Catena最新文献

{"title":"Transformation of slope microrelief across an unused mountain forest road – Analysis over an 8-year period (Tatra Mts, Poland)","authors":"Joanna Fidelus-Orzechowska ,&nbsp;Paweł Ćwiąkała ,&nbsp;Edyta Puniach ,&nbsp;Dariusz Strzyżowski","doi":"10.1016/j.catena.2025.109085","DOIUrl":"10.1016/j.catena.2025.109085","url":null,"abstract":"<div><div>The main aim of the paper was to determine the rate of morphogenetic processes on a road that had been abandoned and the directions of road development. The research was conducted in the Lejowa Valley in the Tatra Mountains in southern Poland. To determine the rate of changes, we used data from Terrestrial Laser Scanning (TLS) (2019–2020) and unmanned aerial vehicle (UAV)-derived photogrammetric data (2022–2023). The research showed that, between the two study periods (2019–2020 and 2022–2023) the difference in erosion rate was not statistically significant within the roadbed but was significant for the roadbanks. The net change in roadbed erosion rate was from −432 m³ ha⁻¹ yr⁻¹ (2019–2020) to −308 m³ ha⁻¹ yr⁻¹ (2022–2023). The net change for roadbanks in each period was erosion and equalled −247 m³ ha⁻¹ yr⁻¹ (2019–2020) and −146 m³ ha⁻¹ yr⁻¹ (2022–2023). Changes across the alluvial fan at the end of the road in 2022–2023 were an accumulation of +260 m³ ha⁻¹ yr⁻¹. The development of microrelief within the road strictly depends on the course of deep and lateral erosions, which is modified by the road intercepting of additional runoff from the denudation valley and springs, by flow being redirected by debris such as uprooted trees, or by exposed bedrock.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109085"},"PeriodicalIF":5.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895274","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":"Grain size distribution patterns and influencing factors of surface sediments in deserts and sandy lands in China","authors":"Jie Yin ,&nbsp;Bo Wu ,&nbsp;Eerdun Hasi ,&nbsp;Xiaohong Jia ,&nbsp;Zhizhu Su ,&nbsp;Yingjun Pang ,&nbsp;Bingqiang Fei ,&nbsp;Lingguang Zhang ,&nbsp;Xiaomin Xiu","doi":"10.1016/j.catena.2025.109051","DOIUrl":"10.1016/j.catena.2025.109051","url":null,"abstract":"<div><div>Drawing from the systematic collection and integration of grain size measurement data of surface sediments in Chinese deserts and sandy lands, their spatial patterns and distribution characteristics were clarified, and the influencing factors and formation mechanisms were thoroughly investigated. The results revealed that the differences in sediment grain size composition and distribution were more pronounced in western deserts compared to eastern sandy lands. Except for the Taklimakan Desert (TAD) in western China and Ulan Buh Desert (UBD) in central part of China, most deserts and sandy lands were dominated by fine (125–250 μm) and medium sand (250–500 μm). Sediment grain sizes varied among deserts, with the TAD having the smallest mean particle size (121.59 μm) and the Kumtagh Desert (KD) in western China the largest (248.50 μm). In contrast, sandy lands displayed relatively consistent grain sizes (193.21–237.06 μm). Sediment sorting in deserts was generally better, while in sandy lands were not well-sorted, with the Hulun Buir Sandy Land (HBSL) in eastern China showing the poorest sorting (1.06 Φ), and others displayed moderate sorting (0.80–0.99 Φ). Furthermore, the grain size distributions in both deserts and sandy lands were positively skewed or nearly symmetrical, with narrow to medium peak states. Western deserts were strongly influenced by natural conditions. Due to differences in local terrain and sand supply, their sediments did not exhibit the typical trend of becoming finer along the prevailing wind direction. In contrast, eastern sandy lands, along with the Gurbantunggut Desert (GD) which directly benefits from moisture supplied by westerlies, displayed better vegetation coverage and well-developed biological soil crusts. These factors redistributed surface sediments, preventing the downwind differentiation of grain size. The grain size composition and distribution of sediments in deserts and sandy lands are shaped by a complex interplay of factors. Therefore, these characteristics are unsuitable for use as proxy indicators when reconstructing the historical climate and environmental evolution of deserts and sandy lands.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109051"},"PeriodicalIF":5.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895273","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":"Effects of tung oil and its induced hydrophobicity on the cracking behavior of purple soil exposed to wetting–drying cycle conditions","authors":"Qiyong Zhang ,&nbsp;Jingtao Yang ,&nbsp;Yuzhen Kong","doi":"10.1016/j.catena.2025.109112","DOIUrl":"10.1016/j.catena.2025.109112","url":null,"abstract":"<div><div>Desiccation cracking is a common natural phenomenon in near-surface soils, often leading to geological disasters and soil erosion. Organic additive can influence soil cracking behavior, but the impact of hydrophobicity induced by organic additive on this behavior has not been thoroughly studied. Previous studies have shown that tung oil is widely used in soil treatment and serves as a highly effective inducer of soil hydrophobicity. Therefore, this study investigates the effects of tung oil and its induced hydrophobicity on the cracking behavior of purple soil exposed to wetting–drying cycle conditions. The research employs laboratory simulations, long-term monitoring, and image processing techniques. The results show that the hydrophobic effect causes soil samples to crack at higher water content and increases the maximum cracking velocity by impeding water migration during initial drying. During wetting–drying cycles, the differences in the changes of total crack length for 0–5% tung oil samples are mainly attributed to variations in the hydrophobicity and binding effect induced by tung oil. Regarding crack development, the hydrophobic effect of tung oil is stronger than its reinforcing effect, leading to enhanced crack formation during the final stage following initial drying.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109112"},"PeriodicalIF":5.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899814","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":"Parent materials regulate the effects of rainfall intensity and slope gradient on interrill erosion processes in the mountainous canyon regions of Southwest China","authors":"Liang Dong ,&nbsp;Genzhu Wang ,&nbsp;Haizhu Liu ,&nbsp;Xinliang Wu ,&nbsp;Tao Yang ,&nbsp;Chenghao Zheng ,&nbsp;Zichun Lu ,&nbsp;Zhiyong Zhang ,&nbsp;Jinxing Zhou","doi":"10.1016/j.catena.2025.109092","DOIUrl":"10.1016/j.catena.2025.109092","url":null,"abstract":"<div><div>Soil erosion constitutes a critical threat to the sustainability of soil and water resources. The mountainous canyon regions of Southwest China are typified by diverse parent material types, pronounced slope gradients, and hydrologically complex rainfall regimes, however, the regulatory mechanisms by which parent materials modulate rainfall intensity and slope gradient effects on erosion remain poorly elucidated. In this study, rainfall simulation experiments on the microplots were conducted on three typical parent materials (sandstone, basalt, and limestone) under two rainfall intensities (45 and 90 mm h⁻¹) and three slope gradients (10°, 20°, and 30°). The runoff coefficient (Rc), sediment concentration (Cs), sediment yield rate (Sy) and effective size characteristics were determined to unravel the interrill erosion processes in the mountainous canyon regions of Southwest China. A three-way ANOVA with categorical factors (parent material, rainfall intensity) and slope gradient as an ordinal variable was applied to quantify the main and interactive effects. The Rc, Sy, and sediment particle size were primarily influenced by rainfall intensity (F = 75.18–391.98, <em>p</em> &lt; 0.001), followed by parent material type (F = 59.90–265.40, <em>p</em> &lt; 0.001), and least by slope gradient (F = 8.67–29.44, <em>p</em> &lt; 0.001). Rainfall intensity exerted a significant positive effect: higher rainfall intensity increased the Rc, Cs, and Sy, with the magnitude of these effects decreasing in the order of sandstone &gt; basalt &gt; limestone. Sediment transport for sandstone was dominated by suspension/saltation (&lt; 0.25 mm), whereas for basalt and limestone, both suspension/saltation (0.25–1 mm) and rolling mechanisms (&gt; 1 mm) were observed. Clay particles, cation exchange capacity (CEC), and exchangeable cations (mainly exK⁺ and exCa²⁺) were strongly correlated with erosion processes under varying rainfall intensities, suggesting that parent materials influence interrill erosion primarily through aggregate stability.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109092"},"PeriodicalIF":5.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895275","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":"Topography influences primary soil basic properties and bacterial community changes: evidence from volcanic field of 300 years, northeast China","authors":"Jing Liu ,&nbsp;Honghu Liu ,&nbsp;Baoyuan Liu ,&nbsp;Yunge Zhao","doi":"10.1016/j.catena.2025.109113","DOIUrl":"10.1016/j.catena.2025.109113","url":null,"abstract":"<div><div>Topographic factor has crucial impacts on the rock weathering and soil development. However, few studies have concerned the influence of topographic features on the spatial distribution of soil properties at the initial soil development stage. To explore this, soil samples were collected from 10 soil profiles on scoria cone, and from 18 quadrats on lava plateau along the NNW-SSE toposequence in Laoheishan volcanic field of 300 years, northeast China. Basic indicators such as soil thickness, mechanical composition, organic carbon and total nitrogen and their mineral-associated fractions were measured, and soil bacterial community were identified by 16S rRNA amplicon sequencing method, and their relationships with topography were determined by Spearman rank correlation and pathway analysis. Compared to lava plateau with weak-weathered binary structure thinner than 13 cm, scoria slopes developed typical soil profiles ranging from 7 to 30 cm, with lower clay and silt fraction (e.g. topsoil: 73.75 % vs. 35.57 %), which positively associated with carbon and nitrogen contents (e.g. topsoil organic carbon: 72.32 vs. 38.59 g kg⁻¹). Northern slope had finer particles, richer carbon and nutrients than southern slope, with organic carbon peaked around middle slope position with 116.76 and 34.70 g kg⁻¹, respectively. Northern lava plateau showed distinctive differences from other topographic sites in bacterial phyla structure and functional groups. The total explanation of carbon and nitrogen contents and their stoichiometric ratio values to bacterial phyla structure accounted for 41 %. In conclusion, topography influenced clay fraction gathering, which in turn affected the accumulation of carbon and nutrients. Ultimately, it regulated shifts in bacterial diversity during the initial soil development process. This study will improve understanding of topographic-driven mechanisms of initial soil development and soil characteristics spatial patterns.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109113"},"PeriodicalIF":5.4,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895272","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":"Significant loss of organic carbon storage and accumulation rate in mangrove sediments due to deforestation: Insights from the Beibu Gulf, China","authors":"Tianyi Nie ,&nbsp;Wenpeng Li ,&nbsp;Bin Yang ,&nbsp;Mead Allison ,&nbsp;Wei Cai ,&nbsp;Fan Zhang ,&nbsp;Jiarui Zhou ,&nbsp;Tianyue Yang ,&nbsp;Xinxin Li","doi":"10.1016/j.catena.2025.109107","DOIUrl":"10.1016/j.catena.2025.109107","url":null,"abstract":"<div><div>Mangrove ecosystems in the Beibu Gulf, China, underwent severe deforestation before the 2000s. However, the influence of the deforestation event on sedimentary organic carbon (OC) biogeochemistry has not been reported in this region yet. Based on the ²¹⁰Pb chronology of four sediment cores sampled in the Beilun River Estuary National Nature Reserve, this study analyzed soil texture, bulk OC, stable and radiocarbon isotopes, and lignin biomarkers to reconstruct historical changes in OC storage and accumulation rate over the past half-century. Before the National Nature Reserve establishment in 2000, the stage of pre-establishment I (Pre-EST I, before 1970) was characterized by an average TOC of 1.24 ± 0.14 % with finer particles (76.2 ± 6.2 %), older (6406 ± 362 BP) terrestrial sources (72.2 ± 6.6 %). After significant transitional changes of all the parameters in Pre-EST II (1970–2000), the average TOC became lower (0.68 ± 0.15 %) with mainly younger (1357 ± 147 BP) marine-derived OC (52.8 ± 11.0 %) with coarser particles (59.4 ± 4.7 %) in Post-EST stage after 2000. The lignin concentration Σ₈ also decreased from 0.61 ± 0.12 mg 100 mg⁻¹ sediment in Pre-EST I to a half value of 0.32 ± 0.11 mg 100 mg⁻¹ sediment in Post-EST. The three-stage changes were attributed to deforestation before the National Nature Reserve establishment in 2000. As a result, the remnant sedimentary OC in mangrove sediments indicated not only the source change of OC, but also a decrease in carbon accumulation rate by 14.5 %, a decrease in carbon density by 30.2 % and a decrease in carbon storage by 54.0 % in Beibu Gulf, China. If the mangrove recovery rate was kept the same as in the study, the global mangrove carbon storage may increase by 1.2 Tg C till the end of this century under good protection.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109107"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891434","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":"Bioturbation in very deep tropical Ferralsols: A micromorphological study of biomantles","authors":"Mariane Chiapini ,&nbsp;Diego Luciano Nascimento ,&nbsp;Taís Almeida Santos ,&nbsp;Karina P.P. Marques ,&nbsp;Beatriz Motta Rodrigues ,&nbsp;Plinio Barbosa de Camargo ,&nbsp;Miguel Cooper ,&nbsp;Pablo Vidal-Torrado","doi":"10.1016/j.catena.2025.109084","DOIUrl":"10.1016/j.catena.2025.109084","url":null,"abstract":"<div><div>Complex soil systems such as Ferralsols have paleoenvironmentally significant characteristics, such as biogenic features, which are part of the concept of soil memory. In Ferralsols, bioturbation and ferralitization are the main long-term pedogenetic processes contributing to soil formation. While the ferralitization process and its micromorphological features are well-documented, the bioturbation process and its paleoenvironmental significance in deep Ferralsols remains poorly understood. In order to improve the understanding of the bioturbation process in Ferralsols, this study analyzed fifteen complete soil profiles from the topsoil to the saprolite zone (BC/CR horizon) in three different Brazilian regions with variations in environmental conditions. The specific biogenic features showed that the occurrence and activity of roots, earthworms, termites, ants, acari and enchytraeids in the soil profiles occurred at great depths down to 950 cm. Leaf-cutting ants and termites are the main ecosystem engineers responsible for the biogenic features identified in the fifteen studied Ferralsols. Greater complexity and reworking of biogenic features were observed in the upper part of the soil profiles, due to the greater biological activity in this area of the complex biomantle. The occurrence of a high percentage of biogenic features indicates different zones of bioturbation at depth associated with paleoclimatic variations since at least the Late Pleistocene (∼14,422 cal yrs BP). In addition, the very deep biogenic features were formed in different paleoclimatic periods and remained with few modifications until the present time. The detailed micromorphological and micromorphometric analysis from the topsoil to the weathering front enabled a hierarchy of bioturbation interpretation on a continuum and demonstrated spatial variation and zones of preferential bioturbation in soils mainly below 200 cm deep.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109084"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891443","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":"Unexpected responses of SOC decomposition and its temperature sensitivity to plant invasion across soil layers: Implications for plantation understory management","authors":"Sailan Yang ,&nbsp;Xia Xu ,&nbsp;Fanxi Peng ,&nbsp;Zhu Zhu ,&nbsp;Chonghua Xu ,&nbsp;Chenghui Ju ,&nbsp;Caiqin Shen","doi":"10.1016/j.catena.2025.109110","DOIUrl":"10.1016/j.catena.2025.109110","url":null,"abstract":"<div><div>Soil organic carbon (SOC) decomposition is a key process in regulating carbon (C) sequestration in plantation ecosystems, and its sensitivity of temperature (Q₁₀) is essential for predicting C-climate feedback. However, plantations exhibit heightened vulnerability to plant invasion due to resource fluctuations and frequent disturbances, which may significantly affect SOC decomposition. The mechanisms by which plant invasion influences SOC decomposition rate and its Q₁₀ in plantations remain poorly understood, particularly in subsoil layers. To fill the knowledge gap, we sampled topsoil and subsoil in poplar plantations, both with and without <em>Solidago canadensis</em> invasion, and conducted a 28-day incubation experiment. The results indicated that <em>S. canadensis</em> invasion increased SOC decomposition rate and its Q₁₀ in both soil layers. Notably, the primary drivers of SOC decomposition rate and its Q₁₀ vary with soil depth. In the topsoil, increased enzyme activities were the dominant factors driving SOC decomposition rate and Q₁₀. In contrast, in the subsoil, increased substrate availability played a more significant role. These findings challenge the assumption that plant effects are limited to surface soils and demonstrate that SOC dynamics in subsoil are as sensitive to plant invasion as those in topsoil, due to increased substrate availability. This emphasizes the importance of considering subsoil processes when evaluating the impacts of plant invasions. Additionally, the results suggest that we should pay attention to plantation understory vegetation management to prevent the harmful effects of plant invasions on SOC dynamics under future climate warming scenarios, effects that enhance carbon dioxide (CO₂) emissions and exacerbate regional C-climate feedbacks.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109110"},"PeriodicalIF":5.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895270","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":"Divergent drivers of temporal stability for gravel and sandy desert ecosystems around mobile deserts: Implications for ecosystem conservation and desertification management","authors":"Lemin Wei ,&nbsp;Lingfei Zhong ,&nbsp;Yifan Yue ,&nbsp;Xiangyan Feng ,&nbsp;Tao Li ,&nbsp;Dacheng Song ,&nbsp;Wenzhi Zhao","doi":"10.1016/j.catena.2025.109088","DOIUrl":"10.1016/j.catena.2025.109088","url":null,"abstract":"<div><div>Anthropogenic climate change and unreasonable land use have exacerbated desertification in recent decades. However, the biotic-environmental regulatory mechanisms for the temporal stability of desert ecosystems in the marginal areas around mobile deserts, as critical ecological safety barriers to restrict the development of desertification, are still less understood. Based on extensive field sample plot survey data and spatial data, we comprehensively assessed the contribution and driving mechanisms of biotic (vegetation pattern and species diversity) and environmental (climate, soil, spatial location and terrain) drivers to the temporal stability of gravel desert ecosystem (GDE) and sandy desert ecosystem (SDE) around the Badain Jaran Desert and Tengger Desert in Northwest China. Our results showed the temporal stability in GDE was driven by plant species diversity, and climate played an indirect role by influencing plant species diversity. The temporal stability of SDE was mainly regulated by environmental variables, with climate and soil properties directly affecting it, rather than indirectly through biotic variables. A trade-off existed between the temporal stability of SDE and vegetation productivity, which was absent in GDE. Our findings highlight the divergent biotic-environmental mechanisms underlying the temporal stability of GDE and SDE at the margins of mobile deserts. Based on these insights, we propose targeted conservation strategies for two major desert ecosystems: for GDE, focus on protecting and restoring vegetation diversity; for SDE, prioritize sand fixation and soil improvement. These results provide crucial theoretical guidance for desertification control and the sustainable management of desert ecosystems.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109088"},"PeriodicalIF":5.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891433","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":"Litter position and stoichiometry regulate plant litter decomposition and nitrogen release in terrestrial ecosystems","authors":"Wanying Yu ,&nbsp;Congwen Wang ,&nbsp;Johannes H.C. Cornelissen ,&nbsp;Xuehua Ye ,&nbsp;Zhenying Huang ,&nbsp;Deli Wang ,&nbsp;Guofang Liu","doi":"10.1016/j.catena.2025.109093","DOIUrl":"10.1016/j.catena.2025.109093","url":null,"abstract":"<div><div>Litter decomposition is a biogeochemical process that is crucial in ecosystem carbon (C) and nutrient cycling. Litter decomposition commonly occurs both on and below the soil surface, but how the position affects litter decomposition and associated C and nitrogen (N) turnover rates globally remains unclear. We collected literature-based data of 500 paired aboveground and belowground decomposition rates (<em>k</em> values) of the same litter material and ancillary traits, climate, and soil property data from 184 sites spanning five major biomes globally. Analysis of variance and hierarchical partitioning were used to examine how litter position and stoichiometry affected litter decomposition and N release rates and their relationships. Across all biomes, the belowground <em>k</em> value was 77.7% higher than the aboveground <em>k</em> value, and the belowground N release rate was 65.5% higher than the aboveground N release rate. The effects of position on litter decomposition rate depended on biomes and litter types. Litter C:N ratio was a dominant driver of net N immobilization and release of decomposing litter. The coordination between decomposition and N release rates for litters with a low C:N ratio was stronger than that with a high C:N ratio. Litter decomposition and N release rates were faster for higher-quality litter and increased towards favorable climate conditions with increasing temperature. Litter quality was the crucial predictor of the position effect on litter decomposition and recalcitrant litter was more susceptible to litter position. Together these findings indicate that soil burial enhances soil carbon and nutrient turnover rates globally, and that the litter position and stoichiometry shift the patterns of litter N immobilization and release. Incorporating the position effect and litter stoichiometry could therefore reduce the uncertainty of biogeochemical cycle models in the context of global changes that may affect the relative litter production, stoichiometry and decomposition of litter aboveground versus belowground.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"256 ","pages":"Article 109093"},"PeriodicalIF":5.4,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886275","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}