Long‐term geothermal warming reduced stocks of carbon but not nitrogen in a subarctic forest soil

Peplau, Tino; Schroeder, Julia; Gregorich, E.G.; Poeplau, Christopher

doi:10.1111/gcb.15754

Cited by 17 publications

(14 citation statements)

References 64 publications

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“…Boreal forests are expected to exhibit increased NPP under climate change (Strömgren & Linder, 2002). Increases in total plant biomass may lead to N-mining of SOM in these N-limited, ectomycorrhizal-dominated systems (Yin et al, 2013), and thus a subsequent net loss of boreal forest MAOM-C and total SOM (Peplau et al, 2021;Terrer et al, 2021) 2).…”

Section: Response To Climate Changementioning

confidence: 99%

“…Because more POM-C than MAOM-C is lost under warming via accelerated microbial activity in boreal forests, the ratio of MAOM-C:SOC should increase (Peplau et al, 2021).…”

Section: Response To Climate Changementioning

confidence: 99%

“…Boreal forests are expected to exhibit increased NPP under climate change (Strömgren & Linder, 2002). Increases in total plant biomass may lead to N‐mining of SOM in these N‐limited, ectomycorrhizal‐dominated systems (Yin et al., 2013), and thus a subsequent net loss of boreal forest MAOM‐C and total SOM (Peplau et al., 2021; Terrer et al., 2021). Yet, soil N availability with warming may also increase, potentially increasing certain MAOM formation traits, like the biochemical quality of litter inputs (i.e.…”

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

“…lower C:N ratio), with unknown effects on MAOM‐C pools. Experimental data on boreal forest MAOM‐C under climate change are sparse, but evidence from warming gradients suggests that MAOM‐C pools will be depleted (Peplau et al., 2021; Poeplau et al., 2020), likely due to accelerated MAOM‐C decomposition of that exceeding increases in plant OM feedstock. Overall, we expect both MAOM‐C and total SOC in boreal forests to decrease under climate change (Table 2).…”

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

“…Overall, we expect both MAOM‐C and total SOC in boreal forests to decrease under climate change (Table 2). Because more POM‐C than MAOM‐C is lost under warming via accelerated microbial activity in boreal forests, the ratio of MAOM‐C:SOC should increase (Peplau et al., 2021).…”

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

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Global distribution, formation and fate of mineral‐associated soil organic matter under a changing climate: A trait‐based perspective

et al. 2022

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Soil organic matter (SOM) is the largest actively cycling reservoir of terrestrial carbon (C), and the majority of SOM in Earth's mineral soils (~65%) is mineral‐associated organic matter (MAOM). Thus, the formation and fate of MAOM can exert substantial influence on the global C cycle. To predict future changes to Earth's climate, it is critical to mechanistically understand the processes by which MAOM is formed and decomposed, and to accurately represent this process‐based understanding in biogeochemical and Earth system models. In this review, we use a trait‐based framework to synthesize the interacting roles of plants, soil micro‐organisms, and the mineral matrix in regulating MAOM formation and decomposition. Our proposed framework differentiates between plant and microbial traits that influence total OM inputs to the soil (‘feedstock traits’) versus traits that influence the proportion of OM inputs that are ultimately incorporated into MAOM (‘MAOM formation traits’). We discuss how these feedstock and MAOM formation traits may be altered by warming, altered precipitation and elevated carbon dioxide. At a planetary scale, these feedstock and MAOM formation traits help shape the distribution of MAOM across Earth's biomes, and modulate biome‐specific responses of MAOM to climate change. We leverage a global synthesis of MAOM measurements to provide estimates of the total amount of MAOM‐C globally (~840–1540 Pg C; 34%–51% of total terrestrial organic C), and its distribution across Earth's biomes. We show that MAOM‐C concentration is highest in temperate forests and grasslands, and lowest in shrublands and savannas. Grasslands and croplands have the highest proportion of soil organic carbon (SOC) in the MAOM fraction (i.e. the MAOM‐C:SOC ratio), while boreal forests and tundra have the lowest MAOM‐C:SOC ratio. Drawing on our trait framework, we then review experimental data and posit the effects of climate change on MAOM pools in different biomes. We conclude by discussing how MAOM is integrated into soil C models, and how feedstock and MAOM formation traits may be included in these models. We also summarize the projected fate of MAOM under climate change scenarios (Representative Concentration Pathways 4.5 and 8.5) and discuss key model uncertainties. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Response To Climate Changementioning

confidence: 99%

“…Because more POM-C than MAOM-C is lost under warming via accelerated microbial activity in boreal forests, the ratio of MAOM-C:SOC should increase (Peplau et al, 2021).…”

Section: Response To Climate Changementioning

confidence: 99%

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

Section: Biome‐level Distribution Of Mineral‐associated Organic Matte...mentioning

confidence: 99%

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Global distribution, formation and fate of mineral‐associated soil organic matter under a changing climate: A trait‐based perspective

et al. 2022

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Contrasting short-term vs. long-term effects of warming and nitrogen addition on soil organic matter density fractions in a temperate grass-dominated system

Stroud

Henry

2023

Plant Soil

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Soil warming and straw return impacts on winter wheat phenology, photosynthesis, root growth, and grain yield in the North China Plain

Ling

Liu

et al. 2022

Field Crops Research

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Long‐term geothermal warming reduced stocks of carbon but not nitrogen in a subarctic forest soil

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution-NonCo mmercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

Cited by 17 publications

References 64 publications

Global distribution, formation and fate of mineral‐associated soil organic matter under a changing climate: A trait‐based perspective

Global distribution, formation and fate of mineral‐associated soil organic matter under a changing climate: A trait‐based perspective

Contrasting short-term vs. long-term effects of warming and nitrogen addition on soil organic matter density fractions in a temperate grass-dominated system

Soil warming and straw return impacts on winter wheat phenology, photosynthesis, root growth, and grain yield in the North China Plain

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