Allometric Models to Predicate Single-Tree Biomass in the Eurasian Larix spp. Forest

Vladimir Andreevich Usoltsev, Seyed Omid Reza Shobari, Ivan Stepanovich Tsepordey, Walery Zukow

DOI: http://dx.doi.org/10.12775/EQ.2021.003

Abstract


Today, estimating of biological productivity or carbon-depositing ability of forests is going on the global level, and its increase is one of the major factors of climate stabilization. In recent years, two trends in the harmonization of allometric models of tree biomass have been developing. The first of them is related to ensuring the additivity of the biomass component composition, and the second one – to the search for the so-called generic model applicable to a wide range of environmental conditions. However, all "pseudo-generic" models give significant biases in their application in local conditions. In our modeling, we adhere to the principle of biomass additivity, split "generic" model into regional variants by introducing dummy variables, and build the model at the transcontinental level for the first time. When using the unique in terms of the volume of database of trees of the genus Larix Mill. In a number of 420 sample trees, the trans-Eurasian additive allometric models of biomass of trees for Eurasian larch forests are developed, and thereby the combined problem of model additivity and generality is solved. The additive model of tree biomass of Larix is harmonized in two ways: it eliminated the internal contradictions of the component and the total biomass equations, and in addition, it takes into account regional differences of trees of equal sizes on their biomass, i.e. it reflects the regional peculiarities of the component structure of tree biomass.


Keywords


genus Larix; equations additivity;, biosphere role of forests; biomass of single-trees; allometric models; sample plots; biological productivity; transcontinental tables of biomass

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References


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