Quantifying competition in white spruce (Picea glauca) plantations
| Autor: | Robert Schneider, Tony Franceschini, Alexa Bérubé-Deschênes |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Balsam 010504 meteorology & atmospheric sciences [SDV]Life Sciences [q-bio] media_common.quotation_subject Forest management Site index Biology 010603 evolutionary biology 01 natural sciences Distance-independent and distance dependant competition indices Modelling Competition (biology) Basal area Tree growth Inter- and intra-specific competition Ecosystem 0105 earth and related environmental sciences media_common Ecology Forestry Growth model 15. Life on land White (mutation) |
| Zdroj: | Annals of Forest Science Annals of Forest Science, Springer Nature (since 2011)/EDP Science (until 2010), 2017, 74 (2), pp.26. ⟨10.1007/s13595-017-0624-3⟩ |
| ISSN: | 1297-966X 1286-4560 |
| DOI: | 10.1007/s13595-017-0624-3 |
| Popis: | International audience; AbstractKey messageIn mixed forest plantations in sub-boreal forests with high levels of natural regeneration ingrowth, competition must be quantified differently for each species, with distant-independent indices working better for the planted species and distant-dependent indices for ingrown balsam fir. Although broadleaved competition hinders growth of coniferous species more than coniferous competition, the differentiation between clades is not important enough to improve growth predictions.ContextThe use of ecosystem-based forest management has changed how forest stands are tended. This shift in the management paradigm has led to a higher tolerance in natural ingrowth regeneration in plantations. The correct way of quantifying competition must thus be assessed to develop growth simulators.AimsAn individual tree relative basal area increment (RBAI) growth model for white spruce, balsam fir and other coniferous and broadleaved species was calibrated.MethodsUsing data obtained from 94 sample plots in 48 white spruce plantations from Eastern Quebec, we considered both linear and nonlinear models of RBAI as a function of site index, tree size and tree competition. The tested distance-dependent and distance-independent indices were also discriminated according to competitor clade (conifers or broadleaves).ResultsThe best competition index for balsam fir was distance-dependent whereas a distant-independent one was retained for the other species groups. Moreover, broadleaved competitors had stronger effect on RBAI for white spruce growth when compared to coniferous competitors.ConclusionCompetition must be quantified depending on if the species is planted or ingrown. However, dividing competition into clades (i.e. coniferous versus broadleaved) is not necessary, at least in the present study. |
| Databáze: | OpenAIRE |
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