Falling bacterial communities from the atmosphere

Woo, Cheolwoon; Yamamoto, Naomichi

doi:10.1186/s40793-020-00369-4

Environmental Microbiome

Table 1 Atmospheric properties of selected bacterial genera

From: Falling bacterial communities from the atmosphere

Phylum	Genus ^a	Sedimentation velocity, V_d (cm s^− 1) ^b	Aerodynamic diameter, d_a (μm) ^c	Microscopy-based diameter or width × length [ref.]
Actinobacteria	Arthrobacter	0.64	8.34	0.6–1.0 μm [46]
	Amnibacterium	2.5	9.99	0.15–0.20 × 0.25–0.30 μm for Amnibacterium kyonggiense [47]
	Blastococcus	1.7	10.1	0.3–1.7 μm [48]
	Rhodococcus	1.5	8.74	0.4–0.6 × 8–12 μm for filaments and 0.2–0.5 × 1.7–3 μm for cocci or short rods for Rhodococcus jostii [49]
	Kocuria	0.42	9.31	1–1.5 μm for Kocuria rosea [50]
	Brachybacterium	0.54	10.3	0.5–0.75 × 1.5–2.5 μm for Brachybacterium faecium [51]
	Propionibacterium	1.6	8.54	0.2–1.5 × 1–5 μm for pleomorphic rods, 20 μm in length for filaments, and 5–20 μm for swollen spherical cells [52]
Bacteroidetes	Mucilaginibacter	0.086	5.32	0.43–0.49 × 1.4–1.8 μm for Mucilaginibacter gynuensis [53]
Firmicutes	Bacillus	0.18	6.75	0.4–1.8 × 0.9–10.0 μm [54]
	Turicibacter	0.30	8.15	0.5–2.0 × 0.7–7.0 μm [55]
	Staphylococcus	0.34	8.75	0.5–1.5 μm [56]
	Romboutsia	0.26	7.33	1.2–2 × 2.3–10 μm for Romboutsia sedimentorum [57]
	Clostridium	0.22	8.03	0.5–1.7 × 2.4–7.6 μm for Clostridium butyricum [58]
Proteobacteria	Acinetobacter	0.90	5.92	0.9–1.6 × 1.5–2.5 μm [59]
	Massilia	5.7	8.79	1.0 × 3.0 μm [60]
	Sphingomonas	0.92	9.90	0.2–1.4 × 0.5–4.0 μm [61]
	Methylobacterium	0.079	10.7	0.8–1.2 × 1.0–8.0 μm [62]
	Rubellimicrobium	2.1	10.9	0.6–0.8 × 2.0–4.0 μm for Rubellimicrobium thermophilum [63]
	Paracoccus	0.54	8.39	0.5–0.9 μm [64]
	Noviherbaspirillum	1.7	10.2	1.0–1.3 × 1.5–2.0 μm for Noviherbaspirillum agri [65]

^aGenera shown in Fig. 2 and detected in air samples for all sampling months have been selected here.
^bCalculated according to Eq. (1) in the method section. The data of August are excluded for the calculation.
^cFor each sampling month, a geometric mean of the aerodynamic diameters of a given particle size distribution was computed using the GM calculator version 1.0 [66]. Then, the mean of the computed monthly-based geometric means of the aerodynamic diameters was calculated to obtain an annually averaged aerodynamic diameter that is representative for each genus

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