Maybe all this fuss about disappearing frogs is much ado about nothing. Some amphibian populations have been shown to change wildly from year to year. Few studies have shown a long term decline in amphibian populations. Maybe we don't know enough about how frog populations behave. The chorus frog on Isle Royale, Michigan seems to be a case of a natural local extinction.
Frogs rely heavily on water all through their lives.
Missing or frozen water is bad news. One group of scientists think that a monster frost was responsible for the extinctions of a couple tropical frogs in Brazil. Well maybe not directly but it sure isn't helping. Increasing the temperature of the earth even by a few degrees can change weather patterns and rainfall. Add this stress to other factors and you've got another piece of the puzzle.