Details

Autor(en) / Beteiligte

• Anderson, Sean A S
• Weir, Jason T

Titel

The role of divergent ecological adaptation during allopatric speciation in vertebrates

Ist Teil von

• Science (American Association for the Advancement of Science), 2022-12, Vol.378 (6625), p.1214-1218

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Science Online_科学在线

Beschreibungen/Notizen

• After decades of debate, biologists today largely agree that most speciation events require an allopatric phase (that is, geographic separation), but the role of adaptive ecological divergence during this critical period is still unknown. Here, we show that relatively few allopatric pairs of birds, mammals, or amphibians exhibit trait differences consistent with models of divergent adaptation in each of many ecologically relevant traits. By fitting new evolutionary models to numerous sets of sister-pair trait differences, we find that speciating and recently speciated allopatric taxa seem to overwhelmingly evolve under similar rather than divergent macro-selective pressures. This contradicts the classical view of divergent adaptation as a prominent driver of the early stages of speciation and helps synthesize two historical controversies regarding the ecology and geography of species formation.