Deck 8: Demographic Techniques and Population Patterns

Question 1

To estimate plant densities, ecologists usually use

A) Mist nets
B) Pitfall traps
C) Mark recapture
D) Quadrats
E) suction sampler

Answer 1

Quadrats

Question 2

If you employed a line transect, you would probably be sampling:

A) birds.
B) lizards.
C) trees.
D) mammals.
E) spiders.

Answer 2

trees.

Question 3

D-vac suction samplers are normally used to sample

A) Plants
B) Birds
C) Insects
D) Mammals
E) Fish

Answer 3

Insects

Question 4

In a forest, the dispersion of trees starts off _________________ but ends up _______________ .

A) random, uniform
B) uniform, clumped
C) clumped, uniform
D) fragmented, clumped
E) random, clumped

Question 5

The construction of roads through an otherwise intact forest creates

A) Internal fragmentation
B) Perforated habitat
C) External fragmentation
D) Overdispersion

Question 6

Over the past two hundred years, the clearance of forested areas has resulted in isolated patterns of trees, with a dispersion pattern that is

A) Random
B) Uniform
C) Clumped
D) Underutilized
E) Overextended

Question 7

If individuals in a population attracted one another, what would be their dispersion pattern?

A) Clumped
B) Random
C) Uniform
D) Perforated
E) Fragmented

Question 8

Plant competition from shading of neighbors and root competition results in which dispersion pattern?

A) Clumped
B) Random
C) Uniform
D) Fragmented
E) Indirect dispersion

Question 9

Joshua Tewksbury's landscape study in South Carolina showed that corridors facilitated the movement of

A) Butterflies
B) Birds
C) Mammals
D) Fish
E) Bats

Question 10

If x is the extinction rate of populations in patches per unit time and m is the rate of movement between patches, then, according to Richard Levins, the proportion of occupied patches in a metapopulation will stabilize over time to

A) (x/m)
B) 1 + (x/m)
C) 1 - (x/m)
D) 1/(x/m)
E) 1x/m

Question 11

Which is not a possible type of metapopulation?

A) Core-satellite
B) Classic
C) Inverted
D) Patchy
E) Non-equilibrium

Question 12

In the mark-recapture method of estimating population densities, a loss of tags would result in an underestimate of population size.

Question 13

Small mammals are more common than large mammals.

Question 14

Small soil dwelling organisms may be sampled using a Berlese funnel.

Question 15

The matrix is the most extensive element in a landscape.

Question 16

In Scotland, dunlin densities are less around pools embedded in a low-biomass vegetation matrix of European heather.