Research Article
Hydrodynamic Conditions Effects on Soft-Bottom Subtidal Nearshore Benthic Community Structure and Distribution
Table 4
Biotic characteristics of the three main groups of stations identified by cluster analysis along the French Basque coast during the field campaigns.
| | Faunal assemblages | Stations number | Similarity levels | SIMPER characteristic species (cut off for low contributions: 70,00%) | Species richness (species 0.3 m2) | Density (ind. 0.3 m2) | Pielou’s evenness index (J′) | Shannon’s diversity index (H′) | Sediments |
| | A | 3 | 30% | Scolelepis spp. (34%) | 6 ± 4 | 19 ± 15 | 0.5 ± 0.1 | 1.1 ± 0.6 | Clean fine sands (silt & clay <2%) | | Nephtys cirrosa (29%) | | Acrocnida brachiata (15%) |
| | B | 3 | 33% | Diogenes pugilator (12%) | 25 ± 9 | 162 ± 211 | 0.8 ± 0.2 | 3.5 ± 0.7 | Muddy sand (silt & clay <30%) | | Fabulina fabula (8%) | | Tritia reticulata (8%) | | Echinocardium cordatum (7%) | | Abra alba (6%) | | Nephtys hombergii (5%) | | Sigalion mathildae (4%) | | Antalis novemcostata (4%) | | Ampelisca brevicornis (3%) | | Nemertea (3%) | | Owenia fusiformis (3%) | | Spisula sp. (3%) | | Mactra stultorum (3%) | | Onuphis eremita (2%) |
| | C | 3 | 23% | Diogenes pugilator (41%) | 15 ± 8 | 53 ± 78 | 0.8 ± 0.1 | 3.0 ± 0.6 | Slightly muddy sand (silt & clay <5%) | | Nephtys cirrosa (11%) | | Echinocardium cordatum (5%) | | Tritia reticulata (4%) | | Urothoe brevicornis (3%) | | Urothoe pulchella (3%) | | Mactra stultorum (3%) | | Scoloplos armiger (3%) |
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