Environmental microbiology最新文献_第3页

Sediments From a Seasonally Euxinic Coastal Ecosystem Show High Nitrogen Cycling Potential 季节性富氧海岸生态系统沉积物显示出高氮循环潜力

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70139

Isabel M. L. Rigutto, Ştefania C. Sburlan, Lars W. P. de Bont, Tom Berben, Rob M. de Graaf, Caroline P. Slomp, Mike S. M. Jetten

{"title":"Sediments From a Seasonally Euxinic Coastal Ecosystem Show High Nitrogen Cycling Potential","authors":"Isabel M. L. Rigutto, Ştefania C. Sburlan, Lars W. P. de Bont, Tom Berben, Rob M. de Graaf, Caroline P. Slomp, Mike S. M. Jetten","doi":"10.1111/1462-2920.70139","DOIUrl":"https://doi.org/10.1111/1462-2920.70139","url":null,"abstract":"Coastal ecosystems are susceptible to eutrophication and deoxygenation, which may alter their nitrogen cycle dynamics. Here, we investigated the microbial nitrogen cycling potential in the sediment of a seasonally euxinic coastal ecosystem (Lake Grevelingen, NL) in winter and summer. Activity tests revealed ammonium (NH4+) oxidation potential with maximum potential rates up to 53 μmol g−1 day−1, even in anoxic sediment layers. A nitrifying microbial community was present in both oxic and anoxic sediment sections (up to 1.4% relative abundance). Nitrate (NO3−), nitrite (NO2−), and nitrous oxide (N2O) reduction potential were prominent across all sediment sections, with the highest potential rates (167 μmol NO3−∙g−1 day−1) in the surface sediment in summer. Denitrification (79.3%–98.4%) and dissimilatory nitrate reduction to ammonium (DNRA; 1.6%–20.7%) were the major NO3− removal pathways, as supported by the detection of the narG/napA, nirK/nirS, norB, nosZ and nrfA/otr genes in all sediment sections. The DNRA contribution increased with depth and with the addition of electron donors, such as monomethylamine. Anaerobic ammonium oxidation (anammox) was not detected in these eutrophic sediments. Combined, our results show that there is high potential for nitrogen removal in eutrophic coastal ecosystems, which may help further restoration measures.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Molecular Insight Into the Hydrolysis of Phthalate Esters by a Family IV Esterase 一类酯酶水解邻苯二甲酸酯的分子研究

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70134

Zhen Rong, Li-Guo Hong, Ying-Yi Huo, Jixi Li, Dao-Qiong Zheng, Yang Ha, Jeffrey Fan, Xue-Wei Xu, Yue-Hong Wu

{"title":"Molecular Insight Into the Hydrolysis of Phthalate Esters by a Family IV Esterase","authors":"Zhen Rong, Li-Guo Hong, Ying-Yi Huo, Jixi Li, Dao-Qiong Zheng, Yang Ha, Jeffrey Fan, Xue-Wei Xu, Yue-Hong Wu","doi":"10.1111/1462-2920.70134","DOIUrl":"https://doi.org/10.1111/1462-2920.70134","url":null,"abstract":"<div>\u0000 \u0000 Phthalate esters (PAEs) are prevalent environmental contaminants, with their biodegradation efficiently driven by microorganisms through ester bond hydrolysis. This study investigates the mechanism of Poc14, a novel family IV esterase, using x-ray crystallography, bioinformatics, biochemistry and site-directed mutagenesis. Phylogenetic analysis classifies Poc14 as a family IV esterase with conserved catalytic motifs crucial for its activity. Poc14 retains over 80% activity at 50°C for 4 h and tolerates up to 5% methanol or DMF, though surfactants like Tweens inhibit its function. Poc14 activity is independent of metal ions, and the addition of EDTA further enhances its activity by approximately 130%. The 1.8 Å crystal structure reveals a CAP domain and two substrate channels. Enzyme assays show Poc14 hydrolyses short-chain diethyl phthalate (DEP) (Km = 0.068 mM, Vmax = 9975 μM/min/mg) but not long-chain di(2-ethylhexyl) phthalate (DEHP) due to steric hindrance. Molecular docking assessed Poc14's potential to hydrolyse DEP and DEHP after residue mutations, resulting in the Poc14-AAG variant. Poc14-AAG could hydrolyse one bond of DEHP and diester bonds of DEP. Our study positions Poc14 as a promising enzyme for environmental remediation, with potential for optimising DEHP degradation and exploring dimerisation effects.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skin Bacteriome Structure and Batrachochytrium dendrobatidis Prevalence Differs Amongst Two Sympatric Salamanders in the San Francisco Bay Area 旧金山湾区两种同域蝾螈皮肤菌群结构和树突壶菌流行率的差异

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70131

Aria Norwood, Jadyn Jamora, Micuel Madison, Jamiee Nguyen, Azan Yousaf, Katya Morales, Emily Vu, Obed Hernández-Gómez

{"title":"Skin Bacteriome Structure and Batrachochytrium dendrobatidis Prevalence Differs Amongst Two Sympatric Salamanders in the San Francisco Bay Area","authors":"Aria Norwood, Jadyn Jamora, Micuel Madison, Jamiee Nguyen, Azan Yousaf, Katya Morales, Emily Vu, Obed Hernández-Gómez","doi":"10.1111/1462-2920.70131","DOIUrl":"https://doi.org/10.1111/1462-2920.70131","url":null,"abstract":"<div>\u0000 \u0000 Microbial surveys are becoming an important component of wildlife health research, especially in cases where environmental change and infectious diseases are serious issues. Amongst amphibians, Batrachochytrium spp. have the potential to be fatal pathogens that can impact the population health of numerous species. We assessed the skin bacteriome, prevalence of Batrachochytrium dendrobatidis (Bd) and body conditions of two salamander genera with different life histories: the California slender salamander (Batrachoseps attenuatus) and members of the Pacific newt species complex (Taricha torosa and Taricha granulosa; Taricha sp.). We used 16S rRNA V4 amplicon sequencing to characterise the bacterial communities. Taricha sp. had higher prevalence and loads of Bd compared to B. attenuatus, although the prevalence of Bd was restricted to two of the four regions tested. Both salamander types possessed similar bacterial community richness, and the composition of the skin bacteriome varied mostly by region. However, we did find certain associations between the salamander genera and certain ASVs, with mostly members of the family Burkholderiaceae driving the difference. Our results provide additional evidence for the presence of structure in Bd prevalence and bacteriome composition amongst sympatric amphibians that inhabit different microhabitats.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Larval and Adult Female Gut Microbiomes of Two Burying Beetles (Nicrophorus spp.) With Distinct Parental Care Traits 两种具有不同亲代抚育特征的埋虫幼虫和成虫肠道微生物组

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70137

Paul A. Ayayee, Bincy Sunny, Kristi L. Montooth, Claudia M. Rauter

{"title":"The Larval and Adult Female Gut Microbiomes of Two Burying Beetles (Nicrophorus spp.) With Distinct Parental Care Traits","authors":"Paul A. Ayayee, Bincy Sunny, Kristi L. Montooth, Claudia M. Rauter","doi":"10.1111/1462-2920.70137","DOIUrl":"https://doi.org/10.1111/1462-2920.70137","url":null,"abstract":"Burying beetles (Nicrophorus spp.) exhibit parental care behaviours well-suited for studying gut microbiome and holobiont evolution. Theory predicts that differences in transmission can contribute to gut microbiome variations. We show that microbiome diversity estimates were comparable between reproductive females of common-garden-reared colonies of Nicrophorus marginatus (facultative parental care) and Nicrophorus orbicollis (obligate parental care). In contrast, the respective associated larvae of both species differed significantly. Furthermore, larval microbiomes clustered with respective adult female microbiomes but differed from each other. Fifteen bacterial families underscored differences in community composition between beetle species, with Wohlfahrtiimonadaceae significantly more abundant in N. orbicollis than N. marginatus. Results suggest that differences in parental transmission (trophallaxis) and larval acquisition of microbes possibly impact the parental-offspring gut microbiome dynamic. Close association of parental and larval microbiomes in the facultative parental care species is attributed to environmental acquisition from prepared carcasses and limited trophallaxis in larvae. However, the distinct larval and parental microbiomes in the obligate parental care species are attributed to the selective sorting of functionally relevant microbes from parents in larvae. Further examination of this genus's parental care behaviours and gut microbiome dynamics may offer insight into the possible evolutionary and ecological implications and general outcomes.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Saprotrophic Capabilities of Neurospora crassa on Charred Plant Biomass 粗草神经孢子虫对烧焦植物生物量腐养能力的研究

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-24 DOI: 10.1111/1462-2920.70132

Hunter J. Simpson, Jonathan S. Schilling

{"title":"Saprotrophic Capabilities of Neurospora crassa on Charred Plant Biomass","authors":"Hunter J. Simpson, Jonathan S. Schilling","doi":"10.1111/1462-2920.70132","DOIUrl":"https://doi.org/10.1111/1462-2920.70132","url":null,"abstract":"Neurospora crassa is a popular model organism for laboratory research, yet its natural ecology remains mysterious. Its proliferation on charred plant biomass (wood and grasses) in fire-affected environments is often linked to the heat tolerance or heat−/chemical-induced germination of N. crassa spores; however, this link is not consistent across ecosystems or substrate types. Another possible, yet unvalidated, explanation is that N. crassa has an enhanced capacity for degrading charred (i.e., pyrolyzed) plant biomass. We assessed this adaptation for N. crassa by quantifying the decay of wood and grasses that were pyrolyzed to relevant extents (untreated, heated at 225°C or 350°C for 20 min) and by comparing this decay with non-fire-associated fungi. Neurospora crassa did not have an enhanced ability to degrade pyrolyzed substrates. Additionally, N. crassa struggled to degrade any wood substrate (< 6% mass loss) but did degrade untreated grasses (> 20% mass loss). These results, paired with chemical analyses of substrates pre- and post-decay, support a fire-response strategy for N. crassa, rather than a fire-adaptive ability to degrade charred substrates. This fungus likely proliferates on charred biomass by rapidly colonising heat-sterilised substrates after heat- or smoke-induced spore germination and then consuming unpyrolyzed lignocellulose beneath a charred exterior.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

New Insights Into Epiphytic Biofilm Formation, Composition, and Their Role in Submerged Macrophyte Decline Under Environmental Pollution 附生生物膜的形成、组成及其在环境污染下沉水植物衰退中的作用的新认识

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-24 DOI: 10.1111/1462-2920.70121

Jiaqing Xu, Juan Pablo Pacheco Esnal, Ling Jin, Qihang Wu, Changqun Duan, Ying Pan, Torben L. Lauridsen

{"title":"New Insights Into Epiphytic Biofilm Formation, Composition, and Their Role in Submerged Macrophyte Decline Under Environmental Pollution","authors":"Jiaqing Xu, Juan Pablo Pacheco Esnal, Ling Jin, Qihang Wu, Changqun Duan, Ying Pan, Torben L. Lauridsen","doi":"10.1111/1462-2920.70121","DOIUrl":"https://doi.org/10.1111/1462-2920.70121","url":null,"abstract":"Over evolutionary time, submerged macrophytes and their epiphytic biofilms have developed complex interactions, particularly mutualistic interactions. However, environmental pollution can alter biofilms, potentially shifting their influence from supportive to neutral or even inhibitory. This change may be one of the significant driving factors for the decline of submerged macrophytes, yet a systematic review of this phenomenon is still lacking. To this end, we examine the formation and composition of epiphytic biofilms, summarize their effects on submerged macrophyte growth in freshwater lakes, and discuss how they mediate plant changes under increasing exposure to environmental pollution. Epiphytic biofilms, composed of complex biotic and abiotic components, influence submerged macrophytes by modifying light conditions and gas exchange, modulating nutrient competition and antioxidant responses, and releasing allelopathic substances; the magnitude of these effects varies with the biofilm's composition. Environmental pollution might favor resistant or fast-growing species that better compete for nutrients, impair light capture and gas exchange, and release harmful allelopathic substances. This diminishes the beneficial effects of epiphytic biofilms on submerged macrophytes, sometimes even resulting in detrimental impacts. This review examines how environmental pollution alters epiphytic biofilm composition and influences submerged macrophyte communities, providing novel insights into the dynamics of submerged macrophyte communities.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Phytoplankton Exhibit Diverse Responses to Different Phases of Upwelling in the California Current System 浮游植物对加利福尼亚洋流系统中不同阶段的上升流表现出不同的反应

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-24 DOI: 10.1111/1462-2920.70130

Yuan Yu Lin, Olivia Torano, Emily Pierce, Claire Till, Matthew Hurst, Astrid Schnetzer, Harvey Seim, Adrian Marchetti

{"title":"Phytoplankton Exhibit Diverse Responses to Different Phases of Upwelling in the California Current System","authors":"Yuan Yu Lin, Olivia Torano, Emily Pierce, Claire Till, Matthew Hurst, Astrid Schnetzer, Harvey Seim, Adrian Marchetti","doi":"10.1111/1462-2920.70130","DOIUrl":"https://doi.org/10.1111/1462-2920.70130","url":null,"abstract":"<div>\u0000 \u0000 Eastern boundary upwelling currents are some of the most biologically productive and diverse regions in the world's oceans. Driven by equatorward winds and Ekman transport, surface waters are transported offshore and replaced by cold, nutrient-rich deep waters that seed extensive phytoplankton blooms. Studying phytoplankton community succession and physiological acclimation during the initial stages of upwelling is critical to building a comprehensive understanding of phytoplankton responses to upwelling in these important regions. Additionally, factors like lateral transport, seed population dynamics and physiological and molecular shifts are conducive to shaping the community assemblage and primary productivity. This study examines how phytoplankton gene expression and resulting physiology change between early and later phases of upwelling. By incorporating metatranscriptomic analyses and stable isotope incubations to measure nutrient uptake kinetics into our assessment of early and later upwelling stages, we observed variability in phytoplankton assemblages and differential gene expression of phytoplankton that were de-coupled from their physiology. We show that the gene expression response to a fresh upwelling event precedes their physiological response. Ultimately, understanding how phytoplankton change through the course of an upwelling event is critical to assessing their importance to regional biological rate processes, trophic systems and resulting biogeochemistry.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expanded Diversity of Microbial Groups Capable of Anaerobic Pyrite Reduction and Assimilation of Dissolution Products 能够厌氧硫铁矿还原和溶解产物同化的微生物群的扩大多样性

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-22 DOI: 10.1111/1462-2920.70125

Eric S. Boyd, Devon Payne

{"title":"Expanded Diversity of Microbial Groups Capable of Anaerobic Pyrite Reduction and Assimilation of Dissolution Products","authors":"Eric S. Boyd, Devon Payne","doi":"10.1111/1462-2920.70125","DOIUrl":"https://doi.org/10.1111/1462-2920.70125","url":null,"abstract":"Pyrite, the most abundant iron sulfide mineral in the Earth's crust, has traditionally been considered as a sink for iron and sulfur in the absence of oxygen. Recent research, however, has shown that anaerobic methanogenic archaea can reductively dissolve pyrite and assimilate its products as sources of iron and sulfur. This study explores whether other anaerobic bacteria, including fermentative, nitrate-, iron oxide-, fumarate-, and sulfate-respiring bacteria, can also reduce pyrite and use its dissolution products as sources of iron and sulfur. Results indicate that heterotrophic bacteria respiring fumarate or sulfate, or fermenting organic carbon, can reduce pyrite and assimilate released iron and sulfur. In contrast, nitrate- or iron oxide-respiring cells did not reduce pyrite, suggesting that microbial pyrite reduction is metabolism-specific. All strains capable of reducing pyrite could also use mackinawite as an iron and sulfur source. With the exception of fermentative Bacteroides, strains did not require direct contact with pyrite to reduce the mineral, indicating extracellular electron transfer via electron shuttles. These findings expand the known diversity of microbial groups capable of pyrite reduction and highlight the mineral's lability in various anaerobic environments, with potential implications for the biogeochemical cycles of iron, sulfur, carbon, and oxygen.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Unravelling Biodiversity, Assembly Mechanisms and Coexistence Patterns of Abundant and Rare Microeukaryotes in Water and Sediment: New Insights From Volcanic Lakes in Arxan Geopark 水体和沉积物中丰富和稀有微真核生物的生物多样性、组装机制和共存模式：来自Arxan地质公园火山湖的新见解

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-22 DOI: 10.1111/1462-2920.70129

Zhen Shen, Jianying Chao, Xingchen Li, Shuo Li, Dunping Sun, Jian Li, Yi Gong, Keqiang Shao, Zhijun Gong, Xiangming Tang

{"title":"Unravelling Biodiversity, Assembly Mechanisms and Coexistence Patterns of Abundant and Rare Microeukaryotes in Water and Sediment: New Insights From Volcanic Lakes in Arxan Geopark","authors":"Zhen Shen, Jianying Chao, Xingchen Li, Shuo Li, Dunping Sun, Jian Li, Yi Gong, Keqiang Shao, Zhijun Gong, Xiangming Tang","doi":"10.1111/1462-2920.70129","DOIUrl":"https://doi.org/10.1111/1462-2920.70129","url":null,"abstract":"<div>\u0000 \u0000 Volcanic lakes are unique ecosystems often characterised by distinct physicochemical conditions that shape microbial biodiversity and community dynamics. However, the ecological roles, biodiversity, coexistence patterns, and assembly mechanisms of abundant and rare microeukaryotic biospheres in these environments remain poorly understood. Here, we investigated their distinct patterns in water and sediment from volcanic lakes in Arxan Geopark, China. Our findings demonstrated that sediment harboured significantly higher microbial biodiversity than water, with rare microeukaryotes exhibiting greater diversity than abundant microeukaryotes in both habitats. In sediment, biodiversity was predominantly driven by water content (WC) and total phosphorus (TP), whereas in water, temperature, pH, TP and loss on ignition (LOI) played pivotal roles. Abundant biosphere contributed more to community stability, while rare biosphere showed greater sensitivity to environmental fluctuations. Community assembly processes also varied: water communities were shaped by drift (DR), dispersal limitation (DL) and homogeneous selection (HoS), while sediment communities were predominantly governed by DL and DR. Abundant biosphere was predominantly influenced by stochastic processes, while rare biosphere showed greater sensitivity to both deterministic and stochastic processes. These results highlight the distinct contributions of abundant and rare biospheres to community dynamics and stability, emphasising the importance of environmental context in shaping microbial interactions.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbial Communities Drive Methane Fluxes From Floodplain Lakes—A Hydrological Gradient Perspective 微生物群落驱动河漫滩湖泊的甲烷通量——水文梯度视角

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-22 DOI: 10.1111/1462-2920.70127

Sylwia Lew, Paweł Burandt, Katarzyna Glińska-Lewczuk

{"title":"Microbial Communities Drive Methane Fluxes From Floodplain Lakes—A Hydrological Gradient Perspective","authors":"Sylwia Lew, Paweł Burandt, Katarzyna Glińska-Lewczuk","doi":"10.1111/1462-2920.70127","DOIUrl":"https://doi.org/10.1111/1462-2920.70127","url":null,"abstract":"This study examined the impact of methanotrophic bacteria and methanogenic archaea on CH4 fluxes from floodplain lakes at various successional stages, analysing their interactions with physicochemical properties of water. Seasonal microbiological and hydrochemical studies of 10 floodplain lakes in the Łyna River floodplain, characterised by varying hydrological connectivity, revealed that methanotrophic bacteria (MOB) and mGen significantly influenced CH4 and CO2 emissions. The microbial structure, expressed as the MOB/mGen ratio, was associated with a gradient of CH4 flux rates specific to each oxbow type. Average CH4 fluxes from the lakes were 21, 225 and 507 mg m−2 day−1 for lotic, semi-lotic and lentic systems, respectively, while corresponding CO2 fluxes were 0.8, 0.7 and 1.0 g CO2 m−2 day−1, respectively. Statistically significant differences in CH4 and CO2 fluxes were observed between lentic and lotic water bodies. The partial least squares model indicated that water temperature significantly stimulated MOB and mGen abundances. Moreover, chlorophyll-a, turbidity and chemical oxygen demand positively correlated with the presence of these microbial groups. Methanotrophs were negatively affected by NH4–N, while methanogens were affected by NO3–N. These findings highlight the complex biotic and abiotic interactions driving greenhouse gas emissions in floodplain ecosystems and suggest targeted management strategies to mitigate their climate impacts.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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