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Patterns of speciation- Allopatric, Sympatric, Parapatric and Peripatric

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Anagenesis
Original species is transformed
into a different species over
many generations
Patterns of Speciation
Cladogene...

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Types of Speciation
Allopatric Speciation
2
Original
species
Geographical
Barrier
New
species

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Allopatric
● Grand Canyon
● Kaibab and Abert squirrels
3
Alios= other

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Patterns of speciation- Allopatric, Sympatric, Parapatric and Peripatric

  1. 1. Anagenesis Original species is transformed into a different species over many generations Patterns of Speciation Cladogenesis Pattern of branching in which an ancestral species gives rise to two or more new species 1 klados=branch Common Branching evolution Promotes biological diversity - No. Of species Ana= new genos= race Rare Phyletic evolution One taxon replaces the other
  2. 2. Types of Speciation Allopatric Speciation 2 Original species Geographical Barrier New species
  3. 3. Allopatric ● Grand Canyon ● Kaibab and Abert squirrels 3 Alios= other
  4. 4. Types of Speciation Allopatric Speciation 4 Sympatric Speciation Original species Genetic polymorphism New species
  5. 5. SYMPATRIC ● Hawthorn flies and apple flies ● Genetically Isolated while in the same place 5 sym=togather
  6. 6. Types of Speciation Allopatric Speciation 6 Sympatric SpeciationParapatric Speciation Original species New niche formed New species Adjacent niche
  7. 7. Parapatric ● Grass growing in areas contaminated with heavy metals ● Not reproductively isolated ● Reduced gene flow 7 Anthoxanthum odoratum
  8. 8. Types of Speciation Allopatric Speciation 8 Sympatric Speciation Parapatric Speciation Peripatric Speciation Original species New species New niche formed Isolated niche
  9. 9. Peripatric ● Mainland Vs Island flies ● Reproductively Isolated ● “Founder effect” 9 peri= periphery

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