The response of soil organic carbon sequestration to organic materials addition in saline-alkali soil: from the perspective of soil aggregate structure and organic carbon component

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

Published: Jan. 6, 2025

Language: Английский

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Can environmental variables, high sampling density and machine learning deliver detailed maps of soil organic carbon and carbon stock in tropical regions?

CATENA, Journal Year: 2025, Volume and Issue: 249, P. 108718 - 108718

Published: Jan. 12, 2025

Language: Английский

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Soil labile organic carbon fractions mediate microbial community assembly processes during long‐term vegetation succession in a semiarid region

iMeta, Journal Year: 2023, Volume and Issue: 2(4)

Published: Oct. 22, 2023

Conceptual diagram for the labile organic carbon (OC) fractions mediating microbial assembly processes during long-term vegetation succession. Owing to its sparse and low soil (SOC) content, Loess Plateau is one of regions with highest (C) sequestration potential [1]. Vegetation succession a widely adopted strategy ecosystem recovery capacity rehabilitate degraded lands facilitate matter in semiarid region [2-5]. Additionally, it can influence underground community dynamics [6, 7]. The Ziwuling has undergone approximately 160 years secondary succession, making unique area complete sequence natural following farmland abandonment on [4]. Thus, this provide us better understanding patterns changes (Figure 1A Supporting Information: Table S1). Considering vital role microorganisms function, examining temporal communities crucial [8]. composition are essential function [9, 10]. Deterministic stochastic two primary ecological involved [11]. Traditionally, been regarded as being primarily influenced by deterministic processes, aligning principle that, "everything everywhere, but environment selects" [12]. Nevertheless, should not be disregarded when considering random extinctions or dispersal events [13]. Land use type also notable effect [14-16]. Stochastic have greater agricultural fields, whereas their impact diminishes forested soils, bacterial temperate grasslands [16]. Furthermore, there environmental differences between topsoil (0–20 cm) subsoil (20–40 terrestrial ecosystems [17]. Previous studies indicated that dominate assembly, drift prevailing limitation playing dominant subtropical paddy soils [18]. This indicates associations characteristics different spatial distributions, which may affect function. Although extensive research conducted process [12, 19, 20], uncertainties about remain owing resource balance strongly abiotic factors including nitrogen [19, 21, 22]. Research salt marsh plant shown fluctuations SOC exert strongest selective pressure assemblies [23]. Among eight indicators, had greatest [24]. commonly conceptualized stable C fraction storage models [25], easily oxidizable (EOC), particulate (POC), dissolved considered OC serve early indicators variation [26, 27]. In contrast, recalcitrant (ROC) mineral-associated highly [28]. functional diversity SOC, many these predominantly focused association 29, 30], leaving relationship relatively unclear. Within framework biotic cannot overlooked, could determine attributes niche occupancy 31]. Keystone taxa connected taxonomic groups play roles functionality [32]. For example, Sulfuricella, Rhodobacter, Comamonadaceae, drive mediated graphene derivatives [33]. However, keystone largely unknown ecosystems, enhancing comprehending functionality. To address issues, were selected progression explore structure, co-occurrence networks, relationships fractions. We hypothesized that: (1) stronger than because nutrient limitations, (2) given represents readily usable energy source microorganisms, likely mainly governed Long-term significantly increased accumulation 0–40 cm from pioneer weed stage onwards (p < 0.001; Figure 1B). content was higher all stages After shrubland stage, compared When reached forest (>110 years), gradually stabilized Succession age depth affected comprised phyla Proteobacteria, Actinobacteria, Acidobacteria, Gemmatimonadota, Chloroflexi 1C). Basidiomycota, Ascomycota, Mortierellomycota, Glomeromycota, Kixellomycota fungal abundances Actinobacterta, Mortierellomycota subsoil, those Chloroflexi, Ascomycota lower 0.05; relative Overall, decreased alpha communities, Chao 1 Shannon indices (Supporting S2). A combination NMDS analysis, ANOSIM, Adonis statistical tests varied 1D). Soil Tables S2 S3). along across depths investigated using null model analyses. results showed (|βNTI| > 2), especially homogeneous selection, critical bacteria fungi at both 2A–D). weaker subsoil. (homogeneous selection) later 2A,C). Drift limitations 2B,D). networks distinct each 2E–H). Edges average degree depth, demonstrating network more complex (Table S4). positive correlations cross-kingdom further explored S3), found nodes edges among climax forests S4), suggesting complexity networks. Network analysis identified genus Dongia (ASV901) amplicon variant (ASV) bacteria, genera MND1 (ASV155) MB-A2-108 (ASV266) 2E,F S5). ASVs included (ASV4), family Pezizaceae (ASV45), Fusarium (ASV136), class Sordarioclamycetes (ASV689) 2G Alternaria (ASV44), (ASV70), Filobasidium (ASV374), order Chaetothyriales (ASV250) 2H abundance negatively correlated 3A). It worth noting ASV901 correlation taxon–environment community. consisted 60 230 3B), while 44 104 3B). EOC (connection number: 42) most important closely associated EOC, POC, ROC (with connection numbers 20, respectively) linear regression reflected variations bacteria. providing suitable explanation Figures S5 S6). These demonstrated effectively explained OC. Therefore, used mediators illustrate impacts partial least squares path (PLS-PM) 3C–F). main drivers regulated affecting traits total (0.51) S7A), (−0.56) S7C). Bacterial impacted 3D,F S12). effects (0.73) (−0.97) respectively S7B,D). Microbial various life strategies generate responses, [34]. Based mineralization growth rates, classified into r- (copiotrophic, fast-growing) K-strategists (oligotrophic, slow-growing) [35]. study, shifted S8), agreement previous [36, 37]. increase ratio extracellular enzyme activity corroborates result S9 S10). produce enzymes degrade [38-40]. An unstable conducive rapid r-strategists [40], driven [39]. species reduce availability [41]. indicate community, shifts K-strategists, strengthens stability. resources, resulting ASV [42, 43]. Ecological comprising ratios negative due interactions decreasing oscillations disturbed [44, 45]. stability fungi. modularity revealed limiting losing [46]. 2E,H suggests depths. fewer perturbations maintain number nodes, edges, correlations, indicating tended stabilize stage. other generally pools [47]. Consequently, factor communities. suggest increases Clarifying [48]. dominated 2A−D). niche-based theory states structure [14]. Stronger extreme, low-resource general phenomenon [13], explains (lower βNTI) supports first hypothesis. Homogeneous selection usually determined similar conditions exerted significant forces, less expected happen chance [49]. despite still dominating consistent current views, advancement supply under weak Extreme pH acts strict filter phylogenetic clustering, regardless successional age, [50, 51]. we difference small S11), thought caused slow shift processes. importance suddenly 2A,B), related nutrients such PLS-PM driving mechanisms 3C–F S7), confirmed second an applied affects [26]. controlling they [42]. study suggested paramount increase, diminishes. βNTI supported observation pathogenic rhizosphere, decrease benefits maintenance rhizosphere [52, 53]. recognized beneficial bacterium aid pathogen resistance, Xanthomonadaceae, ensure healthy [54]. assembly. Interactions common facilitating 55]. 3C–F), conclusion attributed Some volatiles released antagonistic [56], decomposition [57]. summary, OC, regulating thereby process. illustrated fractions, Given key rather sequences. neutral hypothesis [23], highlighting non-negligible determining directly tested laboratory, so validation through controlled experiments required confirm relationship. new targeted therapy indicator microenvironment. examined cultured metagenomic metatranscriptomic approaches future studies. show drove taxa. addition, Taken together, provides insights link over long scales. Jingwei Shi Lin Yang conceived supervised study. Jiwei Li established experimental sites. Liao collected samples analyzed data. Shuo Jiao, Zhouping Shangguan, Lei Deng assisted data analysis. wrote manuscript input authors. National Natural Science Foundation China (42277471, 42307578, U2243225), Key Development Program Shaanxi Province (2021ZDLSF05-02), Funding Top Young Talents Ten Thousand Plan (2021) Forestry Grassland Administration (2020132601). authors declare no conflict interest. support findings available corresponding author upon reasonable request. DNA sequences generated Center Biotechnology Information's Gen-Bank database project accession PRJNA1022789 PRJNA1023009. scripts saved GitHub https://github.com/Shijingweisjw/iMETA-R-code. Materials (figures, tables, scripts, graphical abstract, slides, videos, Chinese translated version, updated materials) online DOI iMeta http://www.imeta.science/ Please note: publisher responsible any supporting information supplied Any queries (other missing content) directed article.

Language: Английский

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Plateau pika (Ochotona curzoniae) bioturbation triggers soil organic carbon loss by altering plant inputs and soil properties and their control on microbial composition

CATENA, Journal Year: 2025, Volume and Issue: 250, P. 108737 - 108737

Published: Jan. 25, 2025

Language: Английский

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Deciphering microbial drivers of soil organic matter mineralization in surface and subsurface soil during long-term vegetation succession

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 374, P. 109186 - 109186

Published: July 21, 2024

Language: Английский

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Soil Organic Carbon Increases With Decreasing Microbial Carbon Use Efficiency During Vegetation Restoration

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(12)

Published: Dec. 1, 2024

ABSTRACT Microbial carbon (C) use efficiency (CUE) describes the proportion of organic C used by microorganisms for anabolic processes, which increases with soil (SOC) content on a global scale. However, it is unclear whether similar relationship exists during natural vegetation restoration in terrestrial ecosystems. Here, we investigated patterns CUE along 160‐year chronosequence (from farmland to climax forest) estimated stoichiometric modeling; additionally, examined between and SOC combined these results meta‐analysis. The combination indicated that decreased from 0.35 0.28. Surprisingly, increased decreasing because forest soils have low pH values high microbial phosphorus limitations compared early ecosystems, implying forests may not sequester as much expected. shift was most important predictor climate, plant, factors. changes were directly induced pH‐induced community. Alkaline acidification tended decrease CUE. This first large‐scale estimate highlights need strengthen sink management mature sustain their sequestration potential.

Language: Английский

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Soil labile organic carbon and nitrate nitrogen are the main factors driving carbon-fixing pathways during vegetation restoration in the Loess Plateau, China

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 378, P. 109283 - 109283

Published: Sept. 12, 2024

Language: Английский

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The advantage of afforestation using native tree species to enhance soil quality in degraded forest ecosystems

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

Published: Aug. 28, 2024

Different vegetation restoration methods have improved soil quality to varying degrees. This study, focused on the forest-grassland-desert transition zone in Hebei-Inner Mongolia border region, and employed a systematic grid sampling method establish fixed monitoring plots Saihanba Mechanized Forest Farm Ulan Buh Grassland. The differences evolution across various under same climatic historical conditions were analyzed, elucidating roles of these degraded forest ecosystems, with aim providing reference for ecological similar land conditions. study used sample points transitional assessed five sites: artificial composed native species Larix principis-rupprechtii (FL), exotic Pinus sylvestris var. mongolica (FP), natural secondary broad-leaved (FN), open grassland (GO), enclosed (GC). organic carbon (SOC), total nitrogen (TN), phosphorus (TP), potassium (TK), alkaline hydrolysis (AN), rapidly available (AP) (AK) among different sites compared via variance analysis, index (SQI) was calculated assess at points. SOC, TN, AN contents significantly greater than those grassland, TP, AN, AK, SOC FL, FN, GC FP GO. Among them, highest reaching 2.74, 0.39, 47.27 g kg

Language: Английский

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Effects of cropland abandonment succession on soil microorganism and multifunctionality in the arid zone of Northwest China

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 207, P. 105954 - 105954

Published: Feb. 10, 2025

Language: Английский

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Transcriptome and Metabolome Profiling Provide Insights into Flavonoid Biosynthesis and the Mechanism of Color Formation in Zanthoxylum bungeanum Maxim.

Plants, Journal Year: 2025, Volume and Issue: 14(4), P. 558 - 558

Published: Feb. 12, 2025

The color of Zanthoxylum bungeanum Maxim. (Z. bungeanum) is a key quality indicator and factor limiting the development its industry. However, underlying mechanisms governing formation remain largely unexplored. In this study, an integrative analysis transcriptome metabolome profiles was conducted across four developmental stages to elucidate mechanism in Z. bungeanum. A total 137 flavonoids were identified as fruits ripened, with high levels differentially accumulated metabolites (DAMs), including tricetin (-)-epigallocatechin, which strongly associated formation. This suggests their significant contribution pigmentation process. Nine expressed genes (DEGs) candidate involved development. Additionally, 15 transcription factors (TFs) (12 MYB 3 bHLH) exhibited expression patterns similar those structural flavonoid biosynthetic pathway, indicating role regulating synthesis. bioinformatics three synthesis genes-ZbCHI, ZbFLS, ZbANR-revealed that all proteins exhibit hydrophobic structures without transmembrane domains. Among them, ZbANR possesses signal peptide regions, whereas ZbCHI ZbFLS do not. Subcellular localization predictions suggest most likely localized chloroplast, cytoplasm, membrane. Functional analyses revealed transient Nicotiana benthamiana (N. benthamiana) increased content, overexpression producing distinct white phenotype plants. study enriches transcriptomic data provides comprehensive understanding metabolism molecular basis bungeanum, offering valuable theoretical foundation for future breeding programs.

Language: Английский

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