It depends on how much timber was removed. Often if it is selective cutting the canopy will open up a bit and the ginseng will get more light. Established older ginseng plants can actually thrive with a bit more light and the roots and plant top will grow larger and faster than it had prior to the selective cut. However, I can assure you when the canopy is opened up to much and the sun hits the forest floor with high intensity the ginseng may go dormant. However when it tries to come up each year it gets burnt and cannot recover and will eventually utilize all of the stored energy in the root. It will simply stop coming up in the spring and I suspect it can only attempt to do this for 3 to 4 years max. I had a my second best spot of all times get logged and the canopy went from 85 % to 40%. None of the thousands of wild seed that I planted there from the hundreds of wild sang I found there ever made it. They logged it in the late 80's and it is still open with an understory of Japanese Honeysuckle and other scrub brush. I cannot find any sang in there and I had left plenty of immature ginseng plants that should be 20 years old or older now but they are not there.
Thanks,
Latt