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Boreal forests form the largest and least disturbed forest biome in the northern hemisphere. However, anthropogenic pressure from intensified forest management, eutrophication, and climate change may alter the ecosystem functions of understory vegetation and services boreal forests provide. Swedish forests span long gradients of climate, nitrogen deposition, and management intensity. This makes them ideal to study how the species composition and functions of other, more pristine, boreal forests might change under increased anthropogenic pressure. Moreover, the National Forest Inventory (NFI) has collected systematic data on Swedish forest vegetation since the mid‐20th century. We use this data to quantify changes in vegetation types between two periods, 1953–1962 and 2003–2012. The results show changes in forest understory vegetation since the 1950s at scales not previously documented in the boreal biome. The spatial extent of most vegetation types changed significantly. Shade‐adapted and nutrient‐demanding species (those with high specific leaf area) have become more common at the expense of light‐demanding and nutrient‐conservative (low specific leaf area) species. The cover of ericaceous dwarf shrubs decreased dramatically. These effects were strongest where anthropogenic impacts were greatest, suggesting links to drivers such as nitrogen deposition and land‐use change. These changes may impact ecosystem functions and services via effects on higher trophic levels and faster plant litter decomposition in the expanding vegetation types. This, in turn, may influence nutrient dynamics, and consequently ecosystem productivity and carbon sequestration.

ABSTRACT. In order to understand the use and control of resources by indigenous households and bands, information on territorial division is crucial. However, although indigenous resource use has been quantified in several studies, such information has usually been lacking. A unique map provides this kind of information for the Swedish Sami. Drawn by Jonas Persson Gedda in 1671, before the Swedish state started to interfere with Sami territorial division, it shows the borders of 37 household territories. We have combined the geographical information from Gedda's map with historical sources and modern land survey data to quantify the resources controlled by each household and relate them to taxation. Three crucial resources are identified: alpine heath together with subalpine birch forest, pine-dominated forests, and fishing waters. Only the fishing resource showed any correlation to taxation, which underlines its importance as the main subsistence mode, at least for the forest Sami. Mountain Sami, who lived primarily on reindeer husbandry, controlled abundant alpine heath and subalpine birch forests that were used as summer pastures, but virtually no pine-dominated forests with winter pastures. The necessary winter pastures were located in the territories of the forest Sami, who controlled extensive pine-dominated forests and who were able to combine reindeer herding and wild reindeer hunting.Key words: northern Sweden, Sami, land use, historical maps, archival sources, 17th century, taxation, reindeer herding, reindeer hunting, fishing RÉSUMÉ. Pour comprendre l'utilisation et la gestion des ressources des groupes de peuples indigènes, il est essentiel de disposer d'informations sur la division territoriale. Cependant, si l'utilisation des ressources des peuples indigènes a fait l'objet de plusieurs analyses quantitatives, les informations sur la division territoriale font le plus souvent défaut. Pour les Samis de Suède, une carte unique fournit ce genre d'information. Établie par Jonas Persson Gedda en 1671, avant que l'État suédois n'ait commencé à intervenir dans la division territoriale des Samis, la carte montre les limites de 37 territoires familiaux. Nous avons allié les informations géographiques de la carte de Gedda à des sources historiques et à des données topographiques modernes pour quantifier les ressources contrôlées par chaque famille et les lier au système de taxation. Trois ressources naturelles fondamentales ont ainsi été identifiées : les landes alpines avec les forêts subalpines de bouleau, les pinèdes et les pêcheries. Il appert que seules les pêcheries étaient corrélées au système de taxation, ce qui souligne leur importance en tant que mode de subsistance, pour les Samis de la forêt à tout le moins. Les Samis des montagnes, qui vivaient surtout de l'élevage des rennes, contrôlaient les landes alpines et les forêts subalpines de bouleau abondantes qui étaient utilisées comme pâturages estivaux, mais pratiquement pas de pinèdes offrant des pâturages hivernaux. Les pâturages nécessaires se t...