At the University of Minnesota Cloquet Forestry Center, Nick LaBonte scanned the branches for bunches of cones hiding among the needles. …LaBonte was not seeking the cones themselves, but rather the precious cargo they protect inside — tiny seeds. …It was all part of a tree seed collection workshop — one of three hosted across the state by the University of Minnesota Extension, to train about 100 people in how to find and collect tree seeds. The sessions are part of a larger effort aimed at addressing a crucial shortfall in the state’s reforestation efforts — there aren’t enough seeds, nor the people to collect them, to grow the trees needed in a changing climate. Minnesota boasts about 17 million acres of forest. But those forests are changing. They’re stressed by disease, insects, drought and warming temperatures. Seed supply is a key ingredient for land managers to be able to maintain productive forests.