Exam2

Question 1

Abundance

Answer 1

Now many individuals

Question 2

Distribution

Answer 2

Location of individuals

Question 3

Why measure abundance?

Answer 3

Fundamental to ecology, management of resources, species conservation, control of pests

Question 4

Vital rates are

Answer 4

Rates of births deaths and migration typically calculated per - capital (per individual).

Question 5

Vital rates canbe used to predict?

Answer 5

Abundance change in the future through mathematical equations

Question 6

Method of measuring abundance

Answer 6

Plots, transects, traps, complete sampling

Question 7

What does each portion of the geometric growth equation mean?
Nt=Nt+bNf-(dNf)

Answer 7

N= number of individuals in population
t= unit of time
b=births per induvidual
d= deaths per individual

Question 8

When does lambda mean an increasing or decreasing population?

Answer 8

Lambda =1 pop stable
Lambda <1 population decreasing
Lambda >1 population increasing
Lambda=0 population extinct

Question 9

Density-dependent vital rates are when…

Answer 9

Population growth rates change as population density changes

Question 10

Density independence is…

Answer 10

Population growth rates are not a function of density

Question 11

Deterministic extinction is…

Answer 11

A decline to extinction of the population is predicted by the current vital rates

Question 12

Stochastic vital rates are when

Answer 12

Variation is unpredictable. More likely to be experienced by small pop. Will lead to lower growth rate than expected

Question 13

Stochastic vital rates are when

Answer 13

Variation is unpredictable. More likely to be experienced by small pop. Will lead to lower growth rate than expected

Question 14

Stochastic extinction…

Answer 14

Extinction due to variation in vital rates

Question 15

Environmental stochasticity

Answer 15

Vital rates vary with environment

Question 16

Demographic stochasticity

Answer 16

.Vital rates vary among individuals in the same environment

Question 17

Metapopulations:

Answer 17

A network of populations that can individually go extinct but be recolonized through dispersal. Also a group of several populations that are linked by immigration

Question 18

The levins model represents

Answer 18

Population - level vital rates (metapopulations).

Question 19

What do metapopulations depend on?

Answer 19

The persistence of entire metapopulations depends on empty patches being available

Question 20

Matts Ta talk… Hypothesis

Answer 20

Fish in urban environments will experience population shifts in response to Alan exposure.

Question 21

Maximum sustainable yield (msy):

Answer 21

Conditions under which we can maximize harvest without driving the population down

Question 22

MSY is predicted at

Answer 22

1/2 k

Question 23

Potential model problems with MSY

Answer 23

Problems with model
Practical problems (by catch, measuring, economics, compliance & enforcment)
Enviorment& evolution changes