Slide Set 7

Question 1

spacial gradients in diversity include?

Answer 1

• lattitudinal and altitudinal

Question 2

important patterns in taxon richness include?

Answer 2

1. climate
2. topography
3. landmass configuartion
4. ocean basins and ocean currents

Question 3

for mammals the gradient in spcies richness is largely due to ?

Answer 3

• increases in number of bat species

- increases in number of species that rely on fruits and insects

Question 4

describe the distribution patterns of trees in USA?

Answer 4

• very high divercity in the southeast
• very low divercity in the mdiwest
• no clear latitudinal pattern
• in canada the latitudinal pattern is clear

Question 5

Potential and Actual Evapotranspiration – these measures link ______ and availability of _____ – and can be used to assess plant primary productivity

Answer 5

temperature, water

Question 6

together ____ and ______ plus soil fertility can account for levels of primary productivity

Answer 6

PET and AET

Question 7

in general primary productivity is greatest in areas that are ______ and ________

Answer 7

warm and moist

Question 8

PET

Answer 8

Potential EvapoTranspiration

- is the amount of available energy that could be captured by plants

Question 9

AET

Answer 9

Actual EvapoTranspiration

- the amount of energy actually captured by plants

Question 10

PET and AET can be used as measures of ________

Answer 10

productivity

Question 11

what is rapports rule or effect?

Answer 11

the tendency for geographic range size to increase with latitude, occurs for many groups

Question 12

Rapports rule doesnt follow for all species why?

Answer 12

• Not all species that do conform to the rule do so in the same way in every biogeographic region
• lots of variation within taxa
• More intense competition in the tropics
• More intense predation in the tropics

Question 13

often species richness rises to a maximum at ____ latitiudes then declines at _____ altitudes

Answer 13

mid

higher

Question 14

hotspots is a term coined by whom?

Answer 14

by Dr. Norman Myers, who is regarded as a leader in biodiversity conservation
* drew the worlds attention to modern day rates of extinction

Question 15

hotspots

Answer 15

Area must contain at least 1,500 endemic plant species

Question 16

ubrella species concept is based on ?

Answer 16

• assumption where one species or group can serve as indicator for less well known species
• Preserving the umbrella species serves to preserve others