LTER Zöbelboden, Austria, Permanent Monitoring Plots, Forest inventory and tree biomass data 1993 – 2019

Forest inventories were conducted in 1993, 2005, 2010, 2014 and 2019 at the permanent monitoring plots covering the LTER Zöbelboden. At the first inventory, the spatial position of each tree was recorded. Between 2005-2010, each tree was tagged with metal plates. During each inventory, tree species, tree vitality status, diameter at breast height (dbh = 1.37 m) (tree caliper) and tree height (Vertex III/G, Haglöf, ) was surveyed. Tree biomass was calculated by species- and tree compartment-specific volume and biomass functions (Zianis et al. 2005; Muukkonen and Mäkipää 2006; Alberti et al. 2005) applied to the tree metrics dbh and tree height. Estimated stem wood volume at field-moist status was converted to biomass at dry weight by multiplying stem volume with species-specific shrinking ratios and species-specific average wood densities (Ö NORM B 3012 2003). For more detailed information on the volume and biomass functions used, please contact the contact persons.