Environmental microbiology最新文献

Bee microbiomes in a changing climate: Investigating the effects of temperature on solitary bee life history and health 不断变化的气候中的蜜蜂微生物群：调查温度对独居蜜蜂生活史和健康的影响

IF 5.1 2区生物学

Environmental microbiology Pub Date : 2024-11-08 DOI: 10.1111/1462-2920.70002

Bailey L. Crowley, Robert N. Schaeffer

{"title":"Bee microbiomes in a changing climate: Investigating the effects of temperature on solitary bee life history and health","authors":"Bailey L. Crowley, Robert N. Schaeffer","doi":"10.1111/1462-2920.70002","DOIUrl":"https://doi.org/10.1111/1462-2920.70002","url":null,"abstract":"Climate change is rapidly warming thermal environments, an important abiotic stimulus governing interactions between microbial symbionts and their hosts. Increasing evidence suggests that solitary bees rely on pollen provision microbes for successful development. However, the effects of heat stress on provision microbiota and the resulting consequences for larval health and development remain to be examined. We performed an in vitro study to investigate the effects of the thermal environment on provision microbiome composition and measured fitness outcomes for Osmia lignaria larvae. While pollen sterilisation removed bacteria from microbe‐rich provisions, larval survivorship did not significantly differ between bees reared on microbe‐rich (unmanipulated) diets and provisions treated with ethylene oxide (EO) gas. In contrast to previous research in solitary bees, larvae reared on EO‐treated provisions weighed more and had higher total fat content, with temperature moderating the degree of difference. As anticipated, we observed a negative relationship between the duration of larval development and temperature. Our results indicated that an intact provision microbiota may not always improve bee fitness and that bee‐microbe interactions during larval development may contribute to the size‐shrinking effect observed for cavity‐nesting bees under warming conditions.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597657","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

Understanding the ecological versatility of Tetracladium species in temperate forest soils 了解温带森林土壤中四cladium 物种的生态多样性。

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-11-04 DOI: 10.1111/1462-2920.70001

Anna Lazar, Richard P. Phillips, Stephanie Kivlin, Gary D. Bending, Ryan M. Mushinski

{"title":"Understanding the ecological versatility of Tetracladium species in temperate forest soils","authors":"Anna Lazar, Richard P. Phillips, Stephanie Kivlin, Gary D. Bending, Ryan M. Mushinski","doi":"10.1111/1462-2920.70001","DOIUrl":"10.1111/1462-2920.70001","url":null,"abstract":"Although Tetracladium species have traditionally been studied as aquatic saprotrophs, the growing number of metagenomic and metabarcoding reports detecting them in soil environments raises important questions about their ecological adaptability and versatility. We investigated the factors associated with the relative abundance, diversity and ecological dynamics of Tetracladium in temperate forest soils. Through amplicon sequencing of soil samples collected from 54 stands in six forest sites across the eastern United States, we identified 29 distinct Amplicon Sequence Variants (ASVs) representing Tetracladium, with large differences in relative abundance and small changes in ASV community composition among sites. Tetracladium richness was positively related to soil pH, soil temperature, total sulphur and silt content, and negatively related to plant litter quality, such as the lignin-to-nitrogen ratio and the lignocellulose index. Co-occurrence network analysis indicated negative relationships between Tetracladium and other abundant fungal groups, including ectomycorrhizal and arbuscular mycorrhizal fungi. Collectively, our findings highlight the ecological significance of Tetracladium in temperate forest soils and emphasize the importance of site-specific factors and microbial interactions in shaping their distribution patterns and ecological dynamics.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142575008","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

Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities 海洋 Synechococcus 培养物和群落中假钴胺素的生产和利用

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-24 DOI: 10.1111/1462-2920.16701

Catherine C. Bannon, Maria A. Soto, Elden Rowland, Nan Chen, Anna Gleason, Emmanuel Devred, Julie LaRoche, Erin M. Bertrand

{"title":"Production and utilization of pseudocobalamin in marine Synechococcus cultures and communities","authors":"Catherine C. Bannon, Maria A. Soto, Elden Rowland, Nan Chen, Anna Gleason, Emmanuel Devred, Julie LaRoche, Erin M. Bertrand","doi":"10.1111/1462-2920.16701","DOIUrl":"10.1111/1462-2920.16701","url":null,"abstract":"Cobalamin influences marine microbial communities because an exogenous source is required by most eukaryotic phytoplankton, and demand can exceed supply. Pseudocobalamin is a cobalamin analogue produced and used by most cyanobacteria but is not directly available to eukaryotic phytoplankton. Some microbes can remodel pseudocobalamin into cobalamin, but a scarcity of pseudocobalamin measurements impedes our ability to evaluate its importance for marine cobalamin production. Here, we perform simultaneous measurements of pseudocobalamin and methionine synthase (MetH), the key protein that uses it as a co-factor, in Synechococcus cultures and communities. In Synechococcus sp. WH8102, pseudocobalamin quota decreases in low temperature (17°C) and low nitrogen to phosphorus ratio, while MetH did not. Pseudocobalamin and MetH quotas were influenced by culture methods and growth phase. Despite the variability present in cultures, we found a comparably consistent quota of 300 ± 100 pseudocobalamin molecules per cyanobacterial cell in the Northwest Atlantic Ocean, suggesting that cyanobacterial cell counts may be sufficient to estimate pseudocobalamin inventories in this region. This work offers insights into cellular pseudocobalamin metabolism, environmental and physiological conditions that may influence it, and provides environmental measurements to further our understanding of when and how pseudocobalamin can influence marine microbial communities.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16701","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142489470","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

Novel oil-associated bacteria in Arctic seawater exposed to different nutrient biostimulation regimes 北极海水中暴露于不同营养生物刺激机制的新型石油相关细菌

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-16 DOI: 10.1111/1462-2920.16688

Francisco D. Davila Aleman, María A. Bautista, Janine McCalder, Kaiden Jobin, Sean M. C. Murphy, Brent Else, Casey R. J. Hubert

{"title":"Novel oil-associated bacteria in Arctic seawater exposed to different nutrient biostimulation regimes","authors":"Francisco D. Davila Aleman, María A. Bautista, Janine McCalder, Kaiden Jobin, Sean M. C. Murphy, Brent Else, Casey R. J. Hubert","doi":"10.1111/1462-2920.16688","DOIUrl":"10.1111/1462-2920.16688","url":null,"abstract":"The Arctic Ocean is an oligotrophic ecosystem facing escalating threats of oil spills as ship traffic increases owing to climate change-induced sea ice retreat. Biostimulation is an oil spill mitigation strategy that involves introducing bioavailable nutrients to enhance crude oil biodegradation by endemic oil-degrading microbes. For bioremediation to offer a viable response for future oil spill mitigation in extreme Arctic conditions, a better understanding of the effects of nutrient addition on Arctic marine microorganisms is needed. Controlled experiments tracking microbial populations revealed a significant decline in community diversity along with changes in microbial community composition. Notably, differential abundance analysis highlighted the significant enrichment of the unexpected genera Lacinutrix, Halarcobacter and Candidatus Pseudothioglobus. These groups are not normally associated with hydrocarbon biodegradation, despite closer inspection of genomes from closely related isolates confirming the potential for hydrocarbon metabolism. Co-occurrence analysis further revealed significant associations between these genera and well-known hydrocarbon-degrading bacteria, suggesting potential synergistic interactions during oil biodegradation. While these findings broaden our understanding of how biostimulation promotes enrichment of endemic hydrocarbon-degrading genera, further research is needed to fully assess the suitability of nutrient addition as a stand-alone oil spill mitigation strategy in this sensitive and remote polar marine ecosystem.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16688","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444189","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

Global risk dynamics of Borrelia miyamotoi in the context of climate change 气候变化背景下宫本氏包虫病的全球风险动态

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-16 DOI: 10.1111/1462-2920.70000

Tian Tang, Hong-Han Ge, Tian Ma, Meng-meng Hao, Shuai Chen, Chen-Long Lv, Yun-Bo Qiu, Yan-He Wang, Yao Tian, Jin-Jin Chen, Shuai Yuan, Qian Wang, Dong Jiang, Fang-Yu Ding, Wei Liu, Li-Qun Fang

{"title":"Global risk dynamics of Borrelia miyamotoi in the context of climate change","authors":"Tian Tang, Hong-Han Ge, Tian Ma, Meng-meng Hao, Shuai Chen, Chen-Long Lv, Yun-Bo Qiu, Yan-He Wang, Yao Tian, Jin-Jin Chen, Shuai Yuan, Qian Wang, Dong Jiang, Fang-Yu Ding, Wei Liu, Li-Qun Fang","doi":"10.1111/1462-2920.70000","DOIUrl":"10.1111/1462-2920.70000","url":null,"abstract":"The impact of Borrelia miyamotoi on human health, facilitated by the expanding geographical distribution and increasing population of Ixodes ticks, remains obscure in the context of global climate change. We employed multiple models to evaluate the effect of global climate change on the risk of B. miyamotoi worldwide across various scenarios. The habitat suitability index of four primary vector tick species for B. miyamotoi, including Ixodes persulcatus, Ixodes ricinus, Ixodes pacificus and Ixodes scapularis, was projected using a boosted regression tree model, considering multiple shared socio-economic pathway scenarios over various time periods. The modelling analysis reveals that, apart from I. scapularis, future global warming will result in a northward shift in the other three vector tick species and a gradual reduction in suitable habitats. Random forest models indicate consistent changes in B. miyamotoi and its primary tick species, with potential risk areas shrinking and shifting northward, particularly in the eastern USA, northeastern and northern Europe and northeast Asia. These findings highlight the urgent need for enhanced active surveillance of B. miyamotoi infection in primary vector tick species across projected potential risk areas. The effect of climate change on B. miyamotoi distribution might have significant implications for public health decision-making regarding tick-borne pathogens.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444190","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

Cable bacteria colonise new sediment environments through water column dispersal 缆索细菌通过水柱传播定殖新的沉积物环境

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-16 DOI: 10.1111/1462-2920.16694

Jesper R. van Dijk, Jeanine S. Geelhoed, Philip Ley, Silvia Hidalgo-Martinez, Miguel Portillo-Estrada, Erik Verbruggen, Filip J. R. Meysman

{"title":"Cable bacteria colonise new sediment environments through water column dispersal","authors":"Jesper R. van Dijk, Jeanine S. Geelhoed, Philip Ley, Silvia Hidalgo-Martinez, Miguel Portillo-Estrada, Erik Verbruggen, Filip J. R. Meysman","doi":"10.1111/1462-2920.16694","DOIUrl":"10.1111/1462-2920.16694","url":null,"abstract":"Cable bacteria exhibit a unique metabolism involving long-distance electron transport, significantly impacting elemental cycling in various sediments. These long filamentous bacteria are distributed circumglobally, suggesting an effective mode of dispersal. However, oxygen strongly inhibits their activity, posing a challenge to their dispersal through the water column. We investigated the effective dispersal of marine cable bacteria in a compartmentalised microcosm experiment. Cable bacteria were grown in natural ‘source’ sediment, and their metabolic activity was recorded in autoclaved ‘destination’ cores, which were only accessible through oxygenated seawater. Colonisation occurred over weeks, and destination cores contained only one cable bacterium strain. Filament ‘snippets’ (fragments with a median size of ~15 cells) accumulated in the microcosm water, with about 30% of snippets attached to sediment particles. Snippet release was also observed in situ in a salt marsh creek. This provides a model for the dispersal of cable bacteria through oxygenated water: snippets are formed by filament breakage in the sediment, released into the overlying water and transported with sediment particles that likely offer protection. These insights are informative for broader theories on microbial community assembly and prokaryotic biogeography in marine sediments.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16694","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444188","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

Specialization of Alcanivorax species in colonizing diverse plastics Alcanivorax 物种在不同塑料中的定殖特化

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-14 DOI: 10.1111/1462-2920.16698

Valérie Mattelin, Astrid Rombouts, Josefien Van Landuyt, Alberto Scoma, Nico Boon

{"title":"Specialization of Alcanivorax species in colonizing diverse plastics","authors":"Valérie Mattelin, Astrid Rombouts, Josefien Van Landuyt, Alberto Scoma, Nico Boon","doi":"10.1111/1462-2920.16698","DOIUrl":"https://doi.org/10.1111/1462-2920.16698","url":null,"abstract":"Recently, there has been increased attention to hydrocarbonoclastic bacteria in the plastisphere. One particular genus, Alcanivorax, is reported in the biodegradation of several polymers in the literature. In this study, we further explored the role of Alcanivorax in the early colonization of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), nylon 6/69, and a novel plastic B4PF01. Starting from enrichments of a one-year experiment with a maximum relative abundance of 58.8% of Alcanivorax, two parallel experiments were set up. One experiment followed growth and activity during the first 21 days of plastic incubations, and the other followed the same parameters on the different material fractions of the plastics, such as leachables and pure polymer. For all plastic types, the highest microbial growth was associated with the total plastics compared to the other material fractions. A relative abundance of 62.7% of Alcanivorax in the nylon 6/69-enriched community was observed. This, combined with data on activity, suggests that nylon 6/69 is potentially degraded by this genus. Two isolates were obtained, closely related to A. borkumensis SK2 and Alcanivorax sp. DG881. The activity and growth of the isolates as axenic cultures resemble their abundance in the community. In conclusion, this study contributes to the knowledge of the role of Alcanivorax in plastic-enriched communities.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16698","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142435751","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

Distinct microbial communities supported by iron oxidation 铁氧化作用支持的独特微生物群落。

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-10 DOI: 10.1111/1462-2920.16706

Kateřina Burkartová, Antonín Hlaváček, Sergej Skoblia, Lukáš Falteisek

{"title":"Distinct microbial communities supported by iron oxidation","authors":"Kateřina Burkartová, Antonín Hlaváček, Sergej Skoblia, Lukáš Falteisek","doi":"10.1111/1462-2920.16706","DOIUrl":"10.1111/1462-2920.16706","url":null,"abstract":"Microbial biostalactites and streamers commonly grow at iron seepages in abandoned mines worldwide. This study addresses the diversity and composition of these simple prokaryotic communities, which thrive in pH ranges from 2.4 to 6.6 across six different mines. Our analysis of 85 communities reveals that a pH of approximately 3.2 is a critical threshold where alpha and beta diversity change discretely. Below this pH, the average number of ASVs per sample is 2.91 times lower than above this boundary. Autotrophs, heterotrophs, and symbionts of eukaryotes originate from nearly non-overlapping species pools in the two habitat types that differ only in pH. Communities below pH 3.2 further divide into two distinct groups, differing in diversity, taxonomic, and functional composition. Both types of communities coexist within the same stalactites, likely corresponding to zones where the capillary structure of the stalactite is either perfused or clogged. These findings indicate that microbial community structure can be significantly influenced by the intricate spatial organization of the ecosystem, rather than solely by measurable environmental parameters.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16706","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399746","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

The role of foraging pollinators in assembling the flower microbiota and transmitting the fire blight pathogen Erwinia amylovora 觅食传粉昆虫在组合花卉微生物群和传播火疫病病原体 Erwinia amylovora 中的作用。

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-10 DOI: 10.1111/1462-2920.16702

Salma Mukhtar, M. Amine Hassani, Tracy Zarrillo, Zhouqi Cui, George W. Sundin, Quan Zeng

{"title":"The role of foraging pollinators in assembling the flower microbiota and transmitting the fire blight pathogen Erwinia amylovora","authors":"Salma Mukhtar, M. Amine Hassani, Tracy Zarrillo, Zhouqi Cui, George W. Sundin, Quan Zeng","doi":"10.1111/1462-2920.16702","DOIUrl":"10.1111/1462-2920.16702","url":null,"abstract":"Flowers serve as hubs for biotic interactions with pollinators and microbes, which can significantly impact plant reproduction and health. Previous studies have shown that the flower microbiota undergoes dynamic assembly processes during anthesis. However, the influence of foraging pollinators on the assembly and dispersal of the flower microbiota and the transmission of plant pathogens remains poorly understood. In this study, we used insect exclusion netting to investigate the role of pollinators in the assembly of the microbiota on apple stigma and the transmission of the fire blight pathogen Erwinia amylovora. We found that excluding pollinators had a minor impact on the community diversity and composition of the apple stigma microbiota, while the flower's developmental stage had a strong influence. Additionally, pollinator exclusion altered bacterial dispersal and the relative abundance of different bacterial species, including E. amylovora, suggesting that pollinators play a role in transmitting plant pathogens. Using a reporter system, we demonstrated that bumble bees can transmit the fire blight pathogen from an infected flower under controlled growth conditions. Our study highlights the importance of intrinsic and pollinator-independent microbes as sources of inoculum for the stigma microbiota and underscores the role of foraging pollinators in vectoring plant pathogens.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142399747","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

Genome-wide differentiation corresponds to climatic niches in two species of lichen-forming fungi 全基因组分化与两种地衣形成真菌的气候龛位相对应

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2024-10-10 DOI: 10.1111/1462-2920.16703

Edgar L. Y. Wong, Henrique F. Valim, Imke Schmitt

{"title":"Genome-wide differentiation corresponds to climatic niches in two species of lichen-forming fungi","authors":"Edgar L. Y. Wong, Henrique F. Valim, Imke Schmitt","doi":"10.1111/1462-2920.16703","DOIUrl":"10.1111/1462-2920.16703","url":null,"abstract":"Lichens can withstand fluctuating environmental conditions such as hydration-desiccation cycles. Many species distribute across climate zones, suggesting population-level adaptations to conditions such as freezing and drought. Here, we aim to understand how climate affects population genomic patterns in lichenized fungi. We analysed population structure along elevational gradients in closely related Umbilicaria phaea (North American; two gradients) and Umbilicaria pustulata (European; three gradients). All gradients showed clear genomic breaks splitting populations into low-elevation (Mediterranean zone) and high-elevation (cold temperate zone). A total of 3301 SNPs in U. phaea and 138 SNPs in U. pustulata were driven to fixation between the two ends of the gradients. The difference between the species is likely due to differences in recombination rate: the sexually reproducing U. phaea has a higher recombination rate than the primarily asexually reproducing U. pustulata. Cline analysis revealed allele frequency transitions along all gradients at approximately 0°C, coinciding with the transition between the Mediterranean and cold temperate zones, suggesting freezing is a strong driver of population differentiation. Genomic scans further confirmed temperature-related selection targets. Both species showed similar differentiation patterns overall, but different selected alleles indicate convergent adaptation to freezing. Our results enrich our knowledge of fungal genomic functions related to temperature and climate, fungal population genomics, and species responses to environmental heterogeneity.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.16703","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398506","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