Squad ventured up the Cedar River into the Dorre Don Natural Area with King County Parks. Intrepid volunteers crossed a beautiful side-channel, carrying tools and supplies onto a riverine island. English ivy / Hedera helix is a constant pressure on PNW forests, at this site it has became so mature that hori hori (horticultural) knives were used to saw it.
The thick woody vines compromise tree stability and can eventually cause death. Increased weight from snow, ice and simply rain alone heightens susceptibility to wind damage while also smothering growth and reducing vigor. Seeds can't sprout through the monocultural carpet on the forest floor.
Even once it is pulled out, birds eat the berries and spread the seeds via their droppings, meaning stewardship will always be needed. You can read more about ivy via KC's noxious weed bulletin. We look forward to being part of the solution!