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Table 4 Top-ranked species densities (core sampling, mean per 1/32 m2 ± SD) of macrofauna in Sabellaria alveolata bio-constructions on different dates at Blainville-Sur-Mer

From: Macrofauna associated with temporary Sabellaria alveolata reefs on the west coast of Cotentin (France)

Date

Rank

Platform type

Reef type

Species

Mean density ± SD

Species

Mean density ± SD

February

1

Sabellaria alveolata

130.00 ± 53.86

Sabellaria alveolata

115.75 ± 140.50

2

Acanthochitona crinita

1.25 ± 1.39

Gibbula umbilicalis

7.13 ± 7.85

3

Perinereis cultrifera

1.13 ± 1.81

Porcellana platycheles

2.13 ± 2.23

4

Spirobranchus triqueter

1.00 ± 1.07

Perinereis cultrifera

1.00 ± 1.41

5

Platynereis dumerilii

0.88 ± 0.99

Venerupis corrugata

0.63 ± 0.52

June

1

Sabellaria alveolata

51.63 ± 44.42

Sabellaria alveolata

42.63 ± 38.63

2

Porcellana platycheles

2.88 ± 5.36

Gibbula umbilicalis

6.50 ± 3.66

3

Gibbula umbilicalis

2.00 ± 1.60

Venerupis corrugata

0.75 ± 1.03

4

Dynamene bidentata

1.50 ± 1.60

Porcellana platycheles

0.63 ± 1.06

5

Eumida sanguinea

0.50 ± 1.07

Eumida sanguinea

0.50 ± 0.53

August

1

Sabellaria alveolata

84.38 ± 54.22

Sabellaria alveolata

16.00 ± 16.09

2

Gibbula umbilicalis

4.88 ± 4.36

Gibbula umbilicalis

12.38 ± 12.83

3

Platynereis dumerilii

3.25 ± 4.89

Cyathura carinata

8.38 ± 6.16

4

Carcinus maenas

2.50 ± 2.51

Porcellana platycheles

4.38 ± 3.25

5

Notomastus latericeus

2.38 ± 1.69

Perinereis cultrifera

2.75 ± 1.49

  1. See “Appendix 2” for taxonomic details and complete species list