Sick Tulip Poplar
I apologize for the delay of my response. The loss of bark could be the result of many causes. How did the tree look last year during the growing season? Is it beginning to leaf out now? Has the tree sustained any mechanical damage? See how it does this spring. You may need to have an arborist do an onsite assessment of the tree. I do not make site visits. You can find one at the website of the Georgia Arborist Association at https://georgiaarborist.org/.
Thanks for getting back to me! I did have an arborist take a look. He determined leaves and debris around tree base is inviting insects to invade the thick bark, and woodpeckers are boring after the insects. The tree is budding out nicely, and the damage has been superficial so far. Debris will be cleared away, loose bark removed, and a treatment for the insects will be applied. Hope that will do it!
Just monitor the tree through the growing season.