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Influence of Climate Warming on Arctic Mammals? New Insights from Ancient DNA Studies of the Collared Lemming Dicrostonyx torquatus

Figure 2

Climate history as derived from the GISP2 ice-core (upper panel) and demographic history of the collared lemming Dicrostonyx torquatus (lower panel) during the last 25,200 yrs.

Upper panel: oxygen isotope (O) deviations in ‰ (y-axis). The climate graph was calculated using the program CalPal [85]. Lower panel: Bayesian Skyline Plot reconstruction of the temporal demographic history of Dicrostonyx torquatus. The thick black line is the median estimate of the fNe (y-axis) over time and the blue lines indicate the 95 highest posterior density intervals (HPD).

Figure 2

doi: https://doi.org/10.1371/journal.pone.0010447.g002