The Journal of Wildlife Management
Journal Article

Nutritional Quality and Tannin Astringency of Browse in Clear-Cuts and Old-Growth Forests

Patricia J. Happe, Kurt J. Jenkins, Edward E. Starkey and Steven H. Sharrow
The Journal of Wildlife Management
Vol. 54, No. 4 (Oct., 1990), pp. 557-566
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3809349
https://www.jstor.org/stable/3809349
Page Count: 10

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Topics: Old growth forests, Tannins, Seasons, Elks, Olympic games, Forest habitats, Forage, National parks, Stems
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Nutritional Quality and Tannin Astringency of Browse in Clear-Cuts and Old-Growth Forests
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Abstract

We compared nutritional quality and morphology of 4 browse forages of black-tailed deer (Odocoileus hemionus columbianus) and Roosevelt elk (Cervus elaphus roosevelti) in clear-cuts and old-growth forests on the Olympic Peninsula, Washington. Browse in old-growth forests had a greater proportion of leaves, was more succulent, and had higher percent crude protein than browse in clear-cuts. There was no consistent pattern of difference in fiber content and digestibility between forest types. Tannin astringency was greater in clear-cuts than in old growth. Because tannins decrease digestible protein (DP), DP was more available in shrubs grown in old growth than in clear-cuts; little DP was available to cervids browsing in clear-cuts. Retention of patches of old growth in the Pacific Northwest will provide optimum year-round habitat for cervid foraging.
The Journal of Wildlife Management © 1990 Wiley