Environmental Microbiology Reports最新文献_第4页

Microbiome-Mediated Resistance of Wild Tomato to the Invasive Insect Prodiplosis longifila 微生物介导的野生番茄对入侵昆虫长芽霉的抗性研究

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-09 DOI: 10.1111/1758-2229.70190

Stalin Sarango Flores, Viviane Cordovez, Ben O. Oyserman, Luisa M. Arias Giraldo, Nejc Stopnisek, Jos M. Raaijmakers, Pieter van ’t Hof

{"title":"Microbiome-Mediated Resistance of Wild Tomato to the Invasive Insect Prodiplosis longifila","authors":"Stalin Sarango Flores, Viviane Cordovez, Ben O. Oyserman, Luisa M. Arias Giraldo, Nejc Stopnisek, Jos M. Raaijmakers, Pieter van ’t Hof","doi":"10.1111/1758-2229.70190","DOIUrl":"10.1111/1758-2229.70190","url":null,"abstract":"Plant roots are colonised by diverse communities of microorganisms that can affect plant growth and enhance plant resistance to (a) biotic stresses. We investigated the role of the indigenous soil microbiome in the resistance of tomato to the invasive sap-sucking insect Prodiplosis longifila (Diptera: Cecidomyiidae). Native and agricultural soils were sampled from the Andes in Southern Ecuador and tested, in greenhouse bioassays, for leaf tissue damage caused by P. longifila on domesticated Solanum lycopersicum cv. Moneymaker and wild tomato S. pimpinellifolium. We observed no significant differences in insect damage between domesticated and wild tomatoes grown in live native or agricultural soils. However, when grown in sterilised native and agricultural soils, wild tomato was more severely affected by the insect than the domesticated tomato. Microbiome analyses revealed that soil sterilisation impacted overall rhizobacterial diversity and abundance in wild tomato. Particularly, Actinoplanes abundance was reduced upon sterilisation, which significantly correlated with loss of insect resistance. Metagenome analyses and genome assembly of Micromonosporaceae (Actinoplanes family) suggested a putative association between motility, chemotaxis, membrane transport, chorismate, and lanthipeptide biosynthesis and insect resistance. This indicates that wild S. pimpinellifolium, in contrast to domesticated S. lycopersicum, relies on specific members of the root-associated microbiome for P. longifila protection.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genomic Characterisation of Limosilactobacillus fermentum CRL2085 Unveiling Probiotic Traits for Application in Cattle Feed 发酵乳酸杆菌CRL2085的基因组特征揭示了益生菌在牛饲料中的应用

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-08 DOI: 10.1111/1758-2229.70176

Cecilia M. Aristimuño Ficoseco, Daniele Chieffi, Marco Montemurro, Annarita Bavaro, Carlo G. Rizzello, Maria E. F. Nader-Macias, Silvina Fadda, Francesca Fanelli, Vincenzina Fusco, Graciela M. Vignolo

{"title":"Genomic Characterisation of Limosilactobacillus fermentum CRL2085 Unveiling Probiotic Traits for Application in Cattle Feed","authors":"Cecilia M. Aristimuño Ficoseco, Daniele Chieffi, Marco Montemurro, Annarita Bavaro, Carlo G. Rizzello, Maria E. F. Nader-Macias, Silvina Fadda, Francesca Fanelli, Vincenzina Fusco, Graciela M. Vignolo","doi":"10.1111/1758-2229.70176","DOIUrl":"10.1111/1758-2229.70176","url":null,"abstract":"Limosilactobacillus fermentum CRL2085, isolated from feedlot cattle rations, displayed high efficiency as a probiotic when administered to animals. A comprehensive genomic analysis was performed to elucidate the genetic basis underlying its probiotic potential. Fifteen genomic islands and CRISPR-Cas elements were identified in its genome. Pan-genomic analysis highlighted the dynamic evolution of this species, and clustering based on the nucleotide genomic similarity only partially correlated with the source of isolation or the geographic origin of the strains. Several genes known to confer probiotic properties were identified, including those related to adhesion, resistance to acidic pH and bile salts, tolerance to oxidative stress, metabolism/transport of sugars and other compounds, and genes for exopolysaccharide biosynthesis. In silico analysis of antimicrobial resistance genes and virulence determinants confirmed the safety of this strain. Moreover, genes related to B-group vitamins biosynthesis and feruloyl esterase hydrolase were also found, showing the nutritional contribution of the strain, which also showed moderate adhesion capability, exopolysaccharide production when grown with sucrose, and the capacity to metabolise 42 out of 95 carbon substrates tested. This data provides the genetic basis for deciphering the mechanisms beyond the benefits demonstrated by its use during cattle intensive raising and confirms its promising role as a probiotic.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plastic-Microbial BioRemediation DB: A Curated Database for Multi-Omics Applications 塑料-微生物生物修复数据库：多组学应用的策划数据库

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-08 DOI: 10.1111/1758-2229.70178

Silvia Petraro, Chiara Tarracchini, Leonardo Mancabelli, Gabriele Andrea Lugli, Francesca Turroni, Marco Ventura, Christian Milani

{"title":"Plastic-Microbial BioRemediation DB: A Curated Database for Multi-Omics Applications","authors":"Silvia Petraro, Chiara Tarracchini, Leonardo Mancabelli, Gabriele Andrea Lugli, Francesca Turroni, Marco Ventura, Christian Milani","doi":"10.1111/1758-2229.70178","DOIUrl":"10.1111/1758-2229.70178","url":null,"abstract":"Plastic pollution is a major environmental challenge, with millions of tonnes produced annually and accumulating in ecosystems, causing long-term harm. Conventional disposal methods, such as landfilling and incineration, are often inadequate, emphasising the need for sustainable solutions like bioremediation. However, the bacterial biodiversity involved in plastic biodegradation remains poorly understood. To address this gap, we present the Plastic-Microbial BioRemediation (Plastic-MBR) database, a curated multi-omics resource that integrates publicly available genetic and enzymatic data related to putative plastic-degrading microorganisms. This database supports in silico analyses of metagenomic data from plastic-contaminated environments and comparative genomics, aiming to identify microbial taxa with potential plastic-degrading functions. We validated the functionality of the Plastic-MBR database by applying it to metagenomic datasets from plastic-contaminated soil and river water, successfully identifying numerous putative plastic-degrading genes across diverse microbial taxa. These results support the use of the Plastic-MBR database as a tool to identify candidate bacteria for future experimental validation, strain isolation, and functional studies, ultimately contributing to a deeper understanding of microbial potential in plastic bioremediation. While this study focuses on database development and computational validation, future studies will be essential to confirm and translate these genomic predictions into effective bioremediation strategies.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plastic-Microbial BioRemediation DB: A Curated Database for Multi-Omics Applications 塑料-微生物生物修复数据库：多组学应用的策划数据库

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-08 DOI: 10.1111/1758-2229.70178

Silvia Petraro, Chiara Tarracchini, Leonardo Mancabelli, Gabriele Andrea Lugli, Francesca Turroni, Marco Ventura, Christian Milani

{"title":"Plastic-Microbial BioRemediation DB: A Curated Database for Multi-Omics Applications","authors":"Silvia Petraro, Chiara Tarracchini, Leonardo Mancabelli, Gabriele Andrea Lugli, Francesca Turroni, Marco Ventura, Christian Milani","doi":"10.1111/1758-2229.70178","DOIUrl":"10.1111/1758-2229.70178","url":null,"abstract":"Plastic pollution is a major environmental challenge, with millions of tonnes produced annually and accumulating in ecosystems, causing long-term harm. Conventional disposal methods, such as landfilling and incineration, are often inadequate, emphasising the need for sustainable solutions like bioremediation. However, the bacterial biodiversity involved in plastic biodegradation remains poorly understood. To address this gap, we present the Plastic-Microbial BioRemediation (Plastic-MBR) database, a curated multi-omics resource that integrates publicly available genetic and enzymatic data related to putative plastic-degrading microorganisms. This database supports in silico analyses of metagenomic data from plastic-contaminated environments and comparative genomics, aiming to identify microbial taxa with potential plastic-degrading functions. We validated the functionality of the Plastic-MBR database by applying it to metagenomic datasets from plastic-contaminated soil and river water, successfully identifying numerous putative plastic-degrading genes across diverse microbial taxa. These results support the use of the Plastic-MBR database as a tool to identify candidate bacteria for future experimental validation, strain isolation, and functional studies, ultimately contributing to a deeper understanding of microbial potential in plastic bioremediation. While this study focuses on database development and computational validation, future studies will be essential to confirm and translate these genomic predictions into effective bioremediation strategies.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Plant Species and De-Icing Salt on Microbial Communities in Bioretention 植物种类和除冰盐对生物保鲜中微生物群落的影响

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-07 DOI: 10.1111/1758-2229.70193

Henry Beral, Jacques Brisson, Margit Kõiv-Vainik, Joan Laur, Danielle Dagenais

{"title":"Influence of Plant Species and De-Icing Salt on Microbial Communities in Bioretention","authors":"Henry Beral, Jacques Brisson, Margit Kõiv-Vainik, Joan Laur, Danielle Dagenais","doi":"10.1111/1758-2229.70193","DOIUrl":"10.1111/1758-2229.70193","url":null,"abstract":"Bioretention (BR) systems are green infrastructures used to manage runoff even in cold climates. Bacteria and fungi play a role in BR's performance. This mesocosm study investigated the influence of plant species and de-icing salt on the diversity, the community composition, and the differential abundance of bacteria and fungi in BR. Cornus sericea, Juncus effusus, Iris versicolor and Sesleria autumnalis were selected. They are planted in BR while differing in terms of biological forms and functional traits. The semi-synthetic stormwater used was supplemented in spring with four NaCl concentrations (0, 250, 1000 or 4000 mg Cl.L−1). Soil was sampled before the experiment, before salt application, and 5 months after the end of the salt treatment. The bacterial and fungal taxa were characterised by sequencing the 16S and ITS regions. The bacteria and fungi found in the BR were adapted to a cold, humid, and contaminated environment. No differences in microbial communities and their functions between treatments were perceivable 5 months after salt treatment. The taxa abundantly present are involved in functions related to the nitrogen cycle, degradation of hydrocarbons, metals tolerance, and remediation. Some were putative plant beneficial symbionts. The presence of certain microbial taxa varied significantly between plant species.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring Bacterial Interactions Under the Stress Gradient Hypothesis in Response to Selenium Stress 探讨细菌在硒胁迫下的应激梯度相互作用

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-05 DOI: 10.1111/1758-2229.70191

Kristian J. Harris, Alison E. Bennett

{"title":"Exploring Bacterial Interactions Under the Stress Gradient Hypothesis in Response to Selenium Stress","authors":"Kristian J. Harris, Alison E. Bennett","doi":"10.1111/1758-2229.70191","DOIUrl":"10.1111/1758-2229.70191","url":null,"abstract":"The Stress Gradient Hypothesis (SGH) predicts that interspecific interactions shift from competition under low stress to facilitation under high stress. Historically, this framework has been extensively studied in plants, but its application to microbial communities remains underexplored. Here, we review literature to examine bacterial interactions under heavy metal stress, using selenium (Se) stress as a model for heavy metal-induced environmental pressures. Se, a naturally occurring and anthropogenic metalloid contaminant, provides oxidative stress on bacteria, which will modify competitive and facilitative behaviours under the SGH framework. At low Se concentrations, bacterial interactions are predominantly competitive, driven by resource competition and antimicrobial strategies. However, as Se stress increases, we predict facilitative interactions to increase, including detoxification mechanisms that reduce toxicity for Se intolerant species. We discuss methodologies to measure bacterial competition and facilitation, propose experimental approaches to identify the transition between these interaction modes, and explore the implications of species richness in microbial stress resilience. Understanding these interactions provides insights into microbial ecology, biogeochemical cycling and potential applications in bioremediation.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring Bacterial Interactions Under the Stress Gradient Hypothesis in Response to Selenium Stress 探讨细菌在硒胁迫下的应激梯度相互作用

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-05 DOI: 10.1111/1758-2229.70191

Kristian J. Harris, Alison E. Bennett

{"title":"Exploring Bacterial Interactions Under the Stress Gradient Hypothesis in Response to Selenium Stress","authors":"Kristian J. Harris, Alison E. Bennett","doi":"10.1111/1758-2229.70191","DOIUrl":"10.1111/1758-2229.70191","url":null,"abstract":"The Stress Gradient Hypothesis (SGH) predicts that interspecific interactions shift from competition under low stress to facilitation under high stress. Historically, this framework has been extensively studied in plants, but its application to microbial communities remains underexplored. Here, we review literature to examine bacterial interactions under heavy metal stress, using selenium (Se) stress as a model for heavy metal-induced environmental pressures. Se, a naturally occurring and anthropogenic metalloid contaminant, provides oxidative stress on bacteria, which will modify competitive and facilitative behaviours under the SGH framework. At low Se concentrations, bacterial interactions are predominantly competitive, driven by resource competition and antimicrobial strategies. However, as Se stress increases, we predict facilitative interactions to increase, including detoxification mechanisms that reduce toxicity for Se intolerant species. We discuss methodologies to measure bacterial competition and facilitation, propose experimental approaches to identify the transition between these interaction modes, and explore the implications of species richness in microbial stress resilience. Understanding these interactions provides insights into microbial ecology, biogeochemical cycling and potential applications in bioremediation.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbiome Composition in a Common Mediterranean Bryozoan Following an Unprecedented Marine Heatwave 在前所未有的海洋热浪之后，普通地中海苔藓虫的微生物组成

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-04 DOI: 10.1111/1758-2229.70185

Blanca Figuerola, Cristina Linares, Claudia Aparicio-Estalella, Paula López-Sendino, Joaquim Garrabou, Javier del Campo

{"title":"Microbiome Composition in a Common Mediterranean Bryozoan Following an Unprecedented Marine Heatwave","authors":"Blanca Figuerola, Cristina Linares, Claudia Aparicio-Estalella, Paula López-Sendino, Joaquim Garrabou, Javier del Campo","doi":"10.1111/1758-2229.70185","DOIUrl":"10.1111/1758-2229.70185","url":null,"abstract":"Marine heatwaves are intensifying due to global warming and increasingly drive mass mortality events in shallow benthic ecosystems. Marine invertebrates host diverse microbial communities that contribute to their health and resilience, yet microbiome responses under thermal stress remain poorly characterised across most taxa. Here, we characterise the microbiome composition in colonies of the common Mediterranean bryozoan Myriapora truncata at two depths (13 and 17 m) following the extreme 2022 marine heatwave. Despite no visible necrosis, microbial communities at both depths exhibited shifts indicative of thermal stress, including the reduced presence of potential core microbial members. Colonies from the shallower, warmer depth showed higher alpha diversity and reduced abundance of key functional genera compared to deeper colonies, suggesting early dysbiosis. These results highlight that M. truncata—though visually unaffected—undergoes sublethal microbiome alterations under thermal stress. This study provides the first characterisation of a bryozoan microbiome after a marine heatwave and highlights the potential of host-associated microbial communities as early bioindicators of invertebrate stress in a warming ocean.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144935187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitrogen Fixation Potential in Bathypelagic Sediment of the Ice-Covered Arctic Ocean Revealed Through Long-Term Stable Isotope Incubations 通过长期稳定同位素孵育揭示北冰洋深海沉积物的固氮潜力

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-04 DOI: 10.1111/1758-2229.70173

Lisa W. von Friesen, Carolin R. Löscher, Stefan Bertilsson, Hanna Farnelid, Pauline Snoeijs-Leijonmalm, Marcus Sundbom, Sachia J. Traving, Flor Vermassen, Lasse Riemann

{"title":"Nitrogen Fixation Potential in Bathypelagic Sediment of the Ice-Covered Arctic Ocean Revealed Through Long-Term Stable Isotope Incubations","authors":"Lisa W. von Friesen, Carolin R. Löscher, Stefan Bertilsson, Hanna Farnelid, Pauline Snoeijs-Leijonmalm, Marcus Sundbom, Sachia J. Traving, Flor Vermassen, Lasse Riemann","doi":"10.1111/1758-2229.70173","DOIUrl":"10.1111/1758-2229.70173","url":null,"abstract":"Due to climate change, sea ice more commonly retreats over the shelf breaks in the Arctic Ocean, impacting sea ice-pelagic-benthic coupling in the deeper basins. Nitrogen fixation (the reduction of dinitrogen gas to bioavailable ammonia by microorganisms called diazotrophs) is reported from Arctic shelf sediments but is unknown from the Arctic deep sea. We sampled five locations of deep-sea (900–1500 m) surface sediments in the central ice-covered Arctic Ocean to measure potential nitrogen fixation through long-term (> 280 days) stable-isotope (15N2) incubations and to study diazotroph community composition through amplicon sequencing of the functional marker gene nifH. We measured low but detectable nitrogen fixation rates at the Lomonosov Ridge (0.6 pmol N g−1 day−1) and the Morris Jessup Rise (0.4 pmol N g−1 day−1). Nitrogen fixation was observed in sediments with the lowest organic matter content and bacterial abundance, and where sulphate-reducers like Desulfuromonadia and Desulfosporosinus sp. were prominent. Most nifH genes were distantly related to known diazotrophs. In this study, we show a potential for nitrogen fixation in Arctic bathypelagic sediments, considerably extending the known biome of marine nitrogen fixation. It raises the question of the significance of low but potentially widespread nitrogen fixation in deep-sea sediments.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144935188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitrogen Fixation Potential in Bathypelagic Sediment of the Ice-Covered Arctic Ocean Revealed Through Long-Term Stable Isotope Incubations 通过长期稳定同位素孵育揭示北冰洋深海沉积物的固氮潜力

IF 2.7 4区生物学

Environmental Microbiology Reports Pub Date : 2025-09-04 DOI: 10.1111/1758-2229.70173

Lisa W. von Friesen, Carolin R. Löscher, Stefan Bertilsson, Hanna Farnelid, Pauline Snoeijs-Leijonmalm, Marcus Sundbom, Sachia J. Traving, Flor Vermassen, Lasse Riemann

{"title":"Nitrogen Fixation Potential in Bathypelagic Sediment of the Ice-Covered Arctic Ocean Revealed Through Long-Term Stable Isotope Incubations","authors":"Lisa W. von Friesen, Carolin R. Löscher, Stefan Bertilsson, Hanna Farnelid, Pauline Snoeijs-Leijonmalm, Marcus Sundbom, Sachia J. Traving, Flor Vermassen, Lasse Riemann","doi":"10.1111/1758-2229.70173","DOIUrl":"10.1111/1758-2229.70173","url":null,"abstract":"Due to climate change, sea ice more commonly retreats over the shelf breaks in the Arctic Ocean, impacting sea ice-pelagic-benthic coupling in the deeper basins. Nitrogen fixation (the reduction of dinitrogen gas to bioavailable ammonia by microorganisms called diazotrophs) is reported from Arctic shelf sediments but is unknown from the Arctic deep sea. We sampled five locations of deep-sea (900–1500 m) surface sediments in the central ice-covered Arctic Ocean to measure potential nitrogen fixation through long-term (> 280 days) stable-isotope (15N2) incubations and to study diazotroph community composition through amplicon sequencing of the functional marker gene nifH. We measured low but detectable nitrogen fixation rates at the Lomonosov Ridge (0.6 pmol N g−1 day−1) and the Morris Jessup Rise (0.4 pmol N g−1 day−1). Nitrogen fixation was observed in sediments with the lowest organic matter content and bacterial abundance, and where sulphate-reducers like Desulfuromonadia and Desulfosporosinus sp. were prominent. Most nifH genes were distantly related to known diazotrophs. In this study, we show a potential for nitrogen fixation in Arctic bathypelagic sediments, considerably extending the known biome of marine nitrogen fixation. It raises the question of the significance of low but potentially widespread nitrogen fixation in deep-sea sediments.","PeriodicalId":163,"journal":{"name":"Environmental Microbiology Reports","volume":"17 5","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://enviromicro-journals.onlinelibrary.wiley.com/doi/epdf/10.1111/1758-2229.70173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144935234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0