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Phenology and cover of plant growth forms predict herbivore habitat selection in a high latitude ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
The spatial and temporal distribution of forage quality is among the most central factors affecting herbivore habitat
selection. Yet, for high latitude areas, forage quantity has been found to be more important than quality. Studies on large
ungulate foraging patterns are faced with methodological challenges in both assessing animal movements at the scale of
forage distribution, and in assessing ...
Rangifer management controls a climate-sensitive tundra state transition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-04)
Rangifer (caribou/reindeer) management has been suggested to mitigate the temperature-
driven transition of Arctic tundra into a shrubland state, yet how this happens is
uncertain. Here we study this much focused ecosystem state transition in riparian areas, where
palatable willows (Salix) are dominant tall shrubs and highly responsive to climate change. For
the state transition to take place, ...
Transferability of biotic interactions: temporal consistency of arctic plant-rodent relationships is poor
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-17)
Variability in biotic interaction strength is an integral part of food web functioning.
However, the consequences of the spatial and temporal variability of biotic interactions
are poorly known, in particular for predicting species abundance and distribution.
The amplitude of rodent population cycles (i.e., peak-phase abundances) has
been hypothesized to be determined by vegetation properties ...
Rapid, landscape scale responses in riparian tundra vegetation to exclusion of small and large mammalian herbivores
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Productive tundra plant communities composed of a variety of fast growing herbaceous and woody plants are likely to attract mammalian herbivores. Such vegetation is likely to respond to different-sized herbivores more rapidly than currently acknowledged from the tundra. Accentuated by currently changing populations of arctic mammals there is a need to understand impacts of different-sized herbivores ...
The ghost of development past : the impact of economic security policies on Saami pastoral ecosystems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
To ensure economic viability over time, any efforts to meet the Millennium Development
Goals need to reconcile conservation with development interventions. Particularly, in marginal and risk prone areas erosion of resilience could make production systems more susceptible to environmental risks that compromise the economic security. By longitudinal analyses of long-term data records we investigated
the ...
Future changes in the supply of goods and services from natural ecosystems: prospects for the European north
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09)
Humans depend on services provided by ecosystems, and how services are affected by climate change is increasingly
studied. Few studies, however, address changes likely to affect services from seminatural ecosystems. We analyzed ecosystem goods and
services in natural and seminatural systems, specifically how they are expected to change as a result of projected climate change during
the 21st ...
Shedding new light on the diet of Norwegian lemmings: DNA metabarcoding of stomach content
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Lemmings are key herbivores in many arctic food webs, and their population dynamics have major impacts on the functioning of tundra systems. However, current knowledge of lemming diet is limited, hampering evaluation of lemming–vegetation interactions. This lack of knowledge is mainly due to methodological challenges, as previously used microhistological methods result in large proportions of poorly ...
Arctic Small Rodents Have Diverse Diets and Flexible Food Selection
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
The ecology of small rodent food selection is poorly understood, as mammalian herbivore food selection theory has mainly been developed by studying ungulates. Especially, the effect of food availability on food selection in natural habitats where a range of food items are available is unknown. We studied diets and selectivity of grey-sided voles (Myodes rufocanus) and tundra voles (Microtus oeconomus), ...