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A One Health perspective on bacterial extracellular vesicles as mediators of antimicrobial resistance spread. 细菌细胞外囊泡作为抗菌素耐药性传播介质的一个健康观点。
IF 6.1
ISME communications Pub Date : 2026-03-11 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag052
Haining Huang, Debjyoti Ghosh, Anja Worrich
{"title":"A One Health perspective on bacterial extracellular vesicles as mediators of antimicrobial resistance spread.","authors":"Haining Huang, Debjyoti Ghosh, Anja Worrich","doi":"10.1093/ismeco/ycag052","DOIUrl":"https://doi.org/10.1093/ismeco/ycag052","url":null,"abstract":"<p><p>Antimicrobial resistance (AMR) is a global health threat requiring a One Health approach across human, animal, and environmental sectors. Bacterial extracellular vesicles (BEVs), membrane-bound particles secreted by bacteria, have emerged as potential vectors of antibiotic resistance and mediators of horizontal gene transfer. Found across clinical, agricultural, and natural environments, BEVs carry resistance genes, mobile genetic elements, and virulence factors. They protect genetic cargo, function without direct cell contact, and can cross ecological boundaries more easily than whole bacteria. This review synthesises current knowledge on BEVs in AMR transmission, highlights their cross-sector potential, and identifies key research gaps. Recognising their role is essential for improving AMR surveillance and informing future mitigation strategies.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag052"},"PeriodicalIF":6.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13064641/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147679226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 and metagenomic survey of microbial carbonic anhydrase genes reveals novel clades, high diversity, and biome specificity. 微生物碳酸酐酶基因的基因组和宏基因组调查揭示了新的分支,高度多样性和生物群系特异性。
IF 6.1
ISME communications Pub Date : 2026-03-11 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag054
Mario E E Franco, Esther Singer, Simon Roux, Laura K Meredith, Jana M U'Ren
{"title":"Genomic and metagenomic survey of microbial carbonic anhydrase genes reveals novel clades, high diversity, and biome specificity.","authors":"Mario E E Franco, Esther Singer, Simon Roux, Laura K Meredith, Jana M U'Ren","doi":"10.1093/ismeco/ycag054","DOIUrl":"https://doi.org/10.1093/ismeco/ycag054","url":null,"abstract":"<p><p>Carbonic anhydrase (CA) enzymes catalyze the interconversion of carbon dioxide and bicarbonate with an efficiency exceeded only by superoxide dismutase. CA enzymes have evolved convergently in phylogenetically distant organisms, forming eight structurally unrelated classes that share physiological functions involved in photosynthesis, respiration, pH homeostasis, CO<sub>2</sub> transport, and carbonyl sulfide hydrolysis that play central roles in medicine and the environment. Here, we leverage the recent surge in publicly available genomes and metagenomes to re-examine our understanding of the abundance, diversity, and phylogenetic relationships of the three major CA classes in Bacteria/Archaea and microbial Eukaryotes (Fungi, algae). We recovered a total of 57 218 α-, β-, and γ-CA sequences from 24 184 metagenomes and genomes, including the first putative α-CA from an archaeal species. CA sequences formed 3859 protein clusters (1188 with three or more sequences). Sequences within a cluster were typically taxonomically conserved only at higher levels (i.e. Superkingdom, Phylum). When viewed within a phylogenetic framework, the majority of subclades for each CA class contained CAs representing multiple Superkingdoms, although numerous novel β-CA clades appear unique to Fungi. Queries of CA Hidden Markov models against all public metagenome and metatranscriptome datasets revealed that CA is a ubiquitous enzyme present in virtually all sampled environments. However, CA clusters that were taxonomically conserved also appeared more environment-specific, which may explain high CA diversity. This work represents an important contribution to our understanding of the evolution, diversity, and environmental distribution of an enzyme that is key to life and has broad environmental and industrial applications.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag054"},"PeriodicalIF":6.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13098186/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147791080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Migration-driven microbial adaptation and ecological spillover in birds. 鸟类迁徙驱动的微生物适应和生态溢出。
IF 6.1
ISME communications Pub Date : 2026-03-10 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag042
Amina Tufail, Tingbei Bo, Na Zhao, Jundong Duan, Jianshi Jin, Bushra Nisar Khan, Yanhua Qu, Song Gang, Lei Fumin
{"title":"Migration-driven microbial adaptation and ecological spillover in birds.","authors":"Amina Tufail, Tingbei Bo, Na Zhao, Jundong Duan, Jianshi Jin, Bushra Nisar Khan, Yanhua Qu, Song Gang, Lei Fumin","doi":"10.1093/ismeco/ycag042","DOIUrl":"https://doi.org/10.1093/ismeco/ycag042","url":null,"abstract":"<p><p>Migratory birds perform one of the most physiologically demanding feats in the animal kingdom, rapidly accumulating fat reserves and enduring extreme environmental and immunological stress. Central to their survival is the gut microbiota, a diverse assemblage of microorganisms that contributes to energy harvesting, immune modulation, and host adaptation. As birds traverse varied landscapes and feed on diverse diets, their gut microbial communities undergo marked compositional and functional shifts. These changes can optimize nutrient absorption and immune preparedness, but they may also lead to dysbiosis under conditions of stress or pathogen exposure, potentially impairing migratory performance. Importantly, migratory birds also act as mobile reservoirs of zoonotic pathogens and antimicrobial resistance genes. Stopover sites, critical refueling points along migratory routes, serve as hubs for microbial exchange between wild birds, domestic animals, and human-altered environments, thereby amplifying spillover risks. We highlight current gaps in understanding the forces that remodel the gut microbiota and mechanistic links between microbiota dynamics and migratory performance, and propose integrative research strategies involving longitudinal sampling, meta-omics, and controlled experiments. Ultimately, bird migration offers a powerful model for exploring host-microbe co-adaptation under extreme ecological pressures. Addressing these dynamics through a One Health framework is essential for biodiversity conservation, disease mitigation, and global health security.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag042"},"PeriodicalIF":6.1,"publicationDate":"2026-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13037478/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147596647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linking hydrodynamic disturbances to microeukaryote biogeography: ciliate community shifts reveal freshwater plume and seawater intrusion dynamics. 将水动力扰动与微真核生物地理学联系起来:纤毛虫群落的变化揭示了淡水羽流和海水入侵动力学。
IF 6.1
ISME communications Pub Date : 2026-03-09 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag055
Weiwei Liu, Bowen Ye, Zijun Cheng, George B McManus, Gang Li, Linbin Zhou, Dajun Qiu, Jiaxing Liu, Zhixin Ke, Kaizhi Li, Yehui Tan
{"title":"Linking hydrodynamic disturbances to microeukaryote biogeography: ciliate community shifts reveal freshwater plume and seawater intrusion dynamics.","authors":"Weiwei Liu, Bowen Ye, Zijun Cheng, George B McManus, Gang Li, Linbin Zhou, Dajun Qiu, Jiaxing Liu, Zhixin Ke, Kaizhi Li, Yehui Tan","doi":"10.1093/ismeco/ycag055","DOIUrl":"https://doi.org/10.1093/ismeco/ycag055","url":null,"abstract":"<p><p>Estuarine ecosystems are jointly regulated by freshwater plumes and seawater intrusion, yet their impact mechanisms on community dynamics remain insufficiently understood. Here, we investigated the response of ciliate community to freshwater plume-seawater intrusion disturbance in a large subtropical estuary in China. Ciliate distribution exhibited clear turnover along environmental gradients in both community composition and abundance. In summer, community composition showed gradual horizontal and vertical shifts that corresponded with broad environmental gradients generated by strong freshwater plumes. In contrast, in winter, community variation was most pronounced between the inner and middle estuary, reflecting the upstream compression of environmental gradients driven by strong seawater intrusion. These patterns were corroborated by our determinants analyses. Variation partitioning analysis revealed that physical factors explained a substantial proportion of community variation in both seasons, and structural equation modelling further demonstrated that physical factors exerted the strongest total effects on community structure. In addition, species abundances closely followed a log-normal distribution in both seasons, which is consistent with predictions of niche-based community theory. Niche differentiation along environmental gradients shaped by freshwater plumes and seawater intrusion may contribute to this pattern. Overall, our findings reveal a clear linkage between ciliate distribution and freshwater plume-seawater intrusion dynamics, suggesting that ciliate communities can sensitively reflect the spatial-temporal variability of these physical processes.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag055"},"PeriodicalIF":6.1,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13064646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147679163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complex viral interactions revealed for the harmful bloom-forming dinoflagellate Karenia brevis. 复杂的病毒相互作用揭示了有害的藻华形成双鞭毛虫短卡雷氏菌。
IF 6.1
ISME communications Pub Date : 2026-03-09 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag051
Anne E Booker, Cong Fei, Shady A Amin, James Custer, Kai Watkins, William Yaeger, So Hyun Ahn, Nayani K Vidyarathna, Alexandra Burns, Sarah Klass, Patricia M Glibert, Cynthia A Heil, Frederik Schulz, Joaquín Martínez Martínez
{"title":"Complex viral interactions revealed for the harmful bloom-forming dinoflagellate <i>Karenia brevis</i>.","authors":"Anne E Booker, Cong Fei, Shady A Amin, James Custer, Kai Watkins, William Yaeger, So Hyun Ahn, Nayani K Vidyarathna, Alexandra Burns, Sarah Klass, Patricia M Glibert, Cynthia A Heil, Frederik Schulz, Joaquín Martínez Martínez","doi":"10.1093/ismeco/ycag051","DOIUrl":"https://doi.org/10.1093/ismeco/ycag051","url":null,"abstract":"<p><p><i>Karenia brevis</i> regularly forms harmful blooms along the West Florida Shelf that negatively affect marine and terrestrial organisms through toxin production. These blooms impose economic and environmental hardship, driving the need for research to understand the factors influencing their dynamics and to mitigate their impacts. A mostly unresolved issue is the potential role of viruses in bloom termination. We conducted an experiment incubating <i>K. brevis</i> cultures with size-fractionated bloom water samples. Flow cytometry revealed giant virus-like populations (VLPs) in replicate cultures with <1 μm-filtered and <0.2 μm-filtered bloom water. The VLPs' abundance was paralleled by declines in photoefficiency and culture lysis. Metagenomic analyses of the lysates revealed 11 giant virus genomes (35%-100% complete) representing 7 viral operational taxonomic units (vOTUs) within the order <i>Imitervirales</i> (<i>Nucleocytoviricota</i>). Ten of these vOTUs were more abundant in the incubations with <0.2 μm-filtered bloom water, coinciding with the absence or low abundance of algicidal bacteria. The vOTUs and <i>K. brevis</i> cell abundances showed a positive correlation at a coastal site during bloom and nonbloom periods. The most apparent association was to vOTU6, which may owe its competitive advantage to the presence of the auxiliary metabolic genes bacteriorhodopsin, carbonic anhydrase, and dinoflagellate viral nucleoprotein. The metagenomes also contained polinton-like virus (PLV) genomes. Since many PLVs are hypothesized to depend on co-infection with <i>Nucleocytoviricota</i> viruses for their propagation, our results suggest complex viral interactions within <i>K. brevis</i> blooms. Future research to elucidate virus-bacteria-<i>K. brevis</i> interaction mechanisms may be key to understanding bloom dynamics and developing management tools.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag051"},"PeriodicalIF":6.1,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13037468/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147596692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High throughput in situ imaging reveals widely occurring diel vertical migration among phytoplankton. 高通量原位成像揭示了浮游植物间广泛发生的垂直迁移。
IF 6.1
ISME communications Pub Date : 2026-03-09 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag049
Karin Garefelt, Bengt Karlson, Michael L Brosnahan, Kaisa Kraft, Anders Torstensson, Jukka Seppälä, Allan Cembella, Anders F Andersson
{"title":"High throughput <i>in situ</i> imaging reveals widely occurring diel vertical migration among phytoplankton.","authors":"Karin Garefelt, Bengt Karlson, Michael L Brosnahan, Kaisa Kraft, Anders Torstensson, Jukka Seppälä, Allan Cembella, Anders F Andersson","doi":"10.1093/ismeco/ycag049","DOIUrl":"https://doi.org/10.1093/ismeco/ycag049","url":null,"abstract":"<p><p>Phytoplankton undertake daily vertical migration through the water column to optimize light and nutrient access while avoiding predators. However, diel vertical migration (DVM) patterns remain poorly characterized for many taxa due to limitations of labor-intensive traditional microscopy. Here, we employed high-throughput <i>in situ</i> imaging flow cytometry to investigate DVM. An Imaging FlowCytobot (IFCB) was deployed to continuously profile the vertical water column for ~10 weeks (August-October 2016) at a location in the Skagerrak, eastern North Sea. This revealed significant DVM for several morpho-taxonomic groups, including taxa belonging to ciliates, dinoflagellates, and diatoms, shifting median depth by 2-6 m between night and day. The analysis also revealed that DVM can be inferred from diel pulses in surface water biomass, which we leveraged to study DVM in an extensive IFCB time-series dataset from the central Baltic Sea (June-October in 2020 and 2021). Migratory taxa accounted for 77% and 79% of total phytoplankton biomass (size range <10-150 μm) in the Skagerrak and Baltic Sea, respectively, underscoring the ecological significance of DVM. Most populations peaked near the surface at midday, although other patterns were also observed. While many taxa displayed consistent migration behaviors across both regions, others differed-likely due to population-specific traits or local environmental conditions. Seasonal changes in migration patterns suggest a role for community turnover and shifting environmental conditions. This study highlights the prevalence of DVM in phytoplankton and showcases the power of automated, high-throughput imaging technologies to advance our understanding of plankton ecology.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag049"},"PeriodicalIF":6.1,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13064659/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147679229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Marine bacteria degrade viral particles as a source of nitrogen, phosphorus, and sulfur-rich dissolved organic matter. 海洋细菌将病毒颗粒降解为氮、磷和富含硫的溶解有机物的来源。
IF 6.1
ISME communications Pub Date : 2026-03-09 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag056
Hongcong Man, Xiaojue Li, Jihua Liu, Chen He, Quan Shi, Xilin Xiao, Wei Wei, Feng Chen, Yongle Xu
{"title":"Marine bacteria degrade viral particles as a source of nitrogen, phosphorus, and sulfur-rich dissolved organic matter.","authors":"Hongcong Man, Xiaojue Li, Jihua Liu, Chen He, Quan Shi, Xilin Xiao, Wei Wei, Feng Chen, Yongle Xu","doi":"10.1093/ismeco/ycag056","DOIUrl":"https://doi.org/10.1093/ismeco/ycag056","url":null,"abstract":"<p><p>Viral particles are abundant in aquatic and soil environments and are operationally defined as part of dissolved organic matter (DOM) in nature. Virions are known to contain rich nitrogen, phosphorus, and sulfur, and they represent a special pool of DOM. Little is known about whether bacteria can use virion DOM to support their growth. In this study, we added purified phage particles to three non-host marine bacterial cultures to investigate how marine bacteria respond to the addition of purified virions. Upon adding virions, we monitored bacterial and viral abundance, bacterial extracellular enzymatic activities, and the composition of virion DOM. Bacterial growth increased with the addition of purified virions, and a large portion of the virions was degraded in the three bacterial cultures within 6 days of incubation. High activities of exocellular alkaline phosphatase and leucine aminopeptidase suggest these exoenzymes are involved in virion degradation. Using an ultra-high-resolution mass spectrometer, we obtained the first van Krevelen diagram of virion DOM molecules. A total of 508 DOM molecules derived from virions were detected, and 77 virion DOM molecules shared across all three bacterial cultures were not detected after 6 days. Together, our results show that bacteria tend to utilize nitrogen-, phosphorus-, and sulfur-rich DOM molecules resulting from virions. This study provides direct evidence that purified virions can serve as a DOM source to support bacterial growth, implying that viruses in the natural environment are a unique source of DOM, which would exert profound impacts on marine food webs and biogenic element cycling.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag056"},"PeriodicalIF":6.1,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13064650/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147679245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Endemic within endemics: the microbiota of the Galapagos marine iguanas. 地方病中的地方病:加拉帕戈斯海鬣蜥的微生物群。
IF 6.1
ISME communications Pub Date : 2026-03-09 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag040
Ido Grinshpan, Omer Lavy, Alvah Zorea, Itai Amit, Liron Levin, Ori Furman, Daniel Somekh, Nataly Guevara, Sarah Moraïs, Otto X Cordero, Itzhak Mizrahi
{"title":"Endemic within endemics: the microbiota of the Galapagos marine iguanas.","authors":"Ido Grinshpan, Omer Lavy, Alvah Zorea, Itai Amit, Liron Levin, Ori Furman, Daniel Somekh, Nataly Guevara, Sarah Moraïs, Otto X Cordero, Itzhak Mizrahi","doi":"10.1093/ismeco/ycag040","DOIUrl":"https://doi.org/10.1093/ismeco/ycag040","url":null,"abstract":"<p><p>The ecological processes shaping host-associated microbial communities in geographically isolated ecosystems remain poorly understood-particularly the interplay between dispersal, selection, and microbial speciation. Here, we characterize the fecal microbiota of the Galápagos marine iguana (<i>Amblyrhynchus cristatus</i>), an iconic endemic vertebrate that depends on its microbiota to digest an algae-based diet. We analyzed fecal samples from 111 individuals across three remote colonies and found that fecal microbial composition is dominated by <i>Clostridia</i>, closely following a neutral dispersal model. Yet, ecological and phylogenetic analyses revealed novel, host-restricted <i>Clostridia</i> clades-spanning species to family level-that appear to have diversified within marine iguanas. These lineages are consistently retained across host populations through strong purifying selection, resulting in striking microbiota homogenization. Our findings demonstrate that endemic hosts can support microbially distinct lineages shaped by stochastic dispersal and parallel selection, advancing our understanding of microbial community assembly in obligate host-microbiota systems.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag040"},"PeriodicalIF":6.1,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13037472/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147596633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 the molecular diversity of marine cyanobacterial communities in the lagoon of Nouméa (New Caledonia): impact of a cyclonic event. 解开努姆萨达(新喀里多尼亚)泻湖海洋蓝藻群落的分子多样性:气旋事件的影响。
IF 6.1
ISME communications Pub Date : 2026-03-07 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag032
Christophe Six, Mathisse Meyneng, Morgane Ratin, Priscilla Gourvil, Raffaele Siano, Hugues Lemonnier
{"title":"Unravelling the molecular diversity of marine cyanobacterial communities in the lagoon of Nouméa (New Caledonia): impact of a cyclonic event.","authors":"Christophe Six, Mathisse Meyneng, Morgane Ratin, Priscilla Gourvil, Raffaele Siano, Hugues Lemonnier","doi":"10.1093/ismeco/ycag032","DOIUrl":"10.1093/ismeco/ycag032","url":null,"abstract":"<p><p>In tropical marine ecosystems, cyanobacteria are key components of phytoplankton communities, yet their diversity and spatio-temporal dynamics in tropical lagoons remain poorly documented. Here, we use the Nouméa lagoon (New Caledonia) as a model system to genetically characterize cyanobacterial communities in a subtropical lagoon subjected to both natural and anthropogenic pressures. Using metabarcoding, we investigated seasonal and spatial variations along environmental gradients, spanning from estuarine zones to oligotrophic reef areas. A single <i>Synechococcus</i> ASV dominated most communities, particularly in nutrient-enriched coastal waters. Beyond this dominant lineage, we uncovered a diverse \"minor cyanosphere,\" which comprised <i>Synechococcus</i> subclusters 5.1, 5.2, and 5.3, several <i>Prochlorococcus</i> ecotypes, an as-yet-uncultivated group of picocyanobacteria, and various diazotrophic cyanobacteria. This assemblage exhibited spatial structuring, suggesting environmental filtering and thereby underscoring its potential as a bioindicator of water masses in lagoon systems. We also assessed the impact of Cyclone Uesi (February 2020), which triggered shifts in community composition. Floodwaters resulted in an atypical surge of fast-growing estuarine <i>Synechococcus</i> strains, which were subsequently transported to offshore reef zones, as confirmed by buoy tracking. These findings suggest that increasingly frequent cyclones could influence plankton dynamics and, consequently, reef health under climate change scenarios. Overall, this study highlights the complex structuring of cyanobacterial communities in the Nouméa lagoon, shaped by spatial gradients, seasonal changes, and episodic extreme disturbances, and emphasizes the ecological significance of reef passages, which help maintain the trophic gradient within the lagoon following cyclonic events.</p>","PeriodicalId":73516,"journal":{"name":"ISME communications","volume":"6 1","pages":"ycag032"},"PeriodicalIF":6.1,"publicationDate":"2026-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12991050/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147476487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intracellular vesicle-mediated biomineralization of arsenic and barium by a sponge symbiotic bacterium. 海绵共生细菌在细胞内囊泡介导的砷和钡生物矿化作用。
IF 6.1
ISME communications Pub Date : 2026-03-06 eCollection Date: 2026-01-01 DOI: 10.1093/ismeco/ycag039
Shani Shoham, Celeste Weiss, Ray Keren, Adi Lavy, Iryna Polishchuk, Boaz Pokroy, Abdussalam Azem, Micha Ilan
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