Group

I

II

III

Group mean similarity (%)

36.11

40.85

56.90

Main species (the % contribution to the similarity within each group is given for each species)

Melinna palmate: 47.70

Euclymene lumbricoides: 44.96

Bittium reticulatum: 42.15

Arenicola marina: 39.19

Euclymene oerstedi: 35.25

Loripes lucinalis: 31.05

Ruditapes decussates: 26.05

Cirratulus cirratus: 19.93

Cerastoderma glaucum: 13.6

Cerithium scabridum: 7.17

Melinna palmata: 52.81

Cymadusa filosa: 50.42

Tricolia speciosa: 47.46

Lumbrineris tetraura: 44.30

Loripes lucinalis: 40.85

Euclymene oerstedi: 37.08

Potamides conicus: 32.99

Cirratulus cirratus: 27.25

Scrobicularia plana: 20.56

Cerithium scabridum: 10.42

Nereis cultifera: 54.22

Gammarus insensibilis: 51.02

Cerastoderma glaucum: 47.38

Arenicola marina: 43.40

Pseudocuma longicornis: 38.98

Cirratulus cirratus: 29.51

Bittium reticulatum: 24.38

Cerithium scabridum: 19.14

Scrobicularia plana: 13.72

Potamides conicus: 7.54