Basic wood density is an important ecological trait for woody plants. It is used to 2 characterize species performance and fitness in community ecology, and to compute 3 tree and forest biomass in carbon cycle studies. While wood density has been histor-4 ically measured at 12% moisture for construction purpose, it is convenient to convert 5 this measure to basic wood density, i.e. the ratio of dry mass over green volume.
6Basic wood density can then be used to compute tree dry biomass from living tree 7 volume.
9Here, we show that previous conversion factors used to convert densities at 12% mois-10 ture into basic wood densities are inconsistent. We derive a new, exact formula to 11 compute the basic wood density D b from the density at moisture content w denoted 12 D w , the fibre saturation point S, and the volumetric shrinkage coefficient R. We Based on theory and data, we found that basic wood density could be inferred from
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