What I'm looking for: Artists who work with media that doesn't last, eg food, sand, water-based paint outside, ice etc. What I'm actually interested in is their motivation for doing so and how it influences their ideas/themes etc, but at the moment I just need to find examples.
Have you been to an exhibition that had a fixed lifespan (not because it was then closing/moving, but because the objects on display would be destroyed at that time, either by nature or by their creator)?
At this point my research is pretty broad, so if it relates at all that's great.
Searches done: many variations on Art & decay; impermenant art; sand art; mandalas; ice sculpture; temporary exhibitions etc
EDIT: Guys, you and this comm are wonderful. You've given me so many fantastic ideas for directions to explore :D