Counting marmots…
Knowledge graph centered on ecological speciation with 70 nodes and 175 connections. Top connected: Two-form Bumble Bee, Bumble Bees, Buff-tailed Bumble Bee, Yellow-fronted Bumble Bee, Common Eastern Bumble Bee.
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.