Contribution of tree community structure to forest productivity across a thermal gradient in eastern Asia

These CSV and R script files are the dataset and codes used for the analysis in the following journal paper:

Kohyama, T.I., Sheil, D., Sun, IF. et al. Contribution of tree community structure to forest productivity across a thermal gradient in eastern Asia. Nat Commun 14, 1113 (2023). https://doi.org/10.1038/s41467-023-36671-1

Contents

• d0.csv — Individual tree-stem size data obtained by two censuses in 60 forest plots in eastern Asia
  • plot_id — Plot ID
  • species — Scientific name
  • t1 — Year of the first census
  • t2 — Year of the second census
  • dbh1 — Stem diameter (cm) at the first census*¹
  • dbh2 — Stem diameter (cm) at the second census*¹
  • w1 — Estimated above ground biomass (Mg C ha⁻¹) at the first census
  • w2 — Estimated above ground biomass (Mg C ha⁻¹) at the first census
  • wl1 — Estimated leaf biomass (Mg C ha⁻¹) at the first census
  • wl2 — Estimated leaf biomass (Mg C ha⁻¹) at the second census

• d1.csv — Species-level biomass, productivity and other turnover rates in each of 60 forest plots in eastern Asia
  • plot_id — Plot ID
  • t1 — Year of the first census
  • t2 — Year of the second census
  • species — Scientific name
  • N — Period mean number of stems (ha⁻¹)
  • B — Period mean above ground biomass (Mg C ha⁻¹)
  • Bl — Period mean leaf biomass (Mg C ha⁻¹)
  • p — Relative above ground biomass productivity rate (year⁻¹)
  • l — Relative above ground biomass loss rate (year⁻¹)
  • P — Absolute above ground biomass productivity rate (Mg C ha⁻¹ year⁻¹)
  • L — Absolute above ground biomass loss rate (Mg C ha⁻¹ year⁻¹)
  • pl — Relative leaf biomass productivity rate (year⁻¹)
  • ll — Relative leaf biomass loss rate (year⁻¹)
  • Pl — Absolute leaf biomass productivity rate (Mg C ha⁻¹ year⁻¹)
  • Ll — Absolute leaf biomass loss rate (Mg C ha⁻¹ year⁻¹)
  • w_max — Period mean above ground biomass of the largest tree (Mg C ha⁻¹)
  • w_99 — The 99-th percentaile of tree above ground biomass (Mg C ha⁻¹)
  • rgr_max — Relative growth rate of the largest tree (year⁻¹)

• plot_metadata.csv — Metadata (e.g. location and climate variables) for 60 forest plots in eastern Asia
  • plot_id — Plot ID
  • latitude — Latitude in decimal degrees (°)
  • longitude — Longitude in decimal degrees (°)
  • elevation — Elevation (m)
  • area — Plot area (ha)
  • MAT — Mean annual temperature (°C)*²
  • AP — Annual precipitation (mm year⁻¹)*²
  • PET — Potential evapotranspiration (mm year⁻¹)*²

• annual_litterfall.csv — Annual fine litterfall (i.e. canopy productivity) obtained by monthly litterfall records collected by litter traps during same census period in 22 forest plots
  • plot_id — Plot ID
  • Plitter — Annual litterfall production (Mg C ha⁻¹ year⁻¹)

• max_tree_height.csv — Tallest tree height for 388 species in 11 forest plots
  • plot_id — Plot ID
  • species — Scientific name
  • H_max — tallest tree height (m)

• productivity.r — R script for estimating forest-level aboveground net productivity

*¹ No-record diameters due to death in the second census and pre-recruitment in the first census were set to zero.

*² Climate data for the period 1981–2010 were obtained from CHELSA version 2.1 (Krager et al. 2021 EnviDat, https://doi.org/10.16904/envidat.228.v2.1)