Biology Forums - Study Force

PICTURES ARE ATTACHED:
Q9. Examine the following statements about species-accumulation curves and check all that are true.
a-Accumulation curves are used to estimate local or alpha diversity.
b-Accumulation curves increase linearly as the number of samples increases.
c-The shape of an accumulation curve depends, in part, on the order samples are processed.
d-Accumulation curves are not needed when a complete census is available.

Q10. The figure to the right presents the results of a study of local versus regional bird species richness of birds and butterflies in a South African forest. Examine the top panel (birds) first, where the curve appears to reach an asymptote. What does this indicate about the processes structuring the bird community?

a-It suggests that the communities are unsaturated and that the size of the regional pool determines local species richness.
b-It suggests that the communities are becoming saturated and that local processes are likely becoming increasingly important.
c-It does not tell us anything about the relative importance of the regional species pool and local interactions.

Q11. Now examine the lower panel (butterflies), where the curve continues to rise linearly. What does this indicate about the processes structuring the butterfly community?
a-It suggests that the communities are unsaturated and that the size of the regional pool determines local species richness.
b-It suggests that the communities are becoming saturated and that local processes are likely becoming increasingly important.
c-It does not tell us anything about the relative importance of the regional species pool and local interactions.

Q12. Which of the following statements about beta diversity is FALSE?

a)Beta diversity measures how quickly species composition changes across the landscape.
b)There are a variety of different ways researchers have measured beta diversity.
c)Relatively flat, homogeneous habitats tend to have higher beta diversity.
d)Beta diversity changes depending on the scale at which you measure it.

Q13. Paul Ehrlich and E.O. Wilson offered a number of reasons to protect biodiversity. What were they? (Check all that apply.)
a-Earth cannot "survive" another mass extinction event.
b-People have an aesthetic and moral obligation to protect Earth's species.
c-Earth's biodiversity may provide us with important new resources in the future.
d-Loss of biodiversity may reduce ecosystem services that would be difficult to replace.

Q31. Immigration rates decline as the size of an island increases.
True
False

Q32. Extinction rates decline as the number of species on an island increases.
True
False

Q33. Extinction rates increase as the size of an island decreases.
True
False

Q34. All else being equal, turnover rates are higher on small islands than on large ones.
True
False

Q35. When we think of islands, we often think of them as land masses surrounded by water. Ecologists have suggested a much broader definition of an island. Which of the following could be viewed as an island? (Check all that apply.)
A-Mountain top habitats
B-Urban parks
C-Caves
D-The Sahara desert

Q36. Horses originated in North America and then migrated to Asia and Europe. As they migrated, they evolved into the horse species we see today. This is an example of which migration type?
A-Diffusion
B-Jump Dispersal
C-Secular Migration

Q37. Horses went extinct in North America and did not return until they were brought by European settlers. The barrier to horses returning to North America is best described as what?
A-A corridor.
B-A filter.
C-A sweepstakes route.

Q31. Immigration rates decline as the size of an island increases.
True
False

Q32. Extinction rates decline as the number of species on an island increases.
True
False

Q33. Extinction rates increase as the size of an island decreases.
True
False

Q34. All else being equal, turnover rates are higher on small islands than on large ones.
True
False

--> Turnover rates are higher on smaller islands than on large ones.


It suggests that the communities are becoming saturated and that local processes are likely becoming increasingly important.

1. a

2. b

3. a

4. a

5. b

6. c

7. a,b,d

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If you guys need further assistance, start a new topic (https://biology-forums.com/index.php?action=post;board=6.0)... This one is already pretty old

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Looks good to me

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Thank you so much for this. I was struggling really hard with this assignment!

Feel free to ask any follow-up questions!

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