Applied Soil Ecology最新文献

{"title":"Contrasting roles of abundant and rare root-associated fungi in wheat: Community assembly, heritability and agronomic impacts","authors":"Xia Kang ,&nbsp;Yuyin Zheng ,&nbsp;Zhihan Feng ,&nbsp;Minjie Yao ,&nbsp;Xiangzhen Li ,&nbsp;Dejun Han ,&nbsp;Qingdong Zeng ,&nbsp;Hao Tan ,&nbsp;Yumin Yang ,&nbsp;Jiabao Li","doi":"10.1016/j.apsoil.2025.106032","DOIUrl":"10.1016/j.apsoil.2025.106032","url":null,"abstract":"<div><div>Root-associated fungal communities of wheat have a great impact on plant health, crop productivity and quality. However, little is known about the relationships among wheat varieties, fungal communities, and wheat productivity. In this study, we analyzed fungal communities in the endosphere and rhizosphere across 95 wheat varieties during two important wheat growth stages, i.e., the regreening stage and the heading stage. The results showed that abundant and core subcommunities played a prominent role in shaping the overall fungal community composition and structure. Stochastic processes including undominated process and dispersal limitation were the main assembly mechanisms in both endosphere and rhizosphere. Rhizosphere fungi at the regreening stage contained the most low-abundance keystone taxa, which contributed to maintaining community stability and functionality. Wheat quality and yield were positively affected by rare taxa in the rhizosphere at the regreening stage. Wheat yield showed significant positive correlations with keystone taxa and Glomeromycota at the heading stage. Abundant and core taxa exhibited higher heritability than rare and non-core taxa. In the rhizosphere, abundant subcommunity was enriched with taxa of low/moderate heritability at regreening stage, while rare subcommunity recruited taxa with higher heritability at heading stage. While abundant and core taxa strongly influenced overall community structure and composition, the importance of less abundant rhizosphere species should be emphasized for the keystone status, the relationships with wheat quality/yield, and the higher heritability. This study enhances our understanding of wheat-fungal interactions and their implications for sustainable agriculture, guiding wheat breeding and management practices to improve productivity.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106032"},"PeriodicalIF":4.8,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628478","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":"Tree species influence microbiome-mediated nutrient sequestration in soil aggregates of subtropical plantations in China","authors":"Yunxing Bai ,&nbsp;Yunchao Zhou ,&nbsp;Jiaojiao Du ,&nbsp;Xunyuan Zhang ,&nbsp;Jian Feng ,&nbsp;Jirong Feng","doi":"10.1016/j.apsoil.2025.106034","DOIUrl":"10.1016/j.apsoil.2025.106034","url":null,"abstract":"<div><div>The mixed planting of tree species regulates nutrient and carbon cycling in forest ecosystems by shaping soil microbial communities. However, the mechanisms by which tree species identity regulates microorganism-driven nutrient cycling within soil aggregates remain elusive. This study investigated how tree species identity shapes soil aggregate microorganisms and functions related to nutrient cycling in five mixed plantations, established by introducing broadleaved trees (<em>Camellia oleifera</em> Abel, <em>Manglietia chingii</em> Dandy, <em>Cercidiphyllum japonicum</em> Sieb. et Zucc., <em>Michelia maudiae</em> Dunn, and <em>Bretschneidera sinensis</em> Hemsl.) into subtropical coniferous monocultures (<em>Pinus massoniana</em> Lamb.) after thinning. We found that mixing tree species induced shifts in microbial communities, particularly within &lt;2 mm aggregates, where diversity increased compared to monocultures. This was primarily driven by the heterogeneous nutritional resources and microenvironments created by mixed plantations. Notably, the abundance of Actinobacteria and Basidiomycota increased, indicating a transition towards nutrient-rich microenvironments and enhanced organic matter degradation. While mixed plantations fortified fungal network stability, the impact on bacterial networks varied with tree species characteristics, suggesting fungi are more responsive to nutrient differences caused by tree diversity. Furthermore, litter quality (carbon and nitrogen concentration), enzyme activities [(l-leucine aminopeptidase + β-1,4-<em>N</em>-acetylglucoaminosidase)/acid phosphatase], and bacterial Shannon index emerged as key drivers of carbon, nitrogen, and phosphorus accumulation in aggregates. Therefore, our findings underscore that tree species identities influence the interactions between microorganisms and nutrients within aggregates, enhancing nutrient retention and contributing to soil ecosystem multifunctionality and stability. Thus, optimizing tree species composition in plantations can enhance soil fertility and support adaptive forest management.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106034"},"PeriodicalIF":4.8,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628477","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":"No short-term response of microbial or isopod-driven litter decomposition to microplastics","authors":"Maria-Viktoria Kyoseva ,&nbsp;François-Xavier Joly","doi":"10.1016/j.apsoil.2025.106035","DOIUrl":"10.1016/j.apsoil.2025.106035","url":null,"abstract":"<div><div>Microplastic pollution is a growing threat to soils, but its effects on plant litter decomposition remains poorly understood. Particularly, it is unclear how the contribution of soil microorganisms and detritivores to litter decomposition is affected by microplastic pollution. To address this knowledge gap, we evaluated the effect of increasing microplastic concentrations on microbial and isopod-driven litter decomposition, separately, in a one-month full-factorial microcosm experiment under controlled conditions. Contrary to expectations, neither decomposition by microorganisms nor isopods were affected significantly by increased microplastic concentrations. Furthermore, isopod body weight remained unaffected by increased microplastic concentrations. This suggests that microplastics pollution has no observable short-term impact on the contribution of neither microbial nor faunal decomposers to plant litter decomposition. This contrasts with few recent studies that reported positive effects on microbial activity, negative effects on detritivore activity, and an overall positive effect of microplastics on litter decomposition. Microplastic type, concentration, exposure time and application mode likely influence microplastic effects on soil processes, and future research should thus focus on longer-term experiments with environmentally relevant microplastic composition and concentrations.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106035"},"PeriodicalIF":4.8,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mixing of Pinus massoniana and broadleaved tree species alters stoichiometric imbalances between plants and soil microbes and their resources in subtropical plantations","authors":"Piaoyun Deng ,&nbsp;Yunchao Zhou ,&nbsp;Wensha Chen ,&nbsp;Yongyong Wang ,&nbsp;Jirong Feng","doi":"10.1016/j.apsoil.2025.106028","DOIUrl":"10.1016/j.apsoil.2025.106028","url":null,"abstract":"<div><div>Substituting broadleaved trees for some existing coniferous industrial timber trees is an increasingly common cultivation practice to increase productivity, and non-isometric variations in soil carbon (C), nitrogen (N), and phosphorus (P) availability may make it challenging for plants and soil microbes to meet their elemental requirements. However, how plants and soil microbes cope with imbalanced stoichiometry induced by changes in the dominant species to maintain homeostasis remains unclear. We investigated the C:N:P stoichiometry in <em>Pinus massoniana</em> monocultures and in mixed plantations of <em>Pinus massoniana</em> and five individual broadleaved trees (<em>Bretschneidera sinensis</em>, <em>Manglietia conifera</em>, <em>Cercidiphyllum japonicum</em>, <em>Michelia maudiae</em>, and <em>Camellia oleifera</em>). We found that species substitution alleviated soil N-P imbalances for plants; it also alleviated the imbalances in soil accessible resources and litter C:P &amp; N:P for microbes, thus reducing plant and microbial P limitations but aggravated potential microbial C limitations. Lowering the annual N and P uptake ratio and reabsorbing more P relative to N were two important ways that plants decreased the soil N-P imbalance. Increasing microbial biomass, enzymatic activities, and the microbial element utilization ratios C:P and N:P were important mechanisms by which microbes decreased C:P and N:P imbalances with substrates. The synergistic response of plant P uptake vs. microbial P assimilation and plant nutrient resorption efficiency (N:P) vs. microbial element utilization ratio (N:P) implied a mutually reinforcing relationship between plants and microbes in response to stoichiometric imbalances. Overall, these results advance the understanding of the plant- and microbe-driven alleviation of P limitation synergistically in P-scarce fragile ecosystems.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106028"},"PeriodicalIF":4.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619762","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":"The effect of soil microbial traits on soil organic carbon in alpine grassland was limited by depth","authors":"Jia Li ,&nbsp;Xia Wang ,&nbsp;Menghan Yuan ,&nbsp;Yazhen Li ,&nbsp;Wenhui Duan ,&nbsp;Jieyi Xia ,&nbsp;Xusheng Zhang ,&nbsp;Yunfei Zhao ,&nbsp;Huawei Zhu","doi":"10.1016/j.apsoil.2025.106026","DOIUrl":"10.1016/j.apsoil.2025.106026","url":null,"abstract":"<div><div>Microorganisms play an important role in regulating the formation and accumulation of soil organic carbon (SOC). However, it has not yet been determined which microbial factors (community, biomass, and necromass) play a role in SOC pool at different depths in alpine grassland ecosystems and how this is achieved. We conducted a large-scale survey and sampling in two alpine grassland habitats on the Qinghai-Tibetan Plateau at two soil layers (topsoil: 0–10 cm and subsoil: 20–30 cm) over an area spanning 1500 km. The distribution patterns of SOC pools and microbial communities in alpine grasslands were analyzed. We found that microbial biomass carbon decreased significantly with depth, and alpine meadow MBC was significantly larger than alpine steppe. Fungal nercomass carbon was the main contributor to SOC in alpine grasslands. Compared to microbial communities, microbial carbon pools had a greater influence on SOC pools, and they were mainly accumulated through microbial nercomass carbon. Soil moisture affects microbial composition, so microbial diversity and associated network complexity were affected by a wide range of moisture factors (including mean annual precipitation and soil moisture). In deeper soils within alpine grasslands, microbial network complexity reduces the SOC pool by influencing microbial community diversity. This study revealed the controls on microbial communities and SOC at different soil depths within different grassland types on the Qinghai-Tibetan Plateau, and the results emphasize the importance of microbial necromass in SOC pool within alpine ecosystems.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106026"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610699","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":"N cycling increase after savanna afforestation with Eucalyptus or Acacia is reflected in the growth of soil ammonia-oxidizing archaea and nematode bacterial-feeders","authors":"M. Sauvadet ,&nbsp;J.M. Harmand ,&nbsp;P. Deleporte ,&nbsp;A. Martin ,&nbsp;F. Zarah-Shailia ,&nbsp;C. Villenave ,&nbsp;A. Jimenez ,&nbsp;L. Mareschal ,&nbsp;J.P. Bouillet ,&nbsp;J.P. Laclau ,&nbsp;C. Plassard ,&nbsp;J. Trap ,&nbsp;A. Robin","doi":"10.1016/j.apsoil.2025.106027","DOIUrl":"10.1016/j.apsoil.2025.106027","url":null,"abstract":"<div><div>In tropical humid Africa, sandy soils under periodically burnt herbaceous savannas exhibit generally low carbon (C) content and nitrogen (N) availability. Savanna afforestation may overcome these limitations through changes in soil functioning, yet these processes still need to be explored. In this study, we investigated whether changes in the composition of soil micro-food web may explain soil C and N cycling increases following savanna afforestation. We conducted a 7-year experiment in Congo including <em>Eucalyptus</em> and N₂-fixing <em>Acacia</em> monocultures and <em>Eucalyptus-Acacia</em> mixtures established on former herbaceous savannas. We assessed in each of these modalities the soil attributes: organic C and N, pH_H2O, nitrate, ammonium, net C and N mineralization and nitrification rates, along with the abundances of bacteria, fungi, nematodes, ammonia-oxidizing archaea (AOA) and bacteria (AOB) in the top 10 cm layer. Afforestation of savannas with <em>Eucalyptus</em> for timber production increased soil C by 1.7 times, soil net N mineralization rates by 1.9 times and soil inorganic nitrogen by 2.5 times. Mixed <em>Acacia-Eucalyptus</em> and <em>Acacia</em> monoculture plantations further improved the rate of net nitrogen mineralization by a factor of 1.4 and soil inorganic N by a factor of 2.3 compared with <em>Eucalyptus</em> monocultures. These changes were associated with a gradual increase in AOA abundance from savanna to <em>Eucalyptus</em> monoculture, <em>Eucalyptus-Acacia</em> mixtures and finally <em>Acacia</em> monoculture. Savanna afforestation resulted in a significant increase in the absolute abundance of bacterial-feeding nematodes by 678 %, but to a decrease in the abundance of both fungal-feeders, and omnivores and predators. Increase in N cycling was positively associated with both AOA and nematode bacterial-feeder abundances, underlining the importance of monitoring micro-food web structure to understand better how land use changes affect soil biogeochemical cycling in the context of tropical afforestation.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106027"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potentially toxic elements in different inorganic and organic fertilizers: A comprehensive review on global perspective and fertilizer-wise differences","authors":"Saloni Sachdeva ,&nbsp;Abhiruchi Varshney ,&nbsp;Harish Chandra Barman ,&nbsp;Mike A. Powell ,&nbsp;Prafulla Kumar Sahoo","doi":"10.1016/j.apsoil.2025.105996","DOIUrl":"10.1016/j.apsoil.2025.105996","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Although fertilizer use greatly enhances the crop productivity, applying it excessively can lead to serious concern of agricultural soil contamination and global food safety. Despite this widespread concern, there is a lack of comprehensive studies evaluating fertilizer-wise differences in accumulating potentially toxic elements (PTEs) on a global perspective. This study addresses this gap by compiling 74 research articles from different countries that were retrieved from the &lt;em&gt;Scopus&lt;/em&gt;, &lt;em&gt;ScienceDirect&lt;/em&gt;, &lt;em&gt;PubMed and Google Scholar database&lt;/em&gt;. The compiled data was first divided into inorganic and organic origins and then into the 14 fertilizer types; 6 inorganic and 8 organic group of fertilizers. The result showed that the average PTEs concentration is widely varied between and within the group of fertilizers. Among the major inorganic fertilizers, \"P\" (phosphorus) group- exhibited the highest and 2nd highest median concentrations (mg kg&lt;sup&gt;-1&lt;/sup&gt;) of most of the PTEs (in decreasing order of Al (7906) &gt; Fe (2644) &gt; Cr (127) &gt; U (111) &gt; V (103) &gt; Zn (94) &gt; Mn (68) &gt; Ni (23) &gt; Cu (15) &gt; As (10) &gt; Cd (7) &gt; Co (6.6) &gt; Mo (6.2) &gt; Se (3), followed by \"M\" (mixed), \"K\" (potassium) and \"N\" (nitrogen) groups . Phosphate rocks (\"PR\"), which used as a raw material in making P-based fertilizers, also contain higher levels of most of the PTEs, similar with \"P\". Comparing to the European Union (EU) Regulation 2019/1009 related to inorganic fertilizers, higher % of data points of \"P\" (up to 25 %), \"M\" (up to 13 %) and \"PR\" (up to 22 %) groups exceeded the legal limits of As (40 mg kg&lt;sup&gt;−1&lt;/sup&gt;), Pb (120 mg kg&lt;sup&gt;−1&lt;/sup&gt;), and Ni (50 mg kg&lt;sup&gt;−1&lt;/sup&gt;), while \"N\" and \"K\" groups were mostly remained below the legal limits. Among the organic categories, CSS (i.e., compost includes municipal solid waste and sewage sludge as raw materials) displayed significantly higher median values (mg kg&lt;sup&gt;-1&lt;/sup&gt;) of the PTEs, including Zn (514), Cu (181), Pb (127), Cr (93), Ni (56), As (11) and Cd (3) than others. When compared to the EU Regulation 2019/1009 for organic fertilizers, CSS showed a significantly higher % of data points (up to 61%) that surpassed the limits of As, Pb, Hg, Ni and Cd; MPG (pig manure) and MCH (chicken/poultry manure) were next (up to 28.5% and 21.8%, respectively), while others mostly remained within the limits. This reflects a drastic difference of PTEs accumulation between the type of fertilizers, emphasizing the necessity to continue research on toxic elements quantification in fertilizers and the raw materials used in them. The results of this study can be served as a baseline level of PTE levels in different fertilizer types for developing more sustainable fertilization practices to safeguard agricultural soils and human health. However, this data should be used with cautions due to certain limitations, especially variability in sample sizes and number of elements acr","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 105996"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611315","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":"Successional transition from broadleaf to bamboo forests promotes fungal communities and soil carbon mineralization following the altered litterfall quality","authors":"Qiumei Teng ,&nbsp;Tao Fang ,&nbsp;Qianqian Zhang ,&nbsp;Anna Gunina ,&nbsp;Aiyu Zheng ,&nbsp;Zhaoliang Song ,&nbsp;Jingyun Zhou ,&nbsp;Scott X. Chang ,&nbsp;Yongchun Li","doi":"10.1016/j.apsoil.2025.106006","DOIUrl":"10.1016/j.apsoil.2025.106006","url":null,"abstract":"<div><div>Forest succession alters soil organic carbon (SOC) dynamics by changing litter quality of litter entering the soil and affecting microbial communities. However, few studies have explored how litter quality interacts with soil fungal communities to regulate SOC mineralization during successional changes in forest succession. We studied the relationship between litter quality, SOC mineralization, and associated fungal composition by conducting an in-situ decomposition experiment in a natural broadleaf forest and a pure Moso bamboo (<em>Phyllostachys edulis</em>) forest, where the succession in former forest arrested by structurally inferior bamboo grasses. On average, topsoil organic carbon mineralization increased by 73 % and subsoil by 233 % (only during autumn) following the broadleaf forest transitions to bamboo dominance. More decomposable litterfall in the bamboo forests increased the abundance of saprophytic fungi (e.g., Mortierellales and Chaetothyriales orders) and enhanced topsoil degradation functions, promoting SOC mineralization compared to the broadleaf forest. Higher water-soluble organic carbon content increased subsoil organic carbon mineralization by increasing the abundance of Mortierellales order. Our results emphasized the importance of interaction between litter quality and fungal composition (especially saprophytic fungi) regulated SOC mineralization in arrested succession. The enhanced SOC mineralization after the broadleaf forest transition to bamboo forest suggested that the traits of Moso bamboo, such as fast litterfall decomposition, can accelerate SOC mineralization to reinforce its dominance. By examining the role of microbial decomposition in regulating soil nutrient dynamics in the context of arrested succession, our study offered a unique mechanistic perspective on the belowground drivers of bamboo dominance, with important implications for forest structure and function.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106006"},"PeriodicalIF":4.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601248","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":"Soil depth shapes the microbial response to land use and climate change in agroecosystems","authors":"Lena Philipp ,&nbsp;Marie Sünnemann ,&nbsp;Martin Schädler ,&nbsp;Evgenia Blagodatskaya ,&nbsp;Mika Tarkka ,&nbsp;Nico Eisenhauer ,&nbsp;Thomas Reitz","doi":"10.1016/j.apsoil.2025.106025","DOIUrl":"10.1016/j.apsoil.2025.106025","url":null,"abstract":"<div><div>Soil microbial communities are vital for ecosystem functions and are strongly affected by land use and climate change, yet the specific impacts in deeper topsoil layers remain unclear. This study investigates these effects across three topsoil layers after eight years of experimental treatments at the Global Change Experimental Facility (GCEF) in order to unravel the role of different topsoil layers in the response of microbial communities to land use and climate change. Distinct effects of land use and climate change on microbial biomass, community structure, and functions in agroecosystems were observed, with the upper 15 cm of soil exhibiting the strongest responses, and more pronounced land use impacts than those of climate change. Although spring climate treatment including higher precipitation and higher temperature provided favorable conditions for microbes, negative effects, possibly a legacy from previous summer droughts, persisted. Despite a decrease in microbial abundance and activity with depth, a diverse microbial community persisted throughout the topsoil due to organic material input. Grasslands exhibited greater changes in microbial community structure and reduced biomass and functionality with depth, whereas tilled croplands showed less pronounced depth effects. Thus, deeper topsoil layers were more critical for soil functionality in croplands. Surprisingly, responses to experimental treatments were partly reversed in deeper soil layers compared to the uppermost layer, suggesting a buffering role of deeper layers against disturbances. These findings emphasize the importance of considering soil depth and land management practices in global change studies to fully understand impacts on soil health and ecosystem functioning. However, croplands' reliance on deeper soil layers suggests vulnerability to additional stressors, underscoring the need of balanced land management practices to ensure long-term ecosystem resilience.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106025"},"PeriodicalIF":4.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short term effects of fire on assembly rules and β-diversity of soil bacteria in Mediterranean soils","authors":"George P. Stamou ,&nbsp;Spiros Papakostas ,&nbsp;Claudia Rojas ,&nbsp;Effimia M. Papatheodorou","doi":"10.1016/j.apsoil.2025.105994","DOIUrl":"10.1016/j.apsoil.2025.105994","url":null,"abstract":"<div><div>Fires are common in Mediterranean soils and constitute an important driver of their evolution; however, their effects on the assembly rules of soil bacteria received limited attention. We reanalyzed the data from Aponte et al. (2022), retrieved from the NCBI database, to investigate fire-induced short term effects on β-diversity, abundance ranking, and the co-occurrence patterns among bacterial OTUs under the pyrodiversity-biodiversity hypothesis. Higher richness and abundance of bacterial OTUs were recorded in the burnt compared to the unburnt areas. Although a-diversity was unaffected, β-diversity based on Bray Curtis similarity index decreased by fire. The β-ratio analyzing the two components of β-diversity (nestedness and turnover) was &gt;0.5 in unburnt and &lt;0.5 in burnt area, denoting the predominance of stochastic and deterministic regulation, respectively. The Zero-Sum Model showed the best fit to the abundance data of the local communities followed by the deterministic Zipf-Mandelbrot model. Fire increased the dispersion between the local communities, while taxa niche diversification was less strict compared to the unburnt soils. Fire disconnected the co-occurrence bacterial network, but networks in both burnt and unburnt areas exhibited modular architecture with Small-World properties and increased robustness to broadly distributed disturbances. However, fire increased the vulnerability of bacterial network to targeted disturbances. The robustness to widespread disturbances such as fire was likely related to the long evolutionary history of organisms inhabiting the Mediterranean soils.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 105994"},"PeriodicalIF":4.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}