public read Forest Ecosystem Monitoring Cooperative

705 Spear StreetSouth BurlingtonVermont05403United States of America

(802) 656-0683femc@uvm.eduwww.uvm.edu/femcNortheastern States Research Cooperative funderUnited States Department of Agriculture (USDA), Forest Service Northern Research StationleadTree-level data including species, DBH, crown class, vigor, dieback, and defoliation. For description of variables, see: Hallett, R. A., Bailey, S. W., Horsley, S. B., & Robert, P. (2006). Influence of nutrition and stress on sugar maple at a regional scale. Canadian Journal of Forest Research, 36, 2235–2246. Forest Ecosystem Monitoring CooperativeScottBaileyprincipalInvestigatorRobertLongprincipalInvestigatorRichardHallettprincipalInvestigatorStephenHorsleyprincipalInvestigatorCalcium is an important soil nutrient in healthy forests, but interactions with acid rain cause elements, such as aluminum, to interfere with calcium uptake by plants. Calcium-to-aluminum ratio in foliage and soil has been shown to be a predictor of tree health and is used in critical loads assessments to determine impacts of air pollution. Most studies have been done on greenhouse seedlings and have questionable application to mature forests. Another element, manganese, has also been shown to interfere with nutrient uptake. NSRC researchers investigated these ratios in mature forest trees. They measured chemistry of soil, soil water, and foliage of sugar maple, yellow birch, white ash, and black cherry in 56 hardwood forest plots from Pennsylvania to New Hampshire. Researchers assessed tree health by rating tree canopies for dieback, transparency, and overall vigor. They measured stem diameter growth with increment cores.Tree healthTree-level data including species, DBH, crown class, vigor, dieback, and defoliation. For description of variables, see: Hallett, R. A., Bailey, S. W., Horsley, S. B., & Robert, P. (2006). Influence of nutrition and stress on sugar maple at a regional scale. Canadian Journal of Forest Research, 36, 2235–2246. VMC.1094.2258mySQL/femc/data/archive/project/nutrient-vs-toxic-elements-in-forest-soils/dataset/tree-health2003-01-01SppSppSpecies CodestextABAmerican BeechBFBalsam FirBWBasswoodBABig-Tooth AspenBCBlack CherryCTCucumber TreeHEHemlockPBPaper BirchPCPin CherryRMRed MapleRORed OakRPRed PineRSRed SpruceSTStriped MapleSMSugar MapleTATrembling AspenWAWhite AshWOWhite OakWPWhite PineYBYellow BirchCrown_ClassCrown_ClassNo description for this attributeint1Open Grown2Dominant3Codominant4Intermediate5Suppressed/overtoppedVigorVigorNo description for this attributeint1Healthy2Light decline3Moderate decline4Severe decline5Dead, natural6Dead, human caused