Biogeochemistry最新文献

{"title":"Investigating the persistence of iron-bound phosphorus in lake sediment under sulfidic conditions","authors":"Harm van Kuppevelt,&nbsp;Michael Hupfer,&nbsp;Kasper Reitzel,&nbsp;Marta Lidia Sudo,&nbsp;Ugo Marzocchi","doi":"10.1007/s10533-026-01375-3","DOIUrl":"10.1007/s10533-026-01375-3","url":null,"abstract":"<div><p>Iron (Fe) additions are widely used to suppress internal phosphorus (P) loading in eutrophic lakes by promoting the formation of vivianite (Fe(II)₃(PO₄)₂·8H₂O), a redox-stable Fe–P mineral that can sequester P in anoxic sediments over the long term. However, vivianite is unstable under sulfidic conditions, but the remobilization potential of P is unclear. In a 96-day mesocosm experiment, we examined how sulfate availability affects Fe-bound P persistence in a controlled model system of Fe-amended lake sediment. Sediment amended with Fe-P and enriched with vivianite during an anoxic pre-incubation was subsequently incubated under oxic overlying water at either low (&lt;100 µmol L^-1) or high (~1 mmol L^-1) sulfate concentrations. Porewater profiles measured with microsensors and diffusive gradients in thin films (DGT), combined with solid-phase analyses by sequential extraction, scanning electron microscopy coupled to energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD), revealed that vivianite persisted in sediment under oxic water conditions but was progressively destabilized as sulfide accumulated through microbial sulfate reduction. Sulfide drove coupled dissolution–reprecipitation reactions that transformed vivianite-bound Fe into amorphous Fe sulfides and pyrite. As a result, total sediment P-binding capacity declined. Although a portion of released P was re-adsorbed onto freshly precipitated Fe(III) phases in the oxic surface layer, this only partially compensated for the net loss of P-binding capacity, and total solid-phase P declined in both treatments. These findings highlight that P retention is linked to sulfide availability, and that monitoring porewater sulfide concentrations may serve as a practical early warning indicator of declining P retention capacity.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01375-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986711","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":"Biogeochemical reactions in anaerobic digesters for biogas production yield enhanced ammonia emissions","authors":"Viney P. Aneja,Srijan Sengupta,Swarnali Sanyal,William H. Schlesinger","doi":"10.1007/s10533-026-01372-6","DOIUrl":"https://doi.org/10.1007/s10533-026-01372-6","url":null,"abstract":"","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"227 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149021826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaf elemental traits and stable isotopes across a Caatinga–Atlantic forest transect reveal shifts in water-use and nutrient strategies","authors":"Ana Dolores Santiago de Freitas,Everardo Valadares de Sá Barretto Sampaio,Maria Gabriella da S. Araújo,Edilândia Farias Dantas,Aleksandro Ferreira da Silva,Tania Lucia da Costa,Alexandre Brunello,Plínio Barbosa de Camargo,Luiz Antonio Martinelli","doi":"10.1007/s10533-026-01351-x","DOIUrl":"https://doi.org/10.1007/s10533-026-01351-x","url":null,"abstract":"Abstract Natural transects in fundamental resources offer rare opportunities to evaluate how environmental gradients shape plant strategies and biogeochemical cycles. We investigated leaf elemental traits (C, N, C:N) and stable isotopes (δ 13 C, δ 15 N) along a sharp precipitation gradient from the semi-arid Caatinga (500–800 mm yr⁻ 1 ) to the humid Atlantic Forest (2000–2500 mm yr⁻ 1 ) in northeastern Brazil. Using a combination of Bayesian generalized additive models and Random Forest analyses, we quantified longitudinal trends and identified the climatic, edaphic, and functional drivers of foliar composition. Foliar δ 13 C and δ 15 N declined systematically from Caatinga to Atlantic Forest, while foliar N concentration decreased and C:N increased eastward, but with much weaker explanatory power. Random Forest models highlighted precipitation, cation exchange capacity, and soil N and C stocks as key predictors of isotopic variation, whereas foliar N was most strongly linked to SLA and soil bulk density. A notable pattern was the apparent divergence between soil and foliar nitrogen: soil N content increased toward the Atlantic Forest, yet foliar N declined, underscoring the limited value of bulk soil N as an indicator of plant-available N and highlighting the role of functional traits and species turnover. We argue that the Caatinga aligns with other tropical dry ecosystems in exhibiting unusually high foliar δ 15 N, likely reflecting soil 15 N enrichment under strong water limitation and episodic pulses of gaseous N losses. These findings show how water limitation, soil processes, and leaf functional traits interact to shape resource-use strategies across one of the steepest tropical dry–wet transitions worldwide, providing new insights into the mechanisms linking the leaf economics spectrum to isotopic biogeochemistry.","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"11 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148933531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal changes in tree stem and soil methane fluxes along a soil moisture gradient in a subtropical Australian rainforest","authors":"Johannes Dittmann,Damien T. Maher,Scott G. Johnston,Adhwaith Das,James A. Padilla-Montalvo,Atticus E. L. Stovall,Luke C. Jeffrey","doi":"10.1007/s10533-026-01371-7","DOIUrl":"https://doi.org/10.1007/s10533-026-01371-7","url":null,"abstract":"Abstract Natural soil microbial methane (CH 4 ) uptake is well documented, but uncertainty remains about uptake rates in subtropical forest and the extent to which tree stem emissions may offset the soil CH 4 sink. We compared seasonal CH 4 fluxes from trees and soils in a subtropical Australian rainforest. We conducted four campaigns to measure in situ CH 4 fluxes from tree stems and soils across three plots along a moisture gradient (valley floor, lower slope, and upper slope plots). Tree stem and soil CH 4 fluxes showed a significant positive correlation with soil moisture. Valley floor soil CH 4 fluxes transitioned between a CH 4 sink (end dry season: − 151 µmol soil m −2 d −1 ) to a source (end wet season: 830 µmol soil m −2 d −1 ). Drier soils of the slope plots acted as a net CH 4 sink year-round, with average soil CH 4 fluxes of − 135 µmol soil m −2 d −1 (lower slope) and − 156 µmol soil m −2 d −1 (upper slope). In the sloped plots, tree stems emitted negligible CH 4 , except for two “high-emitting” trees, featuring CH 4 fluxes 200 and 300-fold higher than the adjacent trees. In the valley floor at the end of the wet season, tree stem emission contributed an extra 27% to the soil CH 4 source, while in the slope plots, tree CH 4 emissions offset &lt; 1% of soil CH 4 uptake. This study adds to the limited knowledge of high temporal and spatial heterogeneity of upland tree and soil CH 4 fluxes, and it highlights the importance of rainforest soils as important global CH 4 sink.","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"60 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148933532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clay mineral surface area and pore size have contrasting effect on accumulation of soil organic matter fractions in the rhizosphere","authors":"Saliha Irshad,Karel Soukup,Kateřina Setničková,Jan Frouz","doi":"10.1007/s10533-026-01370-8","DOIUrl":"https://doi.org/10.1007/s10533-026-01370-8","url":null,"abstract":"Abstract Clay minerals play an important role in soil organic matter (SOM) accumulation. This study used a series of pot experiments to observe carbon (C) storage in rhizosphere of two plant species Festuca rubra and Lotus corniculatus growing in three soil forming substrates dominated by various clay minerals (kaolinite, illite, and montmorillonite). Plants were either grown in separate pots filled with different substrates or plants were grown in larger pots filled with sand where clay substrates were buried in mesh bags. We tested the hypothesis that mineral associated organic matter (MAOM) storage will increase with increasing surface area of clay minerals (kaolinite &lt; illite &lt; montmorillonite), while the volume of larger pores (Illite &gt; kaolinite and montmorillonite) will promote the storage of particulate organic matter (POM). Overall, the largest C storage was in montmorillonite dominated substrates followed by illite and kaolinite. These trends were the same across both types of clay exposure and for both plant species used. Accumulation of MAOM followed a similar pattern. On the contrary, accumulation of free POM was not affected by clay mineral identity and accumulation of occluded POM was significantly higher in illite compared to the other two minerals. Our results suggest that total surface area of clay minerals is crucial for accumulation of MAOM while occluded POM is more affected by the availability of larger pores.","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"18 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148933533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Minimal thermal adaptation of soil extracellular enzyme activities along a long-term geothermal gradient","authors":"Erica J. Prentice,Vickery L. Arcus,Louis A. Schipper,Charlotte J. Alster","doi":"10.1007/s10533-026-01369-1","DOIUrl":"https://doi.org/10.1007/s10533-026-01369-1","url":null,"abstract":"Abstract Changes in soil nutrient cycling with warming are dependent on differing thermal responses and adaptation strategies of soil microbial communities and the interactions between substrate acquisition through extracellular enzyme activity and utilisation via respiration, metabolism and biomass accumulation. Understanding these processes is complicated by the complexity and variability of soil systems, along with differences in methodologies quantifying adaptation of soil microbial processes. Here we aimed to investigate thermal adaptation for extracellular enzyme activity of three enzyme classes (β-glucosidases, β-N-acetylglucosaminidases and phosphatases) using soils from a field setting with different mean annual temperatures across a long term (&gt; 20 year) geothermal gradient in New Zealand. Extracellular enzyme thermal responses showed increasing rates up to the highest characterised temperature (60 °C) regardless of mean annual soil temperature and minimal adaptation across the gradient for parameters such as activation energy, curvature, and the optimum and minimum temperature of activity. These results are in direct contrast to the previously measured thermal response of respiration and growth rates measured at this site which have an optimum temperature of activity around 30–45 °C and show measurable rates of adaptation across the thermal gradient. This divergence in the thermal response of soil substrate depolymerisation via extracellular enzyme activity compared to respiration and growth rates raises questions around future nutrient bioavailability and utilisation if these two process are decoupled at elevated temperatures under future soil warming.","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"45 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148893592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biophysical and biogeochemical controls on nitrogen fixation in cyanolichen and decaying wood","authors":"Robert E. Heumann,&nbsp;Monica G. Turner,&nbsp;Cory C. Cleveland","doi":"10.1007/s10533-026-01350-y","DOIUrl":"10.1007/s10533-026-01350-y","url":null,"abstract":"<div><p>Cryptic (non-symbiotic) forms of nitrogen (N) fixation are increasingly recognized as a major source of N to natural and agroecosystems, yet the mechanistic controls on cryptic N fixation remain unresolved. A recent synthesis posited that both biophysical (temperature and moisture) and biogeochemical (nutrients) factors regulate N fixation rates, but that biophysical factors exert primary control. Given this conceptual framework, we tested the hypothesis that both biophysical and biogeochemical factors regulate N fixation rates in foliose cyanolichen and decaying wood, but that biogeochemical controls would be stronger when biophysical conditions were more favorable for fixation. We conducted two experiments to explore controls on rates of nitrogenase activity among cyanolichen and decaying wood samples from a temperate lodgepole pine (<i>Pinus contorta</i> var. <i>latifolia</i>) forest. We measured the effects of moisture, temperature, N and phosphorus (P) availability on acetylene reduction rates on samples in both field and growth chamber settings. Moisture and temperature exerted predominant control, but lichen nitrogenase activity responded more to moisture while wood nitrogenase activity responded more to temperature. We found little evidence of nutrient (N and P) controls on nitrogenase activity even when biophysical conditions were favorable for N fixation. Our study suggests that the nature and strength of biophysical and/or biogeochemical controls on cryptic N fixation vary in response to a range of environmental conditions, and that controls on cryptic N fixation may not be consistent across the broad array of cryptic N-fixing niches.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01350-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189989","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":"The land and water costs of the “green energy” transition","authors":"Paolo D’Odorico,&nbsp;Maria Cristina Rulli","doi":"10.1007/s10533-026-01358-4","DOIUrl":"10.1007/s10533-026-01358-4","url":null,"abstract":"<div><p>The transition to renewable energy sources is expected to reduce anthropogenic greenhouse gas emissions and the associated impacts on global climate but it entails an increased human pressure on land and water resources. Here we evaluate the associated shift in environmental costs from climate warming to increased human use of land and water. We evaluate the tradeoffs inherent to the different carbon, land, and water footprints of fossil vs renewable energy sources at local and global scales. While with the industrial revolution human reliance on fossil fuels has coupled economic growth to global CO2 emissions, it has greatly decoupled the energy system from land and water use. Conversely, the transition to renewable (or “green”) energy is now recoupling energy production to local land (and water) use.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 4","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01358-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466569","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":"Unexpected topsoil nitrogen depletion and nitrogen–phosphorus decoupling in global urban greenspaces","authors":"Yuehan Tian,&nbsp;Enzai Du,&nbsp;Hongbo Guo,&nbsp;César Terrer,&nbsp;Nan Xia,&nbsp;Yang Tang,&nbsp;Wim de Vries","doi":"10.1007/s10533-026-01357-5","DOIUrl":"10.1007/s10533-026-01357-5","url":null,"abstract":"<div><p>Urban greenspaces are increasingly recognized for their pivotal ecosystem services. Soil nutrients, such as nitrogen (N) and phosphorus (P), are essential to support plant growth, whereas the characteristics of soil N and P concentrations remain unexplored in global urban greenspaces. We compiled global databases of topsoil N and P concentrations, and N to P ratios (N:P, 0–20 cm depth) in (i) urban greenspaces across 175 cities and (ii) natural ecosystems at 277 sites, respectively. Compared with their natural counterparts, urban greenspaces have lower topsoil total N concentrations (1.69 ± 0.06 vs 2.28 ± 0.10 g·kg⁻¹), comparable topsoil total P concentrations (0.70 ± 0.04 vs 0.61 ± 0.03 g·kg⁻¹), and lower N:P (3.10 ± 0.28 vs 4.71 ± 0.30). Based on additional analyses of observed data on paired urban greenspaces and natural ecosystems, as well as model-predicted N and P concentrations in natural soils at the same sites as the urban greenspaces, we further confirmed the abovementioned differences between urban and natural soils. Topsoil total N and P concentrations both increase significantly toward higher latitudes in urban greenspaces and natural ecosystems, while no significant latitudinal trends are found for topsoil N:P. The global pattern of topsoil total N concentrations in urban greenspaces is significantly associated with climatic, anthropogenic, and vegetational drivers, whereas the topsoil P concentration is strongly correlated with climatic drivers. Unlike natural ecosystems, topsoil total N and P concentrations in urban greenspaces are not correlated significantly. Our findings highlight an unexpected topsoil N depletion and N-P decoupling in global urban greenspaces.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01357-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189805","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":"Precipitation overrides warming with additive effects on greenhouse gas fluxes in an alpine meadow","authors":"Diyang Zou,&nbsp;Xiaoyan Song,&nbsp;Fumei Li,&nbsp;Xi Peng,&nbsp;Weihui Liu,&nbsp;Yang Liu,&nbsp;Lei Hu,&nbsp;Luming Ding,&nbsp;Changting Wang","doi":"10.1007/s10533-026-01355-7","DOIUrl":"10.1007/s10533-026-01355-7","url":null,"abstract":"<div><p>Ecosystem greenhouse gas (GHG) fluxes are strongly regulated by climate change, particularly global warming and precipitation changes. However, their combined effects on carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) fluxes in alpine meadows remain unknown. Therefore, a two-factor experiment with six treatments: control (CK), decreased precipitation by 50% (0.5P), increased precipitation by 50% (1.5P), decreased precipitation by 50% and warming (0.5PW), warming (W), increased precipitation by 50% and warming (1.5PW) was adopted for the alpine meadow. Our two-year observations revealed that warming significantly enhanced the cumulative CH₄ uptake while showing no significant effects on ecosystem respiration (ER) or N₂O fluxes. Precipitation changes markedly influenced ER and cumulative CH₄ fluxes: increased precipitation enhanced ER while decreased precipitation reduced it, whereas CH₄ flux responses depended strongly on inherent soil moisture conditions. Neither warming nor precipitation changes significantly influenced N₂O fluxes. Soil moisture was significantly correlated with all GHG fluxes, including ER, indicating its crucial role in regulating emissions. Interactive effects between precipitation changes and warming generally exhibited additive patterns across the three GHGs, except for the combination of increased precipitation and warming which demonstrated antagonistic effects on ER in 2024. While additive interactions suggest single-factor studies provide valuable insights for multifactor scenarios, this assumption may not hold in years of highly erratic precipitation.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"169 5","pages":""},"PeriodicalIF":4.3,"publicationDate":"2026-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-026-01355-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132575","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}