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Everything about Parapatric speciation

Speciation within a population where subpopulations are reproductively isolated

In parapatric speciation, two subpopulations of a species evolve reproductive isolation from one another while continuing to exchange genes. This mode of speciation has three distinguishing characteristics: 1) mating occurs non-randomly, 2) gene flow occurs unequally, and 3) populations exist in either continuous or discontinuous geographic ranges. This distribution pattern may be the result of unequal dispersal, incomplete geographical barriers, or divergent expressions of behavior, among other things. Parapatric speciation predicts that hybrid zones will often exist at the junction between the two populations. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Parapatric speciationA 5-minute orientation
  2. Skim a recent paper: A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiationInfluential work since 2022
  3. Pick up a classic book: How and why species multiplyThe most-reprinted book on the subject
  4. Read the landmark paper: Sympatric, parapatric or allopatric: the most important way to classify speciation?Cited 321 times
  5. Go sideways: Allopatric speciationA closely related topic
  6. Go sideways: History of speciationA closely related topic

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