Data from: Trade-offs in the multi-use potential of managed boreal forests

1. Implementing multi-use forest management to account for both commercial and non-commercial ecosystem services is gaining increased global recognition. Despite its spatial extent, and great economic and ecological values, few studies have evaluated the boreal forest and its management to assess the potential for simultaneous delivery of a suite of ecosystem services. 2. Using data from a Swedish long-term experiment this study explores how biodiversity of the ground vegetation and potential delivery of multiple ecosystem services (timber production, carbon (C) storage and non-timber forest products) are influenced by two common silvicultural practices (thinning, fertilization and their interaction). 3. Diversity (diversity indices and species richness) of the ground vegetation was higher in thinned than in unthinned forest, something partly explained by six species of lichens that only occurred in thinned forest. In addition, supply of lichens for reindeer forage was three times higher in thinned forest. Fertilization negatively affected the lingonberry shrub (Vaccinium vitis-idaea). Timber production increased with fertilization, but decreased with thinning. The potential for C storage was highest in fertilized forests, which, apart from having the highest timber production, also supported the highest standing tree biomass. 4. The silvicultural practices evaluated induced trade-offs among the ecosystem features studied as thinning increased biodiversity of the ground vegetation, production potential of wild berries and lichens, but reduced timber production and the forest's potential for C storage. Fertilization, had the opposite effect, promoting the potential for C storage at the expense of biodiversity and the ecosystem services delivered by the ground vegetation. 5. Synthesis and applications. Silvicultural practice had a pronounced effect on the multi-use output, and trade-offs among values were common. Nevertheless, our study demonstrates that silvicultural practices that are currently adopted in Sweden can be used to adjust the multi-use potential output of forests, suggesting that commonly used practices can be applied to maintain, or even increase the multi-use potential of the boreal forest biome, if management objectives are allowed to vary across the landscape. A prerequisite for this is site specific management objectives that clearly determine the desired output.Production potential of non-timber forest productsDry weight biomass of berry producing dwarf shrubs (V. myrtillus and V. vitis-idaea) and ground living lichens (utilized by reindeers during winter) in five treatments. Lichen data are from sites located in the counties currently utilized as winter grazing areas (site 895 and sites located north of site 895). Treatments were: Thinning (Th), No thinning (NoTh), Nitrogen fertilization (N), thinning+ nitrogen fertilization (Th+N), and Thiining + N and P fertilization (Th+N+P).Biomass_NTFPs.txtComposition and richness of the ground vegetationData presented is based on point-intercept data from field surveys of the ground vegetation. Compositional data is presented for the 10 most abundant species of the ground vegetation. Richness data, diversity indices and their corresponding evenness measures are based on all species. Besides data related to the species the file contain information on site id, latitude of the experimental sites, treatment, time (years) since last thinning operation and latitude (degrees) north of the southernmost site. Treatments were: Thinning (Th), No thinning (NoTh), Nitrogen fertilization (N), Thinning+ nitrogen fertilization (Th+N), and Thinning+N and P fertilization (Th+N+P).Point_intercept data ground vegetation.txtStanding biomass of trees and ground vegetationData presented is standing biomass (above- and belowground) of trees (Scots Pine, Pinus sylvestris) and the ground vegetation. Tree biomass data is derived from stem diameter (at 1.3 m) and tree height using Marklund (1988) biomass functions. Aboveground biomass of ground vegetation is derived from biomass harvest of all aboveground parts of the vegetation in subplots. Belowground biomass was estimate based on published ratios (Nordin et a. 1998). Total biomass refers to the combined biomass of tree and ground vegetation. Besides data related to the species the file contain information on site id, latitude of the experimental sites, treatment, time (years) since last thinning operation and latitude (degrees) north of the southernmost site. Treatments were: Thinning (Th), No thinning (NoTh), Nitrogen fertilization (N), Thinning+ nitrogen fertilization (Th+N), and Thinning+N and P fertilization (Th+N+P).Standing biomass (total trees forestfloor).txtTimber productionData presented is increase in stem growth of Scots Pine (Pinus sylvestris) between repeated measurements of stem diameter. Production is expressed as stem volume increment (m3) per ha over the experimental period. Besides data on timber production the file contain data on site id, latitude of the experimental sites, treatment, time (years) since last thinning operation and latitude (degrees) north of the southernmost site. Treatments were: Thinning (Th), No thinning (NoTh), Nitrogen fertilization (N), Thinning+ nitrogen fertilization (Th+N), and Thinning+N and P fertilization (Th+N+P).Tree volume increment.tx