BIOGEOCHEMISTRY生物地球化学
BIOGEOCHEMISTRY(英文缩写 BIOGEOCHEMISTRY),ISSN 0168-2563,eISSN 1573-515X,中文译名:生物地球化学 是一本学术期刊。本页汇总该期刊的最新影响因子、分区信息以及最新收录于 PubMed 的文献,帮助您快速了解期刊全貌。
发文量统计区间：2025-09-27 至 2026-09-27，按本站收录文献的发表日期统计。
期刊介绍
历年影响因子趋势
| JCR 数据年份 | 影响因子 | JCR 分区 |
|---|---|---|
| 2021 | 4.812 | Q1 |
| 2022 | 4.000 | Q1 |
| 2023 | 3.900 | Q1 |
| 2024 | 3.700 | Q1 |
| 2025 | 4.300 | Q1 |
BIOGEOCHEMISTRY 最新收录文献
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1. Phosphate oxygen isotopes in lake sediments: stability and application for assessing palaeo nutrient dynamics.
PMID:日期:2026-01-01The oxygen isotope composition of phosphate (δO-PO) has been successfully used to study modern biological cycling of phosphorus (P) from the upper few centimetres of lake sediments. However, there is a lack of knowledge regarding the stability and preservation of δO-PO over longer time scales in deeper lake sediments. Three sediment cores were collected from a nutrient-rich lagoon at Rutland Water Nature Reserve to explore P dynamics under controlled conditions, including a baseline (untreated) core and cores stored with oxygen-enriched water at 4 to 7 °C for six months. Results of the baseline core suggests that P in the sediment has undergone biological turnover. Additionally, results of the two treated cores using δO-PO from HCl extractable inorganic P pool remained stable, even under altered water oxygen isotope conditions. These finding offer proof of concept for using δO-PO as a tracer of past nutrient inputs and cycling with a range of potential applications in the area of past ecosystem reconstruction.
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2. Manure application magnifies methane emission from drainage ditch sediments.
PMID:日期:2026-01-01Agricultural drainage ditches have been recently identified as hotspots of methane (CH), carbon dioxide (CO), and nitrous oxide (NO) emissions. Ditches often experience inputs of fertilizers from adjacent agricultural fields, which increases the availability of organic carbon and nutrients in ditch sediments, thereby fueling greenhouse gas (GHG) production. Here, we quantify the effects of two types of fertilizers (manure and artificial fertilizer) on GHG dynamics from agricultural drainage ditch sediments subjected to oxic and anoxic conditions. We first measured rates of potential sediment NO production, CH production, and aerobic CH oxidation under different fertilizer doses. We observed that manure additions (expressed here as ammonium (NH ) dose, referring to the resulting NH concentration in a given bottle after addition) strongly stimulated CH and NO production. Methane production rates increased approximately threefold as a result of manure additions, ranging from 18.4 to 61.7 µmol CH gDW d, whereas NO production rates increased approximately 16-fold, and varied from 0.1 to 1.6 µmol NO gDW d across manure doses. Aerobic CH oxidation was also stimulated by manure addition, while at resulting NH concentrations above 2 mmol L, oxidation rates declined. In contrast, artificial fertilizer caused immediate inhibition of CH and NO production and aerobic CH oxidation, even at the lowest NH concentration tested (0.05 mmol L). Focusing on the effects of manure on GHG emissions, we observed that under anoxic conditions, sediment cores receiving high manure inputs emitted approximately 3.5 times more GHGs (in CO-equivalents) than anoxic controls (no manure) and about 5.5 times more than oxic controls. Methane was the dominant driver of increased emissions at higher manure doses. As fertilizer use continues to rise globally, these results highlight the importance of implementing climate-smart water and nutrient management strategies in ditches and adjacent grasslands to mitigate climate trade-offs. The online version contains supplementary material available at 10.1007/s10533-026-01348-6.
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3. Frequent fire alters soil total phosphorus but does not affect phosphorus availability in a montane grassland.
PMID:日期:2026-01-01Phosphorus (P) is often a limiting nutrient in highly weathered soils. Fire is a major driver of nutrient redistribution and can temporarily increase the pool of plant-available P in P-limited ecosystems. Yet, the long-term effects of frequent fire on soil P in montane grasslands remain poorly understood. We investigated how fire regime influences soil P pools using data from a long-term fire experiment in the South African Drakensberg. Total soil P, moderately labile organic and inorganic P and plant-available P were measured across five prescribed fire regimes varying in frequency (annual, biennial or infrequent) and season of burn (autumn or spring). We hypothesised that frequent fire would not alter total P in the topsoil, but expected it would increase inorganic P and plant-available P. Infrequent and biennial burns had little effect on total P; however, total P was significantly higher under annual spring burns than the other treatments, particularly the infrequent burns and annual or biennial autumn burns. In contrast, plant-available P did not respond to any fire treatment. Frequent spring burns generally increased organic P relative to inorganic P, indicating a shift in the composition of soil P pools with fire frequency and season. Overall, despite changes in topsoil total and organic P, plant-available P remained constrained, reflecting a bottleneck in the P cycle likely driven by the high P-retention capacity of these acidic Andosols. These findings highlight the complex and sometimes counterintuitive effects of fire on nutrient dynamics in montane grasslands. The online version contains supplementary material available at 10.1007/s10533-025-01304-w.
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4. Iron and sulphur regulate carbon dioxide emissions in drained coastal peatlands of The Netherlands.
PMID:日期:2026-01-01Fluctuating groundwater levels in drained peatlands create a transition zone with seasonally changing oxygen availability. This zone drives dynamic iron (Fe) and sulphur (S) cycling under alternating anoxic and oxic conditions, influencing decomposition rates. This study investigated how Fe and S affect decomposition rates and resulting carbon dioxide (CO) emissions under fluctuating redox conditions in transition zone. In a controlled laboratory experiment, peat samples from two drained Dutch coastal peatlands were amended with ferric iron (Fe) and sulphate (SO ) and incubated anoxically to mimic high groundwater tables. This was followed by an oxic phase simulating groundwater table drops. The cycle was repeated with lactate addition to replenish labile carbon. Carbon dioxide emission rates were monitored continuously throughout the anoxic-oxic cycles. Water soluble Fe and S concentrations, exoenzyme activities, and pH were measured before and after the experiment. Carbon dioxide emission rates increased under anoxic conditions with Fe and SO amendments potentially due to stimulation of microbial activity using these compounds as alternative electron acceptors. Short-term oxygenation suppressed emissions compared to controls without amendments. Water-soluble Fe remained stable across treatments, while water-soluble S concentrations changed significantly from initial levels. Exoenzyme activities were primarily influenced by pH, with minimal effects from amendments. The findings show that transition zone is an active redox zone where decomposition dynamics are determined by available electron acceptors in the system, influencing greenhouse gas (GHG) emissions from managed peatlands. This zone should be integrated into future models to improve the accuracy of reporting national GHG emissions. The online version contains supplementary material available at 10.1007/s10533-025-01303-x.
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5. Organic acid concentration thresholds to mobilize phosphorus (P) in dryland soils.
PMID:日期:2026-01-01Available phosphorus (P) concentrations are low in dryland soils due to high pH values linked to the presence of pedogenic carbonates. Thus, dissolution and mobilization of P compounds are important controls on P availability for plants, microbes, and biocrusts. One process that has been hypothesized as a way for dryland organisms to acquire P is the exudation of organic acids that can release bound P compounds. To explore this process, we assayed the critical thresholds of organic acid (citrate, malate, and oxalate) concentrations required to mobilize P in a range of dryland soils. Our results showed that: (1) Concentrations of oxalate or citrate, on the order of 1000 µmol/L are needed to effectively mobilize PO in all landforms and microsites we examined. (2) The in situ organic acid concentrations in bulk soil core samples were < 100 µmol/L, both under plant canopies and in interspaces, suggesting they are below the needed threshold to mobilize P. However, hot spots such as the rhizosphere, though difficult to quantify, may still be locations where the concentration of organic acids approach the threshold. (3) Oxalate was the most effective in releasing PO , likely as a result of removing aqueous Ca via calcium oxalate precipitation. Overall, our results show that for P acquisition through organic acid production to be effective in dryland soils, a relatively high threshold of organic acid concentration that substantially exceeds bulk soil concentrations must be reached, suggesting that if it occurs, it is restricted to localized microsites within the soil matrix. The online version contains supplementary material available at 10.1007/s10533-025-01298-5.
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6. Vegetation type influences particulate organic matter storage along a low Arctic vegetation gradient.
PMID:日期:2025-01-01Permafrost soils constitute a large part of the terrestrial carbon pool that is vulnerable to future climate warming. Continued warming of the low Arctic is also leading to the encroachment of large shrubs and trees into tundra ecosystems with effects on microbial community composition, organic matter cycling and physical soil parameters. To date it is still largely unknown how such vegetation shifts affect soil organic matter cycling in permafrost soils on short and long timescales. Here, we investigated differences in soil organic matter properties under graminoid tussock (), birch shrub (), spruce tree () and alder shrub () vegetation by density fractionation and subsequent measurements of organic carbon, total nitrogen, δC, and lignin phenol biomarker contents. Particulate organic matter constituted 1.3-11.3% of soil weight and stored between 29 and 89% of the total soil lignin, 12-60% of organic carbon and 6-40% of total nitrogen. The contribution of particulate organic matter generally decreased with soil depth. Soils under showed significantly higher amounts of particulate organic matter and stored more lignin, organic carbon and total nitrogen in particulate form in all soil depths. Sites dominated by exhibited higher lignin content and lower degradation state in the subsoil, which was associated with water saturation and low active layer depth. We conclude that the effect of vegetation changes on soil organic matter cycling is dependent on plant species with the encroachment of shrubs potentially increasing the deposition of particulate organic matter into permafrost soils. The online version contains supplementary material available at 10.1007/s10533-025-01294-9.
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7. Temporal variability in dissolved organic matter composition export in streams.
PMID:日期:2025-01-01Export of dissolved organic carbon (DOC) from freshwater systems has been the focus of many studies owing to its pivotal role in regulating global carbon fluxes and ecosystem function. Both the flux and composition of dissolved organic matter (DOM) are critical for understanding its ecological impact, as similar compositions can have vastly different consequences depending on the magnitude of input and hydrological context. However, very little data exists on the composition of DOM export fluxes to downstream ecosystems. Here we investigate the interaction of water temperature and discharge on DOC and DOM composition export fluxes in two streams draining contrasting watersheds (agriculture versus forested) in southern Ontario, Canada across seasons. Using Generalized Additive Models, we observed that both stream discharge and water temperature significantly affected DOM composition, and the proportion of terrestrial humic-like DOM exhibited strong positive relationship with discharge. Although DOC loads were comparable between the two streams, the export loads and fluxes of DOM composition (in terms of fluorescent loads and fluxes) differed significantly. These patterns of DOM composition fluxes in both streams remained consistent across seasons, suggesting that watershed characteristics and nutrient availability primarily govern DOM dynamics and export, while seasonal drivers such as discharge and temperature further modulate these patterns. Export loads and fluxes of DOM components were higher in spring and winter months compared to summer and autumn in both streams, while fluxes also increased at medium (Q10-Q90) and high flow (> Q10) at a variable extent in the contrasting streams. Temperature and discharge regulated export of DOM can be further affected with changing climate and increasing frequency of extreme events and alter the processing and delivery of DOM to downstream ecosystems. The online version contains supplementary material available at 10.1007/s10533-025-01270-3.
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PMID:日期:2025-01-01Ocean surface gravity waves facilitate gas exchanges primarily in two ways: (1) the formation of bubbles during wave breaking increases the surface area available for gas exchange, promoting CO transfer, and (2) wave-current interaction processes alter the sea surface partial pressure of CO and gas solubility, consequently affecting the CO flux. This study tests these influences using a global ocean-ice-biogeochemistry model under preindustrial conditions. The simulation results indicate that both wave-current interaction processes and the sea-state-dependent gas transfer scheme-which explicitly accounts for bubble-mediated gas transfer velocity-influence the air-sea CO flux, with substantial spatial and seasonal variations. In the equatorial region (10 S-10 N), both processes enhance the CO outgassing flux, with comparable magnitudes (more than 10% on average). However, in the region between approximately 10 and 35 , the impact of ocean surface waves on the air-sea CO flux via the sea-state-dependent gas transfer velocity is greater than that of the wave-current interaction processes, with opposing directions of influence. During winter, the sea-state-dependent gas transfer velocity enhances the CO uptake flux, while in the summer season, it increases the CO outgassing flux. In regions poleward of 35 , the impact of wave-current interaction processes on CO exchange dominates over that of the sea-state-dependent gas transfer velocity. It is worth noting that the impact of wave-current interaction processes on air-sea CO flux is primarily driven by changes in the ratio between the concentrations of dissolved inorganic carbon and total alkalinity, with variations in sea surface temperature exerting an opposite influence on pCO , albeit with a smaller magnitude. Overall, wave-related processes should be considered in Earth System Models to better model the carbon cycle. The online version contains supplementary material available at 10.1007/s10533-025-01267-y.
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9. Influence of temperature on selenium mobility under contrasting redox conditions: a sediment flow-through reactor experiment.
PMID:日期:2025-01-01Selenium (Se) biogeochemistry in boreal and permafrost-rich soils and sediments remains poorly constrained, despite its importance as both an essential micronutrient and potential contaminant. As climate change accelerates warming in northern ecosystems, the mobilization of vast carbon pools may significantly alter Se cycling and bioavailability, with cascading effects on aquatic food webs. In this context, we aim to investigate how temperature and organic matter (OM) lability influence Se redox dynamics in lake sediments, providing insights for predicting its behavior as these northern ecosystems continue to warm. We studied Se sequestration as a function of OM lability, temperature (4 and 23 °C) and Se speciation in minimally disturbed lacustrine sediments using flow-through reactors (FTRs). Initial sediments contained OM characterized as either labile (fresh) or recalcitrant (aged), and were fed with environmentally relevant, low Se concentrations and filtered lake water. We monitored Se concentration as well as speciation along with pH and the concentrations of dissolved OM, NO , NO , Fe(II), SO and HS in the outflow of FTRs during 8 experimental phases. All sediments sequestered a large proportion of Se, with FTRs containing fresh OM removing 50% more Se than those containing aged OM. Along with a higher production of reduced species, such as ferrous Fe and sulfides, in the reactors with fresh OM, this result is consistent with reducing conditions promoting Se sequestration. Inflowing selenite was sequestered to a larger extent than inflowing selenate. Lastly, only selenate removal responded strongly to temperature. With an inflow concentration of 100 nM, selenate was sequestered at a rate of 92 pmol cm d at 23 °C, which decreased to 80 pmol cm d at 4 °C. In selenate removal experiments, outflow Se speciation consisted mostly of organic Se species at 23 °C and, in contrast, entirely of selenate at 4 °C. We hypothesize that selenate removal proceeded via microbial processes, consistent with temperature-dependent reactions catalyzed by enzymes. Overall, our findings suggest that the mobilization and warming of the boreal and permafrost carbon pools may increase the capacity of aquatic environments to sequester Se, lowering its bioavailability. The online version contains supplementary material available at 10.1007/s10533-025-01256-1.
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10. Ironing out the question: what is limiting cyanobacteria in freshwater lakes in the Prairie Pothole Region?
PMID:日期:2025-01-01The Canadian Prairie Pothole Region is a notable hotspot for cyanobacteria-dominated lakes. This study found minor variations in cyanobacterial genera across these lakes yet observed significant differences in standing biomass, as the lakes ranged from oligotrophic to hypereutrophic classifications. A correlational analysis of nutrients, specifically total phosphorus (TP) and total nitrogen (TN) revealed that the limiting nutrients varied considerably across the region. Of the lakes studied, cyanobacterial biomass was P-limited in 21 lakes, N-limited in 3 lakes, and co-limited by both P and N in 23 lakes. Surprisingly, in 32 lakes, the biomass was limited by neither P nor N. In these lakes, iron (Fe) emerged as the most likely limiting nutrient, given a relatively narrow range of free ferric Fe (pFe) between 18 and 26. Cyanobacteria can create biomass under Fe stress by producing Fe-scavenging siderophores that target pFe. However, in neither P- nor N-limited lakes, there was a lack of correlation between siderophore concentrations and cyanobacterial biomass (r = 0.05), indicating that the siderophores were unable to scavenge Fe and thereby utilize the available P and N to produce further cyanobacterial biomass. Our findings suggest that these Fe-starved eutrophic lakes exhibited a paradox of slow-growing yet high cyanobacterial biomass, challenging the notion that only oligotrophic lakes embody slow-growing metabolisms. Overall, our study highlights the importance of considering nutrient limitations on cyanobacterial growth and incorporating macro- (P and N) and micro- (Fe) nutrient limitation considerations into existing nutrient management strategies to mitigate cyanobacterial dominance effectively. The online version contains supplementary material available at 10.1007/s10533-025-01234-7.