TSMs_HSMs.csv

Beschreibung

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)