NDLI: Cycles and synchrony in the Collared Lemming (Dicrostonyx groenlandicus) in Arctic North America

Content Provider	Springer Nature Link
Author	Predavec, Martin Krebs, Charles J. Danell, Kjell Hyndman, Rob
Copyright Year	2000
Abstract	Lemming populations are generally characterised by their cyclic nature, yet empirical data to support this are lacking for most species, largely because of the time and expense necessary to collect long-term population data. In this study we use the relative frequency of yearly willow scarring by lemmings as an index of lemming abundance, allowing us to plot population changes over a 34-year period. Scars were collected from 18 sites in Arctic North America separated by 2–1,647 km to investigate local synchrony among separate populations. Over the period studied, populations at all 18 sites showed large fluctuations but there was no regular periodicity to the patterns of population change. Over all possible combinations of pairs of sites, only sites that were geographically connected and close (<6 km) showed significant synchrony in fluctuations. The populations studied may not even be cyclic, at least for the time period 1960 to 1994, and although fluctuating, randomisation tests could not reject the null hypothesis of random fluctuations. These data have implications for the testing of hypotheses regarding lemming cycles and highlight the need for long-term trapping data to characterise the lemming cycle.
Starting Page	216
Ending Page	224
Page Count	9
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	126
Issue Number	2
e-ISSN	14321939
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2001-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lemming cycle Synchrony Dicrostonyx groenlandicus Ecology Plant Sciences Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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