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

Bona, Kelly Ann; Fyles, James W.; Shaw, Cindy; Kurz, Werner A.

doi:10.1007/s10021-013-9668-x

Cited by 35 publications

(18 citation statements)

References 60 publications

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“…For example, white spruce and black spruce had a strong positive correlation with ORGSOIL in the plot data, but not in the model data. The high ORGSOIL C stocks may be explained by slow decomposition rates associated with the litter and woody debris contributions to organic soil horizons for black and white spruce (Laiho and Prescott, 2004;Lang et al, 2009), and by the fact that they are also commonly associated with mosses in the boreal forest of Canada, especially when they occur on less well or poorly drained sites (Bona et al, 2013). It is likely that accurate modeling in these, and some other boreal forests with significant moss associations, will require representation of moss contributions to ORGSOIL that are currently not included in the CBM-CFS3 (Bona et al, 2013).…”

Section: Discussionmentioning

confidence: 97%

The importance of tree species and soil taxonomy to modeling forest soil carbon stocks in Canada

et al. 2015

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Section: Discussionmentioning

confidence: 97%

The importance of tree species and soil taxonomy to modeling forest soil carbon stocks in Canada

et al. 2015

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“…Climate and pH also are important drivers of the substrate use efficiency of soil microbes (Cotrufo, Wallenstein, Boot, Denef, & Paul, ), but their relative contributions remain unknown. Several studies have reported that the dominance of the ground layer vegetation also influences C accumulation processes (Bisbee et al., ; Bona, Fyles, Shaw, & Kurz, ). Feathermosses have a higher decomposability (Fenton, Bergeron, & Paré, ; Lang et al., ) and lesser productivity (Bisbee et al., ) than sphagna, so we expected more C accumulation in the FH layer with the increasing dominance of sphagna.…”

Section: Methodsmentioning

confidence: 99%

Drivers of postfire soil organic carbon accumulation in the boreal forest

Andrieux

Béguin

Bergeron

et al. 2018

Global Change Biology

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The accumulation of soil carbon (C) is regulated by a complex interplay between abiotic and biotic factors. Our study aimed to identify the main drivers of soil C accumulation in the boreal forest of eastern North America. Ecosystem C pools were measured in 72 sites of fire origin that burned 2-314 years ago over a vast region with a range of ∆ mean annual temperature of 3°C and one of ∆ 500 mm total precipitation. We used a set of multivariate a priori causal hypotheses to test the influence of time since fire (TSF), climate, soil physico-chemistry and bryophyte dominance on forest soil organic C accumulation. Integrating the direct and indirect effects among abiotic and biotic variables explained as much as 50% of the full model variability. The main direct drivers of soil C stocks were: TSF >bryophyte dominance of the FH layer and metal oxide content >pH of the mineral soil. Only climate parameters related to water availability contributed significantly to explaining soil C stock variation. Importantly, climate was found to affect FH layer and mineral soil C stocks indirectly through its effects on bryophyte dominance and organo-metal complexation, respectively. Soil texture had no influence on soil C stocks. Soil C stocks increased both in the FH layer and mineral soil with TSF and this effect was linked to a decrease in pH with TSF in mineral soil. TSF thus appears to be an important factor of soil development and of C sequestration in mineral soil through its influence on soil chemistry. Overall, this work highlights that integrating the complex interplay between the main drivers of soil C stocks into mechanistic models of C dynamics could improve our ability to assess C stocks and better anticipate the response of the boreal forest to global change.

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“…Carbon models serve as the basis for some national C accounting frameworks (Kurz et al 2009). Recently, Bona et al (2013) determined that forest C stocks could not be simulated accurately without information on both vascular and nonvascular biomass and productivity. Although such efforts in boreal regions have focused on forests, attempts to examine landscape to regional carbon exchange and storage will need to consider peatlands, given that these ecosystems are a dominant land cover type in most northern settings.…”

Section: Conclusion and Relevance To Land Managementmentioning

confidence: 99%

Response of plant community structure and primary productivity to experimental drought and flooding in an Alaskan fen

et al. 2015

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Northern peatlands represent a long-term net sink for atmospheric CO 2 , but these ecosystems can shift from net carbon (C) sinks to sources based on changing climate and environmental conditions. In particular, changes in water availability associated with climate control peatland vegetation and carbon uptake processes. We examined the influence of changing hydrology on plant species abundance and ecosystem primary production in an Alaskan fen by manipulating the water table in field treatments to mimic either sustained flooding (raised water table) or drought (lowered water table) conditions for 6 years. We found that water table treatments altered plant species abundance by increasing sedge and grass cover in the raised water table treatment and reducing moss cover while increasing vascular green area in the lowered water table treatment. Gross primary productivity was lower in the lowered treatment than in the other plots, although there were no differences in total biomass or vascular net primary productivity among the treatments. Overall, our results indicate that vegetation abundance was more sensitive to variation in water table than total biomass and vascular biomass accrual. Finally, in our experimental peatland, drought had stronger consequences for change in vegetation abundance and ecosystem function than sustained flooding.Résumé : À long terme les tourbières nordiques constituent un puits net pour le CO 2 atmosphérique mais ces écosystèmes peuvent passer d'un puits à une source nette de carbone (C) à cause du changement climatique et des conditions environnementales. Plus particulièrement, les modifications de la disponibilité en eau associées à l'effet du climat influencent la végétation des tourbières et les processus d'absorption de C. Nous avons étudié l'influence de la modification du régime hydrique sur l'abondance des espèces végétales et la production primaire de l'écosystème dans une tourbière basse en Alaska. Le régime hydrique a été modifié en manipulant la nappe phréatique avec des traitements sur le terrain visant à reproduire les conditions d'une inondation (élévation de la nappe phréatique) ou d'une sécheresse (abaissement de la nappe phréatique) qui ont persisté pendant 6 ans. Nous avons observé que les modifications de la nappe phréatique ont influencé l'abondance des espèces végétales : la couverture de carex et de graminées a augmenté alors que la couverture de mousses a diminué où la nappe phréatique avait été élevée tandis que la superficie occupée par les plantes vasculaires a augmenté où la nappe phréatique avait été abaissée. La production primaire brute était plus faible où la nappe phréatique avait été abaissée que dans les autres parcelles mais il n'y avait pas de différences entre les traitements quant à la biomasse totale ou la productivité primaire nette des plantes vasculaires. Globalement, nos résultats indiquent que l'abondance de la végétation est plus sensible à la variation de la nappe phréatique que la biomasse totale et l'accroissement de la biomasse des plante...

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

Cited by 35 publications

References 60 publications

The importance of tree species and soil taxonomy to modeling forest soil carbon stocks in Canada

The importance of tree species and soil taxonomy to modeling forest soil carbon stocks in Canada

Drivers of postfire soil organic carbon accumulation in the boreal forest

Response of plant community structure and primary productivity to experimental drought and flooding in an Alaskan fen

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