Unlocking complex soil systems as carbon sinks: multi-pool management as the key

Angst, Gerrit; Mueller, Kevin E.; Castellano, Michael J.; Vogel, Cordula; Wiesmeier, Martin; Mueller, Carsten W.

doi:10.1038/s41467-023-38700-5

Cited by 92 publications

(32 citation statements)

References 129 publications

(161 reference statements)

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“…Nitrogen input can significantly alter soil carbon levels, but there is still controversy in long-term studies regarding changes in soil carbon accumulation associated with nitrogen addition. 43 Here, we report that A. dahurica var. formosana soil responded positively to nitrogen reduction in terms of carbon accumulation.…”

Section: ■ Discussionmentioning

confidence: 92%

Plant Growth-Promoting Rhizobacteria Are Key to Promoting the Growth and Furanocoumarin Synthesis of Angelica dahurica var. formosana under Low-Nitrogen Conditions

Jiang,

Zhang,

Liu

et al. 2024

J. Agric. Food Chem.

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Microbiomes are the most important members involved in the regulation of soil nitrogen metabolism. Beneficial interactions between plants and microbiomes contribute to improving the nitrogen utilization efficiency. In this study, we investigated the Apiaceae medicinal plant Angelica dahurica var. formosana. We found that under a low-nitrogen treatment, the abundance of carbon metabolites in the rhizosphere secretions of A. dahurica var. formosana significantly increased, thereby promoting the ratio of C to N in rhizosphere and nonrhizosphere soils, increasing carbon sequestration, and shaping the microbial community composition, thus promoting a higher yield and furanocoumarin synthesis. Confirmation through the construction of a synthetic microbial community and feedback experiments indicated that beneficial plant growth-promoting rhizobacteria play a crucial role in improving nitrogen utilization efficiency and selectively regulating the synthesis of target furanocoumarins under low nitrogen conditions. These findings may contribute additional theoretical evidence for understanding the mechanisms of interaction between medicinal plants and rhizosphere microorganisms.

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Section: ■ Discussionmentioning

confidence: 92%

Plant Growth-Promoting Rhizobacteria Are Key to Promoting the Growth and Furanocoumarin Synthesis of Angelica dahurica var. formosana under Low-Nitrogen Conditions

Jiang,

Zhang,

Liu

et al. 2024

J. Agric. Food Chem.

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“…In addition, our results showed that microbial necromass C could be well predicted by microbial functional genes/pathways, indicating that microbial catabolism and anabolism play a critical role in mediating microbial necromass C. In this study, we found a higher microbial neromass C in the native‐vegetated coastal sediment. The microbial neromass C is the mineral‐associated organic matter (MAOM), which is an important component of stable C pool and may persist for centuries to millennia (Angst et al, 2023; Liang et al, 2019; Wang, An, et al, 2021). In addition to MAOM, particulate organic matter (POM) containing plant‐derived compounds is also a major part of stable C pool and may be precursors of MAOM with a short residence time (Angst et al, 2023; Lavallee et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The microbial neromass C is the mineral‐associated organic matter (MAOM), which is an important component of stable C pool and may persist for centuries to millennia (Angst et al, 2023; Liang et al, 2019; Wang, An, et al, 2021). In addition to MAOM, particulate organic matter (POM) containing plant‐derived compounds is also a major part of stable C pool and may be precursors of MAOM with a short residence time (Angst et al, 2023; Lavallee et al, 2020). The efficient transformation of plant‐derived C into more persistent microbially derived C increase the contribution of microbial necromass to the stable C pool, which was reported to be influenced by plant diversity (Bai & Cotrufo, 2022; Prommer et al, 2020; Zhu et al, 2020) and management strategies (Hu et al, 2023; Zhou et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

Yu,

Qian,

et al. 2023

Functional Ecology

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Coastal blue carbon (C) ecosystems are recognized as efficient natural C sinks and play key roles in mitigating global climate change. Microbially driven C, nitrogen (N) and sulphur (S) cycles are crucial for ecosystem functioning, but how microorganisms drive C sink formation and C sequestration in coastal sediments remains unclear. In this study, we conducted a comprehensive analysis of amino sugars, C, N and S cycling genes/pathways and their associated taxa in coastal sediments of native (Cyperus malaccensis and Kandelia obovata) and alien (Spartina alterniflora and Sonneratia apetala) vegetation. Compared to the alien‐vegetated coastal sediment, the native‐vegetated coastal sediment had significantly (p < 0.05) higher microbial necromass C and higher functional potentials of chemoautotrophic C fixation, C degradation, methane cycling, N2 fixation, S oxidation and sulphate reduction. Also, our analysis of coastal sediment microbiomes showed that S oxidation could be coupled with C fixation and/or nitrate/nitrite reduction. S oxidation, C degradation and C fixation were found to be key functional pathways for predicting sediment microbial necromass C. Additionally, the sulphur‐oxidizing Burkholderiales metagenome‐assembled genomes (MAGs) were a key functional group that dominated chemoautotrophic C fixation in coastal sediments. These results suggested that chemoautotrophic S oxidizers, in particular Burkholderiales with a novel lineage, might be the key microbial group that dominates microbial necromass C formation in coastal sediments through microbial anabolism (C fixation);the coupling of microbially driven C, N and S cycling processes; and the deposition of microbially derived C. This study provides novel insights into the importance of chemoautotrophic S oxidizers for microbial necromass formation and shed new light on the microbial mechanism of C sink formation in coastal ecosystems, which also has important implications for enhancing C sequestration in coastal wetlands. Read the free Plain Language Summary for this article on the Journal blog.

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“…How much of the depleted reservoir we could replenish will depend on the type of soil and climate, and on innovative technologies and management practices to sequester soil C (e.g. Angst et al., 2023).…”

Section: Discussionmentioning

confidence: 99%

How much organic carbon could the soil store? The carbon sequestration potential of Australian soil

Viscarra Rossel,

Webster,

Zhang

et al. 2023

Global Change Biology

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Soil is a huge carbon (C) reservoir, but where and how much extra C can be stored is unknown. Current methods to estimate the maximum amount of mineral‐associated organic carbon (MAOC) stabilized in the fine fraction (clay + silt, ) fit through the MAOC versus clay + silt relationship, not their maxima, making their estimates more uncertain and unreliable. We need a function that ‘envelopes’ that relationship. Here, using 5089 observations, we estimated that the uppermost 30 cm of Australian soil holds 13 Gt (10–18 Gt) of MAOC. We then fitted frontier lines, by soil type, to the relationship between MAOC and the percentage of clay + silt to estimate the maximum amounts of MAOC that Australian soils could store in their current environments, and calculated the MAOC deficit, or C sequestration potential. We propagated the uncertainties from the frontier line fitting and mapped the estimates of these values over Australia using machine learning and kriging with external drift. The maps show regions where the soil is more in MAOC deficit and has greater sequestration potential. The modelling shows that the variation over the whole continent is determined mainly by climate, linked to vegetation and soil mineralogy. We find that the MAOC deficit in Australian soil is 40 Gt (25–60 Gt). The deficit in the vast rangelands is 20.84 Gt (13.97–29.70 Gt) and the deficit in cropping soil is 1.63 Gt (1.12–2.32 Gt). Management could increase C sequestration in these regions if the climate allowed it. Our findings provide new information on the C sequestration potential of Australian soils and highlight priority regions for soil management. Australia could benefit environmentally, socially and economically by unlocking even a tiny portion of its soil's C sequestration potential.

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Unlocking complex soil systems as carbon sinks: multi-pool management as the key

Cited by 92 publications

References 129 publications

Plant Growth-Promoting Rhizobacteria Are Key to Promoting the Growth and Furanocoumarin Synthesis of Angelica dahurica var. formosana under Low-Nitrogen Conditions

Plant Growth-Promoting Rhizobacteria Are Key to Promoting the Growth and Furanocoumarin Synthesis of Angelica dahurica var. formosana under Low-Nitrogen Conditions

Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

How much organic carbon could the soil store? The carbon sequestration potential of Australian soil

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