Table 3 Top-ranked species densities (core sampling, mean per 1/32 m2 ± SD) of macrofauna in Sabellaria alveolata bio-constructions
Site | Rank | Platform type | Reef type | ||
|---|---|---|---|---|---|
Taxa | Mean density ± SD | Taxa | Mean density ± SD | ||
Saint-Germain-sur-Ay | 1 | Sabellaria alveolata | 80.00 ± 31.21 | Sabellaria alveolata | 242.75 ± 77.12 |
2 | Golfingia (Golfingia) vulgaris | 16.13 ± 6.77 | Porcellana platycheles | 32.50 ± 30.16 | |
3 | Porcellana platycheles | 11.88 ± 14.79 | Golfingia (Golfingia) vulgaris | 14.13 ± 11.57 | |
4 | Notomastus latericeus | 6.63 ± 6.30 | Cirratulus cirratus | 2.63 ± 7.42 | |
5 | Gibbula umbilicalis | 5.75 ± 3.41 | Nemertea | 1.88 ± 1.73 | |
Blainville-sur-Mer | 1 | Sabellaria alveolata | 130 ± 53.86 | Sabellaria alveolata | 115.75 ± 140.50 |
2 | Golfingia (Golfingia) vulgaris | 12.25 ± 8.41 | Gibbula umbilicalis | 7.13 ± 7.85 | |
3 | Acanthochitona crinita | 1.25 ± 1.39 | Porcellana platycheles | 2.13 ± 2.23 | |
4 | Perinereis cultrifera | 1.13 ± 1.81 | Golfingia (Golfingia) vulgaris | 1.25 ± 1.49 | |
5 | Spirobranchus triqueter | 1.00 ± 1.07 | Perinereis cultrifera | 1.00 ± 1.41 | |
Lingreville | 1 | Porcellana platycheles | 17.25 ± 26.72 | Sphaeroma serratum/monodi | 24.38 ± 10.32 |
2 | Nemertea | 4.75 ± 3.54 | Porcellana platycheles | 7.88 ± 13.25 | |
3 | Mytilus edulis | 3.13 ± 2.47 | Nemertea | 5.88 ± 13.04 | |
4 | Gibbula umbilicalis | 2.25 ± 2.82 | Gibbula umbilicalis | 3.00 ± 1.85 | |
5 | Malacoceros fuliginosus | 1.75 ± 2.19 | Golfingia (Golfingia) vulgaris | 1.75 ± 2.38 | |
Champeaux | 1 | Sabellaria alveolata | 1182.88 ± 676.30 | Sabellaria alveolata | 771.88 ± 265.52 |
2 | Eulalia ornata | 5.63 ± 4.27 | Sphaeroma serratum/monodi | 100.13 ± 66.25 | |
3 | Perinereis cultrifera | 3.75 ± 4.03 | Porcellana platycheles | 15.75 ± 37.17 | |
4 | Malacoceros fuliginosus | 2.75 ± 4.30 | Golfingia (Golfingia) vulgaris | 5.38 ± 9.53 | |
5 | Sphaeroma serratum/monodi | 2.63 ± 5.07 | Actiniaria | 3.50 ± 5.40 | |