Final Flashcards

0
Q

apomorphic

A

evolutionary traits that are derived, not original

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1
Q

panibiogeography

A

large scale similiarties between continents, this is seen as similar to disjunction.

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2
Q

pleisomorphic

A

original or ancestral traits

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3
Q

phylogenies

A

the analysis of patterns of distribution of organims using groups whose interrelationships are analyzed using cladistics.

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4
Q

cladogenesis

A

evolutionary splitting in which each smaller branch forms a clade with individuals having inherited characteristics

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5
Q

endemism

A

a speciesa that is unique to a defined bigeographical region

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6
Q

provincialism

A

the degree to which species are restricted to a particular region

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7
Q

disjunction

A

different communities of the same species

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8
Q

vicariance

A

when a barrier seperates a species (ex. mountains oceans etc)

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9
Q

dispersal

A

When species travel to new areas through movement.

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10
Q

will hennig

A

Progression rule- as Clade’s diversify,pleisomorphic traits dominate the centers of origin. The most displaced member will have the most apomorphic traits.

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11
Q

lars brundin

A

Placed phylogenies on geography but explained it with dispersal rather than large vicarianc even events

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12
Q

len croizat

A

Creator of panbiogeography, which explains how vicariance is the explanation for all modern day species. Didn’t Use phylogenies.

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13
Q

comparitive approach

A

That different species under similar circumstances/ in the same area will have similar evolutionary traits
Ex Australia maursipals, reptiles

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14
Q

geo dispersal

A

Consistent dispersal among continents via wind currents

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15
Q

nothofagus example of geodispersal

A

Nothofagus spread across southern continents via wind dispersal

16
Q

continental crust island

A

split from continent due to seafloor spreading

17
Q

hotspot island chain

A

magma formed islands on a moving plate and mid ocean ridges

18
Q

island arcs

A

subduction zones

19
Q

adaptive radiations

A

diversification of ancestral groups into new related forms specialized to fit different environments, often further specializing into further groups
ex finches on galapagos developing different beaks to specialize for different foods

20
Q

gigantism

A

release from predators and competition increases risk
-in mammals species that are small on mainland will become large
ex komodo droagon

21
Q

dwarfism

A

due to reduced resources on an island (which allows larger populations)
ex. pygmy mammoths

22
Q

affects on island immigration rate

A
  • isolation (the more isolated, the less immigration)
  • species richness
  • –saturation: as saturation increases, immigration declines
  • –resource limitation and competiton
  • least important effect: size of island
23
Q

Affects on island extinction rates

A
  • size of island: small islands have fewer species and smaller populations
  • species richness
  • –resource limitation and competition: greater species richness means more specialization amongst residents and a limitation of resources causing extinctions
  • – random extinction events increase when more species present
  • less important effect: island isolation
24
Q

nestedness

A

small islands with less species are subsets of the larger islands that contain those species

25
Q

cenozoic climate history

A

(65mya - present)

constant shift between warming and cooling

26
Q

mesozoic climate history

A

fill

27
Q

paleozoic climate history

A

fill

28
Q

Dynamic equilibrium

A

fill

29
Q

Great american interchange

A

3.5 million years ago
when the two America continents collided in panama and animals where able to flow across the past barrier. North America had a higher diversity of animals, especially mammals. Marisupals of south america were at a disadvantage compared to mammals

30
Q

Evolution events influenced by TECO

A

Tectonic, eustatic(sea level change), climate, oceanography(sea floor spreading)