A good abstract and shot. Two comments from a viewers perspective: 1) the white spots don't fit the pattern nor blend well with the lovely textures of the wood. 2) I would have liked to see the wood grain better. Maybe via a different contrast/toning adjustment, or maybe by having the natural colors show.
This is a nice shot. I would like to see it in colour. Maybe the differnt colous in the barks, the rings, might have added an extra something to it. But I understand the inclination to go bw for this challenge. Good stuff