Unit 6 Lecture 34

Question 1

In response to climate change what are the only options for organisms?

Answer 1

They must move, adapt, or they will go extinct

Question 2

Did species move?

Answer 2

• Many species from end-pleistocene still living
• Many species did move in response to warming

Question 3

Did species typically move north?

Answer 3

• Species did not always move due north cause of high elevations
• Depends upon species requirements

Like Northern pocket gopher because they require a specific soil type

Or like the eastern chipmunk

Question 4

Explain the differ in range shifts for oaks

Answer 4

• Oak were restricted to SE US and Florida
• As glaciers started to retreat, oak started to move north while spruce move to the east
• Because species differ in their requirements they differ in response to climate change

Question 5

What does non-analog mean?

Answer 5

Combinations of species that differ from anything we see today

Question 6

When we have non-analog plant communities what happens with climate?

Answer 6

There will be non-analog climate (combinations of temperature + precipitation that we just don’t see today)

Question 7

Why are some areas non-analog?

Answer 7

The fundamental niche for species 1 overlaps with niches for species 2 in an available environmental space

Question 8

Give an example of a species who adapted during environmental change

Answer 8

• Neotoma Middens consist of plant fragments, rocks, and fecal pellants
• Found throughout the southeast
• A single cave may contain dozens of middens
• As temperature rise, their body size goes down

Question 9

Name the 4 common features of the big 5 mass extinctions

Answer 9

1. Most involve more than one period of ecolgogical crisis
2. All effect the tropics most profoundly
3. Biological recovery takes millions of years
4. Extinction/survival patterns suggest that mass extinctions are evolutionary wildcards