I guess we have strayed from Utricularia however carnivorous plants and Sphagnum in Hawaii is somewhat related to this topic
I've noticed with the temperatures get to the mid 80's the Alakai Swamp more or less stops growing after putting out a few stunted leaves. I suppose this is summer hibernacula of sorts. Provided the plants survive this phase has lasted around 6 months for me.
Ivan Snyder tells me he hasn't noticed much growth difference between the two populations.