Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaNortheastern States Research Cooperative funderUniversity of Maine leadInfluence of Commercial Thinning on Recovery from Defoliation in Spruce-Fir ForestsResearchers sought to determine the impact of commercial thinning practices on defoliation recovery by examining the ability of red spruce and balsam fir to recover from defoliation by storing non-structural carbohydrates (NSC's) used for foliar growth and secondary defensive compounds such as lignins and tannins.Influence of Commercial Thinning on Recovery from Defoliation in Spruce-Fir ForestsDayMichaelLangleyCJdefoliationthinningcarbohydratesred sprucebalsam firSpruce-Fir Tree Response Data2013-01-01Data on tree response to commercial thinningZ1074_Langley_FieldData_5XVMC.1074.2170mySQLDay, M., and CJ Langley. 2017. Spruce-Fir Tree Response Data. University of Maine. FEMC. Can be found at: https://www.uvm.edu/femc/data/archive/project/commercial_thinning_spruce_fir_forests/dataset/spruce-fir-tree-response-datahttps://www.uvm.edu/femc/data/archive/project/commercial_thinning_spruce_fir_forests/dataset/spruce-fir-tree-response-dataBLCLive Crown Base HeightHeight to live crown basedecimal0.1realDBHDBHDiameter at breast heightdecimal0.1realHTTotal HeightHeight to top of treedecimal0.1realLCRLive Crown RatioLive Crown Ratiodecimal0.001realSITESiteSite codetextPRWSPECIESSpeciesSpeciestextFITIS #18032, balsam fir (Abies balsamea)SITIS #18034, red spruce (Picea rubens)TREETree IDTree Identification NumberintTRTTreatmentTreatment codetextTThinnedNUnthinned, Control