Forest stand biomass and NPP models sensitive to winter temperature and annual precipitation for Betula spp. in Eurasia

Abstract

Forest ecosystems, as sinks of atmospheric carbon, play an important role in reducing CO2 emissions and preventing annual temperatures from rising. On the other hand, climate change entails changes in the structure and functions of all the biota, including forest cover. Therefore, we attempted to model Betula spp. ecosystem biomass and annual net primary production (NPP) (t ha-1) using the data from 650 forest stands for biomass, 245 for NPP and biomass, as well as climate data on the Trans-Eurasian hydrothermal gradients. The model involves regional peculiarities of age and morphology of the forests. It is found that the reaction of birch biomass and NPP structure on temperature and precipitation corresponds to the principle of limiting factors by Liebig-Shelford but in different proportions for different species. Since the minimum values of biomass and NPP occur in regions with minimum precipitation and minimum temperature, these two factors are limiting in terms of biomass and NPP of birches. The same phenomenon is typical for firs, partly typical for spruces and very differ for larches and pines. The development of such models for basic forest-forming species grown in Eurasia will give possibility to predict any changes in the biological productivity of forest cover of Eurasia in relation to climate change.

A dataset of forest biomass structure for Eurasia

“…The dataset can be used for a number of applications, but are not limited to the following examples. An early version of the dataset was used to develop models of biomass structure 22 , 23 , where the components of biomass (stem, branches, foliage, roots) were shown to be a function of age, site index, relative stocking and growing stock volume. Similar data collections for different regions have been utilised to derive BEF (e.g., ref.…”

Increasing Fuel Loads, Fire Hazard, and Carbon Emissions from Fires in Central Siberia

“…The existing global fuel data set [34] cannot be used for local and regional studies but rather for country and continental scale research and fire-related applications. While some attempts to map fuel and carbon loads with the use of forest inventory datasets have been made for several parts of the Russian territory [35][36][37][38], these maps are not freely available and do not include all individual fuels that contribute to burning to varying degrees. Detailed fuel-loading maps for the extensive area of Siberia are still absent.…”