Counting marmots…
Knowledge graph centered on ecological speciation with 76 nodes and 169 connections. Top connected: Hummingbird, Bombus, Ipomopsis, Ligusticum porteri, Delphinium.
The formation of new species involves divergence of phenotypes and development of reproductive isolation, where initial divergence results from divergent natural selection and reproductive isolation arises directly or indirectly as a consequence of that selection.