A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Race to the canopy: the development of tree size hierarchies following a partial disturbance in a boreal old-growth forest
Tekijät: Kulha Niko, Ahokas Antti, Gauthier Sylvie, Aakala Tuomas
Kustantaja: CANADIAN SCIENCE PUBLISHING
Julkaisuvuosi: 2023
Journal: Canadian Journal of Forest Research
Tietokannassa oleva lehden nimi: CANADIAN JOURNAL OF FOREST RESEARCH
Lehden akronyymi: CAN J FOREST RES
Aloitussivu: 996
Lopetussivu: 1005
Sivujen määrä: 10
ISSN: 0045-5067
eISSN: 1208-6037
DOI: https://doi.org/10.1139/cjfr-2022-0224
Verkko-osoite: https://doi.org/10.1139/cjfr-2022-0224
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/180407325
In boreal old-growth forests, advance regeneration typically attains canopy dominance through growth release events fol-lowing partial disturbances. We sampled competing Picea mariana (Mill.) and Abies balsamea (L.) in disturbed old-growth stands in Quebec, Canada, to understand the intra-and interspecific size hierarchy development. We reconstructed tree size devel-opment and examined the role of initial size difference, time between germination and a disturbance, and the strength of response to the disturbance in determining tree size hierarchies. Trees that regenerated first generally dominated their in-traspecific competitors also following a disturbance event. However, prolonged time between germination and disturbance resulted in a less deterministic outcome. Tree size difference prior to disturbance also influenced the development of size hi-erarchies. In interspecific competition between individuals of the same diameter, A. balsamea had a 61% probability of gaining dominance over P. mariana, the probability being 50% if P. mariana was 5 mm larger than A. balsamea. Dominant trees generally had the strongest response to the disturbance, reinforcing the existing size hierarchies. The largest trees typically gain domi-nance after a partial disturbance. However, interspecific competition is less predictable than intraspecific competition, small initial size difference, and prolonged time in suppression potentially changing tree size hierarchies.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
