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WEATHER AND SYNCHRONY IN 10-YEAR POPULATION CYCLES OF ROCK PTARMIGAN AND RED GROUSE IN SCOTLAND.(Statistical Data Included)
- Article from:
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Ecology
- Article date:
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August 1, 2000
- Author:
- WATSON, A.; Moss, R.; ROTHERY, P.
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Copyright informationCOPYRIGHT 2000 Ecological Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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A. WATSON [1,3]
R. Moss [1]
P. ROTHERY [2]
Abstract. Rock Ptarmigan (Lagopus mutus on two adjacent submassifs, and Red Grouse (Lagopus lagopus scoticus) on lower ground between them, showed largely synchronous [sim]10-yr cycles during a [sim]50-yr study on the infertile Cairngorms massif of Scotland. Adult birds of both these Lagopus species were counted along transect walks. Both species showed the very low mid-1940s trough previously recorded for tetraonids in much of northwest Europe. Each of five subsequent peaks in all three populations fell within a year of one another, and 1-2 yr after cyclic high June temperatures at a nearby village. Troughs were less ...