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Table 1 Main characteristics of lakes sampled in the present study

From: Microdiversity and phylogeographic diversification of bacterioplankton in pelagic freshwater systems revealed through long-read amplicon sequencing

Lake

Region

Origin

Surface area (km2)

Surface elevation (m)

Maximum depth (m)

Water retention time (y)

Mixing regime

Trophic state

Sampling date

Sampling depth (m)

Mashu (MA)

Japan (Hokkaido)

Caldera

19.2

351

211

200

Dimictic

Oligotrophic

2015 August 26–29

1.5, 200

Kusharo (KU)

Japan (Hokkaido)

Caldera

79.6

121

118

12

Dimictic

Oligotrophic

2015 August 25

1.5, 50

Toya (TO)

Japan (Hokkaido)

Caldera

70.7

84

180

9

Dimictic

Mesotrophic

2015 September 24

5, 150

Inawashiro (IN)

Japan (Honshu)

Tectonic

103.3

514

94

5.4

Monomictic

Oligotrophic

2015 October 30

5, 80

Chuzenji (CH)

Japan (Honshu)

Dammed

11.8

1,269

163

5.9

Dimictic

Oligotrophic

2015 October 21

5, 120

Sai (SA)

Japan (Honshu)

Dammed

2.1

900

72

1.6

Monomictic

Oligotrophic

2015 September 8

10, 50

Motosu (MO)

Japan (Honshu)

Dammed

4.7

900

122

6.5

Monomictic

Oligotrophic

2015 September 7

10, 100

Biwa (BI)

Japan (Honshu)

Tectonic

670.3

85

104

5.5

Monomictic

Mesotrophic

2015 December 9, (2010 Oct. 19)†

2, 60 (5, 50)†

Ikeda (IK)

Japan (Kyushu)

Caldera

10.9

66

233

33.5

Holo-oligomictic

Mesotrophic

2015 September 17

5, 70

Zurich (ZU)

Europe (Switzerland)

Glacial

88.0

406

136

1.4

Holo-oligomictic

Mesotrophic

2017 October 25

5, 60

Maggiore (MG)

Europe (Italy/Switzerland)

Glacial

213.0

193

370

4.1

Holo-oligomictic

Oligo-mesotrophic

2017 October 16

5, 100

  1. Detailed data are available in Table S1
  2. †Sampling date and depths in 2010 are shown in parentheses