Model of above-ground biomass distribution of Norway spruce (Picea abies L. (Karst.))

Climate change with more frequent extreme weather events and prolonged winter periods with un-frozen, wet soil is causing frequent wind damage events in forests. Trees with higher mass point and heavier weight are more prone to wind damage; however, limited information exists on distribution of biom...

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Bibliographic Details
Published in:Bioresources 2020-05, Vol.15 (2), p.4314-4322
Main Authors: Krišāns, Oskars, Samariks, Valters, Matisons, Roberts, Jansons, Āris
Format: Article
Language:English
Subjects:
Biomass
Branches
Climate change
Confidence intervals
Data analysis
Diameters
Extreme weather
Frozen ground
Load distribution
Picea abies
Pine trees
Principal components analysis
Soils
Stems
Trees
Weather
Weight
Wind
Wind damage
Wind loads
Windthrow
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Summary:Climate change with more frequent extreme weather events and prolonged winter periods with un-frozen, wet soil is causing frequent wind damage events in forests. Trees with higher mass point and heavier weight are more prone to wind damage; however, limited information exists on distribution of biomass under naturally moist conditions. Such information is essential to improve models of wind damage prediction. Therefore, the aim of the present study was to assess the biomass distribution and the parameters important for wind-load of Norway spruce (Picea abies (L.) Karst.). Samples were collected in the year 2019 from 87 trees growing on two different sites, corresponding to freely drained mineral and peaty mineral soils at the age of 55 and 88 years, respectively. Tree diameters at breast height, height, and height of first living branch were measured. Tree stems were pruned and cut into 2-m-long fragments and weighed (fresh weight) afterwards. A biomass distribution model was developed to estimate fresh weight of the stem of Norway spruce using easy measurable tree variables. Relative height of the mass point and height of living branches were higher in peaty mineral soil than on freely drained mineral soil, which was an indicator for higher windthrow risks.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.15.2.4314-4322