Copyright is about ownership, not attribution.
Basically, if you don't own it, you're not allowed to "borrow" it and post it where ever you please on the Internet. (poor netiquette)
James Goggin put the copyright notice on the image in an effort to
deter people from doing what you have just done.
TPF also has a rule prohibiting posting photos you don't oen the copyright to,
to protect them from copyright infringement lawsuits, because they are a commercial enterprise and are making monet from advertising here at TPF. It's the 3rd rule down at this link to TPF's rules and Regs:↓ ↓ ↓ ↓ ↓
The Photo Forum - Photography Discussion Forum - FAQ
Which is why benlonghair recommended a link to the image rather than showing everyone you broke the rules.
It is not an HDR. It has been post processed using standard image editing techniques, particularly dodging and burning.