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The Svalbard rock ptarmigan (Lagopus muta hyperborea) is an endemic subspecies of rock ptarmigan inhabiting the high Arctic archipelagos of Svalbard and Franz Josefs Land. This ptarmigan species exists at low population densities, with little interannual variations in population numbers, and limited habitat for breeding with less than 5 % of the land area(More)
In the high-arctic archipelago of Svalbard, the pink-footed goose (Anser brachyrhynchus) population has increased dramatically over the last decades. The population increase and the corresponding range expansion suggest a substantial increase in the potential for disturbance of the tundra caused by goose herbivory. In this study, we used surveys of(More)
Alpine and arctic tundra regions are likely to retract as a result of climate warming and concerns have been raised over the status of the Rock Ptarmigan (Lagopus muta). In Fennoscandia, the Rock Ptarmigan has low population abundance, and predictions based on harvest statistics show population declines throughout the range. In this study, we used a(More)
Predictable variation in demographic patterns among populations inhabiting extreme environments can be used to direct common management actions. Ptarmigan and other grouse are ecologically important herbivores in Arctic and alpine areas, but survival estimates are lacking for many harvested populations. This hampers more detailed assessment of how this key(More)
The use of hunting statistics for population monitoring has often been criticized because such data are affected by several sources of error. Still, for many harvested populations, hunting statistics are the only available data source and cautious use of such data may be valuable for management. Here we assessed to what extent long-term monitoring of(More)
Shrews (Soricomorpha) are among the most numerous small forest dwelling mammals in boreal forests ecosystems. In Norway large areas of sub-Arctic birch (Betula pubescens) forests have gradually been replaced by non-native spruce (Picea abies) plantations during the last century. This conversion has led to changes in forest floor vegetation and soil(More)
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