I... Don't see the big deal at all. This is something other animals do all the bloody time. Like a bird that gets blown off-course and poops undigested seeds in someplace completely new.
I'd argue that this, is even less of an impact than seeds in birdpoop. It's a sudden and temporary bounty of food that the local creatures will make use of for a limited period of time. It might permanently change around some of the patterns of a few of the cave residents, but otherwise nothing world shattering.