Table 4.

Comparison of virioplankton abundance and subclusters and VPR from relevant studies

Study areas	Abundance (×106 particles/ml)	Subclusters	VPR	References
Tropical Western Pacific Ocean	1.30 ± 0.49–7.23 ± 3.21	3–4	15.88 ± 6.61–45.49 ± 15.32	Present study
Western Pacific Ocean	0.8 ± 0.3–6.9 ± 3.2	2	14.6 ± 5.6–21.2 ± 9.0	Liang et al. (2017)
Western Pacific Ocean	0.68 ± 0.36–5.82 ± 2.05		10.08 ± 2.41–14.68 ± 6.71	Li et al. (2014)
Central Pacific Ocean and the Pacific sector of the Southern Ocean	1.5–32	3	8.6 ± 2.4–22.2 ± 14.4	Yang et al. (2010)
Global cruise (South China Sea, Indian Ocean, Atlantic Ocean, Pacific Ocean)	1.11 ± 0.78–8.94 ± 4.69	2	16.2 ± 7.9–19.0 ± 8.2	Liang et al. (2014)
North Atlantic Ocean		5		Mojica et al. (2016)
North Atlantic latitudinal transect	0.58 ± 0.23–4.48 ± 2.38	3	19.2 ± 8.3–59.1 ± 18.7	De Corte et al. (2012)
(Sub)tropical Atlantic Ocean	0.43 ± 0.08–2.54 ± 1.09	3	9.51 ± 2.63–25.18 ± 4.48	De Corte et al. (2010)
South Atlantic Ocean	0.61 ± 0.31–4.66 ± 4.06	3	15.0 ± 15.7–32.9 ± 25.1	De Corte et al. (2016)
Eastern Mediterranean Sea	0.12–27	3	3.9–44.2	Magiopoulos and Pitta (2012)
Northwestern Mediterranean Sea	0.9 ± 0.3–17.4 ± 19.6	3	13.9 ± 4.0–22.2 ± 15.3	Winter et al. (2009)
North Sea	5–70	4		Baudoux et al. (2008)
East China Sea	0.34–2.3	2		Yang and Jiao (2002)
Norwegian coastal waters		3	4.3 ± 2.4	Bratbak et al. (2011)

Abbreviation: VPR, virioplankton/prokaryote ratio.