The neighbor would need to notify by certified mail any concerns about dead trees. Otherwise each is responsible for their own damages.
Once notified, the land owner would be responsible for all of the damages.
As far as the limbs, I am not as certain.
I believe he can limb them up along the property line if desired.
Personally, I would offer to let him pay half for the removal and plant more desirable ornamental trees
Those trees are prone to disease and will have to be removed eventually.
Let him pay half while you can.
Once notified, the land owner would be responsible for all of the damages.
As far as the limbs, I am not as certain.
I believe he can limb them up along the property line if desired.
Personally, I would offer to let him pay half for the removal and plant more desirable ornamental trees
Those trees are prone to disease and will have to be removed eventually.
Let him pay half while you can.