Preprints
https://doi.org/10.5194/bg-2022-80
https://doi.org/10.5194/bg-2022-80
 
06 Apr 2022
06 Apr 2022
Status: this preprint is currently under review for the journal BG.

Allometric equations and wood density parameters for estimating aboveground and woody debris biomass in Cajander larch (Larix cajanderi) forests of Northeast Siberia

Clement Jean Frédéric Delcourt and Sander Veraverbeke Clement Jean Frédéric Delcourt and Sander Veraverbeke
  • Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, 1081 HV, The Netherlands

Abstract. Boreal forests are particularly vulnerable to climate warming which increases the occurrence of natural disturbances, such as fires and insect outbreaks. It is therefore essential to better understand climate-induced changes in boreal vegetation dynamics. This requires accurate estimates of variations in biomass across regions and time. This remains challenging in the extensive larch forests of Northeast Siberia because of the paucity of allometric equations and physical properties of woody debris needed for quantifying aboveground biomass pools from field surveys. Our study is the first to present values of mean squared diameter (MSD) and specific gravity that can be used to calculate fine dead and downed woody fuel loads in Cajander larch (Larix cajanderi) forests using the line-intersect sampling approach. These values were derived from field measurements collected in 25 sites in the Republic of Sakha, Russia, and compared with values reported for other prevalent boreal tree species. We developed allometric equations relating diameter at breast height (DBH) to stem wood, stem bark, branches, foliage, and aboveground biomass based on measurements of 63 trees retrieved from previous studies. Differences between our allometric models and existing equations were assessed in predicting larch aboveground biomass in 53 sites sampled in the Republic of Sakha. We found that using fine woody debris (FWD) parameters from other boreal tree species and allometric equations developed in other regions may result in significant underestimates of fuel biomass in larch-dominated forests of Northeast Siberia. The FWD parameters and allometric equations presented in our paper can be used to refine estimates of aboveground biomass in Cajander larch forests in Northeast Siberia.

Clement Jean Frédéric Delcourt and Sander Veraverbeke

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2022-80', Anonymous Referee #1, 12 Apr 2022
    • AC1: 'Reply on RC1', Clement Delcourt, 02 Jun 2022
  • RC2: 'Comment on bg-2022-80', Anonymous Referee #2, 15 Apr 2022
    • AC2: 'Reply on RC2', Clement Delcourt, 02 Jun 2022
  • RC3: 'Comment on bg-2022-80', Anonymous Referee #3, 03 Jun 2022
    • AC3: 'Reply on RC3', Clement Delcourt, 23 Jun 2022

Clement Jean Frédéric Delcourt and Sander Veraverbeke

Clement Jean Frédéric Delcourt and Sander Veraverbeke

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Short summary
This study provides new equations that can be used to estimate aboveground tree biomass in larch-dominated forests of Northeast Siberia. Applying these equations to 53 forest stands in the Republic of Sakha (Russia) resulted in significantly larger biomass stocks than when using existing equations. The data presented in this work can help refine biomass estimates in Siberian boreal forests. This is essential to assess changes in boreal vegetation and carbon dynamics.
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