Microbial ecology of the atmosphere

FEMS Microbiology Reviews, Journal Year: 2022, Volume and Issue: 46(4)

Published: Feb. 6, 2022

Abstract The atmosphere connects habitats across multiple spatial scales via airborne dispersal of microbial cells, propagules and biomolecules. Atmospheric microorganisms have been implicated in a variety biochemical biophysical transformations. Here, we review ecological aspects with respect to their dispersal, activity contribution climatic processes. Latest studies utilizing metagenomic approaches demonstrate that communities exhibit pronounced biogeography, driven by combination biotic abiotic factors. We quantify distributions fluxes cells between surface the place special emphasis on long-range pathogen dispersal. Recent advances established these processes may be relevant for macroecological outcomes terrestrial marine habitats. evaluate potential biological transformation atmospheric volatile organic compounds other substrates discuss clouds as hotspots metabolic atmosphere. Furthermore, emphasize role ice nucleating particles relevance water cycle formation precipitation. Finally, impacts anthropogenic forcing natural microbiota emission particulate matter, greenhouse gases are discussed.

Language: Английский

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Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer

Proceedings of the National Academy of Sciences, Journal Year: 2020, Volume and Issue: 117(24), P. 13275 - 13282

Published: June 1, 2020

Microorganisms are ubiquitous and highly diverse in the atmosphere. Despite potential impacts of airborne bacteria found lower atmosphere over Southern Ocean (SO) on ecology Antarctica marine cloud phase, no previous region-wide assessment bioaerosols SO has been reported. We conducted bacterial profiling boundary layer shipboard aerosol samples obtained during an Austral summer research voyage, spanning 42.8 to 66.5°S. Contrary findings global subtropical regions Northern Hemisphere, where transport microorganisms from continents often controls communities, great majority detected our were marine, based taxonomy, back trajectories, source tracking analysis. Further, beta diversity communities varied with latitude temperature, but not other meteorological variables. Limited meridional restricts southward community dispersal, isolating inhibiting microorganism nutrient deposition latitudes these same regions. A consequence implication for this region’s clouds that overtop it is truly pristine, free continental anthropogenic influences, ocean as dominant controlling low-level concentrations condensation nuclei ice nucleating particles.

Language: Английский

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Seasonal shift in airborne microbial communities

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 716, P. 137129 - 137129

Published: Feb. 4, 2020

Language: Английский

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Persistent Desert Microbiota in the Southern European Sky

Environmental Microbiology, Journal Year: 2025, Volume and Issue: 27(2)

Published: Feb. 1, 2025

Long-range atmospheric processes facilitate global microbial dispersal, with a pivotal role in Earth's ecosystem functioning and health. Aerobiological studies have traditionally focused on low troposphere aerosols, leading to the assumption that airborne communities are primarily controlled by neighbouring ecosystems. We show temporal sampling of aerosols from free extending period almost three decades, coupled study both high air masses provenances genetic data topsoils North Africa public bacterial database. The results unveil long-lasting influence African desert microorganisms Southern Europe. Although sea spray dominates aerosol emissions, predominance was widespread even rain traced back Atlantic Ocean. frequency dust outbreaks, altitude reached, long residence times postulated as critical factors significantly shape long-range persistence aerial assemblages, mass provenance playing secondary role. This advances current understanding microorganisms, underscoring their close relationship terrestrial Further research is needed fully understand intercontinental connections deserts drylands elsewhere, immigrants worldwide

Language: Английский

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Seasonal changes dominate long-term variability of the urban air microbiome across space and time

Environment International, Journal Year: 2021, Volume and Issue: 150, P. 106423 - 106423

Published: Feb. 9, 2021

Compared to soil or aquatic ecosystems, the atmosphere is still an underexplored environment for microbial diversity. In this study, we surveyed composition, variability and sources of microbes (bacteria fungi) in near surface a highly populated area, spanning ~ 4,000 Km2 around city center Madrid (Spain), different seasonal periods along two years. We found core abundant bacterial genera robust across space time, most origin, while fungi were more sensitive environmental conditions. Microbial communities showed clear patterns driven by factors, mainly temperature accumulated rain, local played minor role. also identified taxa both groups characteristic periods, but not specific sampling sites plant coverage. The present study suggests that urban environments contains ecosystem stable relatively large spatial temporal scales, with rather homogenous modulated climatic variations. As such, it contributes our understanding long-term changes associated human exposome air areas.

Language: Английский

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Comprehensive insights into advances in ambient bioaerosols sampling, analysis and factors influencing bioaerosols composition

Environmental Pollution, Journal Year: 2023, Volume and Issue: 336, P. 122473 - 122473

Published: Aug. 31, 2023

While the study of bioaerosols has a long history, it garnered heightened interest in past few years, focusing on both culture-dependent and independent sampling analysis approaches. Observations have been made regarding seasonal fluctuations microbial communities their connection to particular ambient atmospheric factors. The airborne is important public health processes. Nevertheless, establishment standardized protocols for evaluating utilizing taxonomy as means identify distinct sources patterns remains relatively unexplored. This article discusses challenges limitations analysis, including lack methods heterogeneity sources. Future prospects field bioaerosols, use high-throughput sequencing technologies, omics studies, spectroscopy fluorescence-based monitoring provide comprehensive incite metabolic capacity, activity are also presented. Furthermore, review highlights factors that affect composition, seasonality, conditions, pollution levels. Overall, this provides valuable resource researchers, policymakers, stakeholders interested understanding managing various environments.

Language: Английский

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Sources, compositions, spatio-temporal distributions, and human health risks of bioaerosols: A review

Atmospheric Research, Journal Year: 2024, Volume and Issue: 305, P. 107453 - 107453

Published: April 30, 2024

Language: Английский

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Vertical Stratification in Urban Green Space Aerobiomes

Environmental Health Perspectives, Journal Year: 2020, Volume and Issue: 128(11)

Published: Nov. 1, 2020

Background: Exposure to a diverse environmental microbiome is thought play an important role in "educating" the immune system and facilitating competitive exclusion of pathogens maintain human health. Vegetation soil are key sources airborne microbiota––the aerobiome. A limited number studies have attempted characterize dynamics near surface green space aerobiomes, no date investigated these from vertical perspective. Vertical stratification aerobiome could implications for public health design, engineering, management urban spaces. Objectives: The primary objectives this study were to: a) assess whether significant bacterial species richness evenness (alpha diversity) occurred parkland habitat Adelaide, South Australia; b) compositional differences (beta between sampling heights occurred; c) preliminarily there altitudinal potentially pathogenic beneficial taxa. Methods: We combined innovative columnar method at level, 0.0, 0.5, 1.0, 2.0m, using passive petri dish collect bacteria. used geographic information (GIS) select sites, we high-throughput sequencing 16S rRNA gene occurred. Results: Our results provide evidence both alpha beta (compositional) diversity communities, with decreasing roughly height. also found Discussion: Although additional research needed, our preliminary findings point different exposure attributes that may be contingent on height activity type. lay foundations further into characteristics aerobiomes their planning. https://doi.org/10.1289/EHP7807

Language: Английский

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Ocean Aerobiology

Frontiers in Microbiology, Journal Year: 2021, Volume and Issue: 12

Published: Oct. 29, 2021

Ocean aerobiology is defined here as the study of biological particles marine origin, including living organisms, present in atmosphere and their role ecological, biogeochemical, climate processes. Hundreds trillions microorganisms are exchanged between ocean daily. Within a few days, tropospheric transport potentially disperses over continents oceans. There need to better identify quantify aerobiota, characterize time spans distances microorganisms' atmospheric transport, determine whether acclimate conditions remain viable, or even grow. Exploring microbial habitat fundamental for understanding consequences dispersal will expand our knowledge biodiversity, biogeography, ecosystem connectivity across different environments. Marine organic matter chemically transformed atmosphere, remineralization back CO2. The magnitude these transformations insignificant context annual carbon cycle, but may be significant sink recalcitrant long (∼104 years) timescales. In addition, sea spray aerosol plays Earth's radiative budget by scattering solar radiation, indirectly affecting cloud properties. generally poor source condensation nuclei (CCN), ice nucleating (INPs), formation mixed-phase clouds. This review show that biogenic an impactful, poorly constrained, ecosystems, biogeochemical processes, system. Further work needed feedbacks ecosystems order integrate this complexity into Earth System models, facilitating future predictions.

Language: Английский

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Contribution of soil bacteria to the atmosphere across biomes

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 871, P. 162137 - 162137

Published: Feb. 10, 2023

The dispersion of microorganisms through the atmosphere is a continual and essential process that underpins biogeography ecosystem development function. Despite ubiquity atmospheric globally, specific knowledge determinants microbial diversity at any given location remains unresolved. Here we describe bacterial in boundary layer underlying soil twelve globally distributed locations encompassing all major biomes, characterise contribution local distant soils to observed community. Across biomes bacteria was negatively correlated with mean annual precipitation but positively temperature. We identified distinct non-randomly assembled communities from each location, some broad trends persisted across including enrichment desiccation UV tolerant taxa Source tracking revealed were more influential than sources determining atmosphere, emissive semi-arid arid contributing most signatures soil. Our findings highlight complexities microbiota are relevant understanding regional global connectivity.

Language: Английский

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