Objectives: Our objective for this study was to identify the potential climate and pollution variables that have been best associated with red oak growth in Vermont over the past several decades.
Principal Investigator: Rebecca Stern, Paul Schaberg, Shelly Rayback, Paula Murakami, Christopher Hansen, Gary Hawley
Laboratory: Schaberg/Hawley/Rayback Dendrochronology Collaborative
Recommended Citation: Stern RL, Schaberg PG, Rayback SA, Murakami PF, Hansen CF, Hawley GJ. 2019. Red oak trees cored in western valleys of Vermont.
Project Contents: Data for 11 Plots, 214 Trees, 432 Cores
Project Period: 2014-08-30 to 2020-02-19
Data License: What's this?
Description: We measured tree rings for 213 dominant and codominant red oak trees at 11 VT sites, and statistically compared growth to tree and stand characteristics and regional climate and pollutant deposition data. Because red oak wood is ring-porous, exhibiting a bimodal distribution of vessels, xylem growth can be easily partitioned into earlywood (EW) and latewood (LW) growth as well as whole-ring widths (WRW). Therefore, we evaluated relationships between WRW, LW and EW growth and environmental factors that may influence growth.
- Rebecca L. Stern, Paul G. Schaberg, Shelly A. Rayback, Paula F. Murakami, Christopher F. Hansen, and Gary J. Hawley.2020.Growth of canopy red oak near its northern range limit: current trends, potential drivers, and implications for the future. doi:10.1139/cjfr-2019-0200 View
Taxonomic standard used: Scientific name
How plots were selected: Sites were chosen that would provide a broad representation of mature red oak trees in the northern part of its range. Areas with a known history of management over the past several decades were avoided.
How trees were selected: Approximately 15-20 dominant and co-dominant trees were selected at each site.
Exclusion of trees (if any): Trees with bole or crown damage were excluded.
How cores were collected: Two 5 mm increment cores were extracted from each tree at breast height, 180° from each other, and perpendicular to the slope.
How cores were processed: Increment cores were dried, mounted and sanded using standard methods. Tree rings were visually crossdated using the list method, microscopically measured using a Velmex sliding stage unit and MeasureJ2X software (0.001 mm resolution) followed by the use of COFECHA to detect and correct crossdating errors.
Exclusion of cores (if any): A small number of cores were discarded since they were poorly correlated with the master chronology (i.e., below Pearson critical correlation 99% confidence levels) due to unusual growth trends that were not representative of overall site growth.
Added to the database: 02/05/2020
Last modified: 02/05/2020