Applied Soil Ecology最新文献

{"title":"Aging or degradation? Transformation mechanisms of microplastics in soil environments","authors":"Xingyu Zhong ,&nbsp;Liyuan Qiang ,&nbsp;Jinping Cheng ,&nbsp;Zhihang Sun ,&nbsp;Huibing Hu ,&nbsp;Han Liu ,&nbsp;Ruoyu Zhang","doi":"10.1016/j.apsoil.2025.106394","DOIUrl":"10.1016/j.apsoil.2025.106394","url":null,"abstract":"<div><div>Soil serves as a primary sink for microplastics. This review explicitly focuses on the mechanisms underlying microplastic aging and degradation in soil environments, and the ecological toxicity arising from microplastic transformation. The fragmentation processes of different microplastics depend on the characteristics of their mechanical dynamics and microstructures. Mechanical disruption can result in surface cracking, fragmentation, and subsequent formation of smaller microplastic particles. Exposure to ultraviolet and infrared radiation under natural sunlight can accelerate the embrittlement, stiffening, and eventual fragmentation of microplastics. Thermal degradation of microplastics primarily involves high temperature facilitating the dissociation of chemical bonds between polymer molecules. This process is similar to photodegradation that refers to oxidative reactions following the breakage of polymer chains. The humidity stability of microplastics is influenced by the hydrophilicity of their functional groups. Microplastics that enter the soil environment undergo aging and degradation due to the chewing action of soil fauna and enzymatic erosion within their digestive tracts. The causal relationship between microplastic aging and degradation is further explored, providing a comprehensive understanding of how microplastics transform under soil conditions. This work supplements targeted data on microplastic behavior in soil ecosystems and establishes a foundation for studies on microplastic pollution management in terrestrial environments.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106394"},"PeriodicalIF":5.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From active biomarkers to legacy effects: Linking microbial life strategies to carbon sequestration in alpine grassland restoration","authors":"Xianzhi Deng ,&nbsp;Jie Shen ,&nbsp;Yanbao Lei ,&nbsp;Meiqun Sheng ,&nbsp;Juan Xue ,&nbsp;Yuanjiang Yao ,&nbsp;Geng Sun","doi":"10.1016/j.apsoil.2025.106440","DOIUrl":"10.1016/j.apsoil.2025.106440","url":null,"abstract":"<div><div>Alpine grassland restoration is critical for soil organic carbon (SOC) sequestration, yet microbial mechanisms underlying SOC accumulation in moisture-heterogeneous ecosystems remain unclear. We investigated microbial-driven SOC dynamics along restoration chronosequence in arid and humid alpine grasslands through integrated biomarker analysis (amino sugars, glomalin-related soil proteins [GRSP], phospholipid fatty acids [PLFA], and enzymes). Results revealed distinct moisture-dependent carbon trajectories: linear SOC gain in arid grassland versus multiphase dynamics with SOC decline in humid grassland. Notably, amino sugars (arid: 5.4–7.7 %; humid: 3.0–6.9 %) were greater contributors to SOC than GRSP (&lt;1.2 %). In arid grasslands, fungal necromass dominated SOC accrual driven by hydrolase and fungal proliferation, which evidenced by elevated fungal-to-bacterial (F/B) ratio and GluN/MurA ratios exceeding 13. Conversely, humid grasslands exhibited unimodal microbial succession, shifting from R- to r- and reverting to R-strategies, reflected in V-shaped F/B and gram-positive to gram-negative (GP/GN) ratios. Random forest and partial least squares path modeling analyses consistently identified moisture-driven SOC pathways: amino sugars strongly correlated with SOC in arid soils, with path coefficient ranging from 0.65 to 0.74, while GRSP dominated humid alpine systems (ranging from 0.47 to 1.37). We propose a dual-pathway SOC sequestration model: fungal necromass stabilization in arid alpine grassland versus bacterial-fungal-GRSP synergy optimizing nutrient cycling in humid soils. These findings advance the “microbial carbon pump” framework by integrating moisture-dependent necromass and GRSP dynamics, guiding climate adaptive restoration strategies for alpine grasslands.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106440"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earthworm impacts on soil carbon storage: the importance of quantifying all drilosphere compartments","authors":"Hoang Xuan Dang ,&nbsp;Quang Van Pham ,&nbsp;Tien Minh Tran ,&nbsp;Cornelia Rumpel ,&nbsp;Nicolas Bottinelli","doi":"10.1016/j.apsoil.2025.106448","DOIUrl":"10.1016/j.apsoil.2025.106448","url":null,"abstract":"<div><div>Earthworms play a key role in soil organic carbon (SOC) dynamics. Yet few studies have quantified SOC accumulation in specific drilosphere compartments as affected by different earthworm species and their interaction. The aim of this study was to determine the effects of the tropical species <em>Amynthas zenkevichi</em> (burrower) and <em>Pontoscolex corethrurus</em> (shallow bioturbator) on SOC accrual in the drilosphere, comprising surface casts, belowground casts, and burrow walls, over a three-month period under controlled laboratory conditions. Buffalo dung was provided as a surface food source. X-ray computed tomography combined with bulk density measurements were used to estimate the mass of burrow walls and belowground casts. Drilosphere compartments and surrounding soil were collected manually at the end of the experiment. Their SOC stocks and the incorporation of dung-derived carbon were quantified. Total SOC stocks in earthworm mesocosms were compared to those of control mesocosms without earthworms.</div><div>Although the drilosphere mass was similar between species, <em>A. zenkevichi</em> produced a higher mass of surface casts, whereas in <em>P. corethrurus</em> treatments more mass was allocated to burrow walls and belowground casts. Dung-derived carbon was more incorporated into casts than into burrow walls, with both species showing similar incorporation rates. For both species, SOC stocks in the soil mesocosms increased by 7 % relative to the control, with the majority of SOC stored in surface casts and burrow walls. In mixed species treatments, synergistic effects were observed with SOC stocks exceeding additive expectations derived from single species treatments by 3 %. Our findings highlight that two earthworm species belonging to contrasting functional groups have similar positive effects on SOC accrual in the drilosphere compartments and that their interspecific interactions may further enhance SOC stocks.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106448"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhizosphere properties in salt marshes are shaped by both soil genetic horizons and halophyte species","authors":"Andrea Salvucci ,&nbsp;Valeria Cardelli ,&nbsp;Dominique Serrani ,&nbsp;Lorenzo Camponi ,&nbsp;Chiara Ruspi ,&nbsp;Debora Casagrande Pierantoni ,&nbsp;Laura Corte ,&nbsp;Gianluigi Cardinali ,&nbsp;Flavio Fornasier ,&nbsp;Stefania Cocco ,&nbsp;Giuseppe Corti","doi":"10.1016/j.apsoil.2025.106449","DOIUrl":"10.1016/j.apsoil.2025.106449","url":null,"abstract":"<div><div>Salt marshes are harsh ecosystems due to seawater intrusion that causes waterlogging and salt accumulation in soil. Halophytes are the primary species able to resist these stress conditions by impacting physicochemical and biological properties of the rhizosphere. This study investigated how properties of soil genetic horizons affect soil enzyme activities under two halophytes (<em>Arthrocaulon macrostachyum</em> and <em>Juncus maritimus</em>) and examined changes in bulk and rhizosphere soil properties under salt and hypoxia stress. Results indicated that organic matter was the primary driver of biological activity in the superficial horizon (Az), particularly under <em>J. maritimus</em>. This is supported by the elevated enzyme activity recorded under this halophyte, which corresponded with higher levels of total organic carbon and its fractions content. In contrast, <em>A. macrostachyum</em> mitigated salinity stress by reducing salt accumulation in the Az horizon compared to <em>J. maritimus</em>, showing a threefold decrease in the content of cations and anions. The anoxic conditions caused by the rising water table reduced biochemical processes in the bulk soil of Bgz horizon under both plant species compared to the rhizosphere. In response, plants enhanced potential enzyme activity in the rhizosphere (on average, three times higher than bulk soil), likely due to plant-soil gas exchange mechanisms. In contrast, the decrease in root abundance and coarser soil texture of the 2Bgz horizon regulated the chemical and biochemical behaviour of the horizon itself. Overall, halophyte adaptability to harsh conditions such as those in salt marshes is influenced by numerous factors, including a significant association with soil genetic horizon properties and plant species. Therefore, assessing soil by genetic horizons rather than fixed depths facilitates a more accurate understanding of tolerance mechanisms under field conditions.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106449"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of micro/nanoplastics on pea growth and nitrogen dynamics: The role of biodegradable and conventional plastics","authors":"Maoshan Xiong ,&nbsp;Xu Zhou ,&nbsp;Aiyun Guo ,&nbsp;Jian Zhang","doi":"10.1016/j.apsoil.2025.106445","DOIUrl":"10.1016/j.apsoil.2025.106445","url":null,"abstract":"<div><div>Unlike conventional micro/nanoplastics (M/NPs), biodegradable M/NPs can increase carbon content in soil and alter microbial functionality, which may differentially affect nitrogen regulation in leguminous plants. To date, their impact on nitrogen dynamics and plant growth in pea plants remains unclear. Therefore, this study aims to assess the roles of biodegradable and conventional M/NPs in nitrogen transformation and plant growth within the pea-soil system, and to elucidate the underlying microbial mechanisms governing nitrogen dynamics. Through pot experiments, the effects of conventional plastics (polypropylene and low-density polyethylene) and biodegradable plastic (PLA), in two particle sizes (150 μm and 500 nm), on pea growth and soil-pea nitrogen variation were systematically studied. Results revealed that PLA M/NPs exhibited a growth-promoting effect, increasing fresh weight by 46.89 %–98.54 % and dry weight by 30.41 %–104.96 % compared to CK, with more pronounced effects than conventional plastics. Micro-PLA treatment significantly increased total nitrogen and NH₄⁺-N content in the soil by 10.86 % and 173.03 %, respectively, while nano-PLA treatment increased these two nitrogen forms by 20.84 % and 73.85 %, respectively. Metagenomic analysis revealed PLA-induced restructuring of nitrogen-cycling microbiota, particularly nano-PLA enrichment of nitrogen-fixing Pseudomonadota. Functional gene analysis demonstrated that micro-PLA significantly up-regulated nitrogen fixation genes (<em>nifK</em> and <em>nifH</em>). Partial least squares path models showed that PLA M/NPs regulated nitrogen cycling-related microbial communities and functional genes by altering soil properties and ultimately affected pea growth. This research reveals the unexpected benefits of PLA M/NPs in promoting soil nitrogen fixation and pea development, offering new perspectives for sustainable agricultural development and environmental management.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106445"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicting the effects of microplastics on soil properties using machine learning","authors":"Xudong Xu,&nbsp;Wenhao Li,&nbsp;Yuning Wang,&nbsp;Xu Zhao,&nbsp;Yu Wang,&nbsp;Lei Wang,&nbsp;Hongwen Sun,&nbsp;Chunguang Liu","doi":"10.1016/j.apsoil.2025.106427","DOIUrl":"10.1016/j.apsoil.2025.106427","url":null,"abstract":"<div><div>Microplastics (MPs) are widely distributed in soils, posing a significant threat to the health of soil ecosystems. MPs can affect soil properties, including physicochemical characteristics and microbial communities. However, predicting the impacts of MPs on soil is challenging due to the variability in experimental conditions and the diversity of soil types. Based on the data collected from peer-reviewed literatures, this study predicted the impacts of MPs on soil properties using machine learning. After PyCaret's integrated model evaluates the current mainstream models, it was found that the CatBoost regression model is the most suitable for this dataset under multi-index evaluation, demonstrating high predictive accuracy with R² values exceeding 0.8. Feature importance analysis revealed that dissolved organic carbon (DOC), nitrate nitrogen (NO₃⁻-N), and available phosphorus are the most affected soil properties, with MP size and the exposure time in soil being the most influential factors. As exposure time increases, key soil fertility indicators—such as DOC, ammonium nitrogen (NH₄⁺-N), and available phosphorus—show a significant decline, while pH and microbial indicators increase. This indicates that the long-term presence of MPs in the soil may lead to a reduction in soil fertility. Overall, our study successfully establishes a predictive model for analyzing and predicting changes in soil caused by MPs, providing valuable technical support for assessing the impact of MPs on soil properties.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106427"},"PeriodicalIF":5.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal regime-dependent behaviour of soil toxic elements and microbiota under mineral mix-amended phytostabilisation","authors":"Aurelia Blazejczyk ,&nbsp;Mariusz Z. Gusiatin ,&nbsp;Agnieszka Cydzik-Kwiatkowska ,&nbsp;Anna Źróbek-Sokolnik ,&nbsp;Andrzej Białowiec ,&nbsp;Algirdas Radzevičius ,&nbsp;Raimondas Šadzevičius ,&nbsp;Midona Dapkienė ,&nbsp;Karolis Paskačimas ,&nbsp;Martin Brtnicky ,&nbsp;Andrzej Brandyk ,&nbsp;Maja Radziemska","doi":"10.1016/j.apsoil.2025.106453","DOIUrl":"10.1016/j.apsoil.2025.106453","url":null,"abstract":"<div><div>This is the first study to provide insights into the effects of a halloysite-diatomite-based (HD) mineral amendment on <em>Lolium perenne</em> L. grass cultivated with a native microbiome in heavily multimetal-impacted soil, specifically regarding grass growth, microbial activity, soil processes, and the behaviour of potentially toxic elements (PTEs: Cd, Ni, Cu, Pb). Two lab-scale, place-specific thermal regimes were applied: a warmer glasshouse (15–25 °C) and a colder freeze-thaw chamber (FTC; −20–20 °C). Firstly, (i) unenriched vs. HD-enriched soils were separately compared within each thermal regime. Secondly, (ii) for each soil type separately, glasshouse vs. freeze-thaw regimes were compared. These comparisons were made to (i) evaluate the effect of soil enrichment under different thermal conditions and (ii) assess the warm-to-cold (W-to-C) temperature transition for each soil type. The HD-based amendment enhanced metal adsorption, particularly under the freeze-thaw (Ni &gt; Pb &gt; Cu &gt; Cd). In the glasshouse, HD increased mobile Ni (7 % → 15 %) but decreased Cu (9 % → 4 %), with minor Pb/Cd changes. Freeze-thaw stabilised Cu, Pb, and Cd, while Ni remained mobile. The W-to-C temperature transition in HD-enriched soils enhanced Cu/Ni adsorption, unaffected Cd, and slightly decreased Pb. Unenriched soils showed sharp drops in mobile Cd (56 % → 25 %) and Pb (9 % → 4 %), with modest Ni/Cu changes. A similar trend appeared in HD-enriched soils. Freeze-thaw increased copiotrophic taxa, while HD promoted <em>Prochlorococcus</em> and <em>Pseudoxanthomonas</em>, mitigating freeze-thaw stress for certain microbial taxa. These findings establish seasonal shifts as a critical driver in reducing soil pollution and enhancing soil functioning.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106453"},"PeriodicalIF":5.0,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combining biochar, plant growth-promoting rhizobacteria, and annual ryegrass for the recovery of a PTEs multi-contaminated soil","authors":"Maria Vittoria Pinna ,&nbsp;Stefania Diquattro ,&nbsp;Valeria Ventorino ,&nbsp;Giuseppina Magaraci ,&nbsp;Ida Romano ,&nbsp;Matteo Garau ,&nbsp;Carlo Porfido ,&nbsp;Matteo Spagnuolo ,&nbsp;Pier Paolo Roggero ,&nbsp;Giovanni Garau ,&nbsp;Paola Castaldi","doi":"10.1016/j.apsoil.2025.106447","DOIUrl":"10.1016/j.apsoil.2025.106447","url":null,"abstract":"<div><div>Phytoremediation is a sustainable, environmentally friendly and low-cost technology for the restoration of soils contaminated with potentially toxic elements (PTEs). We hypothesized that the effectiveness of the recovery process can be improved by associating phytoremediation with the application to the soil of amendments and/or the inoculum of plant growth-promoting rhizobacteria (PGPR). The aim of this study was therefore to assess the suitability of combining a new microbial consortium with biochar for the remediation of a soil contaminated with Cd (22.6 mg·kg⁻¹), Pb (4473 mg kg⁻¹) and Zn (3147 mg kg⁻¹) and cultivated with annual ryegrass (<em>Lolium rigidum</em>). In the biochar treated-soil, the amounts of exchangeable PTEs were reduced by 56, 60 and 81 % for Cd, Pb and Zn respectively, compared to the untreated soil. Dehydrogenase and urease activities increased in the amended soil compared to the control, while β-glucosidase decreased in the presence of biochar. Soils treated with PGPR alone or in combination with biochar showed the lowest bacterial and fungal diversity, showing that the microbial inoculum was the main factor influencing the structure of the soil microbiota. The highest biomass production of ryegrass was detected in plants grown in soil treated with biochar and inoculated with PGPR (+31 % vs. control), suggesting a synergistic effect of the treatments in improving plants growth. A reduced PTEs uptake was also recorded in plants grown in soil treated with biochar and inoculated with PGPR. These results highlighted that PGPR significantly increased the effectiveness of biochar in the assisted phytoremediation.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106447"},"PeriodicalIF":5.0,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultraviolet radiation effects on biodegradation depend on precipitation amount, litter quality, and time in an arid land","authors":"Yalan Liu ,&nbsp;Lei Li ,&nbsp;Zhihao Zhang ,&nbsp;Xiangyi Li ,&nbsp;Ailin Zhang ,&nbsp;Shiqi Wang","doi":"10.1016/j.apsoil.2025.106451","DOIUrl":"10.1016/j.apsoil.2025.106451","url":null,"abstract":"<div><div>Although the effects of ultraviolet (UV) radiation on litter decomposition rates are well-documented, the influence of UV radiation on biodegradation and its relative importance to litter decomposition under elevated precipitation in arid regions remain unclear. Here, we conducted a 12-month experiment to examine the effects of UV radiation and precipitation on litter decomposition and microbial community properties, including mass loss and element dynamics, enzyme activities, and microbial biomass, diversity, and community composition. Results showed that UV radiation and precipitation accelerated litter decomposition, with their effects on biodegradation dependent on season and litter type. In the summer, UV radiation exerted photo-inhibitory effects on biodegradation, reducing bacterial biomass (particularly the relative abundance of UV-sensitive taxa), diversity, and enzyme activities. In contrast, precipitation enhanced biodegradation by increasing these factors. However, in the winter, UV radiation exerted photo-facilitatory effects on biodegradation by promoting bacterial and fungal biomass (particularly the relative abundance of UV-resistant taxa) and enhancing lignocellulolytic enzyme activities. Precipitation continued to enhance biodegradation by facilitating the production of fungal biomass and phenol oxidase enzyme activity. Moreover, litter mass loss and most microbial community properties were higher in the high-quality litter. Subsequently, effect size analysis revealed that, while precipitation did not alter the relative importance of UV radiation to litter mass loss, it decreased photo-inhibitory effects in the summer and photo-facilitatory effects of UV radiation on biodegradation in the winter. Interestingly, interactions between UV radiation and litter type amplified the photo-facilitatory effect of UV radiation on decomposition and microbial activity in high-quality litter during the winter. Overall, our results show that the relative abundance of specific bacterial taxa primarily drives litter biodegradation, and that increased precipitation and litter quality significantly modify photodegradation-biodegradation interactions by shifting these key microbial groups. Future studies should encompass a broader diversity of ecosystems to enhance the generalizability of the findings.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106451"},"PeriodicalIF":5.0,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co-occurrence networks dominated by rare and abundant fungal species influence the potential function of fungal communities in Eucalyptus urophylla plantations under successive planting","authors":"Yuting Yang ,&nbsp;Aoyu Ling ,&nbsp;Lingyue Zhu ,&nbsp;Qinzhan Wu ,&nbsp;Kangting Huang ,&nbsp;Dexu Zhang ,&nbsp;Zhengye Wang ,&nbsp;Zuoyu Qin ,&nbsp;Lichao Wu ,&nbsp;Jian Tang","doi":"10.1016/j.apsoil.2025.106421","DOIUrl":"10.1016/j.apsoil.2025.106421","url":null,"abstract":"<div><div>The successive planting of <em>Eucalyptus urophylla</em> significantly disturbs soil fungal community composition. However, little is known about how abundant and rare species, the main contributors to community composition, are affected by the above planting pattern. We aim to investigate the abundant and rare fungal taxa affected by the successive planting of <em>E. urophylla</em> and identify the driving factors affecting them. First-to-fourth generations of <em>E. urophylla</em> plantations and a broad-leaved forest were established in Guangxi State Daguishan Forest Farm in southern China. We used co-occurrence network analysis to identify key taxa and employed partial least squares path modeling to reveal the main driving force affecting them. Results showed that successive planting altered rare fungi in the soil. Compared with abundant species, rare species had a higher average degree and betweenness centrality, in which saprophytes occupy important nodes but some pathogenic fungi also exhibited a marked upward trend with increasing planting generations. <em>Umbelopsis</em> and <em>Russula</em> were symbiotrophs and decreased significantly with successive planting. The concentrations of total potassium (TK) and available boron in the soil, as well as pH, were important driving factors that directly affected the key taxa. Our results suggest that the successive planting of <em>E. urophylla</em> disturbed the primitive status of rare fungi. The function of the fungal community tended to change with the decrease in symbiotic fungi and increase in saprophytic and pathogenic fungi. Based on the above research, the sustainable management of <em>Eucalyptus urophylla</em> plantations should regulate soil pH and potassium content, reduce excessive soil disturbance, and retain harvest residues to restore the balance of fungal communities and alleviate successive planting obstacles.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"215 ","pages":"Article 106421"},"PeriodicalIF":5.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}