Predators that rely on stealth will struggle, as will prey that relies on hiding. They will need to adapt their behavior, but it's hard to say how successful they will be.
- Many snakes will be in trouble, as they wait for prey to wander into striking range. This is not going to happen much when their glow is visible from meters away. Hunger will drive them to start chasing prey, but even if they follow the prey back to its nest or burrow, they're unlikely to catch anything.
- Eagles and such will thrive, since their prey is now even easier to spot.
- Wolves won't notice much. They track prey by smell, not sight. They don't care about being seen either, since their m.o. is to chase and exhaust the prey.
menu items prey animals, ground-nesting birds will be in the most trouble. After a disastrous breeding season or two, they'll be nearing extinction. In fact, many animals rely on camouflage for protecting their young and will have to find safer places for to keep their young until they can outrun/fly/fight predators.
In summary: diversity will go down a bit, some predators will have a short peak in numbers while they hunt the easy prey to (local) extinction, then fall back from starvation. I don't know of any ecosystems where hiding is the primary strategy for the bulk of the animals, so it's unlikely that there are any total collapses.