Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaUniversity of Maine leadBaseline Data for Long-term Forest Vegetation Monitoring at Bear Brook Watershed in MaineIn 1987, in response to concerns about the impacts of atmospheric deposition, commonly referred to as “acid rain,” on forest ecosystems, the US Environmental Protection Agency (EPA) provided funds for the establishment of Bear Brook Watershed Research Site, Maine (BBWM), as a Watershed Manipulation Project (WMP) under the National Acid Precipitation Assessment Program (NAPAP). BBWM was established to identify atmospheric deposition impacts on surface waters and to quantify the major processes controlling surface water acidification under increased sulfur (S) and nitrogen (N) atmospheric deposition.Baseline Data for Long-term Forest Vegetation Monitoring at Bear Brook Watershed in MaineFernandezDr. IvanEckhoffJ.D.WiersmaG.B.regenerationacid rainnitrogenwatershedsvegetationforest inventoryNumber of Tree Seeds 1997–98 and 1998–991997-07-011999-08-31Tree seed production indicator: number of tree seeds collected, by species, in both 1997–98 and 1998–99 and normalized tree seed data from the plots at Bear Brook Watershed in Maine.Z1352_2765_FAG2K0VMC.1352.2765mySQLEckhoff and Wiersma (2002) Number of Tree Seeds 1997–98 and 1998–99. FEMC. Available online at: https://www.uvm.edu/femc/data/archive/project/bear-brook-watershed-maine/dataset/number-tree-seeds-199798-199899https://www.uvm.edu/femc/CI4/data/archive/project/bear-brook-watershed-maine/dataset/number-tree-seeds-199798-199899A&Y_(97-98)A&Y_(97-98)decimalA&Y_(98-99)A&Y_(98-99)decimalEast_Bear_(97-98)East_Bear_(97-98)decimalEast_Bear_(98-99)East_Bear_(98-99)intMeasurementMeasurementtextSpeciesSpeciestextAcer pensylvanicumITIS #28754, striped maple (Acer pensylvanicum)Acer rubrumITIS #28728, red maple (Acer rubrum)Acer saccharumITIS #28731, sugar maple (Acer saccharum)Betula alleghaniensisITIS #19481, yellow birch (Betula alleghaniensis)Fagus grandifoliaITIS #19462, American beech (Fagus grandifolia)Picea rubensITIS #18034, red spruce (Picea rubens)UnknownITIS #823, (Radiocystis )Acer pensylvanicumITIS #28754, striped maple (Acer pensylvanicum)Acer rubrumITIS #28728, red maple (Acer rubrum)Acer saccharumITIS #28731, sugar maple (Acer saccharum)Betula alleghaniensisITIS #19481, yellow birch (Betula alleghaniensis)Fagus grandifoliaITIS #19462, American beech (Fagus grandifolia)Picea rubensITIS #18034, red spruce (Picea rubens)West_Bear*_(97-98)West_Bear*_(97-98)decimalWest_Bear*_(98-99)West_Bear*_(98-99)decimal