Effect of soil flooding and drying on the metabolic pathways of CO2 fixing microorganisms along an elevation gradient in the Three Gorges Reservoir drawdown area DOI
Shengman Zhang, Zi-Yuan Zhang,

Xueping Chen

et al.

Soil Use and Management, Journal Year: 2024, Volume and Issue: 40(1)

Published: Jan. 1, 2024

Abstract The construction of dams and subsequent water level fluctuations significantly alters the environmental conditions reservoir ecosystems, affecting metabolic pathways CO 2 fixing microorganisms (CFMs) carbon storage in drawdown areas. We investigated response soil bacterial communities fixation to periodic flooding drying at different elevations by collecting surface samples (0–10 cm) area Three Gorges Reservoir. results show that increased complexity co‐occurrence networks. identified reductive citrate cycle (rTCA cycle), dicarboxylate‐hydroxybutyrate (DC/4‐HB 3‐Hydroxypropionate (3‐HP cycle) pentose phosphate (Calvin as main pathways. Notably, inundation duration increased, abundance Calvin its key gene ( cbb L) gradually decreased. also found moisture, pH organic components affected composition These findings elucidate evolutionary trends impacts on microbial‐mediated cycling processes because dam construction.

Language: Английский

Insights into relationships between polycyclic aromatic hydrocarbon concentration, bacterial communities and organic matter composition in coal gangue site DOI

Yuman Wu,

Beidou Xi, Fei Fang

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 236, P. 116502 - 116502

Published: July 3, 2023

Language: Английский

Citations

16
Effects of different restored vegetation on soil organic carbon pools in subtropic erosive lands: Insights from stable carbon isotopes DOI
Yiyue Chen, Zetao Dai, Shengchang Yang

et al.

Forest Ecology and Management, Journal Year: 2024, Volume and Issue: 564, P. 122040 - 122040

Published: May 31, 2024

Language: Английский

Citations

4
Organic fertilizer intensifies the vertical heterogeneity of DOM in paddy fields through interactions with soil minerals DOI
Yi Xiao, Rong Huang,

Weiliang Xiong

et al.

Soil and Tillage Research, Journal Year: 2025, Volume and Issue: 248, P. 106454 - 106454

Published: Jan. 18, 2025

Language: Английский

Citations

0
Dissolved organic matter fosters core mercury-methylating microbiomes for methylmercury production in paddy soils DOI Creative Commons
Qiang Pu,

Bo Meng,

Jen‐How Huang

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(6), P. 1543 - 1556

Published: March 24, 2025

Abstract. Methylmercury (MeHg), accumulated in rice grains, is highly toxic for humans. Its production largely driven by microbial methylation paddy soils; however, dissolved organic matter (DOM) a critical component of the soil biogeochemistry process, yet its interactions with microorganisms involved MeHg remain poorly understood. Here, we conducted hgcA gene sequencing and genome-resolved metagenomic analysis to identify core Hg-methylating microbiomes investigate effect DOM on soils across Hg contamination gradient. In general, communities varied degree soils. Surprisingly, microbiome was identified that exclusively associated concentration. The partial Mantel test revealed strong linkages among composition, DOM, Structural equation models further indicated composition significantly impacted concentration, contributing 89 % observed variation, while plays crucial role determining accounting 65 %. These results suggested regulates altering microbiomes. presence various genes carbon metabolism metagenome-assembled genome suggests different stimulates activity methylate Hg, which confirmed pure incubation experiment Geobacter sulfurreducens PCA (a microorganism) amended natural solution extracted from investigated Overall, simultaneously changes functional thus enhances

Language: Английский

Citations

0
Molecular insights into the chemodiversity of dissolved organic matter and its interactions with the microbial community in eco-engineered bauxite residue DOI

Youfa Luo,

Yulu Chen,

Zuyan Wan

et al.

Chemosphere, Journal Year: 2023, Volume and Issue: 330, P. 138755 - 138755

Published: April 21, 2023

Language: Английский

Citations

10
The Relationship Between Soil Organic Matter Composition and Soil Enzymes Activities in Various Land Use Types in the Upper Watershed of Danjiangkou Reservoir in China DOI Creative Commons

Guangyu Wang,

Xiaofeng Tang, Qingwei Zhang

et al.

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

ABSTRACT Soil organic matter (SOM) was the primary component of global terrestrial carbon sink. enzymes were important drivers soil metabolism facilitating materials cycling and energy flow in soils. However, relationship between SOM composition various land use types had not been clearly understood. In current study, pyrolysis gas chromatography/mass spectrometry (Py‐GC/MS) used to analyze three (grassland, forest, cropland) enzyme activity upper watershed Danjiangkou Reservoir China. The C‐cycling glucosidase, cellobiose glycosidase, xylosidase, P‐cycling alkaline phosphatase, N‐cycling leucine aminopeptidase grassland highest but S‐cycling methylumbelliferryl sulfate potassium salt lowest grassland. forest. Aliphatic (23.1%–25.1%), N‐compounds (16.69%–21.17%), aromatic (11.76%–12.61%) most abundant components complexity molecular network forest highest. Additionally, all acetylglucosaminidase significantly positively related proportion polysaccharides negatively terpenoids. Our study emphasized that affected activities further revealed difference uses probably nitrogen‐containing compounds, polysaccharides, terpenoids SOM.

Language: Английский

Citations

0
Ecological restoration of degraded lands with alternate land use systems improves soil functionality in semiarid tropical India DOI

Hansa Baradwal,

Avijit Ghosh, Awanish Kumar

et al.

Land Degradation and Development, Journal Year: 2022, Volume and Issue: 33(7), P. 1076 - 1087

Published: Feb. 10, 2022

Abstract To test the applicability of alternate land use systems for improving soil functionality in restored ecologies, soils were sampled from 0–15, 15–30 and 30–45 cm deep layers Leucaena leucocephala (LL), Hardwickia binata (HB), Emblica officinalis (EO), Azadiracta indic a (AI)‐based silviculture systems; Acacia nilotica ‐based silvipasture (AN); natural grassland (NG). These compared with samples fallow (F). They evaluated their carbon management index (CMI), nutrient supply capacity (NSC), (SF), ecorestoration efficiency (ERE) 21‐day cumulative microbial respiration (CO 2 ‐21) to assess semiarid India. Soil functional diversity as impacted by restoration have remained largely overlooked. The LL had ~12, 7 11% higher CMI than layers. ERE was ~ 55, 65 79% layers, respectively. However, surface layer poorer subsequent all systems. LL, HB AN improved NSC SF by: a) 2.5‐, 2.2‐ 1.6‐times; b) 9.3‐, 5.3‐ 5.1‐times over layer. A similar trend observed lower topsoil >16% mean values ~4.2‐, 2.3‐ 1.9‐times CO ‐21 top positively correlated but could not predict well. Hence, legume tree‐based tactics might be useful regions.

Language: Английский

Citations

16
Interactions between soil organic matter chemical structure and microbial communities determine the spatial variation of soil basal respiration in boreal forests DOI
Yan Yang, Shulan Cheng, Huajun Fang

et al.

Applied Soil Ecology, Journal Year: 2022, Volume and Issue: 183, P. 104743 - 104743

Published: Nov. 24, 2022

Language: Английский

Citations

16
Microbial phylogenetic relatedness links to distinct successional patterns of bacterial and fungal communities DOI
Qiang Lin, Francisco Dini‐Andreote, Travis B. Meador

et al.

Environmental Microbiology, Journal Year: 2022, Volume and Issue: 24(9), P. 3985 - 4000

Published: March 2, 2022

Summary The mechanisms underlying microbial community dynamics and co‐occurrence patterns along ecological succession are crucial for understanding ecosystem recovery but remain largely unexplored. Here, we investigated taxa in bacterial fungal communities across a well‐established chronosequence of post‐mining lands spanning 54 years recovery. Bacterial structures became increasingly phylogenetically clustered with soil age at early successional stages varied less later stages. phylogenetic were determined by the changes vegetation cover succession. did not significantly correlate age, properties or cover, mainly attributed to stochastic processes. Along succession, common decrease complexity average pairwise distances between co‐occurring bacteria implied potential cooperation. increased was independent relatedness fungi. This study provides new sights into

Language: Английский

Citations

15
Differences in dissolved organic matter and analysis of influencing factors between plantations pure and mixed forest soils in the loess plateau DOI Creative Commons

Yongxia Meng,

Peng Li,

Lie Xiao

et al.

Frontiers in Forests and Global Change, Journal Year: 2024, Volume and Issue: 7

Published: April 8, 2024

The dissolved organic matter (DOM) in forest ecosystems significantly impacts soil carbon cycling due to its active turnover characteristics. However, whether different plantation profiles exhibit distinct DOM characteristics remains unclear. Hence, utilizing fluorescence spectroscopy and the parallel factor analysis (PARAFAC) method, a 1-meter profile was carried out on three artificial forests ( Pinus tabuliformis (PT), Quercus crispula (QC), mixed of PT QC (MF)), concurrently assessing impact chemical properties enzyme activity (DOM). findings indicated that mean concentration (DOC) greatest MF lowest PT, exhibiting considerable variation with depth, suggesting tree species may promote discharge matter. spectra revealed two peaks: humic-like peaks (Peaks A C) protein-like peak (Peak T), most intense observed soil. As depth increased, intensity Peaks C steadily declined, while Peak T rose. Four components were identified types plantations forests: surface dominated by humic acid-like fluorescent (C1 C2), deep primarily characterized (C3 C4). Different parameter indices source (i.e., 0–20 cm) mainly allochthonous inputs, whereas, 60–100 cm), it autochthonous, such as microbial activity. from partial least squares path modeling (PLS-PM) TP, aP, NH 4 + -N, combined enzymes influential shaping diversity attributes. Put differently, alterations concomitantly influenced classification, characteristics, depth. It has been demonstrated that, contrast monoculture forests, establishment models more advantageous enhancing These discoveries offer innovative perspectives dynamic influencing factors under planting patterns.

Language: Английский

Citations

3