Birch Down in The Pond

Here's one I originally posted in 2007. At the time I commented that birch trees around many Adirondack ponds were becoming less common because they were being felled by Beavers. Beaver population cycles depend somewhat on human activity, and so does the nature of the rain that falls on these ponds. It took decades for government action to begin slowing down the air pollution that causes Acid precipitation, which has changed the chemistry of many Adirondack Ponds, often wiping out fish populations. I wonder if it might also be the reason why that dead paper birch is still lying in Chapel Pond -- nearly unchanged -- almost seven years after I shot this.

Canon 20D; Sigma 18-200 mm.
1/15 sec. @ f/16; ISO 100