BrassardChenBergeronEtAl2011a

Référence

Brassard, B.W., Chen, H.Y.H., Bergeron, Y., Pare, D. (2011) Coarse root biomass allometric equations for Abies balsamea, Piceamariana, Pinus banksiana, and Populus tremuloides in the boreal forestof Ontario, Canada. Biomass and Bioenergy, 35(10):4189-4196. (Scopus )

Résumé

Although coarse root (diameter > 1 cm) biomass can account forapproximately 30% of total biomass in forest ecosystems, coarse rootbiomass models are rarely available, especially for larger trees.In this study, we used a back-hoe excavator and pressurized waterto excavate the coarse root systems of large size trees of Abiesbalsamea L., Picea mariana (Mill.) BSP, Pinus banksiana Lamb., andPopulus tremuloides Michx. in the boreal mixedwood forest of centralCanada in order to develop allometric equations that link stem diameterat breast-height (DBH) and height to coarse root biomass. All regressionsfor coarse root biomass using DBH or height alone, or both DBH andheight as predictors were significant (R2 ≥ 0.796, P < 0.05).The DBH - coarse root biomass models had higher R2 values than theheight - coarse root biomass models for all four species, indicatingthat DBH was a better predictor of coarse root biomass than height.In addition, the DBH-height - coarse root biomass models did nothave higher R2 values than the DBH - coarse root biomass models.All but one DBH - coarse root biomass model from the published literaturewith similar DBH range underestimated or overestimated coarse rootbiomass using the data from this study. It would appear that coarseroot biomass allometric equations are probably site-specific becauseabove- and below-ground biomass allocation differs with site condition.However, differences among studies may also be attributable to samplingmethodologies. © 2011 Elsevier Ltd.

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@ARTICLE { BrassardChenBergeronEtAl2011a,
    AUTHOR = { Brassard, B.W. and Chen, H.Y.H. and Bergeron, Y. and Pare, D. },
    TITLE = { Coarse root biomass allometric equations for Abies balsamea, Piceamariana, Pinus banksiana, and Populus tremuloides in the boreal forestof Ontario, Canada },
    JOURNAL = { Biomass and Bioenergy },
    YEAR = { 2011 },
    VOLUME = { 35 },
    PAGES = { 4189-4196 },
    NUMBER = { 10 },
    ABSTRACT = { Although coarse root (diameter > 1 cm) biomass can account forapproximately 30% of total biomass in forest ecosystems, coarse rootbiomass models are rarely available, especially for larger trees.In this study, we used a back-hoe excavator and pressurized waterto excavate the coarse root systems of large size trees of Abiesbalsamea L., Picea mariana (Mill.) BSP, Pinus banksiana Lamb., andPopulus tremuloides Michx. in the boreal mixedwood forest of centralCanada in order to develop allometric equations that link stem diameterat breast-height (DBH) and height to coarse root biomass. All regressionsfor coarse root biomass using DBH or height alone, or both DBH andheight as predictors were significant (R2 ≥ 0.796, P < 0.05).The DBH - coarse root biomass models had higher R2 values than theheight - coarse root biomass models for all four species, indicatingthat DBH was a better predictor of coarse root biomass than height.In addition, the DBH-height - coarse root biomass models did nothave higher R2 values than the DBH - coarse root biomass models.All but one DBH - coarse root biomass model from the published literaturewith similar DBH range underestimated or overestimated coarse rootbiomass using the data from this study. It would appear that coarseroot biomass allometric equations are probably site-specific becauseabove- and below-ground biomass allocation differs with site condition.However, differences among studies may also be attributable to samplingmethodologies. © 2011 Elsevier Ltd. },
    COMMENT = { Export Date: 20 October 2011Source: ScopusCODEN: BMSBEdoi: 10.1016/j.biombioe.2011.06.045 },
    ISSN = { 09619534 (ISSN) },
    KEYWORDS = { Allometric equations, Boreal forest, Carbon budget models, Coarseroot biomass, Tree DBH and height },
    OWNER = { Luc },
    TIMESTAMP = { 2011.10.20 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-80053615532&partnerID=40&md5=d010fd83d3a62d70f95184bffb20c623 },
}

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