CatenaPub Date : 2026-03-01Epub Date: 2026-01-18DOI: 10.1016/j.catena.2026.109832
Teodoro Carlón-Allende , José Luis Macías , Guillermo Cisneros-Máximo , Jesús Alcalá-Reygosa , Juan Manuel Sánchez-Núñez , Ricardo Saucedo , José Luis Arce , Jorge Iván Lara , Julio César Pineda Serrano , Juan Salvador Fernández-Peña
{"title":"Recurrent historical lahars in Jamapa Gorge, Pico de Orizaba volcano, Mexico: Geological and dendrochronological evidence","authors":"Teodoro Carlón-Allende , José Luis Macías , Guillermo Cisneros-Máximo , Jesús Alcalá-Reygosa , Juan Manuel Sánchez-Núñez , Ricardo Saucedo , José Luis Arce , Jorge Iván Lara , Julio César Pineda Serrano , Juan Salvador Fernández-Peña","doi":"10.1016/j.catena.2026.109832","DOIUrl":"10.1016/j.catena.2026.109832","url":null,"abstract":"<div><div>Lahars are a recurring phenomenon in volcanic areas and have a high potential to cause economic losses and fatalities. In recent decades, tree-ring records combined with stratigraphic correlations have proven valuable for reconstructing the spatiotemporal occurrence of these events. This study analyzes lahars exposed in the upper Jamapa Gorge, located on the northern flank of Pico de Orizaba volcano, at elevations between 3760 and 4000 m above sea level. We employed an unmanned aerial vehicle (UAV) to generate an orthomosaic and a digital elevation model (DEM), enabling the production of a detailed geological map of the study area. Fieldwork included the construction of stratigraphic columns, the collection of volcaniclastic samples, and dendrochronological sampling of 163 <em>Pinus hartwegii</em> tree cores. Stratigraphic analysis identified three distinct ancient terraces formed by lahar activity, composed of heterolithological massive deposits made of boulder-gravel fragments supported by a coarse sandy matrix. The terrace tops are semi-flat and currently colonized by <em>Pinus hartwegii</em>. We generated three tree-ring chronologies providing minimum ages for terrace formation of ≤292, ≤96, and ≤79 years. The lahar deposit dated at ≤96 years correlates with the Mw 6.4 Jalapa earthquake of January 3rd, 1920, whereas the ≤79 years deposit may be associated with extreme rainfall produced by a category 3 hurricane in September 1931. The oldest deposit (≤292) may be related to snowmelt processes or extreme rainfall events. These results provide new insights into the historical occurrence of lahars in Mexican volcanoes, which have been comparatively understudied. Establishing more accurate lahar chronologies is essential for improving hazard assessments, as these events pose significant risks of damage to infrastructure and populations located at the base of active volcanoes.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109832"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-06DOI: 10.1016/j.catena.2025.109733
Chaohui Ma , Xiaoxue Guo , Ruirui Xu , Peng Gao , Jiahui Zhou , Yuxuan Zhang , Xingmin Mu
{"title":"Decoupling effects of driving factors on sediment load in the middle reaches of the Yellow River","authors":"Chaohui Ma , Xiaoxue Guo , Ruirui Xu , Peng Gao , Jiahui Zhou , Yuxuan Zhang , Xingmin Mu","doi":"10.1016/j.catena.2025.109733","DOIUrl":"10.1016/j.catena.2025.109733","url":null,"abstract":"<div><div>Extensive soil and water conservation practices have profoundly reshaped sediment transport in the middle reaches of the Yellow River. Scientifically quantifying the driving factors behind these changes is essential for effective watershed management. Previous studies have primarily focused on the direct contributions of climate and human activities to sediment load across the entire watershed, often neglecting runoff-mediated pathways and spatial heterogeneity. This study analyzed the spatiotemporal variation in sediment load across the middle Yellow River and its sub-regions using continuous hydrological records from 1960 to 2020. Partial Least Squares Structural Equation Modeling was applied to elucidate the direct effects of vegetation and climate on sediment load from runoff-mediated indirect effects and to reveal the spatial heterogeneity of driving factors. Results showed a highly significant decline in sediment load (P < 0.01) from 1960 to 2020. Since 2000, Wu–Long region has become the main sediment source. The driving factors of sediment load in the study area exhibited both temporal and spatial variability. Temporally, climate prevailed from 1980 to 1999 (total effect = 0.37), whereas vegetation became dominant from 2000 to 2020 (total effect = −0.33). Spatially, Tou–Wu region was primarily influenced by climate (−0.85 ≤ total effect ≤ −0.52), while vegetation dominated the Wu–Long region (−0.41 ≤ total effect ≤ 0.57). Runoff had a highly significant effect on sediment load variations (P < 0.01). The indirect effects of vegetation through runoff in the Tou–Long and Wu–Long regions (−0.55 to 0.36 and −0.59 to 0.32, respectively) exceeded the direct effects (−0.10 to 0.10 and 0.18 to 0.25), confirming runoff as a key mediating factor. This study reveals spatial heterogeneity of sediment load drivers in the Hekou–Longmen region, providing a scientific basis for precision management and sustainable ecology in the middle Yellow River.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109733"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-03DOI: 10.1016/j.catena.2025.109789
Yunhao Li , Mingjie Shi , Ping'an Jiang , Jinzhi Gu , Jia Guo , Jiahao Zhao , Gongxin Wang , Yanmin Fan , Hongqi Wu
{"title":"Hydrothermal stress influences the spatial distribution pattern of soil organic carbon and its stock in Xinjiang","authors":"Yunhao Li , Mingjie Shi , Ping'an Jiang , Jinzhi Gu , Jia Guo , Jiahao Zhao , Gongxin Wang , Yanmin Fan , Hongqi Wu","doi":"10.1016/j.catena.2025.109789","DOIUrl":"10.1016/j.catena.2025.109789","url":null,"abstract":"<div><div>Soil organic carbon (SOC) is a critical component of the terrestrial ecosystem carbon cycle. Its spatial distribution and formation mechanisms are essential for understanding carbon sink functions and informing management strategies in arid regions. However, current research has mainly focused on local areas, lacking systematic analyses of large-scale SOC spatial distribution and its driving mechanisms in arid zones-particularly the interactions between hydrothermal stress and other environmental factors. To address this gap, this study focuses on Xinjiang, a typical arid region in China. Based on 2757 measured soil samples, we integrated remote sensing imagery and multi-source environmental covariates to construct a Random Forest (RF) model for spatial prediction of SOC content. We further innovatively combined SHapley Additive exPlanations (SHAP analysis) and piecewise Structural Equation Modeling (pSEM) to analyze the dominant factors and response mechanisms controlling SOC in arid regions. The results of this innovative study are: (1) the Random Forest model achieved reliable prediction with an R<sup>2</sup> of 0.67, revealing that SOC spatial distribution exhibits a geomorphic gradient pattern of high levels in mountains (over 15 g kg<sup>−1</sup>), moderate levels in oases, and low levels in deserts (below 5 g kg<sup>−1</sup>), primarily controlled by hydrothermal conditions, with a total estimated stock of 3.19 Pg C for the top 30 cm; (2) evapotranspiration (ET) and soil moisture (SM) are the most important positive drivers of SOC, while soil temperature (ST) and vapor pressure deficit (VPD) exert significant negative effects; and (3) human activities regulate local hydrothermal stress through irrigation, but SOC stability is highly dependent on management practices. This study reveals the coupled pathways of hydrothermal stress mechanisms and human regulation in SOC formation, providing a theoretical basis and methodological support for carbon stock assessment and precision management in arid regions.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109789"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145882974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-10DOI: 10.1016/j.catena.2025.109787
Alexandre Nicolae Lerma , Olivier Burvingt , Bruno Castelle , Bruce Ayache , Nicolas Robin , David Rosebery , Julie Billy
{"title":"Multi-annual evolution of coastal dunes: Transition from fixed to transgressive dunes state","authors":"Alexandre Nicolae Lerma , Olivier Burvingt , Bruno Castelle , Bruce Ayache , Nicolas Robin , David Rosebery , Julie Billy","doi":"10.1016/j.catena.2025.109787","DOIUrl":"10.1016/j.catena.2025.109787","url":null,"abstract":"<div><div>Most of coastal dunes located in temperate latitudes, especially in the Northern Hemisphere, are relatively stable. However, along the Gironde coast (SW France) substantial dune remobilization has been observed over the last decade following major marine erosion events during the 2013–2014 winter. This study is based on the analysis of a robust dataset including (i) 10 high-resolution Digital Terrain Models (DTMs) derived from airborne LiDAR surveys conducted over a 12-year period (2011−2023) and (ii) 7 Satellite-derived Digital maps of dune vegetation cover derived from Sentinel-2 satellite images acquired between 2017 and 2023. These morphological and biological parameters are linked to forcing parameters derived from observed wind data, to provide a comprehensive analysis of coastal dune changes related to the transition from vegetation-fixed dunes to the development of transgressive dunes. For the first time, morphological and vegetation dynamics are explored over a large spatial scale (tens of km), covering a range of initial dune morphology and sediment supply.</div><div>Dunes have transitioned from stable to transgressive states primarily driven by sediment stoss slope recycling process (cannibalism) across a gradient of alongshore variable dune sediment budget, ranging from slightly negative to notably positive (+10 to 15 m<sup>3</sup>/m/yr), Along this coast, transgressive dunes defined as dune migrating via similar stoss and lee slope migration rates, have tripled in number over the last 10 years (reaching ≈ 15 km or 17.3 % of the studied coast). At the center of the Gironde coast where dunes are heavily remobilised, the lee slope of the dune translates landward at a rate of several meters to more than 10 m/year. In the following years, dunes will probably continue to migrate and remobilise across a broader scale if no re-stabilization management plan is implemented.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109787"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-20DOI: 10.1016/j.catena.2026.109804
Yasutaka Tanaka , Taro Uchida
{"title":"Comparative studies of bench-scale experiments examining the effect of pipe flows on landslide initiation","authors":"Yasutaka Tanaka , Taro Uchida","doi":"10.1016/j.catena.2026.109804","DOIUrl":"10.1016/j.catena.2026.109804","url":null,"abstract":"<div><div>Several bench-scale studies have been conducted to investigate the effect of pipe flows on landslide initiation. However, these studies focused solely on a single factor, overlooking the combined influence of multiple factors on slope instability and landslide occurrence. Thus, the intercomparison of these experimental results may provide a comprehensive understanding of pipe-flow effects on landslide initiation. Therefore, the objective of this review is to examine the effects of pipe flows on slope stability through an intercomparison of bench-scale experiments. We consider that pipe flows induce landslides when the water flow rate exceeds the maximum admissible flow rate of the soil pipes, referred to as the critical flow rate. At this critical point, the water flow cannot be confined to the soil pipes. Multiple studies have demonstrated that clogging, joints, gradient change, and air entrapment are factors influencing the critical flow rate of soil pipes. Additionally, the pore water pressure has been shown to increase at the area where the critical flow rate of the soil pipe decreases in the longitudinal direction, causing slope instability. Thus, we propose that the decrease in the critical flow rate of the soil pipe in the longitudinal direction induces slope instability and an increase in the pore water pressure.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109804"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-20DOI: 10.1016/j.catena.2026.109820
Min Li , Jipeng Wang , Yongping Kou , Dungang Wang , Huangxin Zhang , Qiuhong Feng , Na Li , Huajun Yin
{"title":"Elevational shifts in diazotrophic communities in subalpine forests: joint effects of temperature and soil properties","authors":"Min Li , Jipeng Wang , Yongping Kou , Dungang Wang , Huangxin Zhang , Qiuhong Feng , Na Li , Huajun Yin","doi":"10.1016/j.catena.2026.109820","DOIUrl":"10.1016/j.catena.2026.109820","url":null,"abstract":"<div><div>Soil diazotrophs introduce significant amounts of new nitrogen (N) into forest ecosystems through the process of free-living N fixation. However, the factors influencing their community structure and function remain elusive, particularly in subalpine forests that are often characterized by N limitation. Here, we explored the patterns and drivers of the diazotrophic community structure (abundance, diversity, composition, and inter-specific interactions) and N fixation potential (<em>nifH</em> mRNA copy number) along a 400-m elevational gradient in subalpine forests on the eastern edge of Tibetan Plateau, using droplet digital PCR, <em>nifH</em> gene sequencing, and metagenomic sequencing. The results showed that the diazotrophic community varied significantly across different elevations, with <em>Bradyrhizobium</em> consistently identified as the key taxa. Our findings also demonstrated the predominant role of environmental filtering in shaping the diazotrophic community. Specifically, the elevational pattern of diazotrophic abundance was primarily driven by soil resource availability, while those of α-diversity, community composition, and co-occurrence network were jointly modulated by temperature and soil properties. In comparison to total bacteria, the α-diversity of diazotrophs was more sensitive to changes in temperature. The positive relationship between temperature and diazotrophic diversity indicates that future subalpine forests may support more diverse soil diazotrophic communities due to projected increases in temperature. Moreover, we found a weak linkage between diazotrophic community structure and N fixation potential, indicating the complexity of the diazotrophic structure-function relationship in subalpine forests. Overall, our work highlights the sensitivity of diazotrophic community structure to future environmental changes in subalpine forests. Further studies are needed to simultaneously monitor the diazotrophic community structure and N fixation rates across a broader range of sites.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109820"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-22DOI: 10.1016/j.catena.2026.109848
Run Liu , Chengyi Li , Qimei Wu , Dengfu Wang , Zhaohui Zhang , Jiachen Shen
{"title":"The role of moss crusts in soil organic carbon accumulation and microbial ecological regulation in post-fire karst areas of Guizhou, China","authors":"Run Liu , Chengyi Li , Qimei Wu , Dengfu Wang , Zhaohui Zhang , Jiachen Shen","doi":"10.1016/j.catena.2026.109848","DOIUrl":"10.1016/j.catena.2026.109848","url":null,"abstract":"<div><div>Wildfires frequently occur in karst areas, posing a severe threat to soil organic carbon (SOC) stability and microbial ecological functions. However, it remains unclear how different vegetation types regulate this recovery process following fire events. This study assessed the effects of moss crusts and vascular plants on different components of SOC, functional genes of the carbon cycle, and microbial communities in recently burned karst areas of Guizhou Province, China. The results indicate that moss crusts significantly enhance total organic carbon (TOC) content and organic carbon fractions, with particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) proportions elevated relative to vascular plants and bare soil. Additionally, moss crusts upregulated the expression of key C-fixing genes (e.g., <em>rbcL</em>, <em>aclB</em>, <em>acsB</em>) and significantly suppressed C-degradation genes, with the abundance of the <em>rbcL</em> gene being approximately three times higher than that vascular plants. Furthermore, moss crusts promoted the formation of distinct microbial communities, enriching copiotrophic bacteria (e.g., Actinobacteriota and Proteobacteria) and ascomycete fungi, while reducing the abundance of oligotrophic and lignin-degrading taxa. In summary, through the dual mechanisms of promoting carbon input and inhibiting decomposition, moss crusts have emerged as an effective approach to enhance soil carbon sequestration capacity and stability in post-fire karst areas, and can serve as a valuable nature-based solution for ecological restoration following fires in karst region.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109848"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146035032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-10DOI: 10.1016/j.catena.2026.109818
Xinmeng You , Xiaodong Yang , Lu Gong , Yihu Niu , Xue Wu , Xiaochen Li , Qian Guo
{"title":"Slope orientation regulates the joint influence of ephemeral plants and microorganisms on the soil multifunctionality of the mobile sand dunes","authors":"Xinmeng You , Xiaodong Yang , Lu Gong , Yihu Niu , Xue Wu , Xiaochen Li , Qian Guo","doi":"10.1016/j.catena.2026.109818","DOIUrl":"10.1016/j.catena.2026.109818","url":null,"abstract":"<div><div>In desert dune ecosystems, climate change-and human disturbance-induced ecological processes have exacerbated the expansion risk of mobile dunes, substantially impairing soil functions maintenance and performance. As key biological functional groups in the dune ecosystem, ephemeral plants and soil microorganisms play crucial roles in regulating soil multifunctionality (SMF). However, the ecological mechanisms underlying this regulation remain unclear. To address this gap, we conducted a study on typical mobile dunes at the southern margin of the Gurbantunggut Desert. We established plots across four dune slope orientations to investigate the structure and diversity of ephemeral plant communities, employed high-throughput sequencing to analyze soil microbial community composition, and comprehensively evaluated SMF and its driving mechanisms. Results showed that SMF was significantly higher at the dune bottom than on the middle positions. Biodiversity and single functional indicators varied among different slope orientations. Piecewise structural equation modeling (SEM) analysis revealed that microbial diversity (bacterial ACE and fungal ACE) exerted a direct and significant positive effect on SMF. In contrast, plant diversity (Shannon and MNTD) imposed significant negative impacts through the dominant-species effect and their interactions with microorganisms. Our findings indicated that slope orientation, as a key environmental filtering factor, regulated soil physicochemical factors such as soil moisture, electrical conductivity, and pH. This regulation indirectly affected the structure and interaction of plant and microbial communities, which in turn modulated SMF. Collectively, slope orientation-driven environmental heterogeneity, microbial functional complementarity, and the dominant-species effect govern the spatial differentiation of SMF in arid desert dune ecosystems.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109818"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-15DOI: 10.1016/j.catena.2026.109817
Layla M. San-Emeterio , Nicasio T. Jiménez-Morillo , José A. Vega , Cristina Fernández , Teresa Fontúrbel , Gonzalo Almendros , José.A. González-Pérez
{"title":"Effects of fire severity on soil organic matter: a multi-isotope (C, N, H, O) comparison of wildfires and experimental burns","authors":"Layla M. San-Emeterio , Nicasio T. Jiménez-Morillo , José A. Vega , Cristina Fernández , Teresa Fontúrbel , Gonzalo Almendros , José.A. González-Pérez","doi":"10.1016/j.catena.2026.109817","DOIUrl":"10.1016/j.catena.2026.109817","url":null,"abstract":"<div><div>Fire severity is key in shaping soil organic matter (SOM) composition, affecting biogeochemical cycles and post-fire recovery. However, accurately assessing fire severity is highly challenging, requiring the implementation of soil burn severity (SBS) indexes. This study employs a multi-isotope and elemental approach (C, N, H, O) to assess fire-induced changes in SOM quantity and quality across soil burn severity (SBS) levels in 0–2 cm mineral soil samples from wildfires and controlled experimental burns on intact soil monoliths in pine forests of Galicia (NW Spain). Results indicate that total organic carbon (TOC) and nitrogen (TN) decreased with increasing burn severity, with TOC losses reaching up to 90% in the most severe burns. Stable isotope analyses revealed divergent fractionation patterns: carbon isotope (δ<sup>13</sup>C) depletion in wildfire-affected soils suggested preferential combustion of lignin-derived compounds, whereas experimental burns exhibited slight δ<sup>13</sup>C enrichment due to the removal of thermolabile organic fractions. Similarly, nitrogen isotope (δ<sup>15</sup>N) values increased with burn severity, which may be linked to the alteration soil microbial community and selective nitrogen volatilization. Hydrogen (δ<sup>2</sup>H) and oxygen (δ<sup>18</sup>O) isotopes showed distinct evaporative and oxidative fractionation trends, with experimental fires displaying stronger δ<sup>2</sup>H enrichment due to more controlled combustion conditions. These findings highlight the utility of elemental and stable isotope analysis in distinguishing between fire types and assessing fire impacts on SOM. These results confirm the suitability of this system of visual indicators for assessing changes in the quality of organic matter in a simple way after a fire.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109817"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
CatenaPub Date : 2026-03-01Epub Date: 2026-01-27DOI: 10.1016/j.catena.2026.109839
Lilit Pogosyan , Maria Bronnikova , Sergey Goryachkin , Elizabeth Solleiro-Rebolledo , Anna Schneider
{"title":"Soil Memory: from metaphor to a framework for Earth system history and human–environment interactions","authors":"Lilit Pogosyan , Maria Bronnikova , Sergey Goryachkin , Elizabeth Solleiro-Rebolledo , Anna Schneider","doi":"10.1016/j.catena.2026.109839","DOIUrl":"10.1016/j.catena.2026.109839","url":null,"abstract":"","PeriodicalId":9801,"journal":{"name":"Catena","volume":"264 ","pages":"Article 109839"},"PeriodicalIF":5.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}