The document discusses a study on the interference of American beech with the regeneration of red maple and sugar maple in forests. The study examined seed and root sprout production from 2004-2010 and 2011-2015 in plots under continuous beech, plots where beech had been removed, and control plots. It found that beech bark disease and beech's production of root sprouts inhibited the regeneration of the maple species over the study period.