Table 2 Summary of the environmental parameters values (mean and standard deviation) registered in both studied habitats in the sublittoral zone off Punta Chacaya

Temperature (°C)

15.4 ± 0.62

13.0 ± 0.47

Dissolved oxygen (ml O ^−l₂ )

2.6 ± 0.92

0.6 ± 0.27

Total organic matter (%)

1.4 ± 0.24

3.31 ± 0.46

Salinity (PSU)

34.5 ± 0.17

34.8 ± 0.07

Grain size (mm)

 4

0.4 ± 1.13%

0%

 2

2.35 ± 2.82%

0.49 ± 0.35%

 1

2.46 ± 1.77%

0.51 ± 0.24%

 0.5

3.99 ± 5.16%

1.48 ± 1.37%

 0.25

8.88 ± 1.5%

2.98 ± 1.11%

 0.125

48.95 ± 1.4%

34.91 ± 4.77%

 0.063

17.79 ± 1.54%

50.30 ± 4.07%

 <0.063

13.44 ± 1.4%

6.40 ± 3.34%

 Graphic average

2.69 ± 0.44

3.06 ± 0.17

 Sorting degree

1.01 ± 0.49

0.73 ± 0.1

 Graphic asymmetry

−0.13 ± 0.13

−0.18 ± 0.08

 Biogenic structures

Shell pieces, Rhodymenia coralline

Thioploca sp. mats