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Patterns of Life-History and Habitat in Palaearctic and Nearctic Forest Grouse

K. Ingemar Jönsson, Per K. Angelstam and Jon E. Swenson
Ornis Scandinavica (Scandinavian Journal of Ornithology)
Vol. 22, No. 3, Proceedings of the 5th International Symposium on Grouse, 20-24 August 1990, Elverum, Norway (Jul. - Sep., 1991), pp. 275-281
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3676603
Stable URL: http://www.jstor.org/stable/3676603
Page Count: 7
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Patterns of Life-History and Habitat in Palaearctic and Nearctic Forest Grouse
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Abstract

The life histories in Palaearctic and Nearctic forest grouse were studied and compared to three aspects of the habitats - successional stage of forest, habitat structure ("open-ness"), and winter food ("feeding habitat") - used by different grouse. No evidence of r-selection in grouse using early successional stages of the forest compared with those using later stages was found. Species inhabiting dense habitat structures had low body mass. Winter food was related to both annual adult mortality and reproductive effort. Conifer feeding species had low annual mortality rate and low reproductive effort compared with species feeding on deciduous plants. The possibility of an impact of different winter diets on the evolution of annual adult mortality rate and reproductive effort in forest grouse is discussed.

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