IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.catena.2026.109892

Ji Wu , Guang Yang , Chenguang Wang , Yunxia Ma , Zimeng Wang , Naijing Lu , Xueying Han

{"title":"Effect of vegetation restoration on soil infiltration at gully heads in the loess plateau Pisha sandstone region","authors":"Ji Wu , Guang Yang , Chenguang Wang , Yunxia Ma , Zimeng Wang , Naijing Lu , Xueying Han","doi":"10.1016/j.catena.2026.109892","DOIUrl":"10.1016/j.catena.2026.109892","url":null,"abstract":"<div><div>Soil infiltration is of great significance for assessing the potential and stability of vegetation restoration in arid and semi-arid regions. However, the mechanisms by which different types of vegetation influence soil infiltration at gully heads in Pisha sandstone region remain unclear. Therefore, the study focuses on the typical small watershed of Getuodian in the Pisha sandstone region of the loess plateau. It measures the soil stable infiltration rate (SIR) and soil properties at gully heads under five vegetation types<em>—Pinus tabuliformis</em> (PT) and <em>Prunus sibirica</em> (PS) artificial arbour forest, <em>Hippophae rhamnoides</em> (HR) and <em>Caragana korshinskii</em> (CKS) artificial shrubland forest, and natural grassland (NG)<em>—</em>Based on the in-situ double-ring infiltration method and laboratory analysis. The SIR consistently follows the trend: Arbor forest > shrub forest > natural grassland. Among the arbor plots, the stable infiltration rate of PT is higher, at 2.81 mm min<sup>−1</sup>, whereas in the shrub plots, the CKS is higher, at 1.48 mm min<sup>−1</sup>. The soil organic carbon (SOC), the ratio of macroaggregates with particle size greater than 0.25 mm (R), aggregate stability (as measured by the mean weight diameter (MWD) and geometric mean diameter (GMD)), and clay had the strongest effect on the SIR. The five factors in total contributed 87.45% to the SIR, which was significantly higher than that of individual factors. The SOC indirectly influences the SIR by promoting the formation of macroaggregates, enhancing aggregate stability, and subsequently improving clay content. Moreover, the empirical model established based on the relationships between these factors and the SIR was able to accurately estimate the SIR (R<sup>2</sup> = 0.982). The findings provide a valuable reference for assessing hydrological processes in the loess plateau.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109892"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171040","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

Vegetation productivity and soil CO₂ correlation were decoupled during post-wildfire recovery in karst landscapes 喀斯特地貌植被生产力与土壤CO 2相关性在野火后恢复过程中呈解耦关系

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-13 DOI: 10.1016/j.catena.2026.109903

Xuyang Liu , Sibo Zeng , Yan Yang , Yueer Tang , Chenpeng Hu , Xinhe Huang , Pujia Yu

{"title":"Vegetation productivity and soil CO₂ correlation were decoupled during post-wildfire recovery in karst landscapes","authors":"Xuyang Liu , Sibo Zeng , Yan Yang , Yueer Tang , Chenpeng Hu , Xinhe Huang , Pujia Yu","doi":"10.1016/j.catena.2026.109903","DOIUrl":"10.1016/j.catena.2026.109903","url":null,"abstract":"<div><div>In recent years, extreme high temperatures, droughts, and frequent wildfires triggered by global warming have significantly affected terrestrial ecosystems and their carbon cycle processes, exhibiting complex patterns especially in karst areas with widespread carbonate rocks. This study analyzed a burned karst landscape to examine the coupling between aboveground vegetation recovery and subsurface carbon processes after wildfire. Using burned and unburned area comparisons and multi-source data, we found a pronounced decoupling between surface recovery and deep carbon dynamics. Surface vegetation cover (Enhanced Vegetation Index, EVI) and gross primary production (GPP) recovered rapidly under non-drought conditions (EVI rose from near zero to about 0.6 within a year; GPP increased from near zero to about 5 g C/m<sup>2</sup>/day), driven mainly by shallow-rooted grasses and shrubs, while deep-rooted woody plant regeneration lagged markedly. This asynchrony produced an inverted vertical profile of soil <em>p</em>CO₂: shallow soil at 20 cm showed sustained increases (14,940 ± 8115.9 μmol/mol; mean ± standard deviation) relative to the unburned area (10,989.9 ± 7977.6 μmol/mol), whereas deep soil at 30 cm remained depressed with limited fluctuations (5154 ± 3164.6 μmol/mol) and was significantly lower than the unburned deep soil (13,026.8 ± 8909.8 μmol/mol). Persistent low deep-soil <em>p</em>CO₂ could reduce carbonate dissolution, potentially weakening karst weathering sinks over the long term. Consequently, assessing post-fire carbon balance based solely on surface indicators would overestimate regional sequestration potential. Restoration should prioritize deep-rooted woody vegetation to reestablish canopy-to-bedrock carbon transport and enhance system resilience and carbon sequestration.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109903"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171106","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

Failure modes of basal-ice moraine slopes under combined hydrothermal conditions: laboratory evidence 复合热液条件下基底-冰碛坡的破坏模式：实验室证据

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-11 DOI: 10.1016/j.catena.2026.109906

Jingxuan Cao , Jiao Wang , Peng Cui , Zhenxing Liu , Can Yang , Hao Wang , Tao Shu

{"title":"Failure modes of basal-ice moraine slopes under combined hydrothermal conditions: laboratory evidence","authors":"Jingxuan Cao , Jiao Wang , Peng Cui , Zhenxing Liu , Can Yang , Hao Wang , Tao Shu","doi":"10.1016/j.catena.2026.109906","DOIUrl":"10.1016/j.catena.2026.109906","url":null,"abstract":"<div><div>The stability of basal-ice moraine slopes (BIMS) is increasingly threatened by climate warming, posing a significant geohazard in high-altitude regions. The degradation of buried basal ice, coupled with intense rainfall, induces complex thermo–hydro–mechanical (THM) interactions, yet the specific failure mechanisms remain insufficiently understood. This study provides direct experimental evidence using instrumented laboratory flume experiments to investigate the failure characteristics of BIMS under controlled thermal and rainfall conditions. By systematically analyzing volumetric water content, soil pressure, pore water pressure and deformation, we clarify the regulatory role of the ice–soil interface in slope instability. Results demonstrate this interface is the primary control, governing heat transfer and meltwater redistribution. We identify two distinct failure pathways: temperature-driven instability is progressive, evolving from initial slope-toe failure to large-scale misaligned sliding, where rising temperatures accelerate meltwater accumulation. In stark contrast, rainfall-induced instability is abrupt, characterized by rapid slope disintegration and surface flow-slips, with intense rainfall showing the potential to trigger debris flows. These findings elucidate the coupled THM failure mechanisms of BIMS, providing a robust scientific basis for process-based hazard assessment and risk mitigation in cold-region mountainous environments.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109906"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171191","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

Relationships between submerged plant productivity and organic carbon burial across Tibetan Plateau lakes during the Holocene 全新世青藏高原湖泊淹没植物生产力与有机碳埋藏的关系

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-01-31 DOI: 10.1016/j.catena.2026.109880

Hu Liu , Huanye Wang , Xiangzhong Li , Zhoufeng Wang , Zheng Wang , Liangcheng Tan , Jiawei Jiang , Kaili Yang , Zhonghui Liu , Weiguo Liu

{"title":"Relationships between submerged plant productivity and organic carbon burial across Tibetan Plateau lakes during the Holocene","authors":"Hu Liu , Huanye Wang , Xiangzhong Li , Zhoufeng Wang , Zheng Wang , Liangcheng Tan , Jiawei Jiang , Kaili Yang , Zhonghui Liu , Weiguo Liu","doi":"10.1016/j.catena.2026.109880","DOIUrl":"10.1016/j.catena.2026.109880","url":null,"abstract":"<div><div>Aquatic submerged plants represent a crucial component of lake ecosystems, yet their influence on lacustrine organic carbon burial remains poorly quantified, particularly regarding historical variations in submerged plant productivity‑carbon burial relationships across different lake types. This study combines new total organic carbon (TOC) δ<sup>13</sup>C data from Lake Sugan (a less-studied site on the northern Tibetan Plateau) and integrate these data with a comprehensive synthesis of published Holocene records, including: 22 lake cores (TOC δ<sup>13</sup>C and content), 7 soil profiles (TOC δ<sup>13</sup>C), 4 lake cores (C<sub>31</sub> <em>n</em>-alkane δ<sup>13</sup>C), and modern plant samples across the Tibetan Plateau. Our integrated analysis reveals: (1) TOC δ<sup>13</sup>C of soil profiles (−27‰ to −23‰) and C<sub>31</sub> <em>n</em>-alkane δ<sup>13</sup>C of sediments (−33‰ to −29‰) consistently indicate C<sub>3</sub> plants dominance throughout the Holocene; (2) significantly enriched TOC δ<sup>13</sup>C in lake core sediments relative to C<sub>3</sub> plants and soil profiles demonstrates substantial contributions from submerged plants, serving as a robust proxy for submerged plant productivity; and (3) distinct regional patterns emerge, with submerged plant productivity (controlled by water depth and terrestrial vegetation cover) driving organic carbon burial in northeastern and southwestern lakes, while terrestrial biomass dominates in southeastern lakes with minimal submerged plant input. These findings provide new insights into the complex interplay between aquatic and terrestrial carbon sources in high-altitude lake systems, highlighting the need for region-specific assessments of carbon burial mechanisms.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109880"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171323","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

Topography modifies the effect of mycorrhizal type on soil carbon accumulation in a subtropical mountainous forest 地形改变了亚热带山地森林菌根类型对土壤碳积累的影响

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.catena.2026.109828

Qiuxiang Tian , Mengzhen Lu , Xiaoxiang Zhao , Zhiyang Feng , Xiujuan Qiao , Mingxi Jiang , Feng Liu

{"title":"Topography modifies the effect of mycorrhizal type on soil carbon accumulation in a subtropical mountainous forest","authors":"Qiuxiang Tian , Mengzhen Lu , Xiaoxiang Zhao , Zhiyang Feng , Xiujuan Qiao , Mingxi Jiang , Feng Liu","doi":"10.1016/j.catena.2026.109828","DOIUrl":"10.1016/j.catena.2026.109828","url":null,"abstract":"<div><div>Arbuscular mycorrhizal (AM) and ectomycorrhizal (EcM) fungi and their associated trees employ contrasting nutrient acquisition strategies, strongly impacting soil carbon cycling. However, little is known about how these impacts vary with topography in subtropical forests characterized by complex terrain where both AM and EcM trees co-occur. Here, we analyzed 972 soil samples from a 25-ha fully mapped subtropical forest plot to investigate the effects of mycorrhizal type and topography on soil carbon accumulation. Results reveal that the upper slope position harbors a higher abundance of EcM tree species. Both upper slope position and EcM tree dominance (percentage of the total basal area of ECM trees vs. all trees) positively affected aboveground biomass, forest floor thickness, and soil acidification, leading to higher soil carbon concentration and C:N ratio. Slope degree had minimal effect on AM/EcM tree distribution, but could strongly regulate the effects of tree mycorrhizal type on soil carbon concentration. The positive relationship between EcM tree dominance and soil carbon concentration was observed only on gentle slopes, but was negligible on steep slopes. Therefore, soil carbon accumulation in this subtropical forest are shaped by the combined effects of topography and tree mycorrhizal types. Our findings emphasize the importance of topography in regulating AM/EcM tree distribution and their impacts on soil carbon processes. Topographic attributes should be accounted for in future studies on mycorrhizal control over soil carbon and nutrient cycling.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109828"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015799","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

Rainfall patterns and catchment characteristics interactively regulate nitrogen and phosphorus dynamics in agricultural ponds 降雨模式和流域特征相互作用调节农业池塘氮磷动态

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-02 DOI: 10.1016/j.catena.2026.109895

Hengbin Xiao , Yaping Chen , Tianzi Hu , Ronggui Hu

{"title":"Rainfall patterns and catchment characteristics interactively regulate nitrogen and phosphorus dynamics in agricultural ponds","authors":"Hengbin Xiao , Yaping Chen , Tianzi Hu , Ronggui Hu","doi":"10.1016/j.catena.2026.109895","DOIUrl":"10.1016/j.catena.2026.109895","url":null,"abstract":"<div><div>Nutrient transport from agricultural catchments to surface waters during rainfall events threatens water quality. However, it remains poorly understood how rainfall patterns (i.e., amount, intensity, duration, and interval) will interact with catchment characteristics (i.e., soil nutrients, slope, landscape patterns, and pond morphology) to regulate nitrogen (N) and phosphorus (P) dynamics in agricultural ponds. This study investigated the effects of rainfall events on temporal variations in N and P concentrations in ponds located in citrus-dominated catchments. During the monitoring period, nitrate (NO₃<sup>−</sup>-N) and dissolved P (DP) constituted the dominant fractions of total N (TN) and total P (TP) concentrations, respectively. Rainfall events led to an increase in nutrient concentrations, with particulate N (PN) and P (PP) concentrations showing greater increases (22–164%) compared to their dissolved counterparts. Rainfall amount and intensity emerged as the primary drivers of increased nutrient concentrations. Rainfall duration exhibited a positive association with changes in particulate nutrient levels, whereas rainfall interval had minimal influence. Multivariate analysis indicated that rainfall patterns and pond morphology together accounted for 65% of the observed variability in nutrient concentrations. Variations in water depth, catchment slope, and soil nutrients significantly contributed to increases in N and P concentrations. P dynamics were more strongly influenced by landscape patterns than N, particularly through largest patch index (LPI) and shannon's diversity index (SHDI). These results highlight the need for integrated strategies to mitigate non-point source pollution in intensively cultivated agricultural catchments. The study emphasizes the critical role of both hydrological processes and catchment characteristics in managing agricultural water quality.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109895"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171042","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

Scale-invariant property of the total source basin area 总烃源盆地面积的尺度不变性

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-14 DOI: 10.1016/j.catena.2026.109919

Joo-Cheol Kim , Chang-Lae Jang

{"title":"Scale-invariant property of the total source basin area","authors":"Joo-Cheol Kim , Chang-Lae Jang","doi":"10.1016/j.catena.2026.109919","DOIUrl":"10.1016/j.catena.2026.109919","url":null,"abstract":"<div><div>Understanding the organization of channel networks requires indicators that remain consistent across observational scales. This study examines the scale-invariant property of the total source basin area, formulated as the product of the number of sources and the mean area of source basin. Using the digital elevation model of the Seolma Creek experimental basin in Korea, we generate 889 realizations of channel networks under varying threshold areas and apply the Bai-Perron procedure with the Chow test to detect structural breaks. The results reveal that distinct scaling regimes emerge, corresponding to ephemeral and perennial channel networks, with breakpoints in the number of sources marking the transitions. While the number of sources is highly sensitive to variations in threshold area, the mean area of source basin remains relatively stable, and their compensatory interaction produces the observed invariance of the total source basin area. Notably, ephemeral channel networks retain a constant portion of drainage area as the total source basin area despite seasonal or event-driven variability, whereas perennial networks deviate from this balance. These findings provide an explicit mechanistic rationale for the invariant properties of source basins previously reported in the literature and establish the total source basin area as a robust geomorphologic indicator for analyzing the dynamic behavior of fluvial systems. The approach also offers a framework to evaluate the influence of external forcing such as climate variability on river basin structure.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109919"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171105","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

Predicting earthworm biogeography and climate-driven shifts on China's Loess Plateau 黄土高原蚯蚓生物地理与气候变化预测

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-06 DOI: 10.1016/j.catena.2026.109904

Zhiyong Li , Baojiang Guo , Tongchuan Li , Ming'an Shao

{"title":"Predicting earthworm biogeography and climate-driven shifts on China's Loess Plateau","authors":"Zhiyong Li , Baojiang Guo , Tongchuan Li , Ming'an Shao","doi":"10.1016/j.catena.2026.109904","DOIUrl":"10.1016/j.catena.2026.109904","url":null,"abstract":"<div><div>Earthworms are essential for soil health and ecosystem functions, yet their distribution and underlying mechanisms in arid and semiarid regions remain poorly understood. Here, we conducted a systematic field survey of 600 plots across 59 sites and employed a random forest model to map the earthworm distribution on the Loess Plateau and quantify potential changes under future climate scenarios. The resulting maps indicate that the total abundance and biomass of earthworms on the Loess Plateau are approximately 5.52 × 10<sup>12</sup> individuals and 1.88 × 10<sup>13</sup> g, respectively. Regionally, the earthworm distribution decreases from southeast to northwest, driven by climate, whereas locally, soil, topography, and vegetation differences contribute to spatial heterogeneity. Under future climate scenarios, earthworm abundance is projected to increase by 44–61%, and earthworm biomass is projected to increase by 77–96% by the 2090s. Our results highlight the widespread distribution of earthworms in arid and semiarid regions and their potential expansion under global climate change, particularly in ecologically fragile areas.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109904"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170606","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

From climate-driven to dam-regulated: Impacts of dams on riparian vegetation in a mountainous river system 从气候驱动到水坝调节：山区河流系统中水坝对河岸植被的影响

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-01 DOI: 10.1016/j.catena.2026.109879

Nan Wang , Zhen Xu , Yingjun Xu , Yacun Yang , Nan Cong , Weiwei Yao

{"title":"From climate-driven to dam-regulated: Impacts of dams on riparian vegetation in a mountainous river system","authors":"Nan Wang , Zhen Xu , Yingjun Xu , Yacun Yang , Nan Cong , Weiwei Yao","doi":"10.1016/j.catena.2026.109879","DOIUrl":"10.1016/j.catena.2026.109879","url":null,"abstract":"<div><div>Dams profoundly influence riparian ecosystems, yet their ecological consequences and spatial heterogeneity in mountainous environments remain poorly quantified. Focusing on China's Lower Jinsha River Basin, we analyzed vegetation responses to cascade dams by integrating long-term Normalized Difference Vegetation Index (NDVI) time series with climatic and hydrological datasets from 2000 to 2019. We employed a multi-method analytical framework to quantitatively disentangle the relative contributions of dam operations and climatic variability, delineate their direct and indirect pathways, and assess vegetation heterogeneity across key environmental gradients. Results indicate that post-dam NDVI trends nearly doubled (up to 0.0092 yr<sup>−1</sup>), with the strongest greening in winter. A pre−/post-impoundment shift associated with dam operation accounted for 73.7% of the explained NDVI variance, substantially outweighing the contribution of climatic variability. NDVI dynamics thus transitioned from a climate-driven regime to one increasingly shaped by dam-associated hydrologic stabilization and indirect microclimatic effects, including increased precipitation, warmer winters, and reduced summer-autumn heat stress. These changes exhibited strong spatial heterogeneity. Significant NDVI increases and reduced variability were most evident at mid-to-high elevations within ∼80 km upstream of dams, whereas NDVI declines and increased variability were concentrated in low-elevation zones (< 500 m). Forests exhibited the most coherent NDVI increases, expressed through both steeper upward slopes and reversals from declining to increasing trends, while croplands and grasslands displayed more divergent responses, with a higher proportion of declining trends compared to forests. These findings emphasize the need to incorporate ecological feedbacks and spatial heterogeneity into dam planning to optimize riparian vegetation management under regulated flows.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109879"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170578","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

Recovery of aboveground biomass and plant species richness with the decline in N deposition depends on pH and SOM effects on P and N availability 随着N沉降的减少，地上生物量和植物物种丰富度的恢复取决于pH和SOM对P和N有效性的影响

IF 5.7 1区农林科学

Catena Pub Date : 2026-04-01 Epub Date: 2026-02-05 DOI: 10.1016/j.catena.2026.109868

Annemieke Kooijman , Erik Noordijk , Mark van Til

{"title":"Recovery of aboveground biomass and plant species richness with the decline in N deposition depends on pH and SOM effects on P and N availability","authors":"Annemieke Kooijman , Erik Noordijk , Mark van Til","doi":"10.1016/j.catena.2026.109868","DOIUrl":"10.1016/j.catena.2026.109868","url":null,"abstract":"<div><div>The response to declining atmospheric N deposition between 1992 and 2021 was studied in ungrazed coastal dune grasslands representative for NW Europe, in a synthesis of 11 separate studies. With the decline from 25 to 15 kg N ha<sup>−1</sup> year<sup>−1</sup>, average aboveground biomass decreased from 450 to 150 g m<sup>−2</sup>, while plant species richness increased from 7 to 14, albeit only in tallgrass vegetation. Apart from N deposition, soil and landscape factors such as pH and SOM were important drivers. Low biomass levels could be reached at high pH and/or low SOM, but not at low pH and high SOM. The vegetation was N-limited at low SOM, and higher aboveground biomass with high SOM could be explained by higher N mineralization. Decrease in biomass with pH was associated with shifts in P-availability and plant strategies for nutrient uptake. At high pH, insoluble calcium phosphate was the major source of P, which favours arbuscular mycorrhizal (AM) plants. Plant species richness increased, but aboveground biomass decreased, probably due to high costs to the fungal partner. However, even at high pH, the vegetation was not P-limited, which may explain its sensitivity to high N deposition. At low pH, organic and sorbed P predominated, which favour nonmycorrhizal plants. Aboveground biomass increased at low pH with higher P availability and higher plant N use efficiency. This study provides strong evidence that lower N deposition indeed helps recovery of vegetation, but also stresses the importance of pH and SOM as key controls for nature management.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"265 ","pages":"Article 109868"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170587","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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