Table 2 Mean monthly density (individuals per m2), total numerical dominance (%) and presence (%) of dominant (>1%) and/or most frequent (>50%) species at any of the three sampling sites
Species | Sampling site | ||||||||
|---|---|---|---|---|---|---|---|---|---|
D2 | D15 | D17 | |||||||
Mean abundance (±SD) | Dominance (%) | Presence (%) | Mean abundance (±SD) | Dominance (%) | Presence (%) | Mean abundance (±SD) | Dominance (%) | Presence (%) | |
Gibbula cineraria | 22.0 ± 52.5 | 3.2 | 54 | – | – | – | 27.7 ± 67.0 | 3.8 | 69 |
Gibbula magus | – | – | – | – | – | – | 52.7 ± 58.6 | 7.3 | 92 |
Rissoa parva | 421.2 ± 1,414.7 | 61.3 | 85 | 11.8 ± 16.2 | 12.9 | 54 | 120.6 ± 275.9 | 16.7 | 54 |
Caecum trachea | 12.6 ± 17.9 | 1.8 | 85 | 0.8 ± 2.1 | 0.9 | 15 | 19.5 ± 25.8 | 2.7 | 77 |
Turritella communis | – | – | – | – | – | – | 64.3 ± 115.8 | 8.9 | 85 |
Calyptraea chinensis | 12.4 ± 21.9 | 1.8 | 69 | – | – | – | 116.8 ± 164.2 | 16.2 | 100 |
Euspira pulchella | 4.9 ± 4.0 | 0.7 | 77 | – | – | – | 6.0 ± 4.7 | 0.8 | 77 |
Nassarius pygmaeus | 6.9 ± 5.9 | 1.0 | 85 | 0.8 ± 2.1 | 0.9 | 15 | 19.5 ± 24.2 | 2.7 | 69 |
Nassarius reticulatus | 53.6 ± 29.3 | 7.8 | 100 | 70.1 ± 54.6 | 76.3 | 92 | 148.9 ± 78.3 | 20.6 | 100 |
Bela nebula | 9.1 ± 7.8 | 1.3 | 77 | 2.7 ± 4.9 | 3.0 | 31 | 12.9 ± 12.1 | 1.8 | 69 |
Mangelia coarctata | 1.1 ± 4.0 | 0.2 | 8 | – | – | – | 25.8 ± 35.5 | 3.6 | 69 |
Chrysallida terebellum | 24.5 ± 31.3 | 3.6 | 62 | – | – | – | 18.4 ± 25.9 | 2.5 | 62 |
Turbonilla pusilla | – | – | – | 0.5 ± 1.3 | 0.6 | 15 | 21.1 ± 18.5 | 2.9 | 85 |
Cylichnina umbilicata | 36.5 ± 45.9 | 5.3 | 77 | – | – | – | 6.9 ± 8.2 | 1.0 | 62 |
Retusa truncatula | 13.7 ± 16.6 | 2.0 | 69 | 0.3 ± 1.0 | 0.3 | 0.8 | 16.2 ± 17.4 | 2.2 | 92 |
Total dominance (%) | Â | 90.0 | Â | Â | 94.9 | Â | Â | 93.7 | Â |