Environmental Data: Dataset Article "Species composition shapes canopy...

Description

**Article: "Species Species composition shapes canopy microclimate and foliar traits without modifying photosynthetic thermal acclimation in a beech-oak ec...

Citation

Deluigi, J., Grossiord, C., Poretti, A., Walthert, L., Bachofen, C. (2026). Dataset Article "Species composition shapes canopy microclimate and foliar traits without modifying photosynthetic thermal acclimation in a beech-oak ecotone", Deluigi et al.. EnviDat. https://www.doi.org/10.16904/envidat.747.

Resources

• 6_Soil moisture and temperature Saillon 2023-2024.csv

  #Dataset 6: Soil water potentials Datetime = date and time (CEST) Site = forest site (pure beech, mixture, pure oak) Depth = soil depth (cm) WP_corr = soil water potential corrected by temperature (MPa) Temp = soil temperature (°C) Date = date of measurement (mm/dd/yyyy) Year = year of measurement

  6_Soil moisture and temperature Saillon 2023-2024.csv

• 5_SLA and leaf size measurements Saillon 2023-2024.csv

  #Dataset 5: Physiological traits - specific leaf area and leaf size Year = year of measurement Site = forest site (pure beech, mixture, pure oak) Species = tree species (B = beech, O = downy oak) Tree = tree ID within each site (5 trees per site and tree species) Canopy_level = canopy level (top, bottom) SLA = specific leaf area (cm2 g-1) leaf_size = leaf area (cm2)

  5_SLA and leaf size measurements Saillon 2023-2024.csv

• 4_Physiological measurements Saillon 2023-2024.csv

  #Dataset 4: Physiological traits Year = year of measurement Campaign = campaign of measurement (June, August, September) Site = forest site (pure beech, mixture, pure oak) Species = tree species (B = beech, O = downy oak) Tree = tree ID within each site (5 trees per site and tree species) Canopy_level = canopy level (top, bottom) WP_predawn = leaf water potential at predawn (MPa) WP_midday = leaf water potential at midday (MPa) CHL = chlorophyll content (CCI) Date = date of measurement (mm/dd/yyyy) Aopt = photosynthetic rate at thermal optimum (µmol m-2 s-1) sd_err_Aopt = standard error of Aopt estimates from temperature response curves of photosynthesis b = curvature coefficient of the temperature response curve of photosynthesis sd_err_b = standard error of b estimates from temperature response curves of photosynthesis Topt = thermal optimum of photosynthesis (°C) sd_err_Topt = standard error of Topt estimates from temperature response curves of photosynthesis R25 = respiration rate at a standard temperature of 25°C (µmol m-2 s-1) sd_err_R25 = standard error of R25 estimates from temperature response curves of dark respiration Q10 = thermal sensitivity of respiration (i.e., increase in respiration rates for a 10°C increase in measurement temperature) sd_err_Q10 = standard error of Q10 estimates from temperature response curves of dark respiration Collection_time = time of the day at which the branch was collected (morning, midday)

  4_Physiological measurements Saillon 2023-2024.csv

• 3_Microclimatic measurements day and night Saillon 2023-2024.csv

  #Dataset 3: Microclimatic conditions measured in tree canopies Site = forest site (pure beech, mixture, pure oak) Species = tree species (B = beech, O = downy oak) Tree = tree ID within each site (5 trees per site and tree species) Time = time of the day (HH:MM:SS) Tair_top = air temperature at the top of the canopy (°C) Tair_low = air temperature at the bottom of the canopy (°C) VPD_top = vapor pressure deficit at the top of the canopy (kPa) VPD_low = vapor pressure deficit at the bottom of the canopy (kPa) Tair_gap = air temperature in the clearing (i.e., outside the forest) (°C) VPD_gap = vapor pressure deficit in the clearing (kPa) Tair_T_L = difference in air temperature between the top and bottom of the canopy (°C) VPD_T_L = difference in vapor pressure deficit between the top and bottom of the canopy (kPa) Tair_T_gap = difference in air temperature between the top of the canopy and the clearing (°C) VPD_T_gap = difference in vapor pressure deficit between the top of the canopy and the clearing (kPa) Tair_L_gap = difference in air temperature between the bottom of the canopy and the clearing (°C) VPD_L_gap = difference in vapor pressure deficit between the bottom of the canopy and the clearing (kPa)

  3_Microclimatic measurements day and night Saillon 2023-2024.csv

• 2_Tree size and canopy Saillon 2023-2024.csv

  #Dataset 2: Tree and canopy sizes Year = year of measurement Site = forest site (pure beech, mixture, pure oak) Species = tree species (B = beech, O = downy oak) Tree = tree ID within each site (5 trees per site and tree species) height = tree height (m) DBH = diameter at breast height (cm) sapwood_depth = depth of sapwood from tree cores (cm) sapwood_area = area of sapwood in tree trunks (cm2) Al_As = ratio between branch total leaf area (Al, cm2) and branch section area (As, cm2) from sampled branches WT_LA = canopy total leaf area estimated for each tree using allometric equations (m2) radius_max = average maximum radius of the canopy (m) from two orthogonal measurements radius_east = radius of the canopy (m) measured direction east radius_south = radius of the canopy (m) measured direction south crown_start = height at which the canopy starts (m) canopy_depth = difference between tree height and height at which the canopy starts (m) Asymetric = TRUE/FALSE to indicate whether the canopy was asymetric Direction = direction to which the canopy was asymetric

  2_Tree size and canopy Saillon 2023-2024.csv

• 1_Climatic conditions at the study sites Saillon 2023-2024.csv

  #Dataset 1: Climatic conditions at the study sites Datetime = date and time (CEST) PAR = photosynthetic photon flux density (µmol m-2 s-1) RH = air relative humidity (%) Temp = air temperature (°C) site = forest site (pure beech, mixture, pure oak) and clearing (gap) date = date (mm/dd/yyyy) Precip = rain precipitation (mm) Wind = wind speed (m s-2) Gusts = wind gusts (m s-2) Direction = direction of the wind (°) month = month of the year (1:12) VPD = vapor pressure deficit (kPa) Time = time of the day (HH:MM:SS) Year = year of measurement

  1_Climatic conditions at the study sites Saillon 2023-2024.csv