Soil Microbial Community Structure in an Asian Dust Source Region (Loess Plateau)

Kenzaka, Takehiko; Sueyoshi, Akio; Baba, Takashi; Li, Pinfang; Tani, Katsuji; Yamaguchi, Naohito; Nasu, Masao

doi:10.1264/jsme2.me09164

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…The APC composition varied over time but was dominated by phylotypes belonging to Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes, which are known to include several pathogenic species (Yamaguchi et al, 2012a;Morimoto et al, 2017). These bacterial members are typically generated from soil environments (Kenzaka et al, 2010). Remarkably, a high number of unclassified sequences were present in APCs compared to water samples, which indicates the presence of unknown bacteria in the APC that may be derived from soils and specific to this community.…”

Section: Discussionmentioning

confidence: 99%

Aeolian Prokaryotic Communities of the Global Dust Belt Over the Red Sea

et al. 2020

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Aeolian prokaryotic communities (APC) are important components of bioaerosols that are transported freely or attached to dust particles suspended in the atmosphere. Terrestrial and marine ecosystems are known to release and receive significant prokaryote loads into and from the surrounded atmospheric air. However, compared to terrestrial systems, there is a lack of microbial characterization of atmospheric dust over marine systems, such as the Red Sea, which receives significant terrestrial dust loads and is centrally located within the Global Dust Belt. Prokaryotic communities are likely to be particularly important in the Global Dust Belt, the area between the west coast of North Africa and Central Asia that supports the highest dust fluxes on the planet. Here we characterize the diversity and richness of the APC over the Red Sea ecosystem, the only sea fully contained within the Global Dust Belt. MiSeq sequencing was used to target 16S ribosomal DNA of two hundred and forty aeolian dust samples. These samples were collected at ∼7.5 m high above the sea level at coastal and offshore sampling sites over a 2-year period (2015–2017). The sequencing outcomes revealed that the APC in the atmospheric dust is dominated by Proteobacteria (42.69%), Firmicutes (41.11%), Actinobacteria, (7.69%), and Bacteroidetes (3.49%). The dust-associated prokaryotes were transported from different geographical sources and found to be more diverse than prokaryotic communities of the Red Sea surface water. Marine and soil originated prokaryotes were detected in APC. Hence, depending on the season, these groups may have traveled from other distant sources during storm events in the Red Sea region, where the APC structure is influenced by the origin and the concentration of aeolian dust particles. Accordingly, further studies of the impact of atmospheric organic aerosols on the recipient environments are required.

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Section: Discussionmentioning

confidence: 99%

Aeolian Prokaryotic Communities of the Global Dust Belt Over the Red Sea

et al. 2020

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“…Culture‐independent molecular approaches have revealed the widespread occurrence of members of the phylum ‘ Acidobacteria ’ in nature. Large numbers of 16S rRNA gene clones of this phylum have been retrieved from soils (Janssen, 2006; Otsuka et al , 2008; Kenzaka et al , 2010), sediments (Dunbar et al , 1999; Barns et al , 2007), wastewater (LaPara et al , 2000; Narihiro et al , 2009), acid mine drainage (AMD) (Diaby et al , 2007; Tan et al , 2007), and hot springs (Hobel et al , 2005). The biodiversity of the Acidobacteria is potentially as great as that of the phylum Proteobacteria (Ludwig et al , 1997; Hugenholtz et al , 1998).…”

Section: Introductionmentioning

confidence: 99%

Acidipila rosea gen. nov., sp. nov., an acidophilic chemoorganotrophic bacterium belonging to the phylum Acidobacteria

Okamura

Kawai

Yamada

et al. 2011

FEMS Microbiology Letters

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Two strains of aerobic acidophilic chemoorganotrophic bacteria designed strains AP8(T) and AP9 were isolated from acid mine drainage and acidic soil, respectively. These isolates were gram-negative, nonmotile cocci and coccobacilli measuring 0.5-0.8 μm in diameter. Cells were capsulated. Colonies on solid media were pink colored. The pH range for growth was 3.0-6.0 (optimum pH 4.5). Sugars, gluconate, and some amino acids were good carbon and energy sources for growth. The main components of cellular fatty acids were C(15:0) iso and C(16:1) ω7c. Menaquinone-8 was the major quinone. The G+C content of genomic DNA was 59.5%. Both strains had identical sequences of 16S rRNA genes that were most closely related to that of the type strain of Acidobacterium capsulatum (96% similarity). There were major differences between the isolates and A. capsulatum in cell morphology, carbon nutrition, and fatty acid profiles. Based on these phylogenetic and phenotypic data, we propose the name Acidipila rosea gen. nov., sp. nov. to accommodate the novel isolates. The type strain is AP8(T) (NBRC 107607(T), KCTC 23427(T)).

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“…(ii) There are no arrangements in place to collect airborne samples for elucidation of biological features on ordinary days. (iii) The existing culture and PCR-based methods for analyzing bacterial structures, including the plate method, Sanger sequencing, and DGGE, are not suitable for handling unculturable bacteria and multiple data on a large scale182021.…”

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confidence: 99%

Alterations in the airborne bacterial community during Asian dust events occurring between February and March 2015 in South Korea

Cha

Lee

Jang

et al. 2016

Sci Rep

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During Asian dust events, a relatively high concentration of particulate matter is transported by wind from arid and semi-arid regions, such as the Gobi and Taklamakan deserts, to nearby countries, including China, Korea, and Japan. The dust particles contain various microorganisms, which can affect human health as well as the environmental microbe population. In the current study, we investigated the characteristics of the airborne bacterial community during Asian dust events between February and March 2015 in South Korea. Bacterial diversity indexes such as operational taxonomic units, Chao1 and Inverse Simpson index were increased, along with total 16S rRNA gene copy number during Asian dust events. The bacterial community structure during Asian dust events was clearly distinguishable from that during non-Asian dust days. The genera Bacillus and Modestobacter were increased 3.9- and 2.7-fold, respectively, while Escherichia-Shigella was decreased by 89.8%. A non-metric multidimensional scaling plot with metadata analysis revealed association of particulate matter concentration, but not temperature, humidity or wind speed, with bacterial community structure, suggesting that the newly transported dust particles contain various microorganisms that influence the airborne bacterial environment.

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Soil Microbial Community Structure in an Asian Dust Source Region (Loess Plateau)

Cited by 10 publications

References 32 publications

Aeolian Prokaryotic Communities of the Global Dust Belt Over the Red Sea

Aeolian Prokaryotic Communities of the Global Dust Belt Over the Red Sea

Acidipila rosea gen. nov., sp. nov., an acidophilic chemoorganotrophic bacterium belonging to the phylum Acidobacteria

Alterations in the airborne bacterial community during Asian dust events occurring between February and March 2015 in South Korea

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