Geoscience Reference
In-Depth Information
Plate 22.2
Brown lemming, Devon Island, Canadian Arctic. Lemming populations fluctuate widely but in a cyclical manner, and
the cycles are dynamically stable.
Photo: Ken Atkinson
Plate 22.3
Red grouse populations in Britain show cycles. Numbers are being monitored by radio-tracking on the National
Nature Reserve of Rickarton Moor, near Stonehaven, Scotland.
Photo: Ken Atkinson
