Diversification

Macroevolution large scale patterns of evolution gradualism continuous changing forms, linking ancestors and descendants gaps are due to bad record punctured equilibrium diversity occurs during speciation, stasis in-between Evolutionary radiation rapid bursts of morphological diversity due to ecological opportunity key innovation (highly beneficial adaptation to exploit a new resource, or to compete) Measuring diversification Lineage diversification the process by which the number of species in a lineage changes Speciation (λ): the birth of new lineages Extinction (μ): the death of lineages Net diversification (r): λ-μ γ = 0 constant rate model γ < 0 early and rapid model γ > 0 late branchf ![[Pasted image 20260225142347.png]] ![[Pasted image 20260225142406.png]]