2.2 Study Guide Flashcards
Positive growth equation
Birth + Immigration > Death+ Emigration
Negative growth equation
Birth + Immigration < Death + Emigration
No growth equation
Birth + Immigration = Death + Emigration
Variable for maximum growth rate per capita
r
Variable for carrying capacity
K
Population size
N
Which growth has a carrying capacity
Logistic growth
Define carrying capacity
Maximum population the environment can support
What does dN/dt mean
Quantity representing population growth rate
When is growth the highest
When the distance between birth and death is largest
A lack of food prevents a certain population from growing any further
Logistic growth
The larger the population gets, the faster it grows
Exponential growth
Can happen in ideal environments with few limiting factors
Exponential growth
Population growth is slow right at the beginning and when the population nears carrying capacity
Logistic growth
Literal conversion of dN/dt
change in #/change in time
What are density-dependent factors
Any force that affects the size of a population of living things in response to the density of the population (tend to be abiotic)
What are density-independent factors
Any force that affects the size of a population of living things regardless of the density of the population (tend to be abiotic)
Examples of density-dependent factors
Competition for water, Disease
Examples of density-independent factors
Flood, Drought
Meaning of N o
constant representing initial population size
Exponential growth equation
dN/dt = rN
Logistic growth equation
dN/dt = rN (K-N)/K
