Sample tree data from the Swedish National Forest Inventory
SND-ID: 2024-639. Version: 1. DOI: https://doi.org/10.5878/k65t-qb32
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Creator/Principal investigator(s)
Jonas Fridman
- Swedish University of Agricultural Sciences, Department of Forest Resource Management
Anna-Lena Axelsson
- Swedish University of Agricultural Sciences, Department of forest resource management
Research principal
Swedish University of Agricultural Sciences
- Department of forest resource management
Principal's reference number
SLU.srh.2023.4.1-30
Description
The data set include a list of sample trees ≥10 cm DBH from the Swedish National Forest Inventory. Individual sample trees measured and cored within a ten metre wide transect during the 1923-1929 survey or circular sample plots during the 1953-1962, 1983-1992, and 2013-2022 surveys are included. The 10 cm threshold was used to exclude smaller diameter trees measured on small parts of sections or plots. Variables include cluster and plot ID, tree species, diameter, tree age at breast height and total tree age, land-cover class and expansion factors for estimation of number of trees and volumes. The current NFI is based on an annual sample of about 20,000 circular plots, grouped into clusters, of which about 12,000 are surveyed in the field each year. Data for additional sample trees and more variables for individual sample trees can be obtained from the Swedish National Forest Inventory. More details are presented in the article, see
Jacobsson, Jonas, Fridman, Jonas, Axelsson, Anna-Lena, Milberg, Per (2025). An aging population? A century of change among Swedish forest trees. Forest Ecology a
Jacobsson, Jonas, Fridman, Jonas, Axelsson, Anna-Lena, Milberg, Per (2025). An aging population? A century of change among Swedish forest trees. Forest Ecology and Management. 580:122509. https://doi.org/10.1016/j.foreco.2025.122509
The data file contains 17 columns and 384790 rows. Show less..
Data contains personal data
Yes
Type of personal data
Plot numbers that can be connected to geographical coordinates (scrambled) which can point out privately owned land
Language
Time period(s) investigated
1923 – 2022
Biobank is connected to the study
This study has used existing samples from a scientific collection or biobank
Scientific collection or biobank name: SLU Riksskogstaxeringen
Type(s) of sample: Data from sample trees
Species and taxons
Magnoliopsida
Pinopsida
Pinus sylvestris
Picea abies
Plantae
Quercus petraea (matt.) liebl.
- Mode of collection: Field observation
- Description of the mode of collection: The Swedish National Forest Inventory
- Time period(s) for data collection: 1923 – 2022
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Data collector:
Swedish University of Agricultural Sciences
- Sample: Sample trees
- Source of the data: Biological samples
Geographic spread
Geographic location: Sweden
Geographic description: Data from all tree covered areas in Sweden that have been inventoried by the Swedish National Forest Inventory. For more information about the division into regions, see the attached documentation and published article.
Responsible department/unit
Department of forest resource management
Research area
Botany (Standard för svensk indelning av forskningsämnen 2011)
Ecology (Standard för svensk indelning av forskningsämnen 2011)
Forest science (Standard för svensk indelning av forskningsämnen 2011)
Keywords
Tree rings, Broad-leaved tree, Conifers, Tree species, Tree age, 20th century, Tree size, Sweden, Nfi
Jacobsson, Jonas, Fridman, Jonas, Axelsson, Anna-Lena, Milberg, Per (2025). An aging population? A century of change among Swedish forest trees. Forest Ecology and Management. 580:122509. https://doi.org/10.1016/j.foreco.2025.122509
DOI:
https://doi.org/10.1016/j.foreco.2025.122509
