It was Susan Dobson! I knew it!
Here is a blurb I found about her work from the Centre for Contemporary Canadian Art:
“In a later series of photographs, titled Natural Law, I examine the inherent futility of demarcating space: smoke stacks and tree branches vie for attention; a tree obscures a flashy Schneider’s meat billboard, and road kill on a freshly sodden grassy slope suggest that natural selection acts indiscriminately of artificially imposed boundaries. Despite extensive infrastructure, “maintenance free” materials, sturdy fencing, and billboards marking industrial progress, the principle of Natural Law exposes the irony of ownership, as the landscape inevitably surmounts artificially imposed perimeters.” – Susan Dobson
And here is the link to the work on her website.