Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaTree Phenology Monitoring: Bud developmentDetermine the relationship between the timing of bud development at different levels in the canopy (upper, lower and regeneration).Establish a baseline for the timing and duration of bud development on hardwood trees. Annual measurements of tree phenology to establish the timing of developmental events and trends, especially as they relate to changes in weather or insect and disease occurrence.Tree Phenology Monitoring: Bud developmentHalmanJoshuaJohnsonMichaelSimmonsTomWilmotSandraLawsonSeanDillnerDanclimate changeplant phenologyforest disturbancecanopiestreesFirst Occurrence Day of Year For Sugar Maple for 1991-20091991-04-012009-05-30Measurement of sugar maple canopy stages at Maple Research CenterDetermine the relationship between the timing of bud development at different levels in the canopy and establish a baseline for the timing and duration of bud development on hardwood trees.Z0013_firstOccurrenceDatesVMC.13.252mySQLJoshua Halman, S. Wilmot. 2009. First Occurrence Day of Year For Sugar Maple for 1991-2009. VT Department of Forests, Parks and Recreation. Can be found at: https://www.uvm.edu/femc/data/archive/project/tree-phenology-monitoring-bud-development/dataset/first-occurrence-day-year-for-sugarhttps://www.uvm.edu/femc/CI4/data/archive/project/tree-phenology-monitoring-bud-development/dataset/first-occurrence-day-year-for-sugarYearYearYear that data was collecteddatetimeYYYYSpecies (Spp)Species nameLatin (scientific) name of the speciestextSiteElevationElevation of sampling siteintfoot100realDateSample DateDate when sample was collecteddatetimeYYYY-MM-DDDay of Year (DOY)Day of YearDay of the yeardatetimeotherUpper Canopy DevelopUpper Canopy DevelopmentUpper Canopy Development average of 5 treesdecimal0bud dormancy1initial bud swell, initial lengthening2bud elongation, buds grow fatter and more green3buds in green stage, scales separating4bud break, leaf tips exposed5extended bud break6initial leaf emergence 7initial leaf expansion, leaves unfolding, wrinkled8full leaf expansion, flattended surface without wrinkles, may not be full sizeLower Canopy DevelopLower Canopy DevelopmentLower Canopy Developmental Stage average of 5 treesdecimal0bud dormancy1initial bud swell, initial lengthening2bud elongation, buds grow fatter and more green3buds in green stage, scales separating4bud break, leaf tips exposed5extended bud break6initial leaf emergence 7initial leaf expansion, leaves unfolding, wrinkled8full leaf expansion, flattended surface without wrinkles, may not be full sizeRegeneration DevelopRegeneration Development AverageRegeneration Developmental Stage average of 5 saplingsdecimal1initial bud swell, initial lengthening2bud elongation, buds grow fatter and more green3buds in green stage, scales separating4bud break, leaf tips exposed5extended bud break6initial leaf emergence 7initial leaf expansion, leaves unfolding, wrinkled8full leaf expansion, flattended surface without wrinkles, may not be full sizeAverage DevelopmentaAverage Developmental StageAverage Developmental Stage of all levels and treesdecimal