Ecosystems

, Volume 16, Issue 6, pp 1071–1086

Are Mosses Required to Accurately Predict Upland Black Spruce Forest Soil Carbon in National-Scale Forest C Accounting Models?

  • Kelly Ann Bona
  • James W. Fyles
  • Cindy Shaw
  • Werner A. Kurz
Article

DOI: 10.1007/s10021-013-9668-x

Cite this article as:
Bona, K.A., Fyles, J.W., Shaw, C. et al. Ecosystems (2013) 16: 1071. doi:10.1007/s10021-013-9668-x

Abstract

The boreal forest plays a key role in the global carbon (C) cycle, and black spruce (Picea mariana (Mill.) BSP) forests are the dominant coniferous forest type in the Canadian boreal forest. National-scale forest C models currently do not account for the contribution of moss-derived organic matter that we hypothesize to be significant in the C budget of black spruce ecosystems. One such model, the Carbon Budget Model of the Canadian Forest Sector (CBM-CFS3), is designed to meet Canada’s forest-related greenhouse gas reporting requirements. In this study our goal was to determine if black spruce forest soil C stocks are significantly underestimated by the CBM-CFS3, and if so, to determine if estimates could be improved by adding moss-derived C. We conclude that in black spruce sites, organic layer C is significantly underestimated by CBM-CFS3 compared to sites with all other leading tree species analyzed. We compiled and used published moss net primary productivity rates for upland forest systems, with decomposition rates, in mass-balance calculations to estimate mean moss-derived C in black spruce forests for feather mosses at 64 Mg C ha−1, and for sphagnum mosses at 103 Mg C ha−1. These C pools are similar to the CBM-CFS3 mean underestimation of black spruce soil organic layers (63 Mg C ha−1). We conclude that the contribution of mosses is sufficiently large that a moss C pool should be added to national-scale models including the CBM-CFS3, to reduce uncertainties in boreal forest C budget estimation. Feather and sphagnum mosses should be parameterized separately.

Keywords

soil carbon moss carbon carbon model black spruce bryophyte carbon Picea mariana 

Supplementary material

10021_2013_9668_MOESM1_ESM.docx (20 kb)
Supplementary material 1 (DOCX 20 kb)

Copyright information

© Her Majesty the Queen in Right of Canada 2013

Authors and Affiliations

  • Kelly Ann Bona
    • 1
  • James W. Fyles
    • 1
  • Cindy Shaw
    • 2
  • Werner A. Kurz
    • 3
  1. 1.Macdonald Campus of McGill UniversitySte-Anne-de-BellevueCanada
  2. 2.Natural Resources Canada, Canadian Forest ServiceEdmontonCanada
  3. 3.Natural Resources Canada, Canadian Forest ServiceVictoriaCanada

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