Sorry, the research was done long before Al Gore Jr.'s invention. I only know about it because of a briefing I got when I worked at Pt Mugu back in 1984.
Scooping the mud out of a tidal creek created a lagoon with interesting changes in salinity. The various species sense the changing salinity, and are only active when favorable (for them) salinity is in their area. That causes them to self segregate during mating, strenthening the salinity selection characteristic.
That is one of the best evidences I have ever heard of punctuated equilibrium, as that variant of the evolutionary theory is called.
Thanks. Even knowing it's pre-internet gives me a timeline to work with.