MauffetteOechel1989

Référence

Mauffette, Y., Oechel, W.C. (1989) Seasonal variation in leaf chemistry of the coast live oak Quercus agrifolia and implications for the California oak moth Phryganidia californica. Oecologia, 79(4):439-445.

Résumé

The perennial foliage of the California coast live oak permits herbivores to feed on this oak species throughout the year. Nitrogen and P contents were higher in new leaves compared to mature foliage. Structural compounds (eg cellulose) in leaves rapidly increased with age. Concentrations of total phenolics and astringency were higher in new foliage, and concentrations of condensed tannins gradually increased as the leaves matured. Peaks of herbivore damage were observed in June and in September-October, and were caused by outbreaks of the California oak moth, a bivoltine oak specialist, which exhibited feeding preferences in June for old leaves over emerging leaves, and which showed no preferences for leaf classes in September. P. californica is adapted to survive on nutritionally poor foliage and to circumvent "quantitative defenses' such as condensed tannins. -from Authors

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@ARTICLE { MauffetteOechel1989,
    AUTHOR = { Mauffette, Y. and Oechel, W.C. },
    TITLE = { Seasonal variation in leaf chemistry of the coast live oak Quercus agrifolia and implications for the California oak moth Phryganidia californica },
    JOURNAL = { Oecologia },
    YEAR = { 1989 },
    VOLUME = { 79 },
    PAGES = { 439-445 },
    NUMBER = { 4 },
    NOTE = { 00298549 (ISSN) Cited By (since 1996): 22 Export Date: 25 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { The perennial foliage of the California coast live oak permits herbivores to feed on this oak species throughout the year. Nitrogen and P contents were higher in new leaves compared to mature foliage. Structural compounds (eg cellulose) in leaves rapidly increased with age. Concentrations of total phenolics and astringency were higher in new foliage, and concentrations of condensed tannins gradually increased as the leaves matured. Peaks of herbivore damage were observed in June and in September-October, and were caused by outbreaks of the California oak moth, a bivoltine oak specialist, which exhibited feeding preferences in June for old leaves over emerging leaves, and which showed no preferences for leaf classes in September. P. californica is adapted to survive on nutritionally poor foliage and to circumvent "quantitative defenses' such as condensed tannins. -from Authors },
    KEYWORDS = { California oak moth coast live oak herbivory leaf chemistry Lepidoptera live oak oak USA, California Phryganidia californica Quercus agrifolia },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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