death rate causes exponential growth.
9
Q
what is N?
A
number of individuals
10
Q
I-PAT equation
A
Env impact of humans: Population x Affluence X Technology
Today: Impact=eco footprint x person
