Ecology II Lecture 30

Question 1

Demography: Definition

Answer 1

A study of the vital statistics (births, deaths) of a population and how they vary with age.

Question 2

Life table: Definition

Answer 2

Vital statistics of a cohort (e.g., a group of individuals born at the same time).
Includes survivorship and fecundity.

Question 3

What do exponential and logistic growth models assume?

Answer 3

Everyone in the population is the same -> same birth and death rates for all.

Question 4

Type History: Type 1 Curve

Answer 4

High survivorship until old age.

Question 5

Type History: Type 2 Curve

Answer 5

Constant probability of dying across each year.

Question 6

Type History: Type 3 Curve

Answer 6

Most newborns die, but surival of adults is high.

Question 7

Fecundity:

Answer 7

An organism’s reproductive capacity (the number of offspring its capable of producing).
Generally - the higher the fecundity the less likely an organism is to invest in each offspring.

Question 8

R0 The Net Reproductive Rate:

Answer 8

Definition: Average number of offspring produced by an individual during its life.

Question 9

Carrying Capacity Equation:

Answer 9

Nt = K x N0e^RT / K+N0 (e^rt-1)

Question 10

Age-Sex Pyramids

Answer 10

Births add individuals only to the base of the pyramid.
Deaths remove individuals from the population at all ages after birth.