Catena最新文献

{"title":"Evaluating coupled influences of slope class and land use change on water quality using single and composite indices in an agricultural basin","authors":"Chaogui Lei","doi":"10.1016/j.catena.2024.108584","DOIUrl":"10.1016/j.catena.2024.108584","url":null,"abstract":"<div><div>Understanding the critical source areas (CSAs) of pollution and their key relationships with land use is essential for efficient water quality improvement. Despite much efforts to examine their influences on water quality, the role of topographic characteristics in land use processes acting on water quality in lowland regions remains unclear. Therefore, taking a typical rural lowland catchment-the Stör catchment (in northern Germany) as the study area, the influences of different land use types with varying slopes on sediment, total phosphorus (TP), and total nitrogen (TN) loads, as well as on the relevant CSAs of a single or combined index (<em>I_j</em>) were determined using an integrated approach that applies hydrologic model SWAT_3s (Soil and Water Assessment Tool, adapted with three groundwater aquifers) and multivariate statistical techniques. The results indicated: (1) sediment and nutrients have markedly declined from 1990 to 1991 over 2009–2011 to 2018–2019, particularly in summer and in comparatively steeper areas with slopes above 5%; (2) the subbasins in the southwest or northeast of the catchment dominated by larger arable fields with slope &gt; 5% and urban areas were identified as CSAs; (3) the spatial heterogeneity of overall water quality was more explained in summer (75% on average) and particularly by croplands (50% on average); (4) water quality indicators were mostly and positively affected by cropland and pasture with relatively steeper slope (&gt;5%). In particular, cropland with slopes &gt; 5% was among those land use indicators producing the highest values of sediment, TP, TN, and <em>I_j</em>. This study demonstrates that the identification of seasonal CSAs could provide insights into the seasonal targeting of conservation practices. Furthermore, communicating model outputs to cause-effect analysis can help formulate slope-adaptability measures for water quality protection.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108584"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757031","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":"Pleistocene pedogenic carbonates from alluvial paleosols in eastern Sudan reveal a semi-arid and seasonal climate, similar to today","authors":"Mosab Mohammednoor ,&nbsp;Faysal Bibi ,&nbsp;Ulrich Struck ,&nbsp;Ali Eisawi ,&nbsp;Robert Bussert","doi":"10.1016/j.catena.2024.108583","DOIUrl":"10.1016/j.catena.2024.108583","url":null,"abstract":"<div><div>Pedogenic carbonates can provide important information regarding paleoclimatic conditions. Compared with East Africa, Pleistocene pedogenic carbonates in Sudan, particularly calcretes, have received very little attention, particularly with regard to local paleoclimatic reconstructions. Pleistocene alluvial sediments aged from ∼230 to &lt;17 ka were deposited along the middle Atbara River in eastern Sudan. Intercalated in these alluvial deposits are paleosols in which different types of pedogenic carbonates occur. Petrographic, mineralogical and isotopic analyses were performed to reconstruct the regional paleoenvironmental conditions. The investigated pedogenic carbonates are appropriate for paleoclimatic reconstruction because they are free of inherited carbonate and diagenetic modification. The paleosols identified in a previous study as Aridisols/Calcisols contain calcrete horizons that consist of an orthic nodular horizon, sometimes overlain by a laminar horizon. Paleosols identified as Vertisols contain slickensides, and disorthic and septaric nodules. The paleosols show stable carbon and oxygen isotope values ranging between −9.12 and −5.12 ‰, and between −7.25 and −4.09 ‰, respectively. Supporting the previous study, the inferred climatic conditions were arid to semi‐arid, with a mixture of C₃ and C₄ vegetation cover, and paleoprecipitation greater than 350 mm/yr, similar to that of the present-day, with likely higher rainfall during the formation of Vertisols than Aridisols/Calcisols. The thickness and morphology of Pleistocene calcretes in eastern Sudan are similar to those in East Africa, suggesting similar climatic conditions during their formation. Well-and weakly-developed calcretes in Aridisols formed in distal and proximal floodplains, respectively, whereas well-developed vertic horizon in Vertisols formed in distal floodplains.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108583"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key factors driving soil diazotrophic community assembly and nitrogenase activity in Qinghai-Tibet alpine meadows","authors":"Qun Wang ,&nbsp;Changting Wang ,&nbsp;Li Lei ,&nbsp;Yiming Jing ,&nbsp;Nan Lan ,&nbsp;Xiangzhen Li ,&nbsp;Jiabao Li","doi":"10.1016/j.catena.2024.108600","DOIUrl":"10.1016/j.catena.2024.108600","url":null,"abstract":"<div><div>Biological nitrogen (N) fixation by soil diazotrophs is the primary source of nitrogen for natural grasslands, especially at high altitudes such as alpine meadow ecosystems. However, the mechanisms shaping the compositions and assembly processes of diazotrophic communities, as well as soil nitrogenase activity in alpine meadows remain poorly understood. In this study, 241 soil samples were collected from alpine meadows on the Qinghai-Tibet Plateau to investigate the distribution patterns and driving factors of diazotrophic communities and nitrogenase activities. Our results showed that soil N fixation potential across all samples ranged from 28.8 to 110 nmol C₂H₄ g^-1h^-¹, and <em>Nitrospirillum</em> and <em>Bradyrhizobium</em> were the most dominant diazotrophic genera. The composition and diversity of soil diazotrophic communities were mainly influenced by soil pH, and to a lesser extent by aridity index and mean annual precipitation. The abundance of <em>nifH</em> gene decreased linearly with soil pH, whereas the ɑ-diversity increased linearly with soil total phosphorus. Null model analysis indicated that deterministic processes governed diazotrophic community assembly, and more acidic soil conditions led to more phylogenetically clustered diazotrophic communities. Partial least squares path modeling and linear regression analyses identified diazotrophic community composition, followed by climatic factors, <em>nifH</em> gene abundance and total phosphorus, as the dominant regulators of soil N fixation potential in alpine meadows. Unexpectedly, soil N fixation potential was not closely related to dominant diazotrophic genera, diversity, or assembly, but highly related to the less abundant diazotrophs. This study provides a novel insight into the ecological mechanisms shaping soil biological nitrogen fixation in alpine meadow ecosystems.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108600"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757555","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":"Source and degradation of soil organic matter in different vegetations along a salinity gradient in the Yellow River Delta wetland","authors":"Xin Ni ,&nbsp;Guangming Zhao ,&nbsp;John R. White ,&nbsp;Peng Yao ,&nbsp;Kehui Xu ,&nbsp;Yadav Sapkota ,&nbsp;Jiancong Liu ,&nbsp;Hao Zheng ,&nbsp;Dapeng Su ,&nbsp;Lei He ,&nbsp;Qiang Liu ,&nbsp;Shixiong Yang ,&nbsp;Hongming Yuan ,&nbsp;Xigui Ding ,&nbsp;Yao Zhang ,&nbsp;Siyuan Ye","doi":"10.1016/j.catena.2024.108603","DOIUrl":"10.1016/j.catena.2024.108603","url":null,"abstract":"<div><div>Salt marsh wetlands exhibit high carbon capture and storage capabilities, which are crucial for mitigating climate change. However, the mechanisms of soil organic carbon (SOC) sequestration in coastal deltaic salt marsh wetlands are not well understood. To bridge this gap, we present new findings on the distribution, sources, and decomposition of SOC in the Yellow River Delta wetland, focusing on four vegetation types along a salinity gradient: <em>Phragmites australis</em>, <em>Tamarix chinensis</em>, <em>Suaeda salsa</em>, and <em>Spartina alterniflora</em>. The input of litter was found to be the primary factor affecting SOC at the depth from 20 to 100 cm, while microbial degradation and clay content were the main factors in the deeper soil layers between 20 and 100 cm. The SOC in all four communities was predominantly derived from recalcitrant organic carbon (81 %–99 %). A Monte Carlo model revealed that terrestrial sources accounted for 61 % of SOC, plant sources for 31 %, and marine sources for 8 %. The vertical distribution of δ¹³C profiles in <em>Phragmites australis</em> and <em>Spartina alterniflora</em> communities was influenced by preferential utilization of ¹²C and substrate, with SOC degradation rate constants of 0.28 and 1.02 per annum (a⁻¹), respectively. The invasion of <em>Spartina alterniflora</em> has led to a significant increase in the easily oxidizable carbon (EOC) to SOC ratio, thus reducing SOC stability, which underscores the importance of mitigating <em>Spartina alterniflora</em> invasion. SOC stability was increased by evaluated salinity in the Yellow River Delta wetland, which was higher than that in Chinese coastal wetlands.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108603"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756960","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":"Assessment and correction of representational bias in phytoliths from modern soil in the Dongting Lake Basin, China","authors":"Lidan Liu","doi":"10.1016/j.catena.2024.108591","DOIUrl":"10.1016/j.catena.2024.108591","url":null,"abstract":"<div><div>Understanding how well topsoil phytoliths represent their aboveground plant communities, and then correcting for any representational bias, is the basis for the accurate phytolith-based reconstruction of past vegetation. We evaluated the representational bias in topsoil phytoliths at 39 sampling sites in forest, shrub, and herb communities in the Dongting Lake Basin, China. We compared the types, concentrations, and percentages of topsoil phytoliths and corresponding plant community phytoliths within the same plant community and quantified the relationships. We observed significant representational biases. Combined with the representation indices of phytoliths, we quantitatively defined the vegetation representativeness of different phytolith types in the topsoil samples. We defined four categories of representation: Associated types, Over-represented types, Under-represented types, and “Special” types. We observed differences in the vegetation representativeness of different topsoil phytolith types, and the same phytolith type also showed significant differences in vegetation representativeness between different plant communities. Additionally, using the preservation index (R-value), we corrected the representational bias of topsoil phytoliths between the different plant communities. After validation, we found that the corrected topsoil phytoliths more accurately represented quantitative changes in the aboveground plant communities. Therefore, the preservation index (R value) is an effective means of correcting the representational bias of topsoil phytoliths, and it can provide the basis for more accurate phytolith-based reconstructions of past vegetation.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108591"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757037","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":"Bulk density and coarse fragment content of the French soil monitoring network for better assessment of changes of soil organic carbon stocks","authors":"José-Luis Munera-Echeverri,&nbsp;Line Boulonne,&nbsp;Dominique Arrouays,&nbsp;Nicolas Saby,&nbsp;Nicolas Soler-Dominguez,&nbsp;Céline Ratié,&nbsp;Claudy Jolivet,&nbsp;Manuel P. Martin","doi":"10.1016/j.catena.2024.108609","DOIUrl":"10.1016/j.catena.2024.108609","url":null,"abstract":"<div><div>Bulk density (BD) and coarse fragments (CF) are often missing in soil monitoring networks. In the French Soil Quality Monitoring Network BD and CF have been measured in two campaigns in sites distributed in a grid over mainland France. The objective of this work is to evaluate i) how BD and CF have changed, ii) how volumetric methods and land use affect the observed trends, and iii) to simulate the impact of BD and CF changes on the estimations of changes of soil organic carbon stocks (SOCS). The results showed no significant change of (Δ) CF between campaigns in either the topsoil or subsoil, while there was a significant decrease of BD only in the topsoil (−3.1 ± 0.9 %). When methods were constant in both campaigns, BD decreased in croplands and grasslands topsoil and it did not change in forests. We could explain a rather low part of the ΔBD variance (R² = 0.21), mostly linked to the within-site variability of CF and to changes in some methodological aspects between campaigns. We simulated changes in topsoil SOCS, assuming SOC content constant over time; we found negative estimates that were the largest in soils with low CF content (−0.2 ± 0.06 % yr⁻¹ an^-1) as well as differences between using site-specific average CF values over both campaigns and using site-specific values of each campaign [-0.17 ± 0.04 % yr⁻¹ vs −0.05 ± 0.06 % yr⁻¹, respectively]. These differences were caused by rocky soils, and were not significant when using only sites with low CF content. Our work highlights some limitations in assessing BD changes using broad-scale soil monitoring networks. These findings have important consequences on the methods used to assess changes in SOCS and their uncertainties at broad-scale. They are timely and relevant given the current proposals to implement soil health monitoring at national, continental and global scale.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108609"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in accumulation of land-based organic matter under recent climate change and anthropogenic impact: A tropical coastal perspective","authors":"Ming Liu ,&nbsp;Yazhi Bai ,&nbsp;Li Jiang ,&nbsp;Limin Hu ,&nbsp;Bin Wu ,&nbsp;Shuqing Qiao ,&nbsp;Weini Chong ,&nbsp;Narumol Kornkanitnan ,&nbsp;Somkiat Khokiattiwong ,&nbsp;Xuefa Shi","doi":"10.1016/j.catena.2024.108611","DOIUrl":"10.1016/j.catena.2024.108611","url":null,"abstract":"<div><div>Tropical continental shelves play an important role in the global carbon cycle especially in the context of increased anthropogenic interference and climate change. However, the long-term fate and response of sedimentary organic carbon (OC) in these regions remain poorly understood. In this study, we analyzed bulk OC and molecular biomarkers in a sediment core collected from the lower Gulf of Thailand, and compiled with several published records of sedimentary organic matter (OM) from other tropical Asian margins. Our results reveal a dramatic ∼ 40 % increase in terrestrial OC inputs since the 1980s, likely driven by the effects of accelerated coastal erosion from rising sea levels and the degradation of mangrove ecosystems. In addition, shifts in regional human activities, including changes in energy consumption patterns, have altered the sources of pyrogenic OM, contributing to the observed spatial and temporal variability of anthropogenic OM across tropical coastal margins. Molecular fingerprints highlight recent changes in the accumulation of land-based OM, showing an increased presence of erosion-derived and degraded OC, along with pyrogenic OM. This shift is linked to the combined effects of coastal retreat and basin-wide emissions, influenced by both natural climate forces and anthropogenic activities.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108611"},"PeriodicalIF":5.4,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757161","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":"Late holocene vegetation succession and climate change in the Central Plains of China: Evidence from a high-resolution pollen record","authors":"Peng Chen ,&nbsp;Xuewen Zhou ,&nbsp;Liran Hu ,&nbsp;Chang Liu ,&nbsp;Zhengchuang Hui","doi":"10.1016/j.catena.2024.108589","DOIUrl":"10.1016/j.catena.2024.108589","url":null,"abstract":"<div><div>Changes in the East Asian summer monsoon precipitation will have a significant impact on China’s politics, economy, and social development. To explore the controls and drivers of the Late Holocene (∼3350–2560 cal. yr. BP) vegetation succession and East Asian summer monsoon precipitation changes in the Central Plains of China, we conducted pollen analysis of the Pu Tian core collected from Zhengzhou, China. The results showed three periods of vegetation and East Asian summer monsoon variation: coniferous and broad-leaved mixed forest between ∼3350–3025 cal. yr. BP, increasing forest vegetation dominated by broadleaf <em>Betula</em> between ∼3025–2930 cal. yr. BP, decreasing forest vegetation and increasing herbaceous plants dominated by <em>Artemisia</em> and Poaceae between ∼2930–2560 cal. yr. BP. Weighted Averaging Partial Least Squares Regression was used to quantitatively reconstruct the average annual precipitation variation in the Central Plains of China. Our precipitation reconstruction and its comparison to other reconstructions and forcing show that it was influenced by internal (intertropical convergence zone and El Niño-Southern Oscillation) and external (Northern Hemisphere Summer Insolation) forcing. Specifically, average annual precipitation decreased significantly between ∼2980–2680 cal. yr. BP, and tree pollen (such as <em>Betula</em>) also decreased significantly during this period, possibly related to the “2.8 ka” event (a weak monsoon event in the Holocene). Our comparison of the published climate and environmental records of the East Asian monsoon region suggests that the 2.8 ka event exhibiting a “W” structure of “dry-wet-dry” and may have been caused by the weakening of solar activity, which affected the climate of the East Asian monsoon region through oceanic and terrestrial atmospheric circulation such as El Niño-Southern Oscillation.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108589"},"PeriodicalIF":5.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757034","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":"Spatiotemporal variations and driving factors of buried organic carbon in mangrove sediments of China: Based on δ13C values","authors":"Bingshuai Liu ,&nbsp;Peng Xia ,&nbsp;Yao Zhang ,&nbsp;Jun Du ,&nbsp;Xianen Luo","doi":"10.1016/j.catena.2024.108571","DOIUrl":"10.1016/j.catena.2024.108571","url":null,"abstract":"<div><div>Mangroves, as significant coastal carbon reservoirs, play a pivotal role in the global carbon cycle. However, the detailed data on mangrove organic carbon (OC) burial is patchy in China, owing to regional discrepancies in spatiotemporal variations and driving factors. To fill this gap, the end-member mixing models based on δ¹³C and C/N values were used to calculate the relative contributions of terrestrial, mangrove, and marine OC, based on 28 sediment cores collected from five typical mangroves in China. The organic carbon burial flux (OCBF) and stocks (OCS) were calculated to be 133.93 ± 106.56 (<em>n</em> = 28) g C m⁻² yr⁻¹ and 126.91 ± 52.45 (<em>n</em> = 28) Mg C ha⁻¹, respectively, which were lower than the global averages. The study indicated that there were no significant latitudinal variations in mangrove OCS. The reason was that these sampling sites in high latitudes were mostly located at estuaries, exhibiting relatively higher sedimentation rates. The increase in terrestrial OC derived from river inputs effectively offset the decline in mangrove productivity. Therefore, sedimentation rates should be the main driving factor for spatiotemporal variations of mangrove OC burial in China.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108571"},"PeriodicalIF":5.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757036","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":"Bacterial and fungal diversity, community composition, functional groups, and co-occurrence network succession in dryland and paddy soils along a 3000-year chronosequence","authors":"He Jiao ,&nbsp;Mingxu Xu ,&nbsp;Jiachen Ji ,&nbsp;Yonghong Wang ,&nbsp;Yalu Zhang ,&nbsp;Baowei Su ,&nbsp;Huan Zhang ,&nbsp;Chao Gao","doi":"10.1016/j.catena.2024.108582","DOIUrl":"10.1016/j.catena.2024.108582","url":null,"abstract":"<div><div>There is a limited understanding of soil microbial community successional trajectories during dryland and paddy soil long-term management after wetland reclamation. We examined the effects of long-term reclamation on the microbial diversity, community composition, functional groups, and co-occurrence network in dryland and paddy soils using a 3000-year soil chronosequence established in the floodplain of the middle and lower Yangtze River, employing the “space-for-time” method and 16S rRNA and ITS amplicon sequencing. Over time, reclaimed land experienced varying losses in microbial richness and diversity, with paddy soils exhibiting higher alpha diversity than drylands due to greater resources and ecological niches. Proteobacteria dominated drylands, Chloroflexi prevailed in paddy soils, and fungal communities in both land-use types were primarily Ascomycota and Basidiomycota. Functional predictions showed higher chemoheterotrophy and aerobic_chemoheterotrophy in dryland soils and more animal_parasites_or_symbionts and dung_saprotrophs in paddy soils. During the 2000–3000 year reclamation, the abundance of pathogens increased, posing risks to agricultural production. Co-occurrence network analysis indicated that, compared to paddy soils, dryland soils may form a more complex and stable microbial cooperative network. Soil organic carbon and pH influenced microbial communities in drylands, while bulk density and cation exchange capacity were crucial in paddy soils. Partial least squares path modeling indicated that reclamation duration impacts microbial network complexity and diversity, with soil properties regulating paddy soil microbial networks. These findings broaden our understanding of microbial community succession in dryland and paddy soils after long-term wetland reclamation, supporting soil health and sustainable agriculture.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"248 ","pages":"Article 108582"},"PeriodicalIF":5.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756959","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}