I see a fake "fog/flare" effect applied to the upper part. Fake blur added to the lower area. White balance has been warmed up a bit, hues shifted a bit. See the green moss on the tree roots? The original has a fairly natural green hue; the after picture has the typical Photoshop green colors many people see today.
I like the "after" version only because the original is pretty ugly. The fake fog/flare look is huge in the Little Lusker series of Photoshop actions...they have a gazillion options to create fake fog/lens flare/haze/dreamy effects. The faked glare on the pond's surface looks pretty heavy-handed, but then this is his artistic expression, and many people would not be able to spot the fakery and heavy effects, so...