Nutritional quality and tannin astringency of browse in clear-cuts and old-growth forests
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...
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Veröffentlicht in: | The Journal of wildlife management 1990-10, Vol.54 (4), p.557-566 |
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Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 0022-541X 1937-2817 |
DOI: | 10.2307/3809349 |