DOI: 10.5061/dryad.dz08kps9x
title: Data from: Diversity in resource use strategies promotes productivity in young planted tree species mixtures

description: This dataset compiles measurements from 21 experimental tree diversity
 sites within the TreeDivNet network across temperate, Mediterranean, and
 tropical biomes on five continents. It includes data on species richness,
 composition, traits (wood density, leaf nitrogen content), functional and
 structural diversity, and stand- and species-level productivity in 1,609
 plots. Net biodiversity effects and their partitioning into selection and
 complementarity effects are also provided. The data can be reused to study
 biodiversity–productivity relationships, trait–function linkages, and
 forest ecosystem functioning across biomes.
description: # Data from: Diversity in resource use strategies promotes productivity in
 young planted tree species mixtures The database contains four main data
 files and this README file, each corresponding to a hypothesis tested in
 the associated article: * README.md * DS1.xlsx * DS2.xlsx * DS3.xlsx *
 DS4.xlsx Missing values are noted as "n/a". #### **File: DS1**
 Plot-level dataset used to address hypothesis 1. | Variable | Description
 | Unit | | --------------------------------- |
 --------------------------------------- | ------------ | | Experiment |
 Experiment ID | - | | Block | Unique block ID | - | | Plot | Unique plot
 ID | - | | Species\_richness | Number of tree species in a plot | - | |
 Species\_composition | Names of species planted in a plot | - | | Biome |
 Biome classification of the experiment | - | | Stand\_productivity |
 Annual basal area increment per plot | m² ha⁻¹ yr⁻¹ | |
 Stand\_productivity\_standardized | Z-score standardized stand
 productivity | - | #### **File: DS2** Plot-level dataset used to address
 hypothesis 2. | Variable | Description | Unit | |
 ----------------------------------- |
 -------------------------------------------- | ---------------- | |
 Experiment | Experiment ID | - | | Block | Unique block ID | - | | Plot |
 Unique plot ID | - | | Species\_richness | Number of tree species in a
 plot | - | | Species\_composition | Names of species planted in a plot | -
 | | FDis\_SLA\_LNC\_WD | Functional dispersion of SLA, LNC, and WD | - | |
 FDis\_SLA\_LNC\_WD\_standardized | Min–max standardized functional
 dispersion | - | | Stand\_productivity | Annual basal area increment per
 plot | m² ha⁻¹ yr⁻¹ | | Stand\_productivity\_standardized | Z-score
 standardized stand productivity | - | | Structural\_diversity | Gini
 coefficient of tree height distribution | Gini coefficient | |
 Structural\_diversity\_standardized | Z-score standardized structural
 diversity | - | #### **File: DS3** Plot-level dataset used to address
 hypothesis 3. | Variable | Description | Unit | | -----------------------
 | --------------------------------------------------------------------- |
 ------------ | | Experiment | Experiment ID | - | | Block | Unique block
 ID | - | | Plot | Unique plot ID | - | | Species\_richness | Number of
 tree species in a plot | - | | Species\_composition | Names of species
 planted in a plot | - | | Selection\_effect | Diversity effect
 attributable to the dominant species | m² ha⁻¹ yr⁻¹ | |
 Complementarity\_effect | Diversity effect attributable to complementarity
 among species | m² ha⁻¹ yr⁻¹ | | Net\_diversity\_effect | Total diversity
 effect (sum of selection and complementarity effects) | m² ha⁻¹ yr⁻¹ | |
 CWM\_WD | Community-weighted mean of wood density | g cm⁻³ | | CWM\_LNC |
 Community-weighted mean of leaf nitrogen concentration | % | |
 CWM\_WD\_standardized | Z-score standardized CWM of wood density | - | |
 CWM\_LNC\_standardized | Z-score standardized CWM of leaf nitrogen
 concentration | - | | FDis\_WD | Functional dispersion of wood density | -
 | | FDis\_LNC | Functional dispersion of leaf nitrogen concentration | - |
 | FDis\_WD\_standardized | Min–max standardized FDis of wood density | - |
 | FDis\_LNC\_standardized | Min–max standardized FDis of leaf nitrogen
 content | - | #### **File: DS4** Species-by-plot dataset used to address
 hypothesis 4. | Variable | Description | Unit | |
 ----------------------------------- |
 ------------------------------------------------- | ------------ | |
 Experiment | Experiment ID | - | | Block | Unique block ID | - | | Plot |
 Unique plot ID | - | | Species | Species name | - | | Species\_richness |
 Number of tree species in a plot | - | | Species\_composition | Names of
 species planted in a plot | - | | Species\_class | Angiosperm or
 gymnosperm | - | | WD | Wood density | g cm⁻³ | | LNC | Leaf nitrogen
 content | % | | WD\_standardized | Z-score standardized wood density | - |
 | LNC\_standardized | Z-score standardized leaf nitrogen content | - | |
 Species\_productivity | Annual basal area increment per species in a plot
 | m² ha⁻¹ yr⁻¹ | | Species\_productivity\_standardized | Z-score
 standardized species-level productivity | - | Each dataset is accompanied
 by a separate metadata sheet describing the variables and units.