chap 53

Question 1

net reproductive rate (R0) to calculate the population’s per-generation growth rate

Answer 1

of fems produced T+1 // # of fems produced T

Nt+1 = R0 * Nt

Question 2

net reproductive rate

Answer 2

It helps predict future population size in one generation

Question 3

per capita growth rate (r)

Answer 3

births - deaths

Δ N (pop) // Δ T (time) = B-D

Question 4

Exponential growth

Answer 4

• represents a J-shaped curve
• rapid pop growth
• resources are NOT limited
• higher per capita growth rate (r) makes the pop increase more rapidly

dN // dT = rmax N

Question 5

Logistic growth

Answer 5

• represents an S shape
• occurs when pop reaches carrying capacity
• per capita growth rate (r) gets smaller as pop reaches cc

dN // dT = rmax N (K-N/K)

Question 5

density-dependence factors + how it can limit pop size

Answer 5

whose influence varies w/ pop density

• parasitism, predation, and competition
• may lead to logistic growth - pop size will level off as its near cc

Question 5

characteristics of K-selected species

Answer 5

stable pops that exist near cc
lower rep rate but are better competitors

slow rep rates

Question 6

density-independence factors + how it can limit pop size

Answer 6

whose influence doesnt depend on the size/density of a pop.
small pops are at a greater risk of being wiped out

• fire
• flooding
• drought

Question 6

characteristics of r-selected species

Answer 6

high rate of per capita pop growth (r) but poor competitive ability (premature deaths)

fast rep rates

Question 6

future pop growth of humans

Answer 6

• exponential and slowing down
• cc depends on ecological footprint and consumption rate

Question 7

eco footprint

Answer 7

aggregate total of productive land needed for survival in a sustainable world

Question 8

pop

Answer 8

group of inds that live in the same area and are of the same species

Question 9

carrying capacity (cc)

Answer 9

large # of inds of a pop that an env can support