i agree with priteeboy, tough maybe brown-murky, here in finland theres many swamps and you got the scene very much like one, except for the water. Once I saw a place that the water looked like brown water with a thin coat of "monster blood" green substance at the top.
and i love the glow! i need to figure how to make my images glow like that!
Looks pretty good overall, the moss on the trees was an excellent addition for the theme. I just think the water doesn't fit. Looks like beach water because of how clear and disturbed it is. Swamp water would be much more calm, with little to no bump at all, and a murky dark green in colour. I think a water change would make it much more realistic