Zonality of Forest Fuels and Their Pyrogenic Transformation in Pine Forests of Central Siberia
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 18, Issue 4
Abstract
Fires in the forests of Siberia occur annually and cause enormous damage to natural resources. Therefore, studies of the natural forest fire hazard, one of the components of which are forest fuels, are relevant. The research carried out on 53 sites in the pine forests growing along the Yenisei meridian transect revealed that surface fuel loads in pine stands of different zones of Central Siberia are defined by geographical latitude and increase from the forest-steppe zone to the northern taiga subzone. The largest forest fuel loads are concentrated in the pine stands of the northern and middle taiga. Their composition is dominated by loads of duff, the fraction of which in surface fuel loads increases from the forest-steppe zone (57.4 %) to the northern taiga zone (71.3 %). The obtained dynamic equations of the reserves of grass-shrub understory over the season may be applicable to grassy types of pine forests. Combustion of surface forest fuels in pine forests during surface fires of different intensity varies from 10.8 to 31.4 t/ha, which is from 26.1 to 74.1 % of their loads before the fire. The intensity of fires determines not only the number of burned forest fuels, but also their post-pyrogenic accumulation regardless of zonal and environmental conditions. The variation of fuel loads in forest areas is related to pyrogenic effects and the recovery period after the last fire, as well as to the mosaic distribution of living ground vegetation. Equations of accumulation of surface forest fuels after fires of different intensity that can be applied to pine forests of Central Siberia are developed. A change of dominants in the ground cover and a decrease in the productivity of the grass-shrub understory occurs in a long-term absence of fires in pine forests. The development of moss cover contributes to the decrease in litter reserves. The data obtained on the loads of surface forest fuels and their transformation during a fire provide the basis for understanding and simulation fire behavior, estimating emissions and impacts of fires on fuel loads, and can be used for improvement the existing global and regional models.
Authors and Affiliations
G. A. Ivanova, V. A. Ivanov
Keywords
Related Articles
- EP ID EP688506
- DOI 10.37482/0536-1036-2020-4-9-26
- Views 269
- Downloads 0
Birch Wood Modification Technology for Creating Neutron Shielding Materials
The article considers a method for producing neutron shielding materials based on modified birch wood. It is known that shielding materials based on polyethylene with boron addition are widely used in the nuclear industr...
Differentiation of Plus Trees of Scots Pine by Xylem Conditions
 An essential stage in the establishment of seed orchards is the formation of an optimal composition, avoiding inbreeding depression in the produced seed material, which develops as a result of crossbreeding between clo...
Age Dynamics of Normal Gray Alder Stands in the Taiga Zone of the North-East of the European Part of Russia
In order to organize, plan and conduct forest management on a scientific basis in stands with predominance and participation of gray alder (Alnus incana (L.) Moench), formed in the conditions of the taiga zone, reliable...
Elastic and Relaxation Properties of Larch Wood and Their Role in Production of Wood and Charcoal Briquettes
Processing of sawdust, which accounts for 10…12 % of the volume of processed raw wood materials in products with high added value, is one of the areas of woodbiorefining. This became a premise for sawdust processing into...
Upgrading the Feller-Delimber-Crosscutter Mechanism of a Forest Harvester
There is an annual increase in the number of modern forestry machines at logging enterprises both in Russia and in foreign countries. At the same time, the fleet of forestry machines is becoming more diverse and multifun...