Bridging the Adaptive landscape:

W. Scott Persons and Philip J. Currie:

"The classic metaphor of the adaptive landscape conceives a hill and valley terrain, where the most beneficial combinations of traits form the tallest peaks (Wright 1932; Simpson 1955). As organisms evolve, they traverse the landscape, with the pressures of natural selection always pushing them uphill. One principle that emerges quickly in light of the metaphor is that lineages are prone to becoming marooned on peaks (Wright 1932; Simpson 1955). That is, the same forces of natural selection that actively drive an evolving lineage to one summit also actively hold the lineage at that local adaptive optimum, regardless of potentially much taller peaks present elsewhere in the landscape. How lineages might overcome such marooning and progress from one adaptive hill to another is a challenging conceptual question and one basic to our understanding of the evolutionary processes."

-----

Der Gedanke ist schon gut: Die sexuelle Selektion drängt da, setzt da etwas in Bewegung: Führt dazu, dass Organismen einen lokalen Gipfel verlassen.