Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone

Under conditions of a changing climate, the relevance of assessing the full carbon pool of all components of forest ecosystems increases, not only of the living aboveground and underground parts, but also of litter, large detritus, soils, etc. There are numerous estimates of the phytomass of the abo...

Full description

Bibliographic Details
Main Authors: V. А. Usoltsev, I. S. Tsepordey
Format: Article
Language:English
Published: Russian Academy of Sciences, Siberian Branch Publishing House 2022-12-01
Series:Сибирский лесной журнал
Subjects:
Online Access:https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/918/918cd507cbb5b07c2e4919547e968da7.pdf
_version_ 1797958109350592512
author V. А. Usoltsev
I. S. Tsepordey
author_facet V. А. Usoltsev
I. S. Tsepordey
author_sort V. А. Usoltsev
collection DOAJ
description Under conditions of a changing climate, the relevance of assessing the full carbon pool of all components of forest ecosystems increases, not only of the living aboveground and underground parts, but also of litter, large detritus, soils, etc. There are numerous estimates of the phytomass of the aboveground part of forest trees and stands, both taking into account the mass of branches that have died and preserved on tree stems, and without taking them into account. There is no information about the mass of dead branches on tree stems in the available databases on the phytomass of trees. Thus, the mass of dead branches of trees and stands is not included in the calculation of both the input and output components of the carbon cycle, and when estimating the carbon pool of forest ecosystems, it is underestimated by some unknown amount. In the published data on the phytomass of trees, the relative mass of dead branches, i.e. the ratio of the mass of dead branches to the aboveground phytomass, varies from 0.1 to 26 %, however, attempts to identify factors explaining such a wide range of it are quite rare. In this study, the first attempt was made to develop allometric models designed to estimate the mass of dead branches of growing trees of Scots pine (Pinus sylvestris L.) and silver birch (Betula pendula Roth) in the conditions of the steppe zone. The study was based on 465 model trees obtained on 35 sample plots. It was found that in the mature birch stand, the mass of dead branches is 1.32 t/ha and relative mass of dead branches is 2.5 %, in natural pine forests 0.9–17 t/ha and 0.7–13 %, respectively, and in plantations 0.2–13 t/ha and 1.3–11 %, respectively. The dependencies constructed for the relative mass of dead branches are combined with yield tables of the aboveground phytomass of stands of natural origin and plantations of the Turgay Depression. It was found that, depending on the origin of the stand, its age and site index, the relative mass of dead branches varies from 0.8 to 15 %. The proposed allometric models and inventory tables can be used in the assessment of the mass of dead branches on tree stems of pine stands. When calculating carbon pools in the forests of the steppe zone, it is necessary to take into account the mass of dead branches by applying increasing coefficients in pine forests from 0.8 to 15% and in mature birch forests 2.5 %.
first_indexed 2024-04-11T00:14:07Z
format Article
id doaj.art-455cc4b3ee084b8491042ae632470e98
institution Directory Open Access Journal
issn 2311-1410
2312-2099
language English
last_indexed 2024-04-11T00:14:07Z
publishDate 2022-12-01
publisher Russian Academy of Sciences, Siberian Branch Publishing House
record_format Article
series Сибирский лесной журнал
spelling doaj.art-455cc4b3ee084b8491042ae632470e982023-01-09T04:10:02ZengRussian Academy of Sciences, Siberian Branch Publishing HouseСибирский лесной журнал2311-14102312-20992022-12-0196586510.15372/SJFS20220606Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zoneV. А. Usoltsev0I. S. Tsepordey1Botanical Garden, Russian Academy of Sciences, Ural Branch; Ural State Forest Engineering UniversityBotanical Garden, Russian Academy of Sciences, Ural BranchUnder conditions of a changing climate, the relevance of assessing the full carbon pool of all components of forest ecosystems increases, not only of the living aboveground and underground parts, but also of litter, large detritus, soils, etc. There are numerous estimates of the phytomass of the aboveground part of forest trees and stands, both taking into account the mass of branches that have died and preserved on tree stems, and without taking them into account. There is no information about the mass of dead branches on tree stems in the available databases on the phytomass of trees. Thus, the mass of dead branches of trees and stands is not included in the calculation of both the input and output components of the carbon cycle, and when estimating the carbon pool of forest ecosystems, it is underestimated by some unknown amount. In the published data on the phytomass of trees, the relative mass of dead branches, i.e. the ratio of the mass of dead branches to the aboveground phytomass, varies from 0.1 to 26 %, however, attempts to identify factors explaining such a wide range of it are quite rare. In this study, the first attempt was made to develop allometric models designed to estimate the mass of dead branches of growing trees of Scots pine (Pinus sylvestris L.) and silver birch (Betula pendula Roth) in the conditions of the steppe zone. The study was based on 465 model trees obtained on 35 sample plots. It was found that in the mature birch stand, the mass of dead branches is 1.32 t/ha and relative mass of dead branches is 2.5 %, in natural pine forests 0.9–17 t/ha and 0.7–13 %, respectively, and in plantations 0.2–13 t/ha and 1.3–11 %, respectively. The dependencies constructed for the relative mass of dead branches are combined with yield tables of the aboveground phytomass of stands of natural origin and plantations of the Turgay Depression. It was found that, depending on the origin of the stand, its age and site index, the relative mass of dead branches varies from 0.8 to 15 %. The proposed allometric models and inventory tables can be used in the assessment of the mass of dead branches on tree stems of pine stands. When calculating carbon pools in the forests of the steppe zone, it is necessary to take into account the mass of dead branches by applying increasing coefficients in pine forests from 0.8 to 15% and in mature birch forests 2.5 %.https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/918/918cd507cbb5b07c2e4919547e968da7.pdfnatural tree standsforest cropspinus sylvestris l.betula pendula rothmass of dead branchesallometric modelscorrections to the carbon pool
spellingShingle V. А. Usoltsev
I. S. Tsepordey
Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
Сибирский лесной журнал
natural tree stands
forest crops
pinus sylvestris l.
betula pendula roth
mass of dead branches
allometric models
corrections to the carbon pool
title Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
title_full Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
title_fullStr Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
title_full_unstemmed Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
title_short Models and tables of the phytomass of dead branches in growing trees of Scots pine and Silver birch in the steppe zone
title_sort models and tables of the phytomass of dead branches in growing trees of scots pine and silver birch in the steppe zone
topic natural tree stands
forest crops
pinus sylvestris l.
betula pendula roth
mass of dead branches
allometric models
corrections to the carbon pool
url https://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/918/918cd507cbb5b07c2e4919547e968da7.pdf
work_keys_str_mv AT vausoltsev modelsandtablesofthephytomassofdeadbranchesingrowingtreesofscotspineandsilverbirchinthesteppezone
AT istsepordey modelsandtablesofthephytomassofdeadbranchesingrowingtreesofscotspineandsilverbirchinthesteppezone