they will balance out eventually, nature is amazing that way
Ivie is a rock bowl now not cause of carp but because the grass beds are 200 yards from the water.
if nobody has ever seen them in there isn't a large population... no stockings of them I highly doubt there will be any issues.
that said, is a moot point until the water comes up to the level of the beds
"I'll never mess with bee's or wasp anymore, and I'll never gig another beaver..." Words from a man who learned things the hard way