My pond level has dropped ~ 18" with the dry weather recently allowing me to run the tractor and shredder around the banks. How much should I shred?

On one hand I want to beat back the vegitation to control growth and make fishing easier this fall/winter but don't want to ruin the habitat when the level comes back up. Literally tens of thousands of frogs are living around the banks and currently the bass fishing is fantastic.

Is this a non issue since the weeds are going to grow back anyway?