TSMs_HSMs.csv

Tree-level photosynthetic thermal tolerance, leaf water potentials, thermal safety margins, and hydraulic safety margins measured 3-4 times per tree during the growing season. Variable List: - TreeID: Unique identifier for individual trees   - Species: Tree species - Campaign: Month of the growing season in which data was collected - Heating: Yes or no - RM: Reduced soil moisture, yes or no - Treatment: chamber abiotic treatment (C = control, H = heated, RM = reduced soil moisture, H_RM = heated and reduced soil moisture) - Waterpotential: midday leaf waterpotential (MPa) - WPtlp: Waterpotential at leaf turgor-loss-point (MPa) *Measured by Mas, E., Cochard, H., Deluigi, J., Didion-Gency, M., Martin-StPaul, N., Morcillo, L., Valladares, F., Vilagrosa, A., & Grossiord, C. (2024). Interactions between beech and oak seedlings can modify the effects of hotter droughts and the onset of hydraulic failure. New Phytologist, 241(3), 1021-1034. https://doi.org/https://doi.org/10.1111/nph.19358 - HSM: Hydraulic safety margin (difference between WPtlp and Waterpotential, in MPa) - Tcrit: Critical thermal threshold of Photosystem II (degrees C) - T50: High leaf temperature at which Photosystem II function declines by 50% (degrees C) - Tleaf.max: Maximum leaf temperature during the week preceding thermal tolerance measurement - TSM.min: Minimum leaf thermal safety margin during the week preceeding thermal tolerance measurement (difference between Tcrit and Tleaf.max, in degrees C)