The contribution of microbial necromass to soil organic carbon and influencing factors along a variation of habitats in alpine ecosystems

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 921, P. 171126 - 171126

Published: Feb. 21, 2024

Language: Английский

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Unlocking Mechanisms for Soil Organic Matter Accumulation: Carbon Use Efficiency and Microbial Necromass as the Keys

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(1)

Published: Jan. 1, 2025

Soil microorganisms transform plant-derived C (carbon) into particulate organic (POC) and mineral-associated (MAOC) pools. While microbial carbon use efficiency (CUE) is widely recognized in current biogeochemical models as a key predictor of soil (SOC) storage, large-scale empirical evidence limited. In this study, we proposed experimentally tested two predictors POC MAOC pool formation: necromass (using amino sugars proxy) CUE (by 18O-H2O approach). sampling (0-10 10-20 cm depth) was conducted along climatic transect 900 km on the Loess Plateau, including cropland, grassland, shrubland, forest ecosystems, to ensure homogeneous parent material. We found highest accumulation occurred zones MAT between 5°C 10°C or MAP 300 500 mm. Microbial more positively related than (p < 0.05), suggesting that residues may improve strongly compared pool. Random linear regression analyses showed increased with fungal C, whereas bacterial drove MAOC. coupled 0.05) but decoupled SOC > 0.05). The have faster turnover rate due lack clay protection, which lead rapid thus their decoupling from CUE. sense, driven by necromass, explains dynamics. Our findings highlight insufficiency relying solely predict bulk storage. Instead, propose should be used together explain dynamics, each influencing distinct

Language: Английский

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Bacterial and fungal diversity and species interactions inversely affect ecosystem functions under drought in a semi-arid grassland

Microbiological Research, Journal Year: 2025, Volume and Issue: 293, P. 128075 - 128075

Published: Jan. 22, 2025

Language: Английский

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Patterns and determinants of plant- and microbial-derived carbon in desert riparian ecosystems: Implications for organic C accumulation

CATENA, Journal Year: 2025, Volume and Issue: 250, P. 108789 - 108789

Published: Feb. 7, 2025

Language: Английский

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Response of Soil Phage Communities and Prokaryote–Phage Interactions to Long-Term Drought

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Soil moisture is a fundamental factor affecting terrestrial ecosystem functions. In this study, microscopic enumeration and joint metaviromic metagenomic sequencing were employed together to investigate the impact of prolonged drought on soil phage communities their interactions with prokaryotes in subtropical evergreen forest. Our findings revealed marked reduction abundances prokaryotic viral-like particles, by 73.1% 75.2%, respectively, significantly altered structure under drought. Meanwhile, substantially increased fraction containing lysogenic phages 163%, as well proportion temperate phages. Nonetheless, likely amplified negative prokaryote-phage given nearly doubled links co-occurrence network, higher frequency diversity antiphage defense systems found genomes. Under drought, exerted greater top-down control typical k-strategists including Acidobacteria Chloroflexi. Moreover, phage-encoded auxiliary metabolic genes may host metabolism biosynthesis-related Collectively, study underscore profound interactions. These results also emphasize importance managing levels during amendment microbiome manipulation account for influence

Language: Английский

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Plant species richness mediates the responses of microbial necromass carbon accumulation to climate aridity in alpine meadows

Journal of Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Abstract Plant diversity loss caused by climate change decreases soil organic carbon (SOC) sequestration, but the mechanism involved remains unclear. Investigating changes in microbial necromass (MNC) accumulation along a climate–plant species gradient can help clarify this mechanism, as it is crucial for stability of SOC. We conducted large‐scale sampling across 2500‐km transect through grasslands on Tibetan Plateau to investigate MNC content and its contribution SOC at depths 0–20 20–40 cm response environmental plant gradients. richness, biomass, proportion above‐ground biomass accounted Cyperaceae (sedges) increased with decreasing aridity rising altitude. Meanwhile, content, SOC, ratio fungal bacterial both layers also aridity. These results indicate that, addition changing factors altitudinal gradient, richness plays pivotal role facilitating thus accrual Structural equation modelling revealed that increases enhancing abundance grassland. A higher significantly root level rhizodeposition, thereby increasing activity microbes, ultimately MNC. Synthesis . conclude dominate Plateau. findings demonstrate importance incorporating into conservation efforts mitigate negative impacts human activities

Language: Английский

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Bacterial necromass carbon of inland wetlands is regulated by bacterial diversity and community composition while fungal necromass carbon is mainly affected by community composition

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115860 - 115860

Published: Feb. 1, 2025

Language: Английский

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Combined effects of multifactorial drivers on soil organic carbon retention: the underestimated role of reactive minerals in arid ecosystems

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

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Does slope cropland to natural and artificial conversion change patterns of soil moisture–carbon trade-offs in time and depth on the water-scarce Loess Plateau, China?

Agriculture Ecosystems & Environment, Journal Year: 2025, Volume and Issue: 385, P. 109583 - 109583

Published: Feb. 24, 2025

Language: Английский

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Long-term phosphorus addition enhances the contributions of plant lignin and microbial necromass to soil organic carbon in a rice–wheat rotation

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 209, P. 106010 - 106010

Published: March 10, 2025

Language: Английский

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