2012
DOI: 10.1371/journal.pone.0032071
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The Influence of Coastal Access on Isotope Variation in Icelandic Arctic Foxes

Abstract: To quantify the ecological effects of predator populations, it is important to evaluate how population-level specializations are dictated by intra- versus inter-individual dietary variation. Coastal habitats contain prey from the terrestrial biome, the marine biome and prey confined to the coastal region. Such habitats have therefore been suggested to better support predator populations compared to habitats without coastal access. We used stable isotope data on a small generalist predator, the arctic fox, to i… Show more

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Cited by 24 publications
(37 citation statements)
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“…We did not find a bi-modal distribution of isotopic ratios in Spring, but rather a continuum from mainly terrestrial to mainly marine diets indicating that arctic foxes foraged predominantly either on sea ice, on land, or both, confirming results from other studies [15], [22]. Based on the isotopic biplots, there were apparently no foxes foraging exclusively on lemmings later in Early- or Mid-Summer, when lemming density and accessibility (absence of snow cover) is highest [39].…”
Section: Discussionsupporting
confidence: 89%
“…We did not find a bi-modal distribution of isotopic ratios in Spring, but rather a continuum from mainly terrestrial to mainly marine diets indicating that arctic foxes foraged predominantly either on sea ice, on land, or both, confirming results from other studies [15], [22]. Based on the isotopic biplots, there were apparently no foxes foraging exclusively on lemmings later in Early- or Mid-Summer, when lemming density and accessibility (absence of snow cover) is highest [39].…”
Section: Discussionsupporting
confidence: 89%
“…Furthermore, due to the Arctic fox's dependence on prey derived from both terrestrial and marine origin (Angerbjörn et al 1994), its population size and dynamics in the long run appears to be affected by both oceanic and terrestrial events (Páls-son et al 2016). The influence of marine habitat is considered to differ between west and east Iceland (Hersteinsson 1992;Dalerum et al 2012), with the western part having a far higher proportion of productive seashores (Ingólfsson 1975).…”
Section: Electronic Supplementary Materialsmentioning
confidence: 99%
“…; Dalerum et al. ). To help cope with uncertainty, predator species commonly use a cocktail of resources coming from various ecosystems, a factor contributing to niche expansion (Ben‐David et al.…”
Section: Introductionmentioning
confidence: 97%