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Harmonizing circumpolar monitoring of Arctic fox: benefits, opportunities, challenges and recommendations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-16)
The biodiversity working group of the Arctic Council has developed pan-Arctic biodiversity
monitoring plans to improve our ability to detect, understand and report on long-term
change in Arctic biodiversity. The Arctic fox (Vulpes lagopus) was identified as a target of
future monitoring because of its circumpolar distribution, ecological importance and reliance
on Arctic ecosystems. We provide ...
Hidden in the darkness of the Polar night: A first glimpse into winter migration of the Svalbard rock ptarmigan
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-06-05)
Among
many unknown aspects of the Svalbard rock ptarmigan’s biology is whether the birds migrate seasonally within
the Svalbard archipelago. Visual observations in spring and fall have indicated that they could perform long-range
migration, a behaviour that would allow them to track seasonal shifts in suitable feeding areas. However, the movement
patterns and habitat use of the Svalbard rock ...
Changed Arctic-alpine food web interactions under rapid climate warming: implication for ptarmigan research
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-05)
Ptarmigan are herbivorous birds that are year-round residents of alpine and arctic ecosystems — presently subjected to the most rapid climate warming on earth. Yet, compared to other bird taxa there has been little climate impact research on ptarmigan. Ptarmigan population dynamics, in particular in the sub/low-arctic, appears to be strongly influenced by complex interactions with a suite of ...
Red fox takeover of arctic fox breeding den : an observation from Yamal Peninsula, Russia
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Here, we report from the first direct observation of a red fox (Vulpes vulpes) intrusion on an arctic fox (Vulpes lagopus) breeding den from the southern Arctic tundra of Yamal Peninsula, Russia in 2007. At the same time, as a current range retraction of the original inhabitant of the circumpolar tundra zone the arctic fox is going on, the red fox is expanding their range from the south into arctic ...
Intrapopulation variability shaping isotope discrimination and turnover : experimental evidence in Arctic Foxes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Tissue-specific stable isotope signatures can provide insights into the trophic ecology of consumers and their roles in food webs. Two parameters are central for making valid inferences based on stable isotopes, isotopic discrimination (difference in isotopic ratio between consumer and its diet) and turnover time (renewal process of molecules in a given tissue usually measured when half of the tissue ...
Climate variability and density-dependent population dynamics: Lessons from a simple High Arctic ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-09)
Ecologists are still puzzled by the diverse population dynamics of herbivorous small mammals that range from high-amplitude, multiannual cycles to stable dynamics. Theory predicts that this diversity results from combinations of climatic seasonality, weather stochasticity, and density-dependent food web interactions. The almost ubiquitous 3- to 5-y cycles in boreal and arctic climates may theoretically ...
High goose abundance reduces nest predation risk in a simple rodent-free high-Arctic ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-13)
Breeding geese are the preferred prey of the Arctic fox Vulpes lagopus in the high-Arctic Svalbard archipelago. According to the <i>apparent competition hypothesis (ACH)</i>, less-abundant prey species (e.g. ptarmigan, waders and small passerines) will experience higher predation rates when breeding in association with the more common prey (geese), due to spill-over predation by the shared predator. ...
Populasjonssykluser hos rype – stor variasjon i rom og tid
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-27)
Fjellrype og lirype har en vid sirkumpolar utbredelse, med populasjoner som ofte har store, sykliske svingninger. Disse rypesyklusenes periodelengde og amplitude varierer imidlertid svært mye i tid og rom. Mens norske rypepopulasjoner har hatt en 3–4-års syklus koplet til smågnagersyklusen, kan rype andre steder i verden ha 9–11-års sykluser koplet til andre arter i økosystemet. Rypedynamikken kan ...
Iterative model predictions for wildlife populations impacted by rapid climate change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-14)
To improve understanding and management of the consequences of current rapid environmental change, ecologists advocate using long-term monitoring data series to generate iterative near-term predictions of ecosystem responses. This approach allows scientific evidence to increase rapidly and management strategies to be tailored simultaneously. Iterative near-term forecasting may therefore be particularly ...
A screening for canine distemper virus, canine adenovirus and carnivore protoparvoviruses in Arctic foxes (Vulpes lagopus) and red foxes (Vulpes vulpes) from Arctic and sub-Arctic regions of Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-26)
Canine distemper virus (CDV), canine adenovirus (CAdV) and canine parvovirus type 2 (CPV-2) cause disease in dogs (Canis familiaris). These, or closely related viruses, may also infect wild carnivores. The aim of this study was to investigate exposure to CDV, CAdV and CPV-2 among fox populations in Norway. Arctic foxes (n = 178) from High-Arctic Svalbard were investigated for antibodies against CDV. ...