Platon20 -
I have a farm with all my ponds surrounded by forest. I've found it very beneficial to the yoy, predators, my back etc to just drop the tree(s) into the pond. For esthetics I cut the limbs that may be above water level off at or just below the water level.
This is I dropped into the pond '19 when I cleared the view to the pond. IT was leaning 20d over the pond so no way to pull it back - so SPLASH!
tree with the limbs I wanted to cut off - I thought the log would be a turtle sunning spa - nope, geese and wood ducks love it thou...
Another tree I cut late this winter - based on how well the first one was used I decided to drop this one in as well.
Used above and below...
Current - it sank thru the ice as it melted and settled - about 18' deep there. I'll take the Kayak out and trim the little branches off a couple inches below the the water level.
Good luck - A pond does not equal a pool...