I really love the two photos!
However, I find them to have a powerful and mysterious, almost creepy feel to them, rather than low key. Makes me think of fairy tales from Norway about trolls and particularly Nøkken (The Neck; Fi:Näkki), who lured women and children to drown in lakes.
I like the square framing, and the inclusion of much sky and lake, and with the tree-line tapering to the centre. (The squareness also makes me think of CD/LP cover art, particularly some of the Black Metal art that I've been exposed to over the years growing up in Norway).
Not sure that was the feel you were aiming at, but that's what I initially got from the photos =)
I think including either more or none of the straw in the upper photo would be nice. In the second, I find the clear sky on the right to be a bit too bright, and takes away some of the mystique/attention from the photo. Also, I'm guessing the haze/mist would have intensified later on - making for an even more mysterious photo?
Please post more nature scenes