Day 23 April 19th Chapter 16

8/2/2019 Day 23 April 19th Chapter 16

1/42

Day 23 April 19th Chapter 16

Almost there!!! You can do it!!!


2/42

Classes Left

4/19 Today Chapter 16

4/24 Chapter 16

4/26

End CH 16, Class evals, Study

Guide and Clicker Review

4/30

FINAL EXAM


3/42

Chapter 16: Conservation and Biodiversity

Human influences on the environment

Lectures by Mark Manteuffel, St. Louis Community College ; Clicker Questions by Kristen Curran, University of Wisconsin-Whitewater


4/42


5/42

16.1 Biodiversity benefits

humans in many ways.


6/42


7/42

Consider also the following:

Vinblastine and vincristine Two chemicals from theMadagascar periwinkle treating leukemia andHodgkins lymphoma

AncrodChemical from the Malayan pit viperdissolves blood clots and is effective in treating someheart attack and stroke patients.

Epibatidinechemical from small frog 200 timesmore effective than morphine in relieving pain and isnon-addictive.


8/42


9/42


10/42


11/42

If we choose to protect a specific parcel of land,

say the one from the last slide, we are

protecting

1. genetic biodiversity.

2. species biodiversity.3. habitat biodiversity.

4. all of the above.


12/42

If we choose to protect a specific parcel of land,

say the one from the last slide, we are

protecting

1. genetic biodiversity.

2. species biodiversity.3. habitat biodiversity.

4. all of the above.


13/42

16.3 Where is most

biodiversity?


14/42


15/42

Why are there more species in an acre of tropical

rain forest than in an acre farther from the

equator, such as in a temperate forest or prairie?

Latitudinal Biodiversity Gradient


16/42


17/42


18/42

How do the location of biodiversity hot spots and

number of mammalian species correlate?

1. Biodiversity hot spots are

located in places where thereis overall low biodiversity ofmammals.

2. Biodiversity hot spots arelocated in places where there

is overall high biodiversity ofmammals.


usually found closer to thepoles, whereas mammalian

biodiversity is greatest nearerto the equator.

4. 1 and 3


19/42

How do the location of biodiversity hot spots and

number of mammalian species correlate?


located in places where thereis overall low biodiversity ofmammals.

2. Biodiversity hot spots arelocated in places where there

is overall high biodiversity ofmammals.


usually found closer to thepoles, whereas mammalian

biodiversity is greatest nearerto the equator.

4. 1 and 3


20/42

16.4 Island biogeography helps us

understand the maintenance andloss of biodiversity.


21/42


22/42


23/42


24/42


25/42

16.5There are

multiplecauses ofextinction.


26/42

On average, species persist for about 10 million years,

although some last for hundreds of millions of years


27/42


28/42

According to the graph, when was the largest

mass extinction event?

1. 450 million years ago






29/42

According to the graph, when was the largest

mass extinction event?







30/42

16.6 We are in the midst of a

mass extinction.


31/42

Current rates of extinction in every well-

studied group of plants and animals supportthe hypothesis that a mass extinction is

underway.

Seems to be the result of the activity of one

specieshumans.

11% of all species are currently endangered14% are threatened

4% of all species are endangered and

50% are in decline


32/42


33/42


34/42


35/42

16.7 Some ecosystem disturbances

are reversible, others are not.


36/42


37/42


38/42

16.8 Disruptions of ecosystems can be

disastrous.

1) Introductions of exotic species


39/42


40/42

Why should we worry about

exotic species?

Like the brown tree snake?


41/42

WHOOPS!


42/42

Documents

Day 23 April 19th Chapter 16