quiz6 ch 22 Flashcards Preview

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Flashcards in quiz6 ch 22 Deck (15)
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1
Q

MacArthur came up with

A

geographic ecology

2
Q

geographic ecology

A

look for patterns of plant and animal life that can be put on map like:
above level landscape ecology and vast breadth

3
Q

Preston study of island area and species richness

A

few bird species on smallest islands and most species on large islands

4
Q

Nilsson et al. study of island area and species richness

A

island areas are best predictors of species richness

5
Q

MacArthur and Wilson equilibrium model of island biogeography

A

explains patterns of species diversity on island as result of immigration and extinction rates.
immigration rates are highest on new island with no organisms.
as species accumulate, immigration rates decline since fewer arrivals are new species

6
Q

equilibrium model of island biogeography predictions

A

rate of extinction rise with increasing number of species causing the population size to diminish.
has larger pool of potential extinction.
competitive interaction btwn spp increase

7
Q

species turnover

A

equilibrium model predicts species composition on island is fluid

8
Q

latitudinal gradient

A

most groups of organisms are mores sp rich in tropics

9
Q

6 categories of latitudinal gradients

A
time since perturbation 
productivity 
environmental heterogeneity 
favorableness 
nich breadth 
interspecific interactions
10
Q

time since perturbation

A

tropics that are older and sutured less often.
more time for speciation.
less frequent disturbance reduce extinction rate.

11
Q

productivity

A

high productivity and high spp richness.

more energy to divide among population, doesn’t include nutrients

12
Q

environmental heterogeneity

A

more heterogeneity leads to more potential habitat areas/niches.
small islands = more complex

13
Q

favorableness

A

tropics = favorable environments.
no extremes to limit diversity
more diversity = more stable

14
Q

nich breadth

interspecific interaction

A

biological process plays a secondary role.

ultimate cause = physical differences

15
Q

continental area and species richness

A

positive relationship.

bigger areas = more spp richness