I recently moved into a new house and the slope of the yard caused some erosion problems, etc. The landscaper came back and hooked it up, and also put down erosion mat. My question is does the erosion mat eventually erode? I guess what I'm asking is do I have to eventually take this mat up?.......or is it biodegradable and should I just leave it untouched? The landscaper put "spikes" (for lack of a better word) into the ground to hold it down. But just don't know if I'm supposed to eventually pick it up or let nature take it's course.