The data set presents more than 12,000 of about 40,000 trees, which were surveyed during several Russian-German expeditions by the North-Eastern Federal University Yakutsk and the Alfred-Wegener-Institute Potsdam in the North-East of the Russian Federation between the years 2011 and 2021. The purpose was to gather information on trees and forests in this region, which was then used to understand tree line migration, stand infilling and natural disturbance and succession processes and to initialize and validate a forest model. Trees are located on more than 160 vegetation plots, each of which has a size of several hundred square meters. For every tree, height was estimated, and the species recorded. Some individuals were subject to more detailed inventory, including diameters at base and at breast height, crown diameters, and other information. This table partially overlaps with the data set: “Tree data set from forest inventories in north-eastern Siberia - Tree heights.” (doi: 10.1594/PANGAEA.949863), but includes all tree measurements as well as all inventoried trees, which were not included in the Tree heights dataset due to small or lying deadwood.

Variables: The variable Position of tree describes the recording protocol. It has the values PLOT for trees that were surveyed in detail on a square plot, CIRCLEPLOT for trees that were surveyed in detail on a circular plot, PLOTHEIGHT for trees that were surveyed with less detail on a circular plot, and EXTRA for trees that are next to a plot. The variable Species group was derived from the variable Species for further analysis. The variable Growth type has the values T = Tree, K = Krumholz, S = Shrub, M = Multistem, TL = Tree lying. The variable Vitality estimate has the values ++ = very high vitality, + = high vitality, 0 = mediocre vitality, - = low vitality, – = very low vitality. Predicted diameters were derived with allometric formulas from height if they were not explicitly measured. Basal areas and Volume were calculated using the height and diameters or predicted diameters.Exact coordinates (latitude and longitude) were not always recorded for every tree. In that case, refer to the coordinate of the plot.Variables were rounded after calculations.Version 2, 2022-10-24: This version replaces doi: 10.1594/PANGAEA.943522, which contained erroneous species naming.