The summer decline of the collared lemming,<i>Dicrostonyx groenlandicus,</i>in high arctic Greenland

Gilg, Olivier

doi:10.1034/j.1600-0706.2002.11989.x

Cited by 35 publications

(40 citation statements)

References 74 publications

(88 reference statements)

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“…In general, the amplitude of fluctuations is in the range of 20-200, with Siberia being well-known for its' high fluctuations in amplitude (Stenseth and Ims 1993). In eastern Greenland, cycle amplitude is estimated to be more than 100-fold (Gilg 2002).…”

Section: Extent Of Sea Ice and Fluctuations In Rodent Populationmentioning

confidence: 99%

Pulses of movement across the sea ice: population connectivity and temporal genetic structure in the arctic fox

et al. 2011

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Lemmings are involved in several important functions in the Arctic ecosystem. The Arctic fox (Vulpes lagopus) can be divided into two discrete ecotypes: "lemming foxes" and "coastal foxes". Crashes in lemming abundance can result in pulses of "lemming fox" movement across the Arctic sea ice and immigration into coastal habitats in search for food. These pulses can influence the genetic structure of the receiving population. We have tested the impact of immigration on the genetic structure of the "coastal fox" population in Svalbard by recording microsatellite variation in seven loci for 162 Arctic foxes sampled during the summer and winter over a 5-year period. Genetic heterogeneity and temporal genetic shifts, as inferred by STRUCTURE simulations and deviations from Hardy-Weinberg proportions, respectively, were recorded. Maximum likelihood estimates of movement as well as STRUCTURE simulations suggested that both immigration and genetic mixture are higher in Svalbard than in the neighbouring "lemming fox" populations. The STRUCTURE simulations and AMOVA revealed there are differences in genetic composition of the population between summer and winter seasons, indicating that immigrants are not present in the reproductive portion of the Svalbard population. Based on these results, we conclude that Arctic fox population structure varies with time and is influenced by immigration from neighbouring populations. The lemming cycle is likely an important factor shaping Arctic fox movement across sea ice and the subsequent population genetic structure, but is also likely to influence local adaptation to the coastal habitat and the prevalence of diseases.

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Section: Extent Of Sea Ice and Fluctuations In Rodent Populationmentioning

confidence: 99%

Pulses of movement across the sea ice: population connectivity and temporal genetic structure in the arctic fox

et al. 2011

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“…Across most of its breeding range, it depends on cyclic lemming densities to breed (Andersson 1971(Andersson , 1976(Andersson , 1981Larson 2007;Maher 1970;Meltofte and Høye 2007), and there is a strong interaction between these two species (Gilg et al 2003). Along with a few other predators, the Long-tailed Skua regulates the Collared Lemming (Dicrostonyx groenlandicus) dynamics in Northeast Greenland (Gilg et al 2006;Schmidt et al 2008), especially during the peak phase of the lemming cycle when, along with the Snowy Owl (Nyctea scandiaca) and the Arctic Fox (Alopex lagopus), it is responsible for the rapid summer decline in lemming numbers (Gilg 2002).…”

Section: Introductionmentioning

confidence: 95%

Post-breeding migration of four Long-tailed Skuas (Stercorarius longicaudus) from North and East Greenland to West Africa

2010

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“…Most researchers agree that trophic interactions drive multi-annual high-amplitude cycles of northern rodent populations, although the relative importance of rodent-predator and plant-rodent interactions may vary between species and geographic areas (Jedrzejewski and Jedrzejewska, 1996;Korpima¨ki and Krebs, 1996;Turchin et al, 2000;Ergon et al, 2001;Hanski et al, 2001;Turchin and Batzli, 2001;Klemola et al, 2002b;Korpima¨ki et al, 2002Korpima¨ki et al, , 2005b. Even if there is no full consensus of the role of predation in the mechanism driving the cycles, radio telemetry studies have revealed that predation is the main mortality factor in the northern small rodent populations with multi-annual cycles Korpima¨ki, 1995, 1998;Steen, 1995;Banks et al, 2000;Gilg, 2002). Therefore predation has been evoked as a key factor in the models focusing on adaptive vs. non-adaptive behaviour in fluctuating vole populations (Ylo¨nen, 1994;Oksanen and Lundberg, 1995;Kaitala et al, 1997;Ruxton and Lima, 1997).…”

Section: Introductionmentioning

confidence: 97%

Survival Through Bottlenecks of Vole Cycles: Refuge or Chance Events?

Norrdahl

Korpimäki

2005

Evol Ecol

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In small rodent populations with wide-amplitude fluctuations and low-density bottlenecks, the individuals that survive through the bottlenecks may gain major fitness advantages as they will be the founders of the following population expansion. Most hypotheses assume that there exists a physical or behavioural refuge from increased predation risk, and that the survivors are most likely individuals adapted to use such refuges. A recent hypothesis suggests that survival probability is habitat-dependent so that some otherwise sub-optimal habitats provide a spatial refuge from predation risk by the main predator(s). We used spatially replicated long-term trapping and tracking data of voles (field vole Microtus agrestis and sibling vole M. rossiaemeridionalis) and their main predators (weasel Mustela nivalis and stoat M. erminea) to test predictions based on this hypothesis. We did not find support for the hypothesis. We did not find marked phase-dependent differences in the habitat-level distribution of Microtus voles. Habitat types with low Microtus vole abundance had, on average, comparable predator activity than the main Microtus vole habitats, indicating that there were no habitat-level refuges from predators. There appeared to be no permanent site-level refuges: the spatial distribution of voles varied from one bottleneck to another. This suggests that survival through bottlenecks is at least partly determined by chance events. We propose that in this kind of systems, where relatively short-lived prey are hunted by nomadic or widely ranging predators, short-term anti-predator responses may increase survival prospects as efficiently as more costly anti-predator adaptations, and there is no apparent need to maintain special adaptations to bottleneck situations that occur at infrequent intervals.

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The summer decline of the collared lemming,Dicrostonyx groenlandicus,in high arctic Greenland

Abstract: Gilg, O. 2002. The summer decline of the collared lemming, Dicrostonyx groenlandicus, in high arctic Greenland. -Oikos 99: 499-510.

Cited by 35 publications

References 74 publications

Pulses of movement across the sea ice: population connectivity and temporal genetic structure in the arctic fox

Pulses of movement across the sea ice: population connectivity and temporal genetic structure in the arctic fox

Post-breeding migration of four Long-tailed Skuas (Stercorarius longicaudus) from North and East Greenland to West Africa

Survival Through Bottlenecks of Vole Cycles: Refuge or Chance Events?

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