Clammers gathering juvenile clams in the Narrows flats on May 7. LUBEC — Lubec shellfish harvesters planted seed clams in the Lawrence’s Factory, Globe Cove and Klondike flats last week with help from Kyle Pepperman of the Downeast Institute.The new beds will require year-round tending and close monitoring for predators and for biofouling from algae and seaweed. The Lubec Shellfish Committee, which monitors, manages and preserves shellfish harve…