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Table 1 Atmospheric properties of selected bacterial genera

From: Falling bacterial communities from the atmosphere

Phylum Genus a Sedimentation velocity, Vd (cm s− 1) b Aerodynamic diameter, da (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]
  1. aGenera shown in Fig. 2 and detected in air samples for all sampling months have been selected here.
  2. bCalculated according to Eq. (1) in the method section. The data of August are excluded for the calculation.
  3. 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