when i first saw it i thought "vertical", and did something similar to what Prikshatk suggested. Although if you wanted to highlight the mushrooms, why not selective colouring? I used a gradient map conversion to black and white (i am hooked on the tonal control you can get doing it that way), and then burned some more detail in to the log and lessened the "glare" of the leaves in the water.. Also the crop factor is 3:2 rather than the 4:3 i think you have - mainly to accentuate the "vertical" aspect of it, but also for compositional thoughts behind my presentation.

Those leaves, as i think were mentioned, provide an unwanted distraction - there is nothing wrong with getting a stick and flicking them out of the way ;)

I think it is one of those shots where the intent was definitely there, and as you said it was an "i'll deal with it later" decision.  I find that sometimes something catches your eye about a scene, but the way in which maybe your subconscious is telling you should be the way to present it isnt apparent at the time you shot it. My version above is what i see in the image, but that could be completely different from what you wanted to present... it is what you see in the image and present which is what makes it your photo.

Also f/5.6 - i'm not sure about your specific camera lens, but as far as i have read and seen, f/8 is the generic sweet spot for image quality, you seem to have had enough light (you are shooting at 1/250sec) to use f/8 on this scene, and thus capture more detail.  The difference is slight, but if you want to crop shots then it does make a difference.

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography