Pop. growth and resource availability

FINALLY

size (N)

total # of individuals in a given area at a given time (larger= safer from pop. decline)

density

number of individuals in an area (higher density=higher comp., possibility for disease, depleting food sources

distribution

how individuals in pop. are spaced out compared to each other

random distribution

trees

uniform distribution

territorial distribution

clumped distribution

herd/group animals

sex ratio

ratio of males to females, die off or bottleneck effect can lead to skewed sex ratio

density dependent factors

food, comp. for habitat, water, light, disease, limit pop growth based on size

density independent factors

influence pop growth independent of size- natural disasters, 

biotic potential

max potential growth rate, with NO limiting resources aka intrinsic rate of increase- r, may initially occur, but due to limiting resources, goes to carrying capacity (k)

logistic growth

initial rapid growth, then limiting factors limit pop. to k