Aerobiology over the Southern Ocean – Implications for bacterial colonization of Antarctica

Malard, Lucie; Avila-Jimenez, Maria-Luisa; Schmale, Julia; Cuthbertson, Lewis; Cockerton, Luke; Pearce, David A.

doi:10.1016/j.envint.2022.107492

Cited by 9 publications

(4 citation statements)

References 83 publications

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“…The dominant species were the fungi Aureobasidium pullulans, Atmosphere 2024, 15, 365 2 of 15 Chaetomium globosum, Cladosporium cladosporioides, Penicillium spp. and a number of others, with numbers up to 2.54 × 10 2 CFU/m 3 of air, which is consistent with the results obtained in cold regions such as Antarctica and Canada [17][18][19][20][21][22]. A significant part of the identified fungi were opportunistic human pathogens.…”

Section: Introductionsupporting

confidence: 90%

Culturable Microorganisms of Aerosols Sampled during Aircraft Sounding of the Atmosphere over the Russian Arctic Seas

Andreeva,

Safatov,

Puchkova

et al. 2024

Atmosphere

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Atmospheric sounding using the Tu-134 Optik aircraft-laboratory was conducted in September 2020 over the seas of the Russian sector of the Arctic Ocean, namely the Barents, Kara, Laptev, East Siberian, Chukchi and Bering seas. Unique samples of atmospheric aerosols at altitudes from 200 and up to 10,000 m were taken, including samples for the identification of cultivated microorganisms and their genetic analysis. Data on the concentration and diversity of bacteria and fungi isolated from 24 samples of atmospheric aerosols are presented; the main phenotypic and genomic characteristics were obtained for 152 bacterial cultures; and taxonomic belonging was determined. The concentration of cultured microorganisms detected in aerosols of different locations was similar, averaging 5.5 × 103 CFU/m3. No dependence of the number of isolated microorganisms on the height and location of aerosol sampling was observed. The presence of pathogenic and condto shitionally pathogenic bacteria, including those referred to in the genera Staphylococcus, Kocuria, Rothia, Comamonas, Brevundimonas, Acinetobacter, and others, as well as fungi represented by the widely spread genera Aureobasidium, Aspergillus, Alternaria, Penicillium, capable of causing infectious and allergic diseases were present in most analyzed samples. Obtained data reveal the necessity of systematic studies of atmospheric microbiota composition to combat emerging population diseases.

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Section: Introductionsupporting

confidence: 90%

Culturable Microorganisms of Aerosols Sampled during Aircraft Sounding of the Atmosphere over the Russian Arctic Seas

Andreeva,

Safatov,

Puchkova

et al. 2024

Atmosphere

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“…The metabolic flexibility of Paraburkholderia is consistent with its bigger genomes size. Previous reports of the presence of Paraburkholderia in the Antarctic environment ( Malard et al, 2022 ) also support the presence of ANT-6 in the Antarctic.…”

Section: Discussionsupporting

confidence: 67%

Depth drives the distribution of microbial ecological functions in the coastal western Antarctic Peninsula

et al. 2023

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The Antarctic marine environment is a dynamic ecosystem where microorganisms play an important role in key biogeochemical cycles. Despite the role that microbes play in this ecosystem, little is known about the genetic and metabolic diversity of Antarctic marine microbes. In this study we leveraged DNA samples collected by the Palmer Long Term Ecological Research (LTER) project to sequence shotgun metagenomes of 48 key samples collected across the marine ecosystem of the western Antarctic Peninsula (wAP). We developed an in silico metagenomics pipeline (iMAGine) for processing metagenomic data and constructing metagenome-assembled genomes (MAGs), identifying a diverse genomic repertoire related to the carbon, sulfur, and nitrogen cycles. A novel analytical approach based on gene coverage was used to understand the differences in microbial community functions across depth and region. Our results showed that microbial community functions were partitioned based on depth. Bacterial members harbored diverse genes for carbohydrate transformation, indicating the availability of processes to convert complex carbons into simpler bioavailable forms. We generated 137 dereplicated MAGs giving us a new perspective on the role of prokaryotes in the coastal wAP. In particular, the presence of mixotrophic prokaryotes capable of autotrophic and heterotrophic lifestyles indicated a metabolically flexible community, which we hypothesize enables survival under rapidly changing conditions. Overall, the study identified key microbial community functions and created a valuable sequence library collection for future Antarctic genomics research.

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“…In the past decade, advances in the field of extremophile research allowed for the development of exploration techniques, sampling and isolation strategies needed to study these organisms. The study of aerosolized particles led to a better understanding of the climate conditions of these regions as well as the microbial ecosystems present [ 48 , 49 ]. Deep-sea cameras equipped with the capability to detect high-pressure environments [ 50 ] and hot-water ice drills have allowed for the retrieval of sub-ice seabed samples [ 51 ] and have enabled the exploration of aquatic environments.…”

Section: Extreme Environments and Their Potential To Fight Diseasementioning

confidence: 99%

The Paradigm Shift of Using Natural Molecules Extracted from Northern Canada to Combat Malaria

Bourgeois,

Lemos,

Roucheray

et al. 2024

Infectious Disease Reports

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Parasitic diseases, such as malaria, are an immense burden to many low- and middle-income countries. In 2022, 249 million cases and 608,000 deaths were reported by the World Health Organization for malaria alone. Climate change, conflict, humanitarian crises, resource constraints and diverse biological challenges threaten progress in the elimination of malaria. Undeniably, the lack of a commercialized vaccine and the spread of drug-resistant parasites beg the need for novel approaches to treat this infectious disease. Most approaches for the development of antimalarials to date take inspiration from tropical or sub-tropical environments; however, it is necessary to expand our search. In this review, we highlight the origin of antimalarial treatments and propose new insights in the search for developing novel antiparasitic treatments. Plants and microorganisms living in harsh and cold environments, such as those found in the largely unexploited Northern Canadian boreal forest, often demonstrate interesting properties that are not found in other environments. Most prominently, the essential oil of Rhododendron tomentosum spp. Subarcticum from Nunavik and mortiamides isolated from Mortierella species found in Nunavut have shown promising activity against Plasmodium falciparum.

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Aerobiology over the Southern Ocean – Implications for bacterial colonization of Antarctica

Cited by 9 publications

References 83 publications

Culturable Microorganisms of Aerosols Sampled during Aircraft Sounding of the Atmosphere over the Russian Arctic Seas

Culturable Microorganisms of Aerosols Sampled during Aircraft Sounding of the Atmosphere over the Russian Arctic Seas

Depth drives the distribution of microbial ecological functions in the coastal western Antarctic Peninsula

The Paradigm Shift of Using Natural Molecules Extracted from Northern Canada to Combat Malaria

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