File_1: dendro_data.txt Dendrochronogical database Column_Name Description TreeID Tree identification SiteID Site identification Species PIMA = Picea mariana and ABBA = Abies balsamea Status Whether tree was dead or alive when sampled Year Ring year DBH Diameter at breast height (1.30 m), in cm BAI Basal area increment, in cm2 per year, calculated from DBH measured when tree was sampled minus ring widths Regime_Shift -1 (declining regime shift in growth), 0 (no regime shift), 1 (increasing regime shift in growth), NA (No data) Regime_Shift_biot -1 (declining regime shift in growth), 0 (no regime shift), 1 (increasing regime shift in growth), NA (No data) File_2:NPP.txt Net Primary Productivity simulations SimulationID Simulation # (1 to 515 forPicea_mariana and 1 to 503 for Abies_balsamea) Year Year of simulation (range 2002-2012) Species Picea_mariana, Abies_balsamea NPP Net Primary Productivity gC m2 ha-1