Land Degradation & Development最新文献

{"title":"A Quantitative Basis for Intersource Differences in Tracer Concentrations for Accurate Sediment Source Fingerprinting","authors":"Wei Dai, Tianmin Dang, Yi Zeng, Nanqiu Wang, Renjie Zong, Lingshan Ni, Nufang Fang, Zhihua Shi","doi":"10.1002/ldr.5490","DOIUrl":"https://doi.org/10.1002/ldr.5490","url":null,"abstract":"Sediment source fingerprinting provides support for targeted soil erosion control and land degradation mitigation. Tracer selection and source classification are the main considerations in this approach. However, the impact of tracer concentration divergences among different sediment sources on the accuracy of source apportionment remains uncertain and has not been quantitatively investigated. Here, artificial and virtual mixtures were created to explore the impact of low and high source differences on the accuracy of relative source apportionment. Additionally, global geochemical property data based on different source classification methods were collected to analyze the reliability of source classification. The results reveal that as the difference in tracer concentration between sources decreases (from 30% to 2%), the accuracy of source apportionment significantly decreased, with the mean absolute error (MAE) ranging from 5.9% to 60.1%. Furthermore, a relative deviation in tracer concentration > 10% between sources is suggested for reliable source classifications. Notably, approximately 40% of the existing papers exhibit potential issues due to low tracer concentration divergences between sources. The adoption of sediment source classification based on land use should be cautiously approached until tracer concentration divergences among major sources are examined. For catchments lacking long‐term stable vegetation, source classification methods based on geological properties are recommended. Finally, we recommend the consideration of clustering methods or alterative tracers for specific study areas to improve the accuracy of sediment fingerprinting.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"29 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Characteristics of Soil Depletion and Degradation in the Coal Fire Area of the Southern Junggar Coalfield, Xinjiang, China","authors":"Li Shen, Qiang Zeng","doi":"10.1002/ldr.5457","DOIUrl":"https://doi.org/10.1002/ldr.5457","url":null,"abstract":"Coal mining can lead to coal spontaneous combustion, especially in arid and semi‐arid areas, and soil can suffer varying degrees of depletion and degradation, which can be harmful to the regional eco‐environment. However, the characteristics of soil depletion and degradation are not yet clear in the coal fire areas, and there are fewer soil quality assessments. In this study, we studied the characteristics of soil ions, nutrient and their stoichiometric ratios at different sampling points and different thermal effects. The principal component analysis and membership function were used to calculate the soil quality index (SQI) to comprehensively evaluate the impact of different thermal effects on soil quality (SQ). The results showed that soil cations were dominated by Na<jats:sup>+</jats:sup> and anions by Cl<jats:sup>−</jats:sup> and SO<jats:sub>4</jats:sub><jats:sup>2−</jats:sup>, and the higher the temperature, the higher the concentration of SO<jats:sub>4</jats:sub><jats:sup>2−</jats:sup>. The concentrations of Na<jats:sup>+</jats:sup> and Cl<jats:sup>−</jats:sup> tended to increase with increasing temperature, while the opposite was true for K<jats:sup>+</jats:sup> and SO<jats:sub>4</jats:sub><jats:sup>2−</jats:sup>. Soil organic carbon (SOC) increased with increasing temperature, Total nitrogen (N) content was lower when heated at 40°C 5 d, and the N:P ratio was 8.99. The degree of soil degradation at this time was only lower than that at 70°C for 10 and 20 d, which indicated that the SQ was initially affected by the temperature. The analysis using principal component analysis and membership function showed that the Sikeshu (SKS) fire area (SQI = 0.183) was lower than the Wugong (WG) fire area (SQI = 0.281). In the homemade heating experiment, the SQI of the soil affected by thermal effects was lower than that of the raw soil. The SQIs were consistent at 40°C 20 d and 70°C 10 d, indicating that the effect of low temperature for a long time and high temperature for a short time on SQ can be equivalent. The results of this study provide a theoretical basis for SQ improvement and ecological restoration in coal fire areas.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"52 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating Spatial–Temporal Heterogeneity and Driving Mechanisms of Ecosystem Services Into Spatial Management Across Urban Hierarchies: A Case of the Yangtze River Economic Belt, China","authors":"Qiaoling Luo, Junfang Zhou, Mingxing Liu, Rongjun Huang","doi":"10.1002/ldr.5494","DOIUrl":"https://doi.org/10.1002/ldr.5494","url":null,"abstract":"Effective management of ecosystem services (ESs) is critical for sustainable regional development. Multi‐scale ESs assessments provide valuable insights for spatial management. However, limited attention has been given to the spatial–temporal heterogeneity and driving mechanisms of ESs across urban hierarchies and their integration into spatial management. Therefore, taking the Yangtze River Economic Belt in China as a case study, we assessed spatial–temporal heterogeneity and driving mechanisms of ecosystem service values (ESVs) across five urban hierarchies from 2000 to 2020. Results showed that the area ratios of variation in ESVs trends were typically S‐shaped from small cities to super cities. High‐value ESVs clusters decreased, and low‐value ESV clusters showed a linear increase as urban hierarchies intensified. Human activities predominantly impacted ESVs in a lower urban hierarchy, whereas terrain conditions significantly impacted ESVs in a higher urban hierarchy. Furthermore, a novel framework was proposed to integrate spatial–temporal heterogeneity and driving mechanisms of ESs into spatial management, emphasizing the multi‐scale management of ESs. This study proposed effective ESs management strategies to support region‐specific management and sustainable development.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"52 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Empowering Communities: A Low‐Cost Approach to Land and Water Management in Developing Countries","authors":"Nitin Singh, Angshuman Hazarika, Justin Zuopeng Zhang, Yuriy Bilan","doi":"10.1002/ldr.5489","DOIUrl":"https://doi.org/10.1002/ldr.5489","url":null,"abstract":"Access to water is fundamental for life, yet many citizens in developing countries face severe water shortages, exacerbated by recurring droughts, particularly in water‐stressed regions. Street‐level bureaucrats in these areas encounter the dual challenge of addressing local residents' expectations for relief while operating with constrained resources. This study examines the innovative efforts of local bureaucrats in Banda, a drought‐prone and underdeveloped district in the Indian state of Uttar Pradesh, to promote rainwater harvesting and water conservation. By leveraging limited discretionary funds and engaging local stakeholders, these initiatives have demonstrated significant positive impacts. Using on‐ground visits and official government data, the study evaluates the effects of these efforts on groundwater levels, agricultural productivity, and related indicators. Findings reveal substantial improvements, including higher groundwater levels, increased agricultural yields, and enhanced water availability for sanitation needs. This research highlights the pivotal role of water conservation initiatives driven by street‐level bureaucrats in fostering economic growth and environmental sustainability. The insights from Banda offer valuable lessons for policymakers and bureaucrats in similarly resource‐constrained settings in developing countries striving to ensure water access and resilience against drought.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"6 9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multivariate Controls of Water–Carbon Coupling Relationship Under Various Land Use Types in the Thick Loess Deposits","authors":"Ruifeng Li, Xuanhua Zhang, Wangjia Ji, Bingbing Li, Zhi Li","doi":"10.1002/ldr.5496","DOIUrl":"https://doi.org/10.1002/ldr.5496","url":null,"abstract":"Prior studies have conducted extensive investigations of the water–carbon coupling relationship for aboveground vegetation and shallow soils, but the characteristics and multivariate controls in deep soils have not been fully explored. This has important implications for better understanding the water and carbon cycles of ecosystems. In this study, we attempted to examine the water–carbon coupling relationship in 18 m profiles under farmland (F), grassland (G), willow (SP), and poplar (P) in China's Loess Plateau. Specially, the multivariate controls of the water–carbon coupling relationship at diverse depths and scales were explored via the wavelet analysis. Individually, the conversion from F to G, SP, and P decreased the soil water storage within the 0–15 m by 553 (22% of F), 557 (22%), and 943 mm (38%). Land use change had little impact on soil organic or inorganic carbon. Even so, the poplar, compared with the willow, resulted in higher vertical variations in deep water and carbon. Furthermore, land use conversion increased the coherence between soil water and carbon in the whole layer. In comparison to F, which was dominated by water retention, G, SP, and P exhibited dominant carbon sequestration. The poplar reduced the root‐mean‐square deviation between soil water and organic carbon from 0.29 (F) to 0.13 in the 6‐ to 15‐m layer and between soil water and inorganic carbon from 0.32 (F) to 0.20 in the 0‐ to 2‐m layer. Sand content and electrical conductivity both played negative roles in maintaining water and carbon in the 6‐ to 15‐m and 0‐ to 15‐m layers at different scales, respectively. This study endeavors to present a novel viewpoint on land use management, with the potential to enhance ecosystem services in water‐limited and land‐degradation regions.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"25 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of the Contemporary Landscape: Relevance of Land Use Management Over Environmental Drivers of Soil Erosion","authors":"M. Lourdes González-Arqueros, J. Arturo Muñiz-Jauregui, Armando Navarrete-Segueda, Erna Martha López-Granados","doi":"10.1002/ldr.5486","DOIUrl":"https://doi.org/10.1002/ldr.5486","url":null,"abstract":"Water erosion is the main soil degradation process in landscapes under human pressure. The assessment of soil losses according to biophysical factors is the key to understanding erosion processes. This study aimed to assess the biophysical and anthropological factors controlling the change in water soil erosion rates under different morphological units as an indicator of geological evolution, topographic variety, and land use. The revised Universal Soil Loss Equation model was employed to estimate the soil erosion rates and evaluate soil loss. The geographic information system was used to present the spatial distribution of soil erosion and its change induced by geological and morphological factors. Nonparametric multidimensional scaling ordinations were applied to evaluate similarities in soil erosion parameters between six geomorphological units. The analysis showed a clear clustering between morphological units, both in terms of absolute soil loss (stress value: 0.15, ANOSIM: <i>R</i> = 0.61, <i>p</i> = 0.001) and in the distribution pattern of erosion rates (stress value: 0.17, ANOSIM: <i>R</i> = 0.74, <i>p</i> = 0.001). Significant differences were observed in erosion rates, which range between 2.5 up to 65.9 t ha⁻¹ yr⁻¹, although 82% of the La Primavera present rates below 15 t ha⁻¹ yr⁻¹. The most eroded unit produces 351 thousand t yr⁻¹, displaying a rate of 23.3 t ha⁻¹ yr⁻¹, while the least eroded unit produces 10 thousand t yr⁻¹, displaying a rate of 2.5 t ha⁻¹ yr⁻¹. This study shows that integrating landscape evolution and morphology into soil erosion research enhances understanding of erosion processes, strengthening the LS Factor. Forest land use is often linked to preventing water erosion, but this study shows it depends on vegetation type; secondary vegetation can have higher erosion rates than conservation agriculture. Soil loss patterns show that each unit combines unique biophysical and human factors, requiring discrete units for systematic erosion analysis.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"65 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of the Ecosystem Transformation in Red Jujube Commercial Forests on the Soil Organic Carbon Sources and Stability in the Lvliang Mountains","authors":"Hui Wang, Chunheng Mu, Jiaqi Li, Lin Sun, Gailing Wang","doi":"10.1002/ldr.5492","DOIUrl":"https://doi.org/10.1002/ldr.5492","url":null,"abstract":"Soil organic carbon (SOC) stabilization is vital for the mitigation of global climate change and retention of soil carbon stocks. The Loess Plateau is a crucial ecological zone in China and even worldwide for major ecosystem protection. However, in the Loess Plateau, there are knowledge gaps about the response of SOC sources and stabilization to different ecological transitions of jujube economic forests. Therefore, our study used clean-cultivated jujube orchards as a control (CK) and selected five main ecosystem transformation models of abandoned jujube orchards on Lvliang Mountain: abandoned farmland (AF), replanted with <i>Astragalus-Bupleurum</i> (AB), replanted with <i>alfalfa</i> (AL), replanted with Chinese pine (CP), and replanted with <i>Chinese arborvitae</i> (PO). The soil properties, sources and physical fractions of organic carbon and their correlations in the 0- to 20-cm soil layer at each sample site were analyzed. The results show that the ecosystem transformation significantly increased the SOC by affecting plant- and microbe-derived carbon and altering its components. Different treatments have varying impacts on the SOC content. The lignin phenol (VSC) content in the soils in the five ecosystem transformation models was greater than that in the CK and had the following ranking: CP &gt; AL &gt; PO &gt; AF &gt; AB (<i>p</i> &lt; 0.05). The ecosystem transformation also significantly increased the soil total amino sugar (TAS) content, microbial residue carbon (MRC), and its contribution to organic carbon. Additionally, it promoted the accumulation of particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) and positively impacted the carbon stability. Among the five ecosystem transformation models, CP had the greatest impact on lignin phenols, amino sugars, SOC content, and stability, whereas AF and AB contributed the least to SOC. The results of this study provide a scientific basis to assess and select optimal transformation modes for the ecosystem transformation of commercial jujube forests.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"115 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multitemporal Analysis of Land Cover Changes in the Rabanal Páramo Ecosystem (Colombia) From 2000 to 2020 and Its Planning Regulations","authors":"Paulina Vergara, Irene De Pellegrin Llorente","doi":"10.1002/ldr.5493","DOIUrl":"https://doi.org/10.1002/ldr.5493","url":null,"abstract":"The páramos, with their high biodiversity and benefits to humanity, are crucial ecosystems in Colombia. Despite their importance, there is a significant knowledge gap regarding the extent of land cover changes and the identification of planning regulatory milestones on these ecosystems. The Rabanal Páramo Regional District, a water supplier for the capital city of Tunja, is under threat. The protected area faces land use conflicts, and updated information needs to be provided on how natural covers have been affected by grazing or the expansion of the agricultural frontier. Considering this, the main goal of this research was to recognize land cover changes in the Rabanal Páramo from 2000 to 2020. To achieve this, we conducted a multi‐temporal analysis using the Corine Land Cover methodology adapted for Colombia. Additionally, we identified the various planning regulations that have contributed to this ecosystem's conservation and restoration efforts. Results showed that the bush cover has significantly decreased, from 27.9% of the total area in 2000 to 20.5% in 2020. In contrast, the mosaic of crops, pastures, and natural spaces has expanded from 2.5% of the total area in 2000 to 8.1% in 2020. The primary strategy in the páramo management plan involves using zoning and land type regulations. Urgent action is needed to balance the demands of agricultural development with the preservation of the páramo ecosystem to ensure a sustainable existence between human activities and the environment.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"40 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining Ecology–Agriculture–Economy Nexus Shifts to Propose Win–Win–Win Pathways for Sustainable Development in Mountainous Areas: Insights From the Greenest City in China","authors":"Ran Wang, Chong Jiang, Yixin Wang, Jie Liu, Ying Zhao, Wenyuan Fu, Xinhua Li, Jie Zhang, Buqing Wang, Yuexin Xiao","doi":"10.1002/ldr.5462","DOIUrl":"https://doi.org/10.1002/ldr.5462","url":null,"abstract":"Ecosystem restoration projects (ERPs) are effective methods for reversing land degradation. However, the dynamic responses of the ecology–agriculture–economy nexus to ERPs and socioeconomic development have yet to be systematically analyzed. To address this issue, we adopted an ERP hotspot as a basis for exploring the evolution regimes of sectoral variables and their determinants. ERPs facilitated vegetation restoration and strengthened carbon sequestration and soil retention, whereas grain productivity declined sharply since 2000 because of industrial and planting structure adjustments. Economic growth was accompanied by marked industrial transformation; the dominant role of the primary industry was gradually replaced by that of other industries, with the population and employment structures changing accordingly. Rural population loss weakened the agricultural production capacity, with the promotion of economic crops further degrading the dominant role of grain crops. Such nexus shifts indicated that positive progress in the ecological and economic sectors should be further optimized to reserve sufficient space for agricultural production and industrial development, instead of relying solely on expanding afforestation areas. Notably, the temporary synergic co‐evolution of nexus sectors from 2008 to 2022 is not stable because of the low grain self‐sufficiency ratio, which might threaten the sustainability of social‐ecological systems. Therefore, agricultural production efficiency must be improved through large‐scale production and improvements in agricultural production conditions to sustain the grain supply. The nexus perspective enriches our understanding of interlinkages among sectors in different phases, facilitating the formulation of coordinated strategies for regional sustainable development.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"32 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143020252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Declining Urban–Rural Population Densities: How Do They Affect Natural Habitat?","authors":"Liyan Yang, Tian Yang, Wanxu Chen, Meng Yang, Qingqing Liu, Guanzheng Wang, Jintao Yuan, Hang Xu, Jie Zeng","doi":"10.1002/ldr.5473","DOIUrl":"https://doi.org/10.1002/ldr.5473","url":null,"abstract":"The decline in urban–rural population density (URPD) has consistently characterized China's rapid urbanization. Analyzing the spatiotemporal trends in URPD and their effects on habitats within the context of China's ecological civilization is crucial. However, quantitative studies on the decline in URPD are lacking, and the impact on natural habitats remains unclear. Therefore, using population census and land‐use data, we analyzed the spatiotemporal trends in URPD and habitat effects in China between 2000 and 2020. The results show that China's urban population density (UPD), rural population density (RPD), and habitat quality have decreased by 11.7%, 40.2%, and 2.1%, respectively, and they all tend to shift to lower values. The effects of UPD and RPD on natural habitats vary and exhibit regional heterogeneity. This study provides insights for promoting high‐quality urban–rural development and advancing ecological civilization.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"84 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143020247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}