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Flashcards in chapter 23 Deck (10)
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1

What factors can be used to identify biodiversity hotspots instead of species richness?

number of endemic plant species and amount of vegetation lost

2

The intrinsic value of an ecosystem

considers the value of an ecosystem apart from any economic benefit.

3

Economic benefits of preserving biodiversity include

I. nutrient cycling

II. recreation

III. providing products

4

What rate of extinction will determine if the current rate of extinction is equivalent to a mass extinction?

75%

5

Why is it important to preserve genetic diversity as well as species diversity?

High genetic diversity increases survival in changing environmental conditions.

6

Which is NOT evidence that humans have historically contributed to extinctions through overharvesting?

changes in species composition of forests after logging

7

What is NOT a way introduced species contribute to the extinction of native species?

increasing the fitness of a competing native species

8

Why do we need to consider the process of biomagnification when assessing the risk of a pesticide to wildlife?

It increases risk in species at the top of the food chain.

9

Which is NOT an effect of global climate change that is already being observed?

changing precipitation patterns

10

What challenges can arise when considering a species reintroduction?

I. high monetary cost

II. local opposition to the species

III. changes in land use