macroevolution - speciation
DESCRIPTION
MACROEVOLUTION - Speciation. The evolution of a new, separate species. BioH Ch 17. Considerations. Reproductive Isolation Mechanisms. Pre Zygotic Behavioral Temporal Mechanical. More Pre-Zygotic Reproductive Isolation Mechanisms. Ecological Gametic mortality Habitat (most common). - PowerPoint PPT PresentationTRANSCRIPT
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MACROEVOLUTION - SpeciationThe evolution of a new, separate species
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BioH Ch 17
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Considerations
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Reproductive Isolation Mechanisms
Pre ZygoticBehavioral
Temporal
Mechanical3
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Ecological
Gametic mortality
Habitat (most common)
More Pre-Zygotic Reproductive Isolation Mechanisms
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Post-Zygotic Isolation Mechanisms
Hybrid viability – embryonic premature death
Hybrid infertility
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Allopatric Speciation
Geographic barriers
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Sympatric Speciation
Species form within a population home range -no physical barriers
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Parapatric Speciation
Neighboring populations give rise to new species
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Hybrid
Bullock’s OrioleBaltimore Oriole
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m. domesticus
m. musculus
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Speciation PatternsCladogenesis – branching
lineage
Anagenesis – unbranching descent
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Exercise
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Patterns of Speciation
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Adaptive Radiation
Adaptive Zones 13
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Extinction
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