This Trugman_readme20180808.txt file was generated on 20180808 by Anna T Trugman Links to Publication Field updated 20211209 DN ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Supplementary data for ‘Tree carbon allocation explains forest drought-kill and recovery patterns'. 2. Author Information Principal Investigator Contact Information Name: Trugman, Anna Institution: University of Utah Address: Department of Biology, University of Utah, Salt Lake City, UT 84112 Email: a.trugman@utah.edu Alternate Contact Information Name: Anderegg, William Institution: University of Utah Address: Department of Biology, University of Utah, Salt Lake City, UT 84112 Email: anderegg@utah.edu 3. Date of data collection (single date, range, approximate date) 4. Geographic location of data collection (where was data collected?): Model output data 5. Information about funding sources that supported the collection of the data: The authors acknowledge support from the USDA National Institute of Food and Agriculture Postdoctoral Research Fellowship Grant No. 2017-07164 to A.T.T. W.R.L.A. was supported in part by National Science Foundation Grant No. 1714972 and the USDA National Institute of Food and Agriculture, Agricultural and Food Research Initiative Competitive Programme, Ecosystem Services and Agro-ecosystem Management, Grant No. 2017-05521. D.M. acknowledges support from the US Department of Energy, Office of Science, Office of Biological and Environmental Research, Terrestrial Ecosystem Science (TES) Program under award number DE-SC0014363 and National Science Foundation award 1151102. C.S. was supported in part by NSF DEB EF-1340270. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: Please acknowledge the use of this data in any publications. This data is provided as is without any express or implied warranties whatsoever. 2. Links to publications that cite or use the data: Trugman, A.T., Detto, M., Bartlett, M.K., Medvigy, D., Anderegg, W.R.L., Schwalm, C., Schaffer, B. and Pacala, S.W. (2018), Tree carbon allocation explains forest drought-kill and recovery patterns. Ecol Lett, 21: 1552-1560. https://doi.org/10.1111/ele.13136 3. Links to other publicly accessible locations of the data: 4. Links/relationships to ancillary data sets: 5. Was data derived from another source? If yes, list source(s): All date was derived from a plant physiological model detailed in the published article ‘Tree carbon allocation explains forest drought-kill and recovery patterns’ in Ecology Letters. Published model codes are available as a supplement with the main text 6. Recommended citation for the data: Trugman AT, M Detto, MK Bartlett, D Medvigy, WRL Anderegg, C Schwalm, B Schaffer, SW Pacala (2018). Tree carbon allocation explains forest drought-kill and recovery patterns. The Hive: University of Utah Research Data Repository. Please acknowledge the use of this data in any publications. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: XylemLossThresholds_NSC.mat Short description: Xylem damage thresholds from model simulations corresponding to Figure 4a-b in the published article. Xylem damage thresholds are in fraction of functional xylem for a range of tree sizes (duh), soil water potentials, vapor pressure deficit, and atmospheric CO2 concentrations. B. Filename: VPD1300psis0.5C400_OptNSC.csv Short description: Recovery time map that varies with tree size and xylem damage from model simulations corresponding to Figure 4c in the published article for trees recovering under anticipated environmental conditions. Recovery time is in months. C. Filename: VPD1430psis0.5C400_NonOptNSC.csv Short description: Recovery time map that varies with tree size and xylem damage from model simulations corresponding to Figure 4d in the published article for trees recovering under drier than anticipated environmental conditions. Recovery time is in months. 2. Relationship between files: This folder contains Xylem damage thresholds and xylem recovery time maps for different environmental conditions corresponding to the following publication: Trugman AT, M Detto, MK Bartlett, D Medvigy, WRL Anderegg, C Schwalm, B Schaffer, SW Pacala (2018). Tree carbon allocation explains forest drought-kill and recovery patterns. Ecology Letters. 3. Additional related data collected that was not included in the current data package: NA 4. Are there multiple versions of the dataset? no -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: These data were generated assuming that a tree begins the drought recovery period with nonreversible xylem damage and is deficient in functional xylem biomass relative to a healthy tree allometry. Given that leaf biomass is more flexible than structural woody biomass in trees, and that leaf abscission has been observed during and post drought in response to severe water limitation (Carnicer et al. 2011), we allowed drought-damaged trees to immediately abscess excess leaves to maximize instantaneous carbon gain at their given level of functional xylem. We also assume that NSC stores contained enough carbon to replace the fine roots and leaves for a tree with a healthy allometry twice over. A system of biomass equations (see below reference) was then solved numerically until xylem and leaf area were fully recovered. Under the above defined drought recovery framework, carbon biomass trajectories were dependent on tree size and time. Using this recovery framework, we examined whole plant photosynthesis as a function of tree leaf area, functional xylem, and environmental conditions for both optimally allocating trees and tree recovering under non-optimal conditions. Finally, we defined the ‘xylem damage threshold’ (the xylem damage below which a tree is negative carbon balance and cannot recover) and looked the its sensitivity to soil water, CO2, and vapor pressure deficit (VPD). All methods are described in: Trugman AT, M Detto, MK Bartlett, D Medvigy, WRL Anderegg, C Schwalm, B Schaffer, SW Pacala (2018). Tree carbon allocation explains forest drought-kill and recovery patterns. Ecology Letters. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: XylemLossThresholds_NSC.mat ----------------------------------------- 1. Number of variables: 5 (co2, D0, dbh, psis0, recovery_matrix) 2. Number of cases/rows: dbh (1), psis0 (5), D0 (7), co2 (10), recovery_matrix (1 x 5 x 7 x 10) 3. Variable List A. Name: dbh Description: Tree diameter at breast height (metric for size in cm) B. Name: psis0 Description: Soil water potential (MPa) C. Name: D0 Description: Atmospheric vapor pressure deficit (Pa) D. Name: co2 Description: CO2 concentration (ppm) E. Name: recovery_matrix Description: Xylem damage threshold (fraction of functional xylem) for given dbh, psis0, D0, and co2 ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: VPD1300psis0.5C400_OptNSC.csv and VPD1430psis0.5C400_NonOptNSC.csv ----------------------------------------- 1. Number of variables: 1 2. Number of cases/rows: 31x31 3. Variable List A. Name: recovery_time Description: Tree xylem recovery time (months) for tree size (dbh in cm) ranging from 10 to 40 cm at 1 cm increments and fraction remaining xylem ranging from 0.3 to 0.9 at fraction damage increments of 0.02. 4. Missing data codes: Code/symbol -999 (code for no recovery)