Macroevolution posed difficulties for Darwin and later theorists because species’ phenotypes frequently change abruptly, or experience long periods of stasis, both counter to the theory of incremental change or gradualism. We introduce a statistical model that accommodates this uneven evolutionary landscape by estimating two kinds of historical change: directional changes that shift the mean phenotype along the branches of a phylogenetic tree, and evolvability changes that alter a clade’s ability to explore its trait-space. In mammals, we find that both processes make substantial independent contributions to explaining macroevolution, and are rarely linked. ‘Watershed’ moments of increased evolvability greatly outnumber reductions in evolutionary potentials, and large or abrupt phenotypic shifts are explicable statistically as biased random walks, allowing macroevolutionary theory to engage with the language and concepts of gradualist microevolution. Our findings recast macroevolutionary phenomena, illustrating the necessity of accounting for a variety of evolutionary processes simultaneously. Pagel, M., O’Donovan, C. & Meade, A. General statistical model shows that macroevolutionary patterns and processes are consistent with Darwinian gradualism. Read the description and then read this reference. The dishonesty and desperation of evolutionary biologists is truly amazing
Really how. The biologist was lying about the fossil record and I brought a mainstream paper on evolutionary biology which admitted the exact problem with the fossil record that I was arguing for. The deception of the Evolutionary biologist was explicitly and clearly exposed. Now if you or another evolutionist can grow a spine I would be more than happy to debate you on this topic. But if you are too spineless to do that feel free to whine in the comments but I wont indulge your whining
Macroevolution posed difficulties for Darwin and later theorists because species’ phenotypes frequently change abruptly, or experience long periods of stasis, both counter to the theory of incremental change or gradualism. We introduce a statistical model that accommodates this uneven evolutionary landscape by estimating two kinds of historical change: directional changes that shift the mean phenotype along the branches of a phylogenetic tree, and evolvability changes that alter a clade’s ability to explore its trait-space. In mammals, we find that both processes make substantial independent contributions to explaining macroevolution, and are rarely linked. ‘Watershed’ moments of increased evolvability greatly outnumber reductions in evolutionary potentials, and large or abrupt phenotypic shifts are explicable statistically as biased random walks, allowing macroevolutionary theory to engage with the language and concepts of gradualist microevolution. Our findings recast macroevolutionary phenomena, illustrating the necessity of accounting for a variety of evolutionary processes simultaneously.
Pagel, M., O’Donovan, C. & Meade, A. General statistical model shows that macroevolutionary patterns and processes are consistent with Darwinian gradualism.
Read the description and then read this reference. The dishonesty and desperation of evolutionary biologists is truly amazing
You got embarrassed
Really how. The biologist was lying about the fossil record and I brought a mainstream paper on evolutionary biology which admitted the exact problem with the fossil record that I was arguing for. The deception of the Evolutionary biologist was explicitly and clearly exposed.
Now if you or another evolutionist can grow a spine I would be more than happy to debate you on this topic. But if you are too spineless to do that feel free to whine in the comments but I wont indulge your whining