Balsam fir (Abies balsamea) establishment dynamics during a spruce budworn (Choristoneura fumiferana) outbreak: an evaluation of the impact of aging techniques
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2001
- handle: 10670/1.7ydy17
- Parent, S.; Morin, H. et Messier, C. (2001). « Balsam fir (Abies balsamea) establishment dynamics during a spruce budworn (Choristoneura fumiferana) outbreak: an evaluation of the impact of aging techniques ». Canadian Journal of Forest Research, 31, pp. 373-376.
Ce document est lié à :
http://archipel.uqam.ca/1588/
Ce document est lié à :
10.1139/cjfr-31-3-373
Mots-clés
spruce budworm Balsam fir impact aging techniquesSujets proches
Abies balsameaCiter ce document
S. Parent et al., « Balsam fir (Abies balsamea) establishment dynamics during a spruce budworn (Choristoneura fumiferana) outbreak: an evaluation of the impact of aging techniques », UQAM Archipel : articles scientifiques, ID : 10670/1.7ydy17
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Résumé
The effects of recurrent spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks on balsam fir (Abies balsamea (L.) Mill.) mortality have been extensively studied in Canada. Most studies report substantial seedling recruitment of balsam fir during outbreaks when reproductive trees are dying. According to previous research, this contradiction could be due to inaccuracies in the conventional aging method. Counting the maximum number of growth rings found at the tree base would significantly underestimate tree age. Counting terminal bud scars found on the entire trunk, including buried stem, would give a more accurate tree age. In this study, we compare recruitment dynamics obtained for aging seedlings in two balsam fir populations (about 500 km apart) using (i) the conventional method and (ii) bud scar counts. For both populations, the conventional method shows substantial recruitment during adult mortality, while the second aging technique reveals reduced recruitment during the epidemic phase of the spruce budworm outbreak.