Linking Soil Properties and Bacterial Communities with Organic Matter Carbon During Vegetation Succession

Plants, Journal Year: 2025, Volume and Issue: 14(6), P. 937 - 937

Published: March 17, 2025

Land use change driven by vegetation succession significantly enhances soil carbon storage, yet the microbial mechanisms underlying this process remain poorly understood. This study aims to elucidate mechanistic linkages between bacterial community dynamics and organic matter stabilization across four stages on Loess Plateau: abandoned farmland (AF), grassland stage (GS), shrub-land (SS), forest (FS). We analyzed (SOM_C) fractions, physicochemical properties, communities (16S rRNA sequencing), employing structural equation modeling quantify causal pathways. The results showed that content of total (TOM_C), labile (LOM_C), dissolved (DOM_C), biomass (MBC) increased progressively with succession, peaking in FS, 23.87 g/kg, 4.13 0.33 mg/kg, 0.14 respectively. Furthermore, also led heterogeneity structure. number operational taxonomic units (OTUs) for was 9966, 13,463, 14,122, 10,413, showcasing highest OTUs. Nine taxa were strongly correlated SOM_C stabilization. Affected bacteria, properties litter directly influence SOM_C, pathway (path coefficient: 0.792, p < 0.001) having a greater impact than 0.221, 0.001). establishes not only through inputs but reshaping toward stabilize via interactions.

Language: Английский

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Impact of Forest Fires on Soil Microbial Substrate Utilization and Dehydrogenase Activity in Different Rock Types and Soil Layers

Environmental Quality Management, Journal Year: 2025, Volume and Issue: 34(4)

Published: April 22, 2025

ABSTRACT This study explored the effects of forest fires on soil microbial activity in soils classified by rock origin (igneous, metamorphic, and sedimentary) stratified subsoil depth (topsoil, subsoil). Microbial activity, indicated average well color development (AWCD) Shannon diversity indices, was higher undamaged topsoils compared to fire‐damaged ones. In contrast, subsoils, particularly metamorphic sedimentary soils, exhibited increased over time due organic matter decomposition. A significant increase substrate utilization observed across all types (* p < 0.05, ** 0.01) topsoil, with exhibiting highest based indices. The dehydrogenase followed a similar pattern, reduced topsoil but damaged subsoils. Principal component analysis (PCA) linked indicators (AWCD, index) mineral compositions like orthoclase hornblende, highlighting role chemistry shaping responses fire. These insights advance understanding fire‐induced changes functions diverse geological contexts.

Language: Английский

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Effect of plant-soil system on the restoration of community stability after wildfire in the northeast margin of Qinghai-Tibet plateau

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: May 10, 2024

Abstract Wildfires, as an environmental filter, are pivotal ecological disturbances that reshape plant communities and soil dynamics, playing a crucial role in regulating biogeographic patterns ecosystem services. In this study, we aim to explore the effects of wildfires on forest ecosystems, specifically focusing plant-soil feedback mechanisms within northeastern margin Qinghai-Tibet Plateau (QTP). Utilizing Partial Least Squares Path Modeling (PLS-PM), investigated interrelationships among physicochemical properties, enzyme activities, species diversity, community stability at varying post-fire recovery stages (5, 15, 23 years). Results indicated early stages, rapid changes properties such decreased pH ( p < 0.001) increased nutrient availability facilitate emergence successional with high resource utilization traits. As evolved toward climax community, vegetation exhibit stability. Furthermore, activities displayed dynamic corresponded content, directly influencing regeneration diversity communities. Importantly, our study documented transition influence from direct positive initial phases negative impacts later while indirect benefits accrue through activity. Vegetation composition structure changed dynamically time during succession. Plant absorption accumulation affected dynamics soil, regeneration, distribution, diversity. Our results underscore complex interactions between drive post-wildfire, highlighting resilience ecosystems fire disturbances. This contributes understanding processes offers valuable insights for management restoration fire-affected ecosystems.

Language: Английский

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Relationship between soil organic carbon fractions and microbial nutrient limitations among different woodlands in the western karst region of Hubei

Environmental Technology & Innovation, Journal Year: 2025, Volume and Issue: 38, P. 104074 - 104074

Published: Feb. 6, 2025

Language: Английский

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Responses of Soil Enzyme Activity and Microbial Nutrient Limitations to Vegetation Types in a Degraded Karst Trough Valley

Forests, Journal Year: 2025, Volume and Issue: 16(2), P. 279 - 279

Published: Feb. 6, 2025

Soil enzyme activities serve as the key indicators of microbial nutrient limitations. Vegetation types after farmland is returned modify both biological and abiotic properties soil, thereby impacting soil cycle stability forest ecosystems. However, limitations in degraded karst forests under different vegetation return remain unclear. Therefore, this study investigated physicochemical properties, activities, resource (grasslands (G), transitional grass–shrub (SG), shrubland (S), secondary (F)) returning on dip anti-dip slopes a trough valley. The relationships among factors influencing were analyzed to identify drivers limitation. results revealed that significantly greater than slopes. Total nitrogen (27.4%) bulk density (24.4%) influenced mainly activity its stoichiometric ratio, whereas carbon phosphorus impacted microorganisms F G types. characteristics accounted for 85.5% 75.6%, respectively, observed influence. Notably, total content (36.8%) erosion slope was other These factors, especially bedrock strata type, affect activity. This confirms type enhances slopes, providing scientific basis ecosystem restoration.

Language: Английский

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The addition of rhizosphere soil can affect the plant-soil-microbial nutrients of Bothriochloa ischaemum

Rhizosphere, Journal Year: 2025, Volume and Issue: unknown, P. 101042 - 101042

Published: Feb. 1, 2025

Language: Английский

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Response of Extracellular Enzyme Stoichiometric Properties and Microbial Metabolic Limitations to the Ecosystem Transition Mode Employed in Red Jujube Economic Forests on the Loess Plateau

Microorganisms, Journal Year: 2025, Volume and Issue: 13(4), P. 729 - 729

Published: March 24, 2025

Soil carbon (C), nitrogen (N), and phosphorus (P) cycling microbial metabolism limitations are key factors affecting nutrient vegetation development. Extracellular enzyme activity (EEA) plays a role in ecosystems, their activities can serve as indicators of requirements. At present, there is insufficient research on the microorganisms during ecosystem transition abandoned jujube forests Loess Plateau. Four modes were selected: forest replanted with Pinus tabulaeformis (CP), Platycladus orientalis (PO), medicinal materials (MM), alfalfa (AL). An (CK) was used control. physical chemical properties, biomass carbon, nitrogen, phosphorus, well changes β-1,4-glucosidase (BG), leucine aminopeptidase (LAP), N-acetylglucosamine (NAG), alkaline phosphatase (AP), studied. Analysis soil performed. Compared those CK treatment, C, N, P extracellular enzymes significantly increased (p < 0.05) treatments, C:NEEA, C:PEEA, N:PEEA ratios tended to decrease. Within decreased layer deepened, whereas stoichiometric ratio significant differences observed between layers. The vector model quantify revealed that surface limited mainly by C 10–20 cm 20–40 layers, N. Correlation analysis SOC, pH, MBC, MBN main activity. Mantel’s test (NAG + LAP), AP, C:PEEA important length angle. RAD properties had greater impact stoichiometry metabolic than physicochemical did. This study highlights importance determining processes enhances our understanding how ecological affect constraints Forest transformation have impacts limitation.

Language: Английский

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Influence of soil substrate availability and plant species diversity on soil microbial biomass and enzyme activity in a subalpine natural secondary forest

Journal of Soils and Sediments, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Language: Английский

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Dynamic changes in soil characteristics, enzyme activity, and microbial communities during montane riparian forest succession

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 211, P. 106158 - 106158

Published: May 7, 2025

Language: Английский

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Restoring Subtropical Forests: Alleviating P Limitation and Introducing C Limitation Using Evergreen Broad-Leaved Tree Species

Forests, Journal Year: 2024, Volume and Issue: 15(3), P. 568 - 568

Published: March 21, 2024

Determining which species to utilize for the artificial restoration of subtropical secondary forests has become a focal point in forestry and ecology. To compare effects forest model on soil microbial nutrient acquisition limitation, we examined (CKs), evergreen coniferous (GCPs), mixed broad-leaved (GCBMs), (GBMs), natural deciduous (DBMs) as research subjects. Among them, GCPs, GCBMs, GBMs were dominated by early, middle, climax stages succession, respectively. The activities stoichiometry β-1,4-glucosidase (BG), β-1,4-N-acetylglucosaminidase (NAG), leucine aminopeptidase (LAP), acid phosphatase (ACP) topsoil analyzed. results showed that type significantly affects BG LAP rather than NAG or ACP. activity DBMs was lowest, while CKs higher plantations. Furthermore, limitation microbes quantitatively analyzed using vector analysis enzyme stoichiometry. study area co-limited C P, order > P N. forests, stoichiometric ratios GCPs closest 1:1:1. From GBMs, increased, decreased. slightly lower CKs. Overall, plantations less bulk density, C/P, N/P influenced These suggest alleviated offered potential alleviating limitation. Compared with species, employing pioneer mid-successional can better achieve balanced requirements.

Language: Английский

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