Succession après épidémie de la tordeuse des bourgeons de l'épinette (Choristoneura fumiferana) dans des sapinières boréales pluviales de seconde venue
| Autor: | Sylvie Côté, Stéphane Marchand, Louis Bélanger, Stéphane Déry |
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| Rok vydání: | 2000 |
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| Zdroj: | Canadian Journal of Forest Research. 30:801-816 |
| ISSN: | 1208-6037 0045-5067 1974-1987 |
| DOI: | 10.1139/x99-240 |
| Popis: | Following spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks, Baskerville's model (G.L. Baskerville. 1975. Spruce budworm: super silviculturalist. For. Chron. 51: 138-140), referred to as the cyclic model, is generally accepted as one of the best established regeneration models in wet boreal fir stands typical of northeastern America. According to that model, old virgin fir stands killed by the insect are replaced by other fir stands. In this study, we wanted to check if the cyclic model would work with wet boreal fir stands originating from harvest and having reached the felling age (50-60 years old) observed in Quebec. The study set up after the last budworm outbreak (1974-1987) shows that, although coniferous regeneration is abundant, the seedling bank is obviously immature: young and small seedlings, empty microsites. In most cases, the regeneration is codominated or dominated by deciduous species, which may bring about the development of a deciduous stand. Thus, the cyclic model does not seem suited to describe dynamics of second-growth boreal fir stands when it is kept in a premature state ( |
| Databáze: | OpenAIRE |
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