Intensified rainfall in the wet season alters the microbial contribution to soil carbon storage

Zhou, Jinge; Zhang, Jingfan; Lambers, Hans; Wu, Jingtao; Qin, Guoming; Li, Yingwen; Li, Yongxing; Li, Zhaojun; Wang, Jun; Wang, Faming

doi:10.1007/s11104-022-05389-2

Cited by 13 publications

(7 citation statements)

References 79 publications

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“…Accordingly, fungal necromass was calculated as where 9 is a conversion factor (Engelking et al, 2007;Zhou et al, 2022).…”

Section: Verification Of the Function Annotation Results Via Glucosam...mentioning

confidence: 99%

“…Because GluN is derived from both fungal and bacterial cell walls, FGluN was calculated by subtracting bacteria‐derived GluN from total GluN, assuming that MurN and GluN occur at a 1 to 2 molar ratio in bacterial cell walls, with molecular weights of 179.2 and 251.2 for GluN and MurN, respectively (Appuhn & Joergensen, 2006). Accordingly, fungal necromass was calculated as

Fungal necromass ()(, mg {kg}^{- 1}) goodbreak= FGluN ()(, mg {kg}^{- 1}) goodbreak\times 9,

where 9 is a conversion factor (Engelking et al, 2007; Zhou et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

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Enhanced abundance of generalist and litter saprotrophs explain increased tropical forest soil carbon with long‐term nitrogen deposition

Lu,

Li,

Sayer

et al. 2023

Functional Ecology

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1. Nitrogen (N) deposition is a pervasive anthropogenic change that can alter the dynamics and storage of carbon (C) in tropical soils by altering the transformation of plant litter C to soil organic C (SOC). The response of fungi may be particularly important for explaining how N deposition affects SOC storage in tropical forests because they are the primary decomposers of plant litter. Fungi can be grouped into different ecological guilds, or functional groups, which often have contrasting responses to the same environmental change. However, little is known if shifts in fungal guilds and their functions explain increased tropical forest SOC storage under N deposition.2. We addressed this knowledge gap by assessing the effects of long-term (6 years) experimental N addition (+N) on fungal guilds, their functions and SOC fractions in a tropical forest.3. Total SOC, dissolved organic C (DOC), particulate organic C and fungal necromass C were all higher in +N soils. The fungal community in +N soils was dominated by generalist saprotrophs, and leaf saprotroph abundance increased nearly 93-fold compared to controls. These changes were accompanied by an increase in lignocellulolytic enzymes, indicating accelerated decomposition of recalcitrant litter C compounds. Chitosanase, which catalyses synthesis of glucosamine, was 1.37× higher in +N soils than controls; correspondingly, fungal necromass C contributed 1.42× more to SOC. Greater abundance of saprotrophic enzymes involved in organic acid synthesis in +N soils was associated with higher concentration of Ca 2+ and DOC. | 2283Functional Ecology LU et al.

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“…Accordingly, fungal necromass was calculated as where 9 is a conversion factor (Engelking et al, 2007;Zhou et al, 2022).…”

Section: Verification Of the Function Annotation Results Via Glucosam...mentioning

confidence: 99%

Fungal necromass ()(, mg {kg}^{- 1}) goodbreak= FGluN ()(, mg {kg}^{- 1}) goodbreak\times 9,

where 9 is a conversion factor (Engelking et al, 2007; Zhou et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

Enhanced abundance of generalist and litter saprotrophs explain increased tropical forest soil carbon with long‐term nitrogen deposition

Lu,

Li,

Sayer

et al. 2023

Functional Ecology

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“…Amino sugars were measured as markers for microbial necromass. Amino sugars including muramic acid (MurA), glucosamine (GluN) and galactosamine (GalN) in sediments were hydrolysed, derivatized and measured by a high‐performance liquid chromatography method (Zhang & Amelung, 1996; Zhou, Zhang, et al, 2022). Specifically, 0.5 g of air‐dried sediment samples was hydrolysed with 10 mL of 6 M HCl at 105°C for 6 h, and the cooled hydrolysate was filtered and evaporated to dryness by nitrogen gas at 40–45°C.…”

Section: Methodsmentioning

confidence: 99%

“…Total amino sugar content was calculated as the sum of GluN, GalN and MurA. Fungal, bacterial and total microbial necromass C were calculated as follows (Liang et al, 2019; Zhou, Zhang, et al, 2022):

\begin{matrix} left Fungal necromass normalC ()(, normalg / kg sediment) goodbreak= \\ left ()(, GluN / 179.2 - 2 goodbreak\times MurA / 251.2) goodbreak\times 179.2 goodbreak\times 9; \end{matrix}

Bacterial necromass normalC ()(, normalg / kg sediment) goodbreak= MurA goodbreak\times 45;

\begin{matrix} left Total necromass normalC ()(, normalg / kg sediment) goodbreak= Fungal necromass normalC \\ left goodbreak+ Bacterial necromass normalC . \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

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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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Bedrock and climate jointly control microbial necromass along a subtropical elevational gradient

Zeng

Zhu

et al. 2023

Applied Soil Ecology

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Intensified rainfall in the wet season alters the microbial contribution to soil carbon storage

Cited by 13 publications

References 79 publications

Enhanced abundance of generalist and litter saprotrophs explain increased tropical forest soil carbon with long‐term nitrogen deposition

Enhanced abundance of generalist and litter saprotrophs explain increased tropical forest soil carbon with long‐term nitrogen deposition

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

Bedrock and climate jointly control microbial necromass along a subtropical elevational gradient

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