Sadly the first time TPP saw a picture like this was on a bulletin board in a school of forestry and the caption attached said, "Here's what happens when you chain your bike to a tree and come back 10 years later." Of course, trees don't grow that way, and ironically that very week the faculty were debating about reducing the amount of botany forestry students should be required to take. At any rate, this isn't going to turn out well. Straps, chains, cables, or the like simply will not under almost all circumstances help a tree that is prone to splitting. They just aren't strong enough to hold a split trunk in place, and see what is happening? The secondary growth of the tree is in the process of engulfing the chain, incrementally, year by year. This will produce a weak zone in the wood damaging both trunks. Trying to remove the chain may well now rip the bark and cambium producing quite an injury. Why do people do these things? Actually these are pretty vertically oriented trunks and no particular problem was evident that the chain was meant to alleviate. In all likelihood, this preventative measure will cause more real damage and help shorten the longevity of this tree. There are worse things you can do, but this isn't a good practice. And in case you didn't understand, this chain is at exactly the same height off the ground as it was when it was first placed there.
A peculiar limp, pink leaf flush
5 hours ago in The Phytophactor