Bio 102 Lab Population Growth

Front 1

Population

Back 1

is a group of individuals of a single species living in the same general area

Front 2

Density

Back 2

is the number of individuals per unit area or volume

Front 3

Dispersion

Back 3

is the pattern of spacing among individuals within the boundaries of the population

Front 4

Biotic potential

Back 4

is the maximum reproductive capacity which when be plotted as Theoretical population growth which can be called a J-curve

Front 5

Environmental resistance

Back 5

includes all limiting factors that prevent biotic potential from being attained

Front 6

Realized population

Back 6

is the actual growth of a population and when plotted is often called an S-curve

Front 7

density-independent factors:

Back 7

factors exert the same effect regardless of population size.

Front 8

density-dependent factors:

Back 8

The factors effects increase as population increases

Front 9

Theoretical vs realized curve 1

Back 9

Lag phase-due to small number of organisms

Front 10

Theoretical vs realized curve 2

Back 10

Exponential growth phase-periodic doubling of populations

Front 11

Theoretical vs realized curve 3

Back 11

Inflection point-start of decreasing growth phase

Front 12

Theoretical vs realized curve 4

Back 12

Decreasing growth phase-curve makes a right turn

Front 13

Theoretical vs realized curve 5

Back 13

Carrying capacity- population size in balance with the environment

Front 14

Growth rate formula

Back 14

Birthrate minus death rate over 1000

(B-D)÷1000

must convert from decimal to percentage

Front 15

DOUBLING TIME=Time required for a population to double in size

Back 15

Determined by dividing 70 years (demographic constant) by growth rate

70÷(Gr%)