Figure 4 : Skyline plot showing temporal changes in genetic diversity in bowhead whales.

From: Ancient DNA reveals that bowhead whale lineages survived Late Pleistocene climate change and habitat shifts

Figure 4

The x axis is in calendar years; the y axis is the product of effective population size and generation time (Neτ). The temporal span of the radiocarbon-dated samples used in this analysis is shown as vertical lines below the x axis; each line represents one dated individual.