IF 5.7 1区农林科学

Catena Pub Date : 2025-09-29 DOI: 10.1016/j.catena.2025.109485

Samuel I. Haruna

{"title":"Land management, slope positions, and thermal properties as regulators of microbial biomass and community composition","authors":"Samuel I. Haruna","doi":"10.1016/j.catena.2025.109485","DOIUrl":"10.1016/j.catena.2025.109485","url":null,"abstract":"<div><div>Various land management practices and slope positions can modify the functions and health of soil ecosystems. What is currently unknown is the dependence of microbial biomass and their community composition on in situ measured soil thermal properties. Therefore, this study examined how rotational grazing (Graz), non-grazed forage management (NoGr), and crop rotation (Crop) influences soil thermal properties at 5 different slope positions (summit, shoulderslope, backslope, footslope, and toeslope) and the dependence of total microbial biomass, microbial community composition, and microbial ratios on these variables. It is expected that microbial communities will vary among land management practices and increase downslope, while management practices that increase soil heat capacity will increase microbial biomass. Results showed that total microbial biomass under NoGr management was 22% and 317% greater than Graz and Crop managements, respectively. Similarly, total PLFAs, and the composition and diversity of microbial biomass was greater under NoGr management and at the toeslope position than other management and slope positions, respectively. Additionally, all microbial biomass were negatively related to soil temperature under all management practices. Interestingly, total microbial biomass showed a strong dependence with heat capacity under NoGr management, and a strong dependence with thermal conductivity under Crop management. In general, total microbial biomass and microorganism populations were greater under NoGr management at the toeslope, and this was correlated with greater heat capacity and thermal resistivity.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109485"},"PeriodicalIF":5.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217432","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}

引用次数: 0

Late deglacial and Holocene vegetation and climate change at Lake Mapam Yumco, southwestern Tibetan Plateau

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-29 DOI: 10.1016/j.catena.2025.109484

Sima Humagain , Xinmiao Lü , Liping Zhu , Qingfeng Ma , Junbo Wang , Jianting Ju , Shaohang Zhu , Jiuju Cheng , Binija Kaphle , Khum Narayan Paudayal

{"title":"Late deglacial and Holocene vegetation and climate change at Lake Mapam Yumco, southwestern Tibetan Plateau","authors":"Sima Humagain , Xinmiao Lü , Liping Zhu , Qingfeng Ma , Junbo Wang , Jianting Ju , Shaohang Zhu , Jiuju Cheng , Binija Kaphle , Khum Narayan Paudayal","doi":"10.1016/j.catena.2025.109484","DOIUrl":"10.1016/j.catena.2025.109484","url":null,"abstract":"<div><div>Environmental changes on the Tibetan Plateau (TP) and their responses to the Indian summer monsoon (ISM) and the westerlies have attracted significant attention. However, our understanding of regional vegetation and climate changes influenced by the ISM from the Arabian Sea and the westerlies in the southwestern TP remains limited. Here, we present a pollen record from Lake Mapam Yumco covering the late deglacial to the Holocene. Results show that alpine meadow was sparsely distributed around the lake, with relatively high moisture from 13.5 to 11.7 cal ka BP. The early Holocene (11.7–8.3 cal ka BP) was the most humid period, marked by persistent alpine meadow and expanding steppe. During 8.3–4.2 cal ka BP, the climate became drier, with alpine meadow steppe dominating. After 4.2 cal ka BP, vegetation shifted to sparse dry steppe. Moisture conditions at Lake Mapam Yumco were humid in the late deglacial and early Holocene but drier in the late Holocene compared to the eastern TP, due to the ISM from different pathways and the influence of the southern branch of the westerlies. The stepwise drying trend in the Holocene reflects that the regional climate was mainly controlled by the ISM, which was driven by the summer insolation at 30°N and the position of the Intertropical Convergence Zone. Exotic pollen studies underscore the crucial role of the westerlies and El Niño-Southern Oscillations in atmospheric circulation. Dry events in the Holocene highlight that the North Atlantic region also impacts the climate in the southwestern TP.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109484"},"PeriodicalIF":5.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217391","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}

引用次数: 0

Waterlogging increases microbial necromass carbon and particulate organic carbon in alpine meadow soils 涝渍增加了高寒草甸土壤微生物坏死体碳和颗粒有机碳

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-28 DOI: 10.1016/j.catena.2025.109493

Xiaoming Mou , Yuqiang Li , Xuyang Wang , Han Mao , Bin Jia , Fencan Li , Jie Chen , Yun Chen , Yingwen Yu , Yakov Kuzyakov

{"title":"Waterlogging increases microbial necromass carbon and particulate organic carbon in alpine meadow soils","authors":"Xiaoming Mou , Yuqiang Li , Xuyang Wang , Han Mao , Bin Jia , Fencan Li , Jie Chen , Yun Chen , Yingwen Yu , Yakov Kuzyakov","doi":"10.1016/j.catena.2025.109493","DOIUrl":"10.1016/j.catena.2025.109493","url":null,"abstract":"<div><div>Hydrological changes induced by climate warming and human activities significantly impact soil organic carbon (SOC) accumulation in grasslands. Microbial necromass carbon (MNC) and particulate organic carbon (POC) plays a pivotal role in forming stable and labile SOC reservoirs. However, the accumulation of MNC and POC, their contribution to SOC, and the mechanisms governing these processes along the alpine grassland-wetland continuum remain unclear. We investigated the effects of a hydrological gradient on MNC and POC accumulation and their contributions to SOC, as well as the underlying mechanisms in topsoil and subsoils on the Tibetan Plateau. Fens had 320% and 280% higher SOC sequestration efficiency in the topsoil than mesic and wet meadows, respectively. Waterlogging increased the total MNC, fungal necromass carbon (FNC), and bacterial necromass carbon (BNC) content in both topsoil and subsoil, while the MNC proportion in SOC remained stable at an average of 32% along the alpine grassland-wetland continuum. Additionally, waterlogging also increased POC content, with a higher proportion of POC in SOC observed in anaerobic fens compared to mesic meadows. Lower FNC/BNC ratios and a higher POC proportion in SOC indicate reduced SOC stability in waterlogged fens. Correlation analysis and structural equation modelling showed that microbial biomass and pH were key determinants of MNC in the topsoil, while microbial biomass, iron and aluminum oxides primarily determined MNC in the subsoil. We conclude that waterlogging increases total MNC and POC content in soil. While the MNC contribution to SOC remains stable, the POC contribution to SOC increases significantly. Thus, SOC in fens exhibits reduced stability, forewarning of potential C loss risks associated with the decline of wetland areas in alpine meadows.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109493"},"PeriodicalIF":5.7,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217435","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}

引用次数: 0

Reforestation in northern China during the Ming Dynasty to counteract environmental degradation 明朝期间，中国北方重新造林以对抗环境退化

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-27 DOI: 10.1016/j.catena.2025.109473

Chong Huang , Xiaozhong Huang , Jun Zhang , Yudie Chen , Jiayu Deng , Muhammad Farqan , Xiuxiu Ren , Lixiong Xiang , Tao Wang , Hong Yang

{"title":"Reforestation in northern China during the Ming Dynasty to counteract environmental degradation","authors":"Chong Huang , Xiaozhong Huang , Jun Zhang , Yudie Chen , Jiayu Deng , Muhammad Farqan , Xiuxiu Ren , Lixiong Xiang , Tao Wang , Hong Yang","doi":"10.1016/j.catena.2025.109473","DOIUrl":"10.1016/j.catena.2025.109473","url":null,"abstract":"<div><div>While human activities have historically caused serious damage to vegetation and soils, human behavior and strategies that have contributed to early environmental protection and provided ecological benefits have received little attention. This study uses analyses of pollen and geochemical elements in the sediments of Hulun-Nuur Lake, in northern China, to reconstruct the processes of vegetation change and soil erosion over the past ∼ 2000 years. Our aim was to explore the relationship among human activities, vegetation, and soil erosion during this period. The results show that, initially, human activities strongly affected the vegetation cover and composition, which resulted in increased soil erosion. However, the pollen data indicate the recovery of pine forest since the Ming Dynasty, likely related to deliberate reforestation indicated by historical documentary evidence. This early environmental restoration may have been prompted by the harsh climatic environment and the need of defensive measures against incursions by Mongolian cavalry. Overall, our study provides an early example of the implementation of environmental restoration measures in a fragile ecological environment.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109473"},"PeriodicalIF":5.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155555","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}

引用次数: 0

Influence of inter particle force and flow velocity on the motion of clay particles during soil erosion 土壤侵蚀过程中粒间力和流速对粘粒运动的影响

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-27 DOI: 10.1016/j.catena.2025.109488

Mao Qiu , Xiaochao Zhang , Xiangjun Pei , Xi Yang , Xiaoyi Zhao , Hongchao Xi , Jining Zhang , Renji Zhang , Renjie Wei , Yu Zhou

{"title":"Influence of inter particle force and flow velocity on the motion of clay particles during soil erosion","authors":"Mao Qiu , Xiaochao Zhang , Xiangjun Pei , Xi Yang , Xiaoyi Zhao , Hongchao Xi , Jining Zhang , Renji Zhang , Renjie Wei , Yu Zhou","doi":"10.1016/j.catena.2025.109488","DOIUrl":"10.1016/j.catena.2025.109488","url":null,"abstract":"<div><div>Clay particle movement during soil erosion is jointly controlled by macroscopic hydrodynamic and microscopic interparticle forces (electrostatic repulsion, van der Waals forces, and hydration repulsion); however, the microscopic mechanical mechanisms remain unclear. This study established a visual microfluidic experimental platform, adjusting interparticle forces by controlling the electrolyte concentration, and combined it with a high-speed photography system to investigate the effects of fluid velocity and interparticle forces on clay particle separation, migration, and collision-adhesion behavior. The results indicated that an increase in the net repulsive force between the particles significantly weakens soil erosion resistance. The critical threshold for the net repulsive force at a particle spacing of 2 nm was 5.72 atm. Beyond this threshold, the proportion of particles with a diameter of less than 20 μm released from the breakdown of clay aggregates exceeds 70 %. Moreover, the erosion rates increase by more than sevenfold, and the proportion of individual transported particles sharply increases. Below this threshold, attractive forces dominate, particles tend to aggregate, and erosion occurs primarily through block detachment, resulting in lower erosion rates. Increasing the flow velocity significantly amplifies erosion rates; a 10-fold increase in flow velocity results in a 7.5–13-fold increase in erosion rates. Additionally, the flow velocity governs the particle collision frequency. Overall, the flow velocity and particle–particle repulsive forces synergistically drive erosion; however, flow velocity’s contribution is dominant. This study quantitatively revealed the erosion mechanism driven by flow velocity dominance and interparticle force synergy, providing new insights into the microscopic mechanics of clay erosion.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109488"},"PeriodicalIF":5.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217434","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}

引用次数: 0

Numerical modeling of debris flow dynamics considering boulder entrainment, transport, and impulse stress 考虑岩石夹带、搬运和冲击应力的泥石流动力学数值模拟

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-27 DOI: 10.1016/j.catena.2025.109464

T. Kang , S. Lee , M. Kim

{"title":"Numerical modeling of debris flow dynamics considering boulder entrainment, transport, and impulse stress","authors":"T. Kang , S. Lee , M. Kim","doi":"10.1016/j.catena.2025.109464","DOIUrl":"10.1016/j.catena.2025.109464","url":null,"abstract":"<div><div>Designing protective structures against debris flows requires knowledge of flow velocity, bed changes, and impact forces. However, few studies focus on boulder entrainment and behavior, pointing to the need for better prediction methods. To address this, a hybrid approach combining grid-based methods (for pressure computation) and particle-based methods (for transport modeling) is proposed. This study uses a numerical model to simulate debris flow in a real scale area. A boulder dynamics module was added to model boulder entrainment triggered by an erosion depth threshold. Model validation was conducted by comparing simulation results with field investigation data, including damage assessments, and boulder entrainment analysis from photographs. The maximum potential impulse stress was calculated using various boulder profiles (diameter and quantity) to assess impulse stress in damaged areas. The developed model reproduced well the dynamic interactions of debris flow and boulders, indicating processes of entrainment, erosion, and deposition. Furthermore, findings revealed that boulder size significantly impacts impulse force, surpassing the influence of boulder quantity. Even with fewer boulders, an increased total mass intensifies debris flow hazards. This study underscores the importance of assessing both boulder size and quantity in landslide-prone areas to develop effective risk mitigation strategies.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109464"},"PeriodicalIF":5.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145217436","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}

引用次数: 0

Effects of forest gaps on the humification process of deadwood in the subalpine forest 林隙对亚高山森林枯木腐殖化过程的影响

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-27 DOI: 10.1016/j.catena.2025.109495

Zhuang Wang, Qin Wang, Rui Cao, Lifeng Wang, Wanqin Yang

{"title":"Effects of forest gaps on the humification process of deadwood in the subalpine forest","authors":"Zhuang Wang, Qin Wang, Rui Cao, Lifeng Wang, Wanqin Yang","doi":"10.1016/j.catena.2025.109495","DOIUrl":"10.1016/j.catena.2025.109495","url":null,"abstract":"<div><div>Knowledge regarding forest gap effects on deadwood humification and humus accumulation remains unknown, although the decomposition and humification of deadwood, a structural component of forest ecosystems, play a crucial role in the global carbon cycle and soil organic matter accumulation. We conducted an in situ decomposition experiment of <em>Abies faxoniana</em> (Minjiang fir) to assess how gap positions (closed canopy, gap edge, and gap center) influence the humification and accumulation of humic substances (HS), humic acid (HA), and fulvic acid (FA) in bark, sapwood, and heartwood across five decay classes (I–V) during the warming (Feb–Aug) and cooling (Aug–Feb) seasons. Results showed that forest gaps primarily facilitated bark humification but inhibited heartwood humification. The interactive effects of gap position and decay class on HS, HA, and FA accumulation were weak across all wood tissues. Furthermore, under the closed canopy, the HS and FA amounts increased during the warming season and decreased during the cooling season for all wood tissues, whereas the opposite seasonal trend occurred in sapwood and heartwood in the gap center. Notably, bark in the gap center showed marked increases in HS, HA, and FA during the warming season. These findings suggest that forest gaps enhance the contribution of bark humification but reduce that of heartwood to soil organic carbon accumulation, and that seasonal warming further amplifies this forest gap effect, which has significant implications for predicting deadwood carbon cycling under climate change in subalpine forests.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109495"},"PeriodicalIF":5.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155554","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}

引用次数: 0

Enhancing soil organic carbon sequestration through slope-to-terrace conversion and mixed planting: Insights from carbon pool composition and biomarker dynamics 通过坡地转换和混合种植增强土壤有机碳固存：来自碳库组成和生物标志物动态的见解

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-26 DOI: 10.1016/j.catena.2025.109482

Guan Wang , Sheng Zhang , Zihe Zhou , Jinhua Cheng

{"title":"Enhancing soil organic carbon sequestration through slope-to-terrace conversion and mixed planting: Insights from carbon pool composition and biomarker dynamics","authors":"Guan Wang , Sheng Zhang , Zihe Zhou , Jinhua Cheng","doi":"10.1016/j.catena.2025.109482","DOIUrl":"10.1016/j.catena.2025.109482","url":null,"abstract":"<div><div>Soil organic carbon (SOC) plays a critical role in climate regulation and soil fertility. Extensively distributed agricultural lands hold significant potential for ecological carbon sequestration, the process by which natural and managed ecosystems capture and store atmospheric carbon over time, making the improvement of SOC storage and stability essential for sustainable farmland management. In this study, we examined the effects of slope-to-terrace conversion and mixed planting on SOC pool composition and stability in hilly farmlands of southwestern China. Soil samples were collected from sloped monoculture, terraced monoculture, and mixed-planting terraced farmlands to assess SOC content and its critical components. Microbial necromass and plant lignin inputs were quantified using amino sugar and lignin phenol biomarkers. Results showed that slope-to-terrace conversion significantly increased SOC and mineral-associated organic carbon (MAOC) contents by 105–204 % and 116–338 %, respectively, indicating improved soil carbon retention via terracing. Mixed planting further enhanced labile carbon fractions (e.g. easily oxidizable organic carbon, particulate organic carbon), microbial biomass carbon (MBC), and microbial necromass contents by over 10 %, particularly bacterial-derived carbon in maize systems and fungal-derived carbon in citrus systems, emphasizing the role of diversified plant litter inputs in supporting microbial carbon turnover and cycling. However, the relative contributions of microbial residues and plant lignin to total SOC remained unchanged, suggesting no substantial improvement in long-term SOC stability. These findings demonstrate that while slope-to-terrace conversion and mixed planting effectively expand the SOC pool size and microbial inputs, they do not significantly enhance long-term SOC stabilization.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109482"},"PeriodicalIF":5.7,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155551","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}

引用次数: 0

Radiocarbon age offsets in loess sediments from the southern Tibetan Plateau: modulated by vegetation productivity and aeolian dynamics

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-26 DOI: 10.1016/j.catena.2025.109489

Yan Hu , Weijian Zhou , Peng Cheng , Yuda Chui , Jie Zhou , Ling Yang , Wenli Li , Haiyan Zhao , Huachun Gu , Mengyu Li , Xuefeng Lu

{"title":"Radiocarbon age offsets in loess sediments from the southern Tibetan Plateau: modulated by vegetation productivity and aeolian dynamics","authors":"Yan Hu , Weijian Zhou , Peng Cheng , Yuda Chui , Jie Zhou , Ling Yang , Wenli Li , Haiyan Zhao , Huachun Gu , Mengyu Li , Xuefeng Lu","doi":"10.1016/j.catena.2025.109489","DOIUrl":"10.1016/j.catena.2025.109489","url":null,"abstract":"<div><div>Bulk organic matter (OM) is commonly used as an alternative when reliable radiocarbon dating materials are unavailable. However, due to its heterogeneous carbon sources, bulk OM often yields significant age offsets (Δt). While such offsets have provided insights into carbon cycle dynamics in lacustrine and marine sediments, their variability patterns and underlying mechanisms in aeolian loess remain poorly understood. Here, we reconstruct centennial to millennial scale Δt variations from the GG loess-paleosol sequence on the southern Tibetan Plateau by comparing bulk OM ages with reliable charcoal controls. Δt values fluctuate markedly (700–4050 yrs) and exhibit strong covariation with environmental proxies, including loss-on-ignition, magnetic susceptibility, and grain size. Our results show that Δt variability is primarily shaped by (1) climate-controlled vegetation productivity, (2) aeolian-regulated sediment supply, and a limited influence of (3) post-depositional alteration. These findings refine our understanding of organic carbon dynamics in loess systems and help improve the reliability of bulk OM-based chronologies in arid and semi-arid environments.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109489"},"PeriodicalIF":5.7,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155548","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}

引用次数: 0

High-resolution industrial history archived by artificial radionuclides in Lake Khanka’s (Xingkai) sediments and catchment 汉卡湖（兴凯）沉积物和集水区人工放射性核素记录的高分辨率工业历史

IF 5.7 1区农林科学

Catena Pub Date : 2025-09-26 DOI: 10.1016/j.catena.2025.109478

Natalia Kuzmenkova , Vladimir Petrov , Ksenia Savelieva , Alexandra Fedotova , Eduard Tokar , Jiang Sun , Zhao Huang , Shan Xing , Keliang Shi , Xiaolin Hou , Stepan Kalmykov

{"title":"High-resolution industrial history archived by artificial radionuclides in Lake Khanka’s (Xingkai) sediments and catchment","authors":"Natalia Kuzmenkova , Vladimir Petrov , Ksenia Savelieva , Alexandra Fedotova , Eduard Tokar , Jiang Sun , Zhao Huang , Shan Xing , Keliang Shi , Xiaolin Hou , Stepan Kalmykov","doi":"10.1016/j.catena.2025.109478","DOIUrl":"10.1016/j.catena.2025.109478","url":null,"abstract":"<div><div>Lake sediment is continuously formed by gradually atmospheric deposition of air particles and the riverine input, it records information of environmental changes in the past year. Accumulated history of human industrial activities, especially since the 1950s, was reconstructed through analysis of sediment cores collected in Lake Khanka (Xingkai) located in the East Asia. Sediment cores collected from different locations in Lake Khanka (Xingkai), as well as surface soil surrounding the lake and sediment of the Spasovka River flowing into Lake Khanka (Xingkai) were analyzed for artificial (<sup>137</sup>Cs, <sup>239,240</sup>Pu, <sup>241</sup>Am, <sup>237</sup>Np) and natural (<sup>238</sup>U, <sup>232</sup>Th, <sup>40</sup>K) radionuclides. Varied sedimentation rate across sections of Lake Khanka (Xingkai) was observed, which is mainly influenced by particles load in the inflowing rivers and the distance to the mouth of the inflowing rivers. The level, distribution of temporal variation of anthropogenic radionuclides <sup>137</sup>Cs, plutonium isotopes, <sup>237</sup>Np and <sup>241</sup>Am in the sediments and soil indicate that this area only received global fallout without local sources of contamination. Intensive leaching of <sup>40</sup>K from the catchment area of Lake Khanka (Xingkai) was detected, which might attribute to the soil features of this area. We demonstrate the preponderance of sediment runoff for radionuclide migration in the sediment column over diffusion and chemical processes.Anthropogenic pressure on Lake Khanka (Xingkai) is reflected in sedimentation rates linked to land use, while artificial radionuclides serve as precise tracers of radioactive contamination linked to the global fallout, providing a chronological archive of human impact without local contamination signals.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"260 ","pages":"Article 109478"},"PeriodicalIF":5.7,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155553","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}

引用次数: 0

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