FEMS microbiology ecology最新文献_第2页

Microbial community structure is affected by phage-resistance associated increases in host density. 微生物群落结构受到与噬菌体抗性相关的宿主密度增加的影响。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiaf027

Meaghan Castledine, Daniel Padfield, Rai Lewis, Angus Buckling

引用次数: 0

Particle-attached bacterial communities are more susceptible to seasonal environmental fluctuations in mesotrophic than eutrophic tropical reservoirs. 与富营养化的热带水库相比，颗粒附着细菌群落更容易受到季节性环境波动的影响。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiae154

Jingyi Xiao, Sijia Hao, Li-Juan Xiao, Yang Yang, Qinglong L Wu, Dan He, Lijun Zhou, Ren Hu, Lijuan Ren

{"title":"Particle-attached bacterial communities are more susceptible to seasonal environmental fluctuations in mesotrophic than eutrophic tropical reservoirs.","authors":"Jingyi Xiao, Sijia Hao, Li-Juan Xiao, Yang Yang, Qinglong L Wu, Dan He, Lijun Zhou, Ren Hu, Lijuan Ren","doi":"10.1093/femsec/fiae154","DOIUrl":"10.1093/femsec/fiae154","url":null,"abstract":"Particle-attached bacterial (PAB) communities play pivotal roles in water organic matter decomposition, nutrient cycling, and the natural self-purification processes. However, we know little about their responses to seasonal environmental fluctuations, under eutrophication in reservoir ecosystems. In this study, we studied the shifts of PAB communities to seasonal environmental fluctuations in tropical China. Trophic state index (TSI) indicated that the studied reservoirs ranged from mesotrophic to eutrophic state with a gradual increase in TSI from 31 to 58. In eutrophic reservoirs, Cyanobacteria, especially Raphidiopsis raciborskii, significantly increased in its relative abundance from the wet to dry season, but Synechococcales and Microcystaceae decreased. In contrast, the relative abundance of Clostridia, Bacilli, Coriobacteriia, Enterobacteriales, and Vibrionales were more susceptible to seasonal environmental fluctuations in mesotrophic than eutrophic reservoirs. PAB co-occurrence relationships in mesotrophic reservoirs varied more greatly in response to seasonal environmental fluctuations, compared with eutrophic reservoirs, in terms of topological properties of connectedness, average degree, robustness, and vulnerability. Our results further demonstrated that the seasonal stability of PAB co-occurrence relationships was strongly correlative with TSI through mediating key bacterial taxa and community biodiversity. We proposed that eutrophication dramatically reduced the seasonal variation of PAB community compositions and co-occurring relationships in reservoir ecosystems.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11925149/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142603871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Assessing the potential for non-digestible carbohydrates toward mitigating adverse effects of antibiotics on microbiota composition and activity in an in vitro colon model of the weaning infant. 在断奶婴儿体外结肠模型中评估不可消化碳水化合物对减轻抗生素对微生物群组成和活性的不利影响的潜力。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiaf028

Martha F Endika, David J M Barnett, Emiliana M Olmos, Cajo J F Ter Braak, Ilja C W Arts, John Penders, Arjen Nauta, Hans Leemhuis, Koen Venema, Hauke Smidt

{"title":"Assessing the potential for non-digestible carbohydrates toward mitigating adverse effects of antibiotics on microbiota composition and activity in an in vitro colon model of the weaning infant.","authors":"Martha F Endika, David J M Barnett, Emiliana M Olmos, Cajo J F Ter Braak, Ilja C W Arts, John Penders, Arjen Nauta, Hans Leemhuis, Koen Venema, Hauke Smidt","doi":"10.1093/femsec/fiaf028","DOIUrl":"10.1093/femsec/fiaf028","url":null,"abstract":"Environmental factors like diet and antibiotics modulate the gut microbiota in early life. During weaning, gut microbiota progressively diversifies through exposure to non-digestible carbohydrates (NDCs) from diet, while antibiotic perturbations might disrupt this process. Supplementing an infant's diet with prebiotic NDCs may mitigate the adverse effects of antibiotics on gut microbiota development. This study evaluated the influence of supplementation with 2-fucosyllactose (2'-FL), galacto-oligosaccharides (GOS), or isomalto/malto-polysaccharides containing 87% of α(1→6) linkages (IMMP-87), on the recovery of antibiotic-perturbed microbiota. The TIM-2 in vitro colon model inoculated with fecal microbiota of 9-month-old infants was used to simulate the colon of weaning infants exposed to the antibiotics amoxicillin/clavulanate or azithromycin. Both antibiotics induced changes in microbiota composition, with no signs of recovery in azithromycin-treated microbiota within 72 h. Moreover, antibiotic exposure affected microbiota activity, indicated by a low valerate production, and azithromycin treatment was associated with increased succinate production. The IMMP-87 supplementation promoted the compositional recovery of amoxicillin/clavulanate-perturbed microbiota, associated with the recovery of Ruminococcus, Ruminococcus gauvreauii group, and Holdemanella. NDC supplementation did not influence compositional recovery of azithromycin-treated microbiota. Irrespective of antibiotic exposure, supplementation with 2'-FL, GOS, or IMMP-87 enhanced microbiota activity by increasing short-chain fatty acids production (acetate, propionate, and butyrate).","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11963755/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143669151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Spatio-temporal dynamics of bacterial community composition in a Western European watershed, the Meuse River watershed. 西欧默兹河流域细菌群落组成的时空动态。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiaf022

Valentin Barberoux, Adriana Anzil, Loïc Meinertzhagen, Thanh Nguyen-Dinh, Pierre Servais, Isabelle F George

{"title":"Spatio-temporal dynamics of bacterial community composition in a Western European watershed, the Meuse River watershed.","authors":"Valentin Barberoux, Adriana Anzil, Loïc Meinertzhagen, Thanh Nguyen-Dinh, Pierre Servais, Isabelle F George","doi":"10.1093/femsec/fiaf022","DOIUrl":"10.1093/femsec/fiaf022","url":null,"abstract":"This study aimed to identify factors influencing bacterial diversity in the Meuse River watershed by analyzing 42 locations sampled in spring and summer 2019, combined with biweekly sampling of one mid-stream location for a year. Bacterial community composition (BCC) was assessed in the small (SF; <5 µm) and large fractions (LF; ≥5 µm,), alongside physico-chemical parameters. LF consistently exhibited greater alpha diversity than SF. During the spatial campaigns, alpha diversity increased downstream in spring with high discharge, and BCC differed significantly between headwaters and the main river. Along this axis, several genera, Flavobacterium, Limnohabitans, and Aquirufa stood out as indicators of good water quality. Rhodoferax, another taxon indicative of good water quality, prevailed in the headwaters and during winter. In contrast, two cyanobacteria genera indicators of poor river quality, Microcystis PCC 7914 and Cyanobium PCC 6307, peaked in summer. BCC in spring and summer temporal samples aligned with spatial ones, while winter and autumn samples had distinct BCC. Finally, season, temperature, and distance from river mouth were the main driving parameters of beta diversity, outweighing the effect of fraction size on the BCC. These findings reinforce the notion that local conditions exert significant influence on bacterial communities in rivers.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11916896/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143566530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Plipastatin is a shared good by Bacillus subtilis during combating Fusarium spp. Plipastatin是枯草芽孢杆菌与镰刀菌的共同产物。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiaf020

Rune Overlund Stannius, Ákos T Kovács

{"title":"Plipastatin is a shared good by Bacillus subtilis during combating Fusarium spp.","authors":"Rune Overlund Stannius, Ákos T Kovács","doi":"10.1093/femsec/fiaf020","DOIUrl":"10.1093/femsec/fiaf020","url":null,"abstract":"Bacillus subtilis a Gram-positive soil-dwelling bacterium known for its wide range of bioactive secondary metabolites. The lipopeptide plipastatin produced by most B. subtilis isolates have been shown to exhibit potent antifungal activity against plant pathogenic fungi. While the effect of these antifungal compounds are well studied in the context of biocontrol, much less is known of their role in the environment, which also harbor nonproducing strains of these compounds. Fusarium species produce multiple antibacterial compounds resulting in dysbiosis of the plant-associated microbiome and inhibition of plant beneficial bacteria like B. subtilis. While plipastatin is expected to be important for survival of B. subtilis, not all isolates carry the biosynthetic gene cluster for plipastatin suggesting that the protective effect of plipastatin might be shared. In this study, we investigated the protective effect of plipastatin against Fusarium oxysporum in a coculture using a producer and a nonproducer isolate of plipastatin. We tested the survival of single and cocultured strains under Fusarium challenge in liquid media and solid agar plates to dissect the influence of spatial structure. Our results highlights that plipastatin protects the nonproducer strain in a density-dependent manner.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11916886/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Insights into the phylogenetic and metabolic diversity of Planctomycetota in anaerobic digesters and the isolation of novel Thermoguttaceae species. 厌氧消化池中植物菌门的系统发育和代谢多样性及热菌科新物种的分离。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-03-18 DOI: 10.1093/femsec/fiaf025

Dominika Klimek, Malte Herold, Inês Rosado Vitorino, Zuzana Dedova, Sebastien Lemaigre, Jimmy Roussel, Xavier Goux, Olga Maria Lage, Magdalena Calusinska

{"title":"Insights into the phylogenetic and metabolic diversity of Planctomycetota in anaerobic digesters and the isolation of novel Thermoguttaceae species.","authors":"Dominika Klimek, Malte Herold, Inês Rosado Vitorino, Zuzana Dedova, Sebastien Lemaigre, Jimmy Roussel, Xavier Goux, Olga Maria Lage, Magdalena Calusinska","doi":"10.1093/femsec/fiaf025","DOIUrl":"10.1093/femsec/fiaf025","url":null,"abstract":"Studying bacteria in anaerobic digestion (AD) is crucial for optimizing microbial processes. While abundant taxa are often studied, less abundant groups may harbour novel metabolic potential. This study fills the gap by focusing on the Planctomycetota phylum, known to encode diverse carbohydrate-active enzymes (CAZymes). Despite their common presence in diverse aerobic and anaerobic environments, their role in AD is relatively unexplored. We utilized both culture-dependent and culture-independent techniques to investigate the phylogenetic and metabolic diversity of Planctomycetota within AD reactors. Our findings revealed that among the diverse planctomycetotal operational taxonomic units present, only a few are prevalent and abundant community members. Planctomycetota share functional traits with e.g. Verrucomicrobiota exhibiting distinct CAZyme gene repertoires that indicates specialization in degrading algal polysaccharides and glycoproteins. To explore the planctomycetotal metabolic capabilities, we monitored their presence in algal-fed digesters. Additionally, we isolated a strain from mucin-based medium, revealing its genetic potential for a mixotrophic lifestyle. Based on the genomic analysis, we propose to introduce the Candidatus Luxemburgiella decessa gen. nov. sp. nov., belonging to the Thermoguttaceae family within the Pirellulales order of the Planctomycetia class. This study enhances our understanding of Planctomycetota in AD by highlighting their phylogenetic diversity and metabolic capabilities.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11929135/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143647864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Multi-omics analysis of the correlation between surface microbiome and metabolome in Saccharina latissima (Laminariales, Phaeophyceae). 糖藻表面微生物组与代谢组相关性的多组学分析。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-02-20 DOI: 10.1093/femsec/fiae160

Emilie Adouane, Cédric Hubas, Catherine Leblanc, Raphaël Lami, Soizic Prado

{"title":"Multi-omics analysis of the correlation between surface microbiome and metabolome in Saccharina latissima (Laminariales, Phaeophyceae).","authors":"Emilie Adouane, Cédric Hubas, Catherine Leblanc, Raphaël Lami, Soizic Prado","doi":"10.1093/femsec/fiae160","DOIUrl":"10.1093/femsec/fiae160","url":null,"abstract":"The microbiome of Saccharina latissima, an important brown macroalgal species in Europe, significantly influences its health, fitness, and pathogen resistance. Yet, comprehensive studies on the diversity and function of microbial communities (bacteria, eukaryotes, and fungi) associated with this species are lacking. Using metabarcoding, we investigated the epimicrobiota of S. latissima and correlated microbial diversity with metabolomic patterns (liquid chromatography coupled to tandem mass spectrometry). Specific epibacterial and eukaryotic communities inhabit the S. latissima surface, alongside a core microbiota, while fungal communities show lower and more heterogeneous diversity. Metabolomic analysis revealed a large diversity of mass features, including putatively annotated fatty acids, amino derivatives, amino acids, and naphthofurans. Multiple-factor analysis linked microbial diversity with surface metabolome variations, driven mainly by fungi and bacteria. Two taxa groups were identified: one associated with bacterial consortia and the other with fungal consortia, each correlated with specific metabolites. This study demonstrated a core bacterial and eukaryotic microbiota associated with a core metabolome and highlighted interindividual variations. Annotating the surface metabolome using Natural Products databases suggested numerous metabolites potentially involved in interspecies chemical interactions. Our findings establish a link between microbial community structure and function, identifying two microbial consortia potentially involved in the chemical defense of S. latissima.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11879540/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Bark beetle infestation alters mycobiomes in wood, litter, and soil associated with Norway spruce. 树皮甲虫侵染改变了与挪威云杉有关的木材、凋落物和土壤中的真菌群落。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-02-20 DOI: 10.1093/femsec/fiaf015

Diana Masch, François Buscot, Wolfgang Rohe, Kezia Goldmann

{"title":"Bark beetle infestation alters mycobiomes in wood, litter, and soil associated with Norway spruce.","authors":"Diana Masch, François Buscot, Wolfgang Rohe, Kezia Goldmann","doi":"10.1093/femsec/fiaf015","DOIUrl":"10.1093/femsec/fiaf015","url":null,"abstract":"Recent exceptionally hot and dry summers provoked massive bark beetle outbreaks in German forests, which killed many conifers, forcing to clear-cut complete non-mature stands. The importance of fungi in ecosystems in particular in association with trees is widely recognized, but the ecology of how insect infestations of trees affect their mycobiomes remains poorly understood. Using Illumina MiSeq sequencing, we investigated fungal communities in soil, litter, and stem wood at early and late stages of bark beetle infestation in a Norway spruce [Picea abies (L.) Karst] stand in Central Germany. Fungal diversity decreased from soil to wood, with the highest proportion of unknown fungi in stem wood. Lifestyles, particularly of those fungi associated with stem wood, clearly changed depending on the infestation stage. The answer of tree-associated fungi to beetle infestation was characterized by an increasing community dissimilarity among all three habitats, i.e. it concerned not only the above-ground fungal communities directly connected to the tree. Our study, thus, pinpoints the cascading effects of tree infestations by bark beetles and subsequent tree diebacks on the proximate and distant mycobiomes of the plant soil system, which should be entirely considered to tackle the effects of environmental events on tree health.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11840958/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Rhizosphere microbiome influence on tomato growth under low-nutrient settings. 低营养条件下根际微生物群对番茄生长的影响

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-02-20 DOI: 10.1093/femsec/fiaf019

Gerardo Mejia, Angélica Jara-Servin, Cristóbal Hernández-Álvarez, Luis Romero-Chora, Mariana Peimbert, Rocío Cruz-Ortega, Luis D Alcaraz

{"title":"Rhizosphere microbiome influence on tomato growth under low-nutrient settings.","authors":"Gerardo Mejia, Angélica Jara-Servin, Cristóbal Hernández-Álvarez, Luis Romero-Chora, Mariana Peimbert, Rocío Cruz-Ortega, Luis D Alcaraz","doi":"10.1093/femsec/fiaf019","DOIUrl":"10.1093/femsec/fiaf019","url":null,"abstract":"Studies have suggested that reduced nutrient availability enhances microbial diversity around plant roots, positively impacting plant productivity. However, the specific contributions of rhizosphere microbiomes in nutrient-poor environments still need to be better understood. This study investigates tomato (Solanum lycopersicum L.) root microbiome under low-nutrient conditions. Plants were grown in hydroponics with soil-derived microbial community inoculations. We hypothesized that nutrient limitation would increase the selection of beneficial bacterial communities, compensating for nutrient deficiencies. We identified 12 294 operational taxonomic units across treatments and controls using 16S rRNA gene sequencing. Increased plant biomass was observed in treatments compared to controls, suggesting a role for the microbiome in mitigating nutrient limitations. The relative abundance of genera such as Luteolibacter and Sphingopyxis relative abundance correlated with plant phenotypic traits (P ≤ .05), and their presence was further validated using shotgun metagenomics. We annotated 722 677 protein families and calculated a core set of 48 116 protein families shared across all treatments and assigned them into bacteria (93.7%) and eukaryota (6.2%). Within the core bacterial metagenome, we identified protein families associated with pathways involved in positive plant interactions like the nitrogen fixation. Limited nutrient availability enhanced plant productivity under controlled conditions, offering a path to reduce fertilizer use in agriculture.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11879582/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Temperature-induced changes in the relevance of viral lysis and microzooplankton grazing of Antarctic phytoplankton indicates future alterations in seasonal carbon flow. 温度引起的与病毒裂解和南极浮游植物微浮游动物放牧相关的变化预示着季节性碳流的未来变化。

IF 3.5 3区生物学

FEMS microbiology ecology Pub Date : 2025-02-20 DOI: 10.1093/femsec/fiae158

Tristan E G Biggs, Gonçalo J Piedade, Ella M Wesdorp, Michael P Meredith, Claire Evans, Corina P D Brussaard

{"title":"Temperature-induced changes in the relevance of viral lysis and microzooplankton grazing of Antarctic phytoplankton indicates future alterations in seasonal carbon flow.","authors":"Tristan E G Biggs, Gonçalo J Piedade, Ella M Wesdorp, Michael P Meredith, Claire Evans, Corina P D Brussaard","doi":"10.1093/femsec/fiae158","DOIUrl":"10.1093/femsec/fiae158","url":null,"abstract":"Phytoplankton play a pivotal role as the primary producers in polar marine ecosystems. Despite evidence suggesting that production rates and loss factors vary from year to year, and thus drive dynamic ecosystem functioning, interannual comparisons remain sparse. In this study, we examined viral lysis and microzooplankton grazing rates on Antarctic phytoplankton during two productive seasons and compared them with published data from a previous year. Higher rates of phytoplankton gross growth and total mortality during the warmer productive season suggest global warming induced increases in the magnitude of ecosystem carbon flow. Viral lysis rates appear to be relatively independent of average seasonal temperatures, whereas grazing rates were lower during the colder productive seasons (average temperature <0°C). This resulted in a greater relative impact of viral lysis on phytoplankton mortality, particularly pronounced during periods of phytoplankton accumulation. The interannual variations in phytoplankton fate are likely due to a stronger coupling between rates of viral infection and phytoplankton growth compared with grazing. Our results emphasize the importance of monitoring rates of viral lysis, specifically in combination with the size and taxonomy of the phytoplankton community. Collectively these factors determine the relative significance of the different carbon fates, and hence the ocean's efficacy as a carbon sink.","PeriodicalId":12312,"journal":{"name":"FEMS microbiology ecology","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11879551/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143440436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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