Catena最新文献

{"title":"Distinct co-occurrence patterns and assembly processes of abundant and rare taxa under cadmium stress in volcanic areas","authors":"Qingchen Xiao ,&nbsp;Boyan Wang ,&nbsp;Ye Cui ,&nbsp;Zishan Li ,&nbsp;Xiaowan Geng ,&nbsp;Keqing Lin ,&nbsp;Xiaoyu Li ,&nbsp;Jin Chen","doi":"10.1016/j.catena.2024.108604","DOIUrl":"10.1016/j.catena.2024.108604","url":null,"abstract":"<div><div>Microorganisms play a crucial role in coping with environmental stresses such as heavy metals in terrestrial ecosystems. However, elucidating the environmental adaptations and ecological processes of abundant and rare taxa is a core but less known theme. The diversity, co-occurrence networks, and the assembly processes of abundant and rare taxa were compared and analyzed in volcanic soils. The findings indicated that the shannon and richness of rare taxa was generally higher than that of abundant taxa. Furthermore, compared with rare taxa, abundant taxa indicated greater stability and resistance. Co-occurrence patterns revealed that abundant taxa exhibited a higher number of interspecific interactions in response to cadmium (Cd) stress, and fungi and archaea generated higher modularity in high Cd environment. Additionally, the assembly process of abundant taxa in volcanic soils was mainly influenced by stochastic processes, whereas deterministic processes were increasingly enhanced in rare taxa. These findings provide value for understanding the assembly processes of bacteria, fungi, and archaea, and conduce to a deeper comprehension of the environmental adaptations exhibited by both abundant and rare taxa in extreme volcanic environments.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108604"},"PeriodicalIF":5.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757035","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}

{"title":"Holocene pollen records from a large shallow lake in East Asia: Complexity of climate changes, environmental variations, and human activities","authors":"Changhong Liu ,&nbsp;Yawen Ge ,&nbsp;Yuecong Li ,&nbsp;Gaihui Shen ,&nbsp;Xiaolan Yang ,&nbsp;Zijing She ,&nbsp;Baoshuo Fan ,&nbsp;Huiyuan Jia","doi":"10.1016/j.catena.2024.108586","DOIUrl":"10.1016/j.catena.2024.108586","url":null,"abstract":"<div><div>The lack of consecutive Holocene sedimentary records in large shallow lakes poses a significant challenge for attaining a comprehensive understanding of long-term correlations among climate and environmental changes, as well as human activity worldwide. This paper presents detailed pollen records from a typical open Lake Baiyangdian which helped to reconstruct multiple environmental processes and human activities in North China during the Holocene, and to detect the complexity of the reconstruction results. The Baiyangdian area experienced a gradual expansion of wetlands since the early Holocene which then transformed into vast delta swamps due to the Holocene transgression of the Bohai Sea. The subsequent regression resulted in the degradation of the swamps and the formation of grassland 6,500–4,500 cal yr BP. The area quickly became a shallow lake after 4,500 cal yr BP, and then gradually expanded with the strengthening of river processes. The relatively warm mid-Holocene climate significantly accelerated the emergence of agriculture, notably the slash-and-burn cultivation after 6,500 cal yr BP, and the continuous intensification of agricultural activities after 4,000 cal yr BP. Human activity became a significant factor of the environmental change in the Baiyangdian Lake region since 2700 cal yr BP. Our results indicate that the Holocene pollen records from large shallow lakes are often complicated by sedimentary processes and human activity, and should be carefully considered when reconstructing past climatic and environmental changes.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108586"},"PeriodicalIF":5.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757029","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}

{"title":"Evaluating land use and climate change effects on soil organic carbon. A simulation study in coconut and pineapple systems in west coast India","authors":"Venkatesh Paramesha ,&nbsp;Parveen Kumar ,&nbsp;Rosa Francaviglia ,&nbsp;Arun Jyoti Nath ,&nbsp;Gaurav Mishra ,&nbsp;Revappa Mohan Kumar ,&nbsp;Sulekha Toraskar ,&nbsp;Saunskruti Rakhunde","doi":"10.1016/j.catena.2024.108587","DOIUrl":"10.1016/j.catena.2024.108587","url":null,"abstract":"<div><div>Global climate projections highlight the severe impact of changing rainfall patterns and temperature variations on ecosystems in Asia. This study investigates how land use conversion and climate change affect soil health and carbon storage, emphasizing the need for climate-smart agricultural practices to achieve sustainable production and mitigate climate change. Specifically, we aim to assess the soil organic carbon (SOC) storage potential of different agricultural systems in Southwestern India, including monocultures of pineapple and coconut, a coconut + pineapple intercropping system, and a natural forest as a control. The study evaluated SOC storage across these land use types using field measurements and the RothC simulation model. We also examined the long-term effects of these cropping systems on SOC dynamics under two climate change scenarios: RCP4.5 and RCP8.5. These scenarios differ in projected CO₂ emissions, temperature increases, and rainfall patterns, with RCP8.5 representing a more extreme climate scenario. The results indicate that SOC stock was highest in the natural forest soil (81.1 Mg C/ha) and lowest in the pineapple monoculture (36.7 Mg C/ha), indicating significant SOC loss due to forest conversion to pineapple plantations. Under climate change scenarios, pineapple plantations are predicted to experience a substantial decrease in SOC compared to natural forests, whereas coconut systems maintained steady-state conditions. Notably, the coconut + pineapple intercropping system showed an increasing trend in SOC stocks. Changes in SOC were more pronounced under the RCP4.5 scenario, due to the combined effects of increased temperatures and rainfall in the mid-term (2060 s) and long-term (2080 s). Our findings suggest that integrating coconut land use systems with tree components and pastures can enhance regional carbon budgets and provide a viable strategy for climate change adaptation and mitigation. Promoting such climate-smart agricultural practices will be crucial in maintaining SOC storage and improving soil health under future climate conditions.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108587"},"PeriodicalIF":5.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757027","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}

{"title":"Hydroclimate variability in southeastern Tibetan Plateau since the late Quaternary: Insights from hydrogen isotopes in sedimentary leaf waxes","authors":"Lei Huang ,&nbsp;Liping Zhu ,&nbsp;Yongsong Huang ,&nbsp;Junbo Wang ,&nbsp;Jianting Ju ,&nbsp;Qingfeng Ma","doi":"10.1016/j.catena.2024.108569","DOIUrl":"10.1016/j.catena.2024.108569","url":null,"abstract":"<div><div>Hydroclimate variations in the Tibetan Plateau, particularly its southeastern region, significantly influence downstream agricultural and ecological systems. However, the dynamics of these changes remain inadequately understood. In this study, we present a 28.6 thousand-year record of precipitation hydrogen isotopes (δD_p) derived from sedimentary leaf wax n-alkanoic acids (C₃₀, δD_wax) from Mang Co Lake, a lake in the southeastern Tibetan Plateau. Our analysis interprets δD_p as a proxy for Indian Summer Monsoon (ISM) intensity, revealing its strongest phase during both the early Holocene and 28.6–26.5 calibrated thousand years before present (Cal ka BP), as well as its weakest during the Last Glacial Maximum (LGM). We find that summer insolation is the primary driver of ISM variability on the orbital scale over the past 28.6 ka. Millennial scale δD_p variability reflects interactions between the summer monsoon and the westerly jet (WJ). The δD_p record reveals that in the periods of 5–3 Cal ka BP and 1–0 Cal ka BP, a weakened ISM coincided with the WJ’s prolonged residence south of the Tibetan Plateau. Abrupt cooling events due to albedo feedback of ice and snow in high latitudes are inferred to have played a critical role in modulating the atmospheric circulation patterns, including the position and intensity of the WJ and ISM. Our findings emphasize the high sensitivity of the southeastern Tibetan Plateau’s hydroclimate to global climate changes, necessitating future reconstructions with improved temporal and spatial resolution.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108569"},"PeriodicalIF":5.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757028","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}

{"title":"Soil organic carbon sources exhibit different patterns with stand age in rhizosphere and non-rhizosphere soils","authors":"Guopeng Wu ,&nbsp;Xu Li ,&nbsp;Shuyidan Zhou ,&nbsp;Xujun Liu ,&nbsp;Zhiyang Lie ,&nbsp;Luis Carlos Ramos Aguila ,&nbsp;Wenfang Xu ,&nbsp;Juxiu Liu","doi":"10.1016/j.catena.2024.108579","DOIUrl":"10.1016/j.catena.2024.108579","url":null,"abstract":"<div><div>The sources of soil organic carbon (SOC) determine its stability and dynamics. However, in the soil’s active zone − rhizosphere, the sources and regulatory mechanisms of SOC are still unclear, and the rhizosphere and non-rhizosphere soils may exhibit variations depending on stand age. We collected rhizosphere and non-rhizosphere soils from a typical subtropical evergreen broadleaf forest (<em>Castanopsis hystrix</em> plantations) at six distinct stand age in the South Subtropical region, using soil amino sugars and lignin phenols content to characterize microbial-derived carbon and plant-derived carbon, respectively. The results indicated that the SOC sources varied significantly in rhizosphere soils while remained stable in non-rhizosphere soils. Soil amino sugars content in rhizosphere soils was higher than non-rhizosphere soils and increased with stand age, leading to the rhizosphere effect on soil amino sugars content significantly increased with stand age. Soil lignin phenols content in rhizosphere soils was initially lower than that in non-rhizosphere soils at 6–––10 stand age, but it increased significantly over time, resulting in a significantly increased in the rhizosphere effect on soil lignin phenols content with stand age. Further analysis revealed that the SOC sources were jointly regulated by stand age and rhizosphere effect during forest restoration, in which the fungal and bacterial phospholipid fatty acids were key factors to drive the variation in soil amino sugars while litter C:N ratio and fine root biomass accounted for the patterns of soil lignin phenols. Therefore, we found significant differences in the patterns and driving factors of SOC sources between rhizosphere and non-rhizosphere soils with stand age, emphasizing the importance of considering the rhizosphere effect when studying soil carbon dynamics during forest restoration.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108579"},"PeriodicalIF":5.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757103","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}

{"title":"Advances in sheet erosion and rainfall simulator performance: A comprehensive review","authors":"Kadir Gezici ,&nbsp;Selim Şengül ,&nbsp;Erdal Kesgin","doi":"10.1016/j.catena.2024.108601","DOIUrl":"10.1016/j.catena.2024.108601","url":null,"abstract":"<div><div>Sheet erosion (SE) is the process of erosion of the upper layer on the soil surface by water, wind, or human activities. This pivotal stage initiates substantial soil loss and marks the onset of erosion while also encompassing concerns such as deteriorating soil quality, diminishing vegetation cover, and water resource pollution. For this reason, this phenomena, which is critical in terms of environmental, agricultural, energy production, water resources management, and economic sustainability, involves different disciplines such as environment, civil engineering, and agriculture. The primary factors influencing sheet erosion comprise rainfall intensity, slope gradient, vegetation density, soil characteristics, and hydrodynamic variables like shear stress and stream power. The primary objective of this review is to outline the calibration process and assess the suitability of a rainfall simulator (RS) for conducting experimental studies on sheet erosion. Subsequently, the experimental methodology for sheet erosion is also introduced, followed by an analysis and evaluation of both future research proposals and the current scope of studies in the field. Results from studies employing RSs to investigate processes affecting sheet SE highlighted that rainfall intensity and surface slope are the most influential parameters in predicting SE rates, with rainfall intensity exerting a more dominant effect. Particularly in the context of particle detachment and transport resulting from raindrop impact on the soil surface, reducing raindrop velocity (surface plant coverings, conservation tillage, shrubs, straw) impact can mitigate detachment and transport processes. Considering the importance and wide-ranging impact of the subject, with the detailed experimental methodology obtained in recent research, this paper aims to piece together a state-of-the-art understanding of the dynamic process of sheet erosion. Finally, methodology becomes apparent as a guide for future research and for use in academic papers. This paper aims to contribute to the academic literature by providing a basis for future research.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108601"},"PeriodicalIF":5.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757106","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}

{"title":"Unraveling the spatial heterogeneity of dissolved organic matter characteristics from the optical level in slope-gully systems","authors":"Yu-yan Yang ,&nbsp;Hao Wang ,&nbsp;Zi-xin Wang ,&nbsp;Qing-wei Zhang ,&nbsp;Ren Geng ,&nbsp;Jian Wang ,&nbsp;Ming Li","doi":"10.1016/j.catena.2024.108567","DOIUrl":"10.1016/j.catena.2024.108567","url":null,"abstract":"<div><div>Dissolved organic matter (DOM) is a crucial component of soil organic matter, and it significantly affects a range of environmental processes. However, few studies have focused on the spatial heterogeneity of DOM characteristics in typical geomorphic units. Therefore, in this study, a southern slope-gully system (SGS) and a northern slope-gully system (NGS) widely distributed in semiarid regions were selected as the study objects. Soil samples were collected from the three soil horizons (i.e., top horizon (0–2 cm), middle horizon (3–20 cm), bottom horizon (21–50 cm)) at each landscape locations (i.e., summit (SU), middle ridge slope (MS), lower ridge slope (LS), loess shoulder-line (SL), gully slope (GS), and gully floor (GF)) of the SGS and NGS. Spatial heterogeneity and controlling factors of DOM characteristics in the slope-gully systems were identified systematically using the optical techniques and principal component analysis. Results indicated that the dissolved organic carbon (DOC) content in both SGS and NGS followed the modes of top horizon (261.39 mg kg⁻¹, 347.31 mg kg⁻¹) &gt; middle horizon (178.47 mg kg⁻¹, 164.83 mg kg⁻¹) &gt; bottom horizon (83.19 mg kg⁻¹, 100.42 mg kg⁻¹). Three fluorescence components (i.e., two humic-like substances and one protein-like substance) were identified from all soil samples. The proportion of protein-like component of the NGS was higher than that of the SGS for the bottom horizon. DOM of the top and middle horizons were mainly from plant source with high aromaticity and molecular weight, whereas DOM of the bottom horizon was mostly dominated by microbial source with low aromaticity and molecular weight. Landscape location significantly influenced the aromaticity, humification degree, and source of DOM in the top horizon. The variation in DOM characteristics of slope-gully system was primarily attributed to the difference in characteristics of biocrusts, roots, and litter driven by topographic conditions.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108567"},"PeriodicalIF":5.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757104","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}

{"title":"Influence of vegetation restoration strategies on seasonal soil water deficit in a subtropical hilly catchment of southwest China","authors":"Jiapan Xu ,&nbsp;Muxing Liu ,&nbsp;Jun Yi ,&nbsp;Shenglong Li ,&nbsp;Jun Zhang ,&nbsp;Hailin Zhang","doi":"10.1016/j.catena.2024.108578","DOIUrl":"10.1016/j.catena.2024.108578","url":null,"abstract":"<div><div>Large-scale vegetation monitoring enabled by satellite technology has indicated a global increase in vegetation greenness. The increased soil moisture consumption associated with vegetation restoration may trigger seasonal soil water deficits, limiting sustainable ecosystem recovery. However, the inherent mechanisms of this phenomenon remain unclear, particularly in subtropical hilly regions with frequent seasonal drought occurrences. In this study, we conducted a three-year field observation of volumetric soil water content for three restoration strategies in a re-vegetated hilly catchment of southwest China. These restoration strategies included planted forest (PF) and natural restoration (naturally regenerated forest, NF; deforested pasture, DP). By comparing the soil water storage (SWS) and soil water deficit index (SWDI) among different restored vegetation in the growing and non-growing seasons, the effects of these land-use managements on soil water deficits and their controlling factors were investigated. The results showed that, average SWS of PF was significantly (<em>p</em> &lt; 0.05) lower than that of NF and DP during both growing and non-growing seasons, regardless of slope position. Besides, the soil water deficits primarily occurred during the vegetation growing seasons from May to October, and the frequency of drought occurrences was higher in PF (46.2 %) in comparison to NF (45.3 %) and DP (44.7 %). Particularly, the frequency of severe drought occurrences in PF was 12.0 %, significantly (<em>p</em> &lt; 0.05) higher than that in NF (2.9 %) and DP (1.6 %). The dominant meteorological factor controlling soil water deficits was precipitation (contribution rate = 38.8 %) during the growing seasons. Contrastingly, soil water deficits during the non-growing seasons were mainly controlled by potential evapotranspiration (contribution rate = 32.7 %). Overall, the indexes of SWS and SWDI offer a quantitative framework for assessing the extent of seasonal soil drought. This study highlights the higher vulnerability to soil drought associated with afforestation as compared with natural regeneration, which should be considered when evaluating the ecosystem services provided by vegetation restoration.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108578"},"PeriodicalIF":5.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757105","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}

{"title":"Dust emission from different land use types based on the PI-SWERL test","authors":"Yong Wang ,&nbsp;Ping Yan ,&nbsp;Yijiao Wang ,&nbsp;Xiaoxu Wang ,&nbsp;Wei Wu ,&nbsp;Miao Dong","doi":"10.1016/j.catena.2024.108577","DOIUrl":"10.1016/j.catena.2024.108577","url":null,"abstract":"<div><div>Dust emissions have important impacts on the ecological environment and air quality. To explore the underlying mechanisms, characteristics and influence factors of the dust emission from different land use types along the northern dust transport path of Beijing, a portable dust observation instrument (PI-SWERL) was used to test the dust emissions from typical land use types in both the leapfrog mode and progressive mode. The results showed that in the leapfrog mode, the dust emission concentrations (DECs) of the different land use types exhibited four patterns with increasing friction wind speed: fluctuation type, fluctuating growth type, linear growth type and growth stability type. In the progressive mode, the instantaneous dust emission fluxes (IDEFs) from the different land use types under the same friction wind speed exhibited three variation characteristics with increasing erosion time: rapid decline, decline after stabilization, and remaining stable. These variation characteristics preliminarily reflected the dust emission mechanisms and emission potentials of the different land use types. For different land types, the DEFs of grassland after crust destruction (GCD) and vineyard land (VL) were the largest, and the maximum value reached 14 mg/m²·s at a friction wind speed of 0.69 m/s. The DEFs of grassland (TS), stubble land (StL), saline-alkali land (SAL), shrubland (ShL) and grassland with crust (GC) were the lowest, with maximum DEFs of less than 0.3 mg/m²·s. The differences in dust emissions from different land types were mainly affected by the topsoil dust content, soil crust, surface vegetation and human disturbance. Under the influence of various factors, the DEFs of plowed land were 3.62–8.36 times greater than those of unplowed land and 81.78–175.50 times greater than those of grassland at friction wind speeds of 0.39, 0.55 and 0.69 m/s. The DEFs of land after removing stubble were 36.34–164.86 times greater than those of stubble land, and the DEFs of grassland after crust destruction were 50.50–195.25 times greater than those of grassland with crust. In this study, the PI-SWERL dust tests have important reference significance for analyzing dust emission mechanisms, characteristics, potential and effects of human disturbance in different land use types.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108577"},"PeriodicalIF":5.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757101","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}

{"title":"Revisiting krotovina formation using luminescence dating − a case study from NE China","authors":"Aimin Zhang ,&nbsp;Hao Long ,&nbsp;Fei Yang ,&nbsp;Jingran Zhang ,&nbsp;Jun Peng ,&nbsp;Keyang Gong ,&nbsp;Yunpeng Hong ,&nbsp;Yonghui Shi ,&nbsp;Shengfang Zhou ,&nbsp;Zhudong Shao ,&nbsp;Na Yang ,&nbsp;Xiaoling Huang ,&nbsp;Xi Luo ,&nbsp;Ganlin Zhang","doi":"10.1016/j.catena.2024.108554","DOIUrl":"10.1016/j.catena.2024.108554","url":null,"abstract":"<div><div>Krotovinas, the infilled burrows created by small mammals through bioturbation, represent a distinct pedogenic process and provide valuable records of soil and landscape history. Traditionally, macro- and micromorphological features are analyzed to investigate the origin of burrow fills, and ages are often estimated using ¹⁴C dating. However, in some environments, morphological features can be misleading and material for ¹⁴C dating is insufficient. This study explores the potential of luminescence techniques to address these issues. We studied a Chernozem profile with typical krotovinas, forming from fluvial sediment in northeast China. Three krotovinas of different depths and colors (two black and one yellow) were sampled, along with their respective supposedly undisturbed counterparts from the surrounding soil. We conducted single-grain (SG) luminescence dating of the K-feldspar fraction and multigrain (MG) luminescence dating of both quartz and K-feldspar fractions. Significant differences in luminescence ages between samples inside and outside the krotovinas at both MG and SG levels suggest the presence of vertical bioturbation. Comparisons of SG distributions among samples indicate that the yellow krotovina at <em>ca.</em>70 cm was the result of upward transportation from a lower layer and was formed after the end of the Last Glacial Maximum. The two black krotovinas at <em>ca.</em> 80 and 160 cm are genetically linked, and probably formed in a single, rapid, simultaneous filling event occurring no earlier than 2.7 ka. This study highlights the unique role of luminescence dating in elucidating formation processes of krotovinas and the soils in which they are found.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108554"},"PeriodicalIF":5.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757102","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}