Exam 19: Community Succession　

A) Species richness initially decreases with time in aquatic succession.
B) Species richness initially increases with time in terrestrial succession.
C) Species richness shows no change with time in aquatic succession.
D) Species richness shows no change with time in terrestrial succession.

Correct Answer

verified

Show Answer

Correct Answer

Answered by ExamLex AI

The priority effect refers to the phenom...

View Answer

Show Answer

A) do not change.
B) always have a fixed trajectory to the climax stage.
C) are always changing.
D) are usually shaped by abiotic factors only.

Correct Answer

verified

Show Answer

A) priority effect
B) inhibition
C) facilitation
D) tolerance

Correct Answer

verified

Show Answer

A) Spruce seeds are not likely to disperse to the pioneer and low-shrub stages.
B) Spruce seedlings are inhibited by the presence of low shrubs.
C) Spruce seedlings are not tolerant to the environmental fluctuations in the pioneer stage.
D) There are few alder trees in the early seral stages to facilitate spruce establishment.

Correct Answer

verified

Show Answer

A) Grazers ate most of the grass species in the area.
B) Legumes have not established everywhere in the forest.
C) Disturbances have produced gaps of intense sunlight.
D) Fire has removed most of the understory species.

Correct Answer

verified

Show Answer

A) pollen sediments from a pond
B) direct observation
C) tree rings
D) carbon dating of wood

Correct Answer

verified

Show Answer

A) is often faster than succession in terrestrial environments.
B) is often slower than succession in terrestrial environments.
C) has more seral stages than succession in terrestrial environments.
D) never reaches a climax community.

Correct Answer

verified

Show Answer

Correct Answer

Answered by ExamLex AI

Gaps in a forest canopy occur when trees...

View Answer

Show Answer

Correct Answer

verified

Show Answer

A) apex
B) baseline
C) climax
D) final

Correct Answer

verified

Show Answer

A) climax
B) initial
C) secondary
D) primary

Correct Answer

verified

Show Answer

A) undergoes rapid environmental change.
B) is frequently disturbed.
C) is attacked by a pathogen.
D) is colonized by invasive species.

Correct Answer

verified

Show Answer

A) begins with soil containing organic matter.
B) lasts much longer than secondary succession.
C) has rarely occurred in terrestrial environments.
D) usually begins with lichens and mosses.

Correct Answer

verified

Show Answer

A) are initially devoid of plants and organic soil.
B) have some plants following disturbance.
C) have some plants following disturbance but do not have organic soil.
D) have been disturbed and contain no plants but still contain organic soil.

Correct Answer

verified

Show Answer

A) yes, because bird species are usually associated with a particular seral stage
B) yes, because each bird species eats only a particular type of plant
C) no, because some bird species are associated with a number of plant seral stages
D) no, because birds eat a wide variety of insects as well

Correct Answer

verified

Show Answer

Correct Answer

Answered by ExamLex AI

As succession progresses in fields, sand...

View Answer

Show Answer

A) species interactions
B) species competition
C) species composition
D) land use

Correct Answer

verified

Show Answer