Table 1 Sampling positions and water depth of the Atacama Trench sites.

From: Intra- and inter-spatial variability of meiofauna in hadal trenches is linked to microbial activity and food availability

Study

Site

Latitude

Longitude

Depth

Density

WW

TOC

Chl-a

OPD

DOU

(m)

(ind. 10 cm−2)

(µg WW 10 cm−2)

(g m−2)

(mg m−2)

(cm)

(µmol m−2 d−1)

This study

A1

23˚ 48.72′ S

70˚ 50.04′ W

2560

562.6 ± 111.8

150.4 ± 20.3

490.9

5.36

1.9*

1280 ± 190

A2

21˚ 46.86′ S

71˚ 12.48′ W

7995

509.3 ± 95.7

116.7 ± 43.5

178.7

6.7

3.2 ± 0.1

1236 ± 56

A3

23˚ 02.94′ S

71˚ 18.12′ W

7915

646.0 ± 84.1

127.3 ± 18.2

277.6

23

2.6 ± 0.1

1793 ± 77

A4

23˚ 21.78′ S

71˚ 20.60′ W

8085

645.5 ± 111.0

124.5 ± 36.1

216.5

17.3

3.4 ± 0.4

1490 ± 81

A5

23˚ 49.02′ S

71˚ 22.32′ W

7770

440.4 ± 147.3

135.4 ± 36.9

214

17.2

4.0 ± 0.2

992 ± 50

A6

24˚ 15.96′ S

71˚ 25.38′ W

7720

292.2 ± 78.6

77.0 ± 22.7

223

11.3

4.1 ± 0.3

1035 ± 143

A7

22˚ 56.22′ S

71˚ 37.08′ W

5500

186.1 ± 93.9

42.7 ± 22.2

83.6

3.3

21.7*

355 ± 31

A9

20˚ 19.97′ S

70˚ 58.70′ W

4050

532.1 ± 205.2

133.4 ± 41.2

224.7

15.4

6.2 ± 0.5

687 ± 101

A10

20˚ 19.14′ S

71˚ 17.46′ W

7770

445.7 ± 93.1

110.1 ± 23.7

234.2

22.5

3.1 ± 0.3

1634 ± 71

Danovaro et al.16

B1

23˚ 30.50′ S

70˚ 42.80′ W

1050

550 ± 186

–

49.1 ± 17.7

35.1 ± 10.8

–

–

C7

23˚ 15.00′ S

70˚ 40.00′ W

1355

684 ± 425

–

113.9 ± 32.8

63.9 ± 13.5

–

–

At1

23˚ 15.00′ S

71˚ 21.00′ W

7800

6378 ± 3061

–

57.4 ± 22.7

18.0 ± 0.1

–

–

  1. For each site is presented the average and standard deviation of meiofauna density and biomass in wet weight (WW). Total organic carbon (TOC), chlorophyll-a (chl-a), oxygen penetration depth (OPD) and the average and standard error of diffusive O2 uptake (DOU). The ‘*’ imply that the value is based on only one observation.
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