Biogeochemistry最新文献

{"title":"Molecular insights into divergent dissolved organic sulfur evolution along two plume pathways under hypoxia in the Yangtze River Estuary","authors":"Huiying Ma,&nbsp;Ruochun Zhang,&nbsp;Zhenwei Yan,&nbsp;Pengfei Li,&nbsp;Yuanbi Yi,&nbsp;Zhao Liang Chen,&nbsp;Si-Liang Li,&nbsp;Ding He","doi":"10.1007/s10533-026-01345-9","DOIUrl":"10.1007/s10533-026-01345-9","url":null,"abstract":"<div><p>Dissolved organic sulfur (DOS) is a crucial yet poorly constrained component linking carbon and sulfur cycles in coastal oceans. To understand how hydrographic dynamics influence its fate, we investigated the chemical evolution of DOS along two distinct plume pathways from the Yangtze River Estuary to the East China Sea: the northward-extending offshore branch (Yangtze River Estuary Northward, YEN) and the southward-confined coastal branch (Yangtze River Estuary Southward, YES). We combined concentration measurements with ultrahigh-resolution mass spectrometry to characterize solid-phase extracted DOS. Results revealed that DOS concentrations decreased seaward but were consistently higher in YEN than in YES. At the molecular level, DOS in the high-salinity zone of YEN exhibited significantly lower aromaticity and higher oxygen-to-carbon ratios compared to YES, indicating divergent photochemical and microbial processing between the pathways. Crucially, in the subsurface hypoxic zone of YEN, we observed a marked increase in both the molecular diversity of dissolved organic matter (DOM) and the relative abundance of sulfonated molecular formulas, providing direct molecular evidence that hypoxia actively facilitates DOM sulfurization. Our results establish that plume trajectory and oxygen availability are key regulators of DOS molecular composition and transformation pathways, offering a mechanistic framework for sulfur-carbon coupling in large river estuaries and marginal seas.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01345-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineral associated organic carbon correlates with soil health in agricultural fields","authors":"Erin D Lane,&nbsp;Kathryn White,&nbsp;Alissa White,&nbsp;Julia Siegel,&nbsp;Heather Darby,&nbsp;Caitlin Hicks Pries","doi":"10.1007/s10533-026-01342-y","DOIUrl":"10.1007/s10533-026-01342-y","url":null,"abstract":"<div><p>Increasing terrestrial carbon storage can reduce atmospheric carbon dioxide levels as a climate mitigation strategy. Agricultural soil offers potential for persistent soil carbon sequestration. Mineral-associated organic carbon (MAOC) is generally more persistent than particulate organic carbon (POC), but it is unclear how much influence soil health and management can have on MAOC relative to climate and edaphic conditions. Soil samples from 196 agricultural fields on 77 farms throughout Vermont were fractionated by size to understand how these factors affect the amount and proportions of POC and MAOC. Our results reveal a significant effect of crop type, climate, soil texture, and aggregate stability on these carbon fractions. Hay and pasture fields had on average 69% more POC and 30% more MAOC than corn and vegetable fields. Both POC and MAOC increased with improved soil health scores suggesting that healthier soils store more carbon in both fractions. MAOC dynamics also varied with soil texture. In clay-rich soils, MAOC increases with mean annual temperature (MAT), particularly in regions with higher mean annual precipitation (MAP). However, this effect is the opposite in soils with lower clay content in which MAOC decreases with higher MAT and MAP. Overall, our findings demonstrate that MAOC can be influenced by management, highlighting how effective soil management strategies aimed at increasing soil health like planting perennials can also enhance long-term carbon sequestration in agricultural soils.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01342-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water table rise sustains carbon release from soils in wetland-dominated landscapes: an intact soil core study","authors":"Katherine Wardinski,&nbsp;Carla López Lloreda,&nbsp;Nicholas Corline,&nbsp;Laura Lehmann,&nbsp;Kelly Peeler,&nbsp;Daniel McLaughlin,&nbsp;Erin Hotchkiss,&nbsp;Kevin A. Ryan,&nbsp;C. Nathan Jones,&nbsp;Brian Strahm,&nbsp;Margaret Palmer,&nbsp;Durelle Scott","doi":"10.1007/s10533-026-01328-w","DOIUrl":"10.1007/s10533-026-01328-w","url":null,"abstract":"<div><p>Wetland-dominated landscapes influence carbon cycling through their potential to act as both carbon sinks and sources. Wetlands in low-relief landscapes have dynamic terrestrial-aquatic interfaces that change seasonally with variable surface water and groundwater levels. However, few studies have directly quantified dissolved organic matter (DOM) release and greenhouse gas (CO₂, CH₄) fluxes from wetland soils along terrestrial-aquatic interfaces as they are seasonally re-saturated by groundwater. To estimate groundwater-mediated soil DOM and gas fluxes, we performed laboratory simulations of vertical groundwater rise on intact soil cores collected from four Delmarva bay wetlands located in the Mid-Atlantic United States. At each wetland, one core was collected from within the wetland basin and the other from the transitional zone at the basin edge. Cores were re-saturated with groundwater over 15 days and then kept fully saturated for an additional 25 days. Source groundwater, soil porewater, and exfiltrated surface water samples were collected and analyzed for pH, ORP, DOM concentration, and DOM optical indices. In both the wetland and transition zone cores, porewater DOM concentrations increased over the wet up and were sustained during prolonged saturation. Optical indices shifted from recently produced, microbial-like signatures towards aromatic, terrestrial-like signatures. Fluxes of CO₂ decreased as the duration of soil saturation increased and soil cores switched from CH₄ sinks to sources upon full soil core saturation. Results indicate that groundwater rise sustains carbon mobilization from soils in wetland-dominated landscapes, emphasizing the need to understand how climate-driven changes to groundwater dynamics may affect carbon fluxes along terrestrial-aquatic interfaces.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01328-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Divergent biogeochemical responses in upland coastal forest soils to repeated flooding and shifts in water chemistry","authors":"Rosmery Cruz-O’Byrne,&nbsp;Ashleigh Montgomery,&nbsp;Angelia Seyfferth,&nbsp;Ben Bond-Lamberty,&nbsp;Jieun Kim,&nbsp;J. Patrick Megonigal,&nbsp;Stephanie C. Pennington,&nbsp;Nicholas D. Ward,&nbsp;Stephanie Wilson,&nbsp;Rodrigo Vargas","doi":"10.1007/s10533-026-01340-0","DOIUrl":"10.1007/s10533-026-01340-0","url":null,"abstract":"<div><p>Sea level rise and storm surges drive hydrologic disturbances that alter biogeochemical processes in upland forests, contributing to forest mortality and ecosystem state change. However, the impact of repeated flooding on belowground biogeochemistry in early stages of this transition is not well understood. We conducted a mesocosm flow-through incubation experiment, applying freshwater (FW) and brackish water (BW) pulses to intact soil monoliths (22 cm depth × 22 cm diameter) from a temperate upland coastal forest to understand how floodwater chemistry influences soil biogeochemistry and organo-mineral interactions. Continuous measurements of CO₂, CH₄, and N₂O fluxes were coupled with δ¹³C-CH₄ analysis, porewater chemistry (DOC, DIC, CDOM, SO₄²⁻, HS⁻, Fe²⁺, Mn²⁺, NH₄⁺, NO₃⁻ + NO₂⁻, Eh, pH), and Fourier-transform infrared spectroscopy (FTIR) of soil organic functional groups. BW treatments produced stronger legacy effects with enhanced reducing conditions, higher CH₄ and N₂O fluxes, and altered soil organic matter. Elevated HS⁻ concentrations and δ¹³C-CH₄ signatures indicated the co-occurrence of sulfate reduction and methanogenesis, likely via the methylotrophic pathway. Accumulation of NH₄⁺ and N₂O suggested dissimilatory nitrate reduction to ammonium, ammonium desorption via cation exchange, and incomplete denitrification. Increases in Fe²⁺, Mn²⁺, and DOC indicated carbon release via destabilization of organo-mineral associations, while FTIR revealed polysaccharide degradation and incorporation of sulfur- and nitrogen-containing groups. DOM optical indices showed smaller, more aromatic degradation products and a shift toward less humified, microbially derived organic matter from disrupted complexes. Our findings underscore the vulnerability of upland coastal forest soils to repeated inundation, with BW intrusion driving water chemistry-dependent feedbacks that destabilize soil carbon and may accelerate ecosystem transition.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01340-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Species-specific chlorine and bromine accumulation in temperate mushrooms: on the possible role of fungi in halogen cycling","authors":"Iva Synková,&nbsp;Anna Žigová,&nbsp;Jan Borovička","doi":"10.1007/s10533-026-01337-9","DOIUrl":"10.1007/s10533-026-01337-9","url":null,"abstract":"<div><p>Chlorine (Cl) and bromine (Br) are important but understudied elements in terrestrial ecosystems, and their accumulation in mushrooms remains poorly characterized. We determined Cl and Br content in 126 mushroom samples collected from a temperate coniferous forest plantation with uniform environmental characteristics. The concentrations of both elements were also determined in a representative soil profile and organic topsoil layers across the studied site. The halogen concentrations in mushrooms ranged from 30 to 35,900 mg Cl kg⁻¹ and 0.18 to 45.9 mg Br kg⁻¹ (dry mass). The accumulation of Cl showed species- and genus-specific patterns, and the Cl concentrations were up to a hundred times higher than those in the topsoil. The concentrations of Br in mushrooms were several orders of magnitude lower than the concentrations of Cl and generally lower than those in the soil layers. Considerable accumulation of both elements was noted in ectomycorrhizal species of the genus <i>Amanita</i>. Multivariate analysis revealed no significant relationship between total Cl and other macroelements except for a weak relationship with potassium. The results provide new insights into halogen accumulation in fungi and indicate a potential role of mushrooms in the biogeochemical cycling of Cl and Br in temperate forest ecosystems.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01337-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Not just a carbon story: uncertainties related to the significance of microbially-produced nitrous oxide during soil carbon sequestration","authors":"Philippe C. Baveye,&nbsp;Ophélie Sauzet,&nbsp;Sarah Smet,&nbsp;Chloé Caurel,&nbsp;Gilles Lemaire,&nbsp;Chan Yu","doi":"10.1007/s10533-026-01330-2","DOIUrl":"10.1007/s10533-026-01330-2","url":null,"abstract":"<div><p>In the last decade, in extensive debates on the potential of soil carbon sequestration to decrease the amount of greenhouse gases (GHGs) emitted by soils, and thereby help mitigate climate change, discussions have centred overwhelmingly on CO₂. Separate research efforts have shown that other greenhouse gases, and in particular N₂O, produced by soil microorganisms, can have a sizeable impact on climate change. At this stage, it is unclear to what extent climate mitigation benefits due to increased soil carbon storage could be offset by N₂O emissions from soils. In the present article, we critically review the relevant primary literature. We conclude that reliable data do not exist at this point to determine whether soil carbon sequestration can help mitigate climate change at all. This is in part because of a lack of recognition in past years of the imperative to measure simultaneously all GHG emissions from soils to cope with their large spatial and temporal heterogeneity, and, also because of ignoring the dynamics of the hydric regime of soils. To resolve this question, a comprehensive, interdisciplinary approach of soil organic matter sequestration is needed, encompassing all the factors that can influence the microbial emission of GHGs.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01330-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148323093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change-related effects on carbon emissions and net ammonification across lowland to upland soils from a high-latitude coastal ecosystem","authors":"Jenna M. Ross,&nbsp;Karen H. Beard,&nbsp;Katharine C. Kelsey,&nbsp;Matteo Petit Bon,&nbsp;A. Joshua Leffler","doi":"10.1007/s10533-026-01336-w","DOIUrl":"10.1007/s10533-026-01336-w","url":null,"abstract":"<div><p>Warming, sea-level rise, and changing herbivory patterns are affecting ecosystem processes in northern coastal soils, including carbon and nitrogen cycling, although their combined effects are poorly understood. We studied the impact of these changes in a full-factorial microcosm experiment using four distinct soil types from the Yukon-Kuskokwim Delta of western Alaska. Soil was collected from three coastal wetlands, which differ in flooding frequency and use by migratory geese, and one rarely-flooded upland tundra used by geese in late summer. Microcosms containing these soils were incubated for 16 weeks at 10 °C or 18 °C, with or without three short-term floods, and with or without goose feces. We measured soil carbon dioxide (CO₂) and methane (CH₄) emissions weekly and net ammonification during the experiment. While higher temperature generally increased CO₂ and CH₄ emissions and net ammonification, and feces addition increased CO₂ emissions, the impact of flooding on both gas fluxes and net ammonification differed among soil types. Flooding suppressed soil CO₂ emissions in the historically least-frequently flooded wetland and upland tundra but had no effect on the other two wetland soils. Conversely, under warmer temperatures, flooding increased CH₄ emissions in the most-frequently flooded wetland but decreased CH₄ emissions in the tundra soil. Flooding also decreased net ammonification in the most-frequently flooded wetland, but increased net ammonification in the tundra soil. Our results suggest that climate change-related effects, particularly flooding, interact with soil-specific conditions that may amplify or dampen carbon loss and net ammonification in coastal Arctic soils depending on landscape position.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01336-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148261888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature sensitivity of labile and stabilised organic carbon decomposition in different land uses","authors":"Tibor Filep,&nbsp;Dóra Zacháry,&nbsp;Marianna Ringer,&nbsp;Attila Domján,&nbsp;Bence Balterer,&nbsp;Ákos Bede-Fazekas,&nbsp;Gergely Jakab,&nbsp;Orsolya Tőke,&nbsp;Zoltán Szalai","doi":"10.1007/s10533-026-01338-8","DOIUrl":"10.1007/s10533-026-01338-8","url":null,"abstract":"<div><p>The temperature sensitivity of the decomposition of organic carbon pools is of key importance for modelling carbon turnover in soils. Therefore, examining the factors that determine and influence temperature sensitivity is extremely important. The decomposition of organic matter taken from three soil fractions in four land use areas (grass, spruce, oak and arable) was investigated in a 1-year incubation at 15, 25 and 35 °C. The particulate organic matter (POM) fraction corresponds to the labile C stock, the sand + aggregate fraction (S + A) to aggregate-stabilized OM, and the silt + clay fraction (s + c) to mineral-associated OM. The rate of organic matter decomposition (k) in the labile fraction significantly exceeded that of the stabilised fractions (S + A and s + c) by 23–167%. However, no significant differences were found in the decomposition temperature sensitivity (Q₁₀) values, which ranged from 2.96 to 3.71. In the cultivated soil, very high Q₁₀ values were detected in the aggregate fraction: 5.38. In contradiction to the kinetic theory, there were no significant differences in Q₁₀ between the labile and stabilised pools. The chemical composition of the organic matter was found to regulate the temperature sensitivity of OM decay: the aryl C, methoxy C and carbonyl C content was positively correlated with Q₁₀, while the C/N ratio and O-alkyl C content proved to be negatively correlated with Q₁₀. The results highlight the vulnerability of the aggregate fraction of cultivated soils, a significant increase in the rate of organic matter decomposition and its temperature sensitivity.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01338-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bidirectional feedbacks between Abies koreana dieback and soil properties slow soil carbon turnover in a subalpine forest","authors":"Hyunshin Koh,&nbsp;Yea-Na Han,&nbsp;Chanoh Park,&nbsp;Min-Seob Kim,&nbsp;Byung-Yong Yu,&nbsp;Gwan-Ho Lee,&nbsp;Hyeyeong Choe,&nbsp;Haegeun Chung,&nbsp;Hyun Seok Kim,&nbsp;Neung-Hwan Oh","doi":"10.1007/s10533-026-01332-0","DOIUrl":"10.1007/s10533-026-01332-0","url":null,"abstract":"<div><p>Tree–soil interactions regulate carbon and nutrient cycling in forest ecosystems, but widespread dieback can disturb these processes with biogeochemical consequences. We investigated how <i>Abies koreana</i> dieback both responds to, and feeds back on, soil properties in subalpine forests on Mt. Jiri, South Korea. Soils were sampled at 0–5, 5–10, and 10–15 cm depths across nine stands, categorized into high- (HM) and low-mortality sites (LM). The HM was characterized by steeper southwestern slopes, lower mineralogical diversity, higher sand content, and nutrient-poor soils, with slightly (but not significantly) lower soil pH. These features suggest intrinsically low nutrient availability and water-holding capacity, likely contributing to <i>Abies koreana</i> stress. However, volumetric soil water content (<i>θ</i>_<i>v</i>) and field capacity did not differ from LM, and trends of relative <i>θ</i>_<i>v</i> after rainfall were also insignificant in HM, suggesting that post-dieback organic matter accumulation may have enhanced water retention. Biogeochemical signatures indicate feedbacks of dieback on soil organic matter (SOM) dynamics: the HM exhibited higher soil C:N, more depleted δ¹⁵N across depths, and older soil organic carbon at 0–5 and 5–10 cm depths, consistent with slowed SOM decomposition. These results suggest reduced rhizosphere activity, suppressed exudation-driven priming, and disturbed litter–soil connectivity. Together, our findings highlight tight, bidirectional linkages between dieback and soil biogeochemistry. Incorporating constraints imposed by both site-specific soil physicochemistry and rhizosphere on SOM turnover will be essential for predicting soil carbon fate under globally increasing subalpine conifer dieback.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01332-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fractionation and environmental assessment of legacy phosphorus from acidic, organic, and calcareous soils","authors":"Md. Anik Mahmud,&nbsp;Xue Bai,&nbsp;Caroline Buchanan Fisher,&nbsp;Shin-Ah Lee,&nbsp;Geisianny Moreira,&nbsp;Abul Rabbany,&nbsp;Elise Morrison,&nbsp;Rebecca Muenich,&nbsp;Luke Gatiboni,&nbsp;Eric S. Mclamore,&nbsp;Juan Claudio Nino,&nbsp;Jonathan Judy,&nbsp;Jehangir H. Bhadha","doi":"10.1007/s10533-026-01335-x","DOIUrl":"10.1007/s10533-026-01335-x","url":null,"abstract":"<div><p>Phosphorus (P) is essential for plant growth, but excessive and continuous application of P fertilizers and animal manure has led to the accumulation of \"legacy phosphorus\" (legacy-P) in soils. While legacy-P presents a potential resource to support future agricultural demands, limited understanding of its chemical forms across different soil types hinders its sustainable management. This study aimed to characterize the chemical nature and storage potential of legacy-P in three contrasting soil types: acidic, organic, and calcareous. Key soil properties—including pH, organic matter, total P, Mehlich-3 P, and concentrations of aluminum (Al), calcium (Ca), iron (Fe), and magnesium (Mg)—were evaluated alongside P fractionation using a modified Hedley method. Furthermore, the soil P saturation ratio (PSR) was calculated to evaluate the relative saturation of soil sorption sites with P. Results showed considerable variability in Mehlich-3 P across soil types, ranging from 7–62% of total P in acidic soils, 1–8% in organic soils, and 3–47% in calcareous soils. Acidic soils were dominated by humic/fulvic-bound P (&gt; 42%), organic soils by recalcitrant residual P (&gt; 62%), and calcareous soils by Ca/Mg-bound P (&gt; 69%), highlighting the influence of soil chemistry on P stability. Despite considerable variation among soil types in P fractionations, PSR results suggested that Ca/Mg-associated minerals play a greater role in retaining legacy P in organic and calcareous soils than Al- and Fe-associated minerals. In acidic soils, both mineral groups contributed similarly to P retention.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01335-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}