Biogeochemistry最新文献

{"title":"Correction to: The roles of microorganisms in litter decomposition and soil formation","authors":"Satoru Hobara, Takashi Osono, Dai Hirose, Kenta Noro, Mitsuru Hirota, Ronald Benner","doi":"10.1007/s10533-024-01118-2","DOIUrl":"10.1007/s10533-024-01118-2","url":null,"abstract":"","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 2","pages":"197 - 198"},"PeriodicalIF":3.9,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-024-01118-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139525360","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":"Correction to: Ultrahigh resolution dissolved organic matter characterization reveals distinct permafrost characteristics on the Peel Plateau, Canada","authors":"M. R. N. Moore, S. E. Tank, M. R. Kurek, M. Taskovic, A. M. McKenna, J. L. J. Smith, S. V. Kokelj, R. G. M. Spencer","doi":"10.1007/s10533-023-01114-y","DOIUrl":"10.1007/s10533-023-01114-y","url":null,"abstract":"","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 2","pages":"119 - 119"},"PeriodicalIF":3.9,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139530816","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":"The Median Isn’t the Message: soil nutrient hot spots have a disproportionate influence on biogeochemical structure across years, seasons, and depths","authors":"Morgan E. Barnes,&nbsp;Dale W. Johnson,&nbsp;Stephen C. Hart","doi":"10.1007/s10533-023-01107-x","DOIUrl":"10.1007/s10533-023-01107-x","url":null,"abstract":"<div><p>Soil nutrient distribution is heterogeneous in space and time, potentially altering nutrient acquisition by trees and microorganisms. Ecologists have distinguished “hot spots” (HSs) as areas with enhanced and sustained rates of nutrient fluxes relative to the surrounding soil matrix. We evaluated the spatial and temporal patterns in nutrient flux HSs in two mixed-conifer forest soils by repeatedly sampling the soil solution at the same spatial locations (horizontally and vertically) over multiple seasons and years using ion exchange resins incubated in situ. The climate of these forests is Mediterranean, with intense fall rains occurring following summers with little precipitation, and highly variable winter snowfall. Hot spots formed most often for NO₃⁻ and Na⁺. Although nutrient HSs often occurred in the same spatial location multiple times, HSs persisted more often for PO₄³⁻ NH₄⁺, and NO₃⁻, and were more transient for Ca²⁺, Mg²⁺, and Na⁺. Sampling year (annual precipitation ranged from 558 to 1223 mm) impacted the occurrence of HSs for most nutrients, but season was only significant for PO₄³⁻, NH₄⁺, NO₃⁻, and Na⁺, with HSs forming more often after fall rains than after spring snowmelt. The frequency of HSs significantly decreased with soil depth for all nutrients, forming most commonly immediately below the surficial organic horizon. Although HSs accounted for less than 17% of the sampling volume, they were responsible for 56–88% of PO₄³⁻, NH₄⁺, and NO₃⁻ resin fluxes. Our results suggest that macronutrient HSs have a disproportional contribution to soil biogeochemical structure, with implications for vegetation nutrient acquisition strategies and biogeochemical models.</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":"167 1","pages":"75 - 95"},"PeriodicalIF":3.9,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-023-01107-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139436793","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":"Degradation increases peat greenhouse gas emissions in undrained tropical peat swamp forests","authors":"Erin Swails,&nbsp;Steve Frolking,&nbsp;Jia Deng,&nbsp;Kristell Hergoualc’h","doi":"10.1007/s10533-023-01110-2","DOIUrl":"10.1007/s10533-023-01110-2","url":null,"abstract":"<div><p>Tropical peat swamp degradation can modify net peat greenhouse gas (GHG) emissions even without drainage. However, current Intergovernmental Panel on Climate Change (IPCC) guidelines do not provide default emission factors (EF) for anthropogenically-degraded undrained organic soils. We reviewed published field measurements of peat GHG fluxes in undrained undegraded and degraded peat swamp forests in Southeast Asia (SEA) and Latin America and the Caribbean (LAC). Degradation without drainage shifted the peat from a net CO₂ sink to a source in both SEA (− 2.9 ± 1.8 to 4.1 ± 2.0 Mg CO₂–C ha⁻¹ yr⁻¹) and LAC (− 4.3 ± 1.8 to 1.4 ± 2.2 Mg CO₂–C ha⁻¹ yr⁻¹). It raised peat CH₄ emissions (kg C ha⁻¹ yr⁻¹) in SEA (22.1 ± 13.6 to 32.7 ± 7.8) but decreased them in LAC (218.3 ± 54.2 to 165.0 ± 4.5). Degradation increased peat N₂O emissions (kg N ha⁻¹ yr⁻¹) in SEA forests (0.9 ± 0.5 to 4.8 ± 2.3) (limited N₂O data). It shifted peat from a net GHG sink to a source in SEA (− 7.9 ± 6.9 to 20.7 ± 7.4 Mg CO₂-equivalent ha⁻¹ yr⁻¹) and increased peat GHG emissions in LAC (9.8 ± 9.0 to 24.3 ± 8.2 Mg CO₂-equivalent ha⁻¹ yr⁻¹). The large observed increase in net peat GHG emissions in undrained degraded forests compared to undegraded conditions calls for their inclusion as a new class in the IPCC guidelines. As current default IPCC EF for tropical organic soils are based only on data collected in SEA ombrotrophic peatlands, expanded geographic representation and refinement of peat GHG EF by nutrient status are also needed.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 1","pages":"59 - 74"},"PeriodicalIF":3.9,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-023-01110-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139379461","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":"Mercury cycling in the U.S. Rocky Mountains: a review of past research and future priorities","authors":"Hannah R. Miller,&nbsp;Charles T. Driscoll,&nbsp;Eve-Lyn S. Hinckley","doi":"10.1007/s10533-023-01108-w","DOIUrl":"10.1007/s10533-023-01108-w","url":null,"abstract":"<div><p>Mercury cycles at levels three- to five-fold higher today than the pre-Industrial era, resulting in global contamination of ecosystems. In the western United States (U.S.), mercury mobilization has led to widespread production of methylmercury (MeHg), a potent, bioaccumulating neurotoxin, which has resulted in fish consumption advisories across all states. Mountain regions are particularly sensitive to continued mercury contamination as they receive higher rates of atmospheric deposition, compared to lower elevations, and have aquatic ecosystems on the landscape conducive to MeHg production. In this paper, we focus on the U.S. Rocky Mountain region and synthesize: (1) current knowledge regarding the mercury cycle; (2) impacts of climate change on the mercury cycle connected to hydrology and wildfire; and (3) future research priorities for informing mercury research and regulation. Studies on the interactions between mercury contamination and climate change in mountain ecosystems is still nascent. We use the findings from this synthesis to summarize the following research needs: (1) quantify sources of mercury in wet and dry deposition, as these pathways dictate mercury exposure and toxicity, and are shifting with climate change; (2) investigate MeHg in mountain aquatic ecosystems, which are important pathways of human mercury exposure and provide food resources and habitat to local wildlife; and (3) examine the disproportionate impact of mercury contamination on indigenous communities through community-led research. Although we focus on the Rocky Mountains for this review, the findings are applicable to semi-arid mountain ecosystems globally and must be prioritized to promote the health of ecosystems and people everywhere.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 1","pages":"1 - 20"},"PeriodicalIF":3.9,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139034493","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":"Dynamics of trace elements during litter decomposition in a temperate forest as a function of elevation and canopy coverage","authors":"Xinning Zhao,&nbsp;Fei Zang,&nbsp;Na Li,&nbsp;Fangyuan Huang,&nbsp;Yapeng Chang,&nbsp;Chuanyan Zhao","doi":"10.1007/s10533-023-01111-1","DOIUrl":"10.1007/s10533-023-01111-1","url":null,"abstract":"<div><p>Litter plays a key role in maintaining the nutrient cycle of the forest ecosystem. The dynamics of litter trace elements (TEs) can influence litter decomposition and biogeochemical cycling across plant and soil systems. However, our understanding of the biogeochemical cycle of TEs during litter decomposition remains limited. We investigated litter production, the concentrations and fluxes of needle litter TEs over 1 year, and the accumulation and release patterns of TEs at different elevations and canopy coverage during litter decomposition over 3.9 years for the Qinghai spruce in the Qilian Mountains. The concentrations and fluxes of TEs in the needle litter decreased in the following order: Zn &gt; Ni &gt; Cr &gt; Cu &gt; Pb &gt; Co &gt; Cd &gt; Ag. TEs concentrations increased with decomposition time at different elevations, and Co, Cr, Cu, Ni, Pb, and Cd accumulated the fastest at 2850 m. Zn and Ag accumulated the fastest at 3450 and 3050 m, respectively. The fastest accumulation trends were for Co, Cu, Ni, Pb, Zn, Ag, and Cd concentrations at low canopy coverage. Cr accumulated the fastest at middle canopy coverage. The concentrations of Co, Cu, Pb, Zn, Ag, and Cd followed the trend of enrichment–release–enrichment, while Ni and Cr concentrations followed the trends of release–enrichment and sustained enrichment, respectively. Our study is important for an improved understanding of the TE cycle during litter decomposition. It provides theoretical support for healthy soil management and element cycling in the forest of the Qilian Mountains.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 1","pages":"39 - 57"},"PeriodicalIF":3.9,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138886920","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":"Nitrogen fixation across the aquascape: current perspectives, future priorities","authors":"Amy M. Marcarelli,&nbsp;Robinson W. Fulweiler,&nbsp;J. Thad Scott","doi":"10.1007/s10533-023-01112-0","DOIUrl":"10.1007/s10533-023-01112-0","url":null,"abstract":"<div><p>Di-nitrogen (N₂) fixation rates, and the diversity of the organisms that fix N₂, remain largely unconstrained in the aquatic landscapes or aquascapes (e.g., lakes, wetlands, streams, rivers, estuaries) between land and sea. As a result, we lack a mechanistic understanding of the controls and contributions of N₂ fixation across disparate aquatic environments, and cannot accurately incorporate this process into local and global nitrogen (N) budgets. This special issue brings together papers highlighting current advances in understanding of N₂ fixation within and across all aquatic habitats, integrating novel methodology for studying N₂ fixation, quantification of N₂ fixation fluxes in understudied habitats, the role of N₂ fixation in biotic assemblages, and the rate and fate of fixed N in heterogeneous landscapes. Together, these papers address important gaps in understanding and highlight the frontiers of research on N₂ fixation in aquatic habitats.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"166 3","pages":"159 - 165"},"PeriodicalIF":3.9,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138635101","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":"Elevated temperature and nutrients lead to increased N2O emissions from salt marsh soils from cold and warm climates","authors":"Sophie A. Comer-Warner,&nbsp;Sami Ullah,&nbsp;Arunabha Dey,&nbsp;Camille L. Stagg,&nbsp;Tracy Elsey-Quirk,&nbsp;Christopher M. Swarzenski,&nbsp;Fotis Sgouridis,&nbsp;Stefan Krause,&nbsp;Gail L. Chmura","doi":"10.1007/s10533-023-01104-0","DOIUrl":"10.1007/s10533-023-01104-0","url":null,"abstract":"<div><p>Salt marshes can attenuate nutrient pollution and store large amounts of ‘blue carbon’ in their soils, however, the value of sequestered carbon may be partially offset by nitrous oxide (N₂O) emissions. Global climate and land use changes result in higher temperatures and inputs of reactive nitrogen (Nr) into coastal zones. Here, we investigated the combined effects of elevated temperature (ambient + 5℃) and Nr (double ambient concentrations) on nitrogen processing in marsh soils from two climatic regions (Quebec, Canada and Louisiana, U.S.) with two vegetation types, <i>Sporobolus alterniflorus</i> (= <i>Spartina alterniflora</i>) and <i>Sporobolus pumilus</i> (= <i>Spartina patens</i>), using 24-h laboratory incubation experiments. Potential N₂O fluxes increased from minor sinks to major sources following elevated treatments across all four marsh sites. One day of potential N₂O emissions under elevated treatments (representing either long-term sea surface warming or short-term ocean heatwaves effects on coastal marsh soil temperatures alongside pulses of N loading) offset 15–60% of the potential annual ambient N₂O sink, depending on marsh site and vegetation type. Rates of potential denitrification were generally higher in high latitude than in low latitude marsh soils under ambient treatments, with low ratios of N₂O:N₂ indicating complete denitrification in high latitude marsh soils. Under elevated temperature and Nr treatments, potential denitrification was lower in high latitude soil but higher in low latitude soil as compared to ambient conditions, with incomplete denitrification observed except in Louisiana <i>S. pumilus</i>. Overall, our findings suggest that a combined increase in temperature and Nr has the potential to reduce salt marsh greenhouse gas (GHG) sinks under future global change scenarios.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 1","pages":"21 - 37"},"PeriodicalIF":3.9,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-023-01104-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138635020","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":"Peatland restoration pathways to mitigate greenhouse gas emissions and retain peat carbon","authors":"Ülo Mander,&nbsp;Mikk Espenberg,&nbsp;Lulie Melling,&nbsp;Ain Kull","doi":"10.1007/s10533-023-01103-1","DOIUrl":"10.1007/s10533-023-01103-1","url":null,"abstract":"<div><p>Peatlands play a crucial role in the global carbon (C) cycle, making their restoration a key strategy for mitigating greenhouse gas (GHG) emissions and retaining C. This study analyses the most common restoration pathways employed in boreal and temperate peatlands, potentially applicable in tropical peat swamp forests. Our analysis focuses on the GHG emissions and C retention potential of the restoration measures. To assess the C stock change in restored (rewetted) peatlands and afforested peatlands with continuous drainage, we adopt a conceptual approach that considers short-term C capture (GHG exchange between the atmosphere and the peatland ecosystem) and long-term C sequestration in peat. The primary criterion of our conceptual model is the capacity of restoration measures to capture C and reduce GHG emissions. Our findings indicate that carbon dioxide (CO₂) is the most influential part of long-term climate impact of restored peatlands, whereas moderate methane (CH₄) emissions and low N₂O fluxes are relatively unimportant. However, lateral losses of dissolved and particulate C in water can account up to a half of the total C stock change. Among the restored peatland types, Sphagnum paludiculture showed the highest CO₂ capture, followed by shallow lakes and reed/grass paludiculture. Shallow lakeshore vegetation in restored peatlands can reduce CO₂ emissions and sequester C but still emit CH₄, particularly during the first 20 years after restoration. Our conceptual modelling approach reveals that over a 300-year period, under stable climate conditions, drained bog forests can lose up to 50% of initial C content. In managed (regularly harvested) and continuously drained peatland forests, C accumulation in biomass and litter input does not compensate C losses from peat. In contrast, rewetted unmanaged peatland forests are turning into a persistent C sink. The modelling results emphasized the importance of long-term C balance analysis which considers soil C accumulation, moving beyond the short-term C cycling between vegetation and the atmosphere.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 4","pages":"523 - 543"},"PeriodicalIF":3.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-023-01103-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138589147","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":"Decomposition of lignin and carbohydrates in a rewetted peatland: a comparative analysis of surface water and anaerobic soil layers","authors":"Julia Reuter,&nbsp;Hendrik Reuter,&nbsp;Dominik Zak","doi":"10.1007/s10533-023-01102-2","DOIUrl":"10.1007/s10533-023-01102-2","url":null,"abstract":"<div><p>The rewetting of long-term drained peatlands leads to the development of eutrophic shallow lakes, gradually inhabited by reed communities. These shallow lakes are characterized by significant nutrient and methane emissions. To comprehend the fate of organic compounds from decaying <i>Phragmites australis</i> litter in water and anaerobic soil layers, we conducted a 1.6-year decomposition experiment. The experiment employed bulk and lignin-derived phenol analysis, as well as Fourier-transform infrared spectroscopy. As anticipated, the highest level of decomposition was observed in the surface water body of the shallow lake, while the non-rooted degraded peat exhibited the lowest decay. The bulk mass loss of plant litter decreased with depth from 55 to 27% across the four decomposition environments. Analysis using infrared spectroscopy indicated that the decrease in mass loss was primarily driven by the breakdown of carbohydrates, which constitute a significant portion of plant litter. Interestingly, litter in the rooted degraded peat layer exhibited the highest degree of lignin decay. Furthermore, the study revealed a preferential loss of vanillin phenols and an accumulation of p-hydroxyl phenols. These findings suggest that the increased methane emissions in rewetted fens may be partially attributed to the demethoxylation of vanillin phenols and the subsequent formation of p-hydroxyl phenols. In conclusion, this study provides valuable insights into anaerobic lignin decomposition of plant litter and sheds light on potential mechanisms underlying elevated methane emissions in rewetted peatlands. Furthermore, the study’s findings hold significant implications for both carbon cycling and sequestration within these ecosystems, thereby stimulating further research into the microbial community and its extended effects.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":"167 4","pages":"545 - 561"},"PeriodicalIF":3.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-023-01102-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138550806","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}