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
