Title: Unit 10 Quiz
Course: BIS 205 Field Ecology - Copy > Section: BIS 205 Field Ecology - Copy

Q: The __________ describes the situation where many species coexist without competitive exclusion while inhabiting a relatively simple environment and competing for the same nutrients.
- foibles of forbs
- Shannon-Wiener index
- rank-abundance curve
- intermediate disturbance hypothesis
- paradox of the plankton
A: paradox of the plankton

Q: A community is a
- group of species that all have the same niche.
- group of a single species inhabiting a defined region.
- habitat that organisms are capable of inhabiting.
- group of interacting species inhabiting a defined area.
- subpopulation of a species that can exchange individuals with another subpopulation.
A: group of interacting species inhabiting a defined area.

Q: Describe the relationship between disturbance and species diversity.

Q: A forest community contains 6 burr oak, 3 red maple, and 1 white birch. The species richness of this community is
A: 2.99

Q: A forest community contains 6 burr oak, 3 red maple, and 1 white birch. The Shannon-Weiner diversity index of this community is
A: 0.87

Q: Which scenario would likely produce the greatest plant diversity in a North American grassland?
- no disturbance from prairie dogs
- slight disturbance from prairie dogs
- intermediate disturbance from prairie dogs
- high amount of disturbance from prairie dogs
A: intermediate disturbance from prairie dogs

Q: A group of organisms that all make their living in a similar way is a [_____]
A: guild

Q: Robert MacAurthur's research on forest warblers indicated
- warbler diversity increases with increased habitat complexity.
- warbler diversity decreases with increased habitat complexity.
- warbler diversity decreases with decreased habitat complexity.
- different warbler species all inhabit the same region of the forest.
- short height trees held greater diversity of birds than taller forests.
A: warbler diversity increases with increased habitat complexity.

Q: A rank-abundance curve with a steep gradient indicates
- high evenness.
- low evenness.
- a declining population.
- a rapidly growing population.
- a very diverse community.
A: low evenness.

Q: A larger sample size reveals more of a lognormal distribution.
- True
- False
A: True

Q: The Shannon-Wiener diversity index is only influenced by species richness and not species evenness.
- True
- False
A: False

Q: Of the following Shannon-Wiener indexes, which would indicate the greatest species diversity?
- -2.2
- 0.12
- 0.53
- 0.92
- 1.91
A: 0.92

Q: As relative soil fertility increases, the number of plant species present
- increases
- decreases
- increases then decreases
- decreases then increases
- do not change
A: decreases

Q: If one species in a community is very numerous, this will increase the species diversity.
- True
- False
A: False

Q: A typical community contains
- mostly rare species with a few moderately common and very common species.
- more moderately common species and fewer rare or very common species.
- approximately equal amounts of rare, moderately common, and very common species.
- more very common species than moderately common or rare species.
A: more moderately common species and fewer rare or very common species.

Q: In general, as more areas become more urbanized their species assemblages become
- more homogenous
- more disparate
- dominated by a single species
- more diverse
A: more homogenous