Table 2 Taxa and their mean densities (ind./m2) found in the 10 surveys considered, using combinations on a higher taxonomic level if necessary (see text)
From: Community dynamics of intertidal soft-bottom mussel beds over two decades
Phylum | Class | Scientific name | 1984 | 1990 | 1993 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | r s (t) | r s (M. e .) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cnidaria | Anthozoa | Actiniaria indet. | 4.5 | 22.3 | 17.7 | 123.8 | 114.9 | 17.7 | 176.8 | 526.7 | 109.6 | 0.63, P = 0.04 | NS | |
Nemertea | Nemertini | Nemertini indet. | 41.4 | 56.5 | 62.7 | 79.6 | 44.2 | 26.5 | 44.2 | 58.9 | 415.2 | 84.9 | NS | NS |
Mollusca | Polyplacophora | Lepidochitona cinereus (L.) | 40.0 | 12.0 | 5.7 | 17.7 | 8.8 | 88.4 | 44.2 | 55.3 | 61.5 | 49.5 | 0.66, P = 0.02 | NS |
Gastropoda | Acmaea sp. | 17.7 | 26.5 | n < 5 | n < 5 | |||||||||
Crepidula fornicata (L.) | 60.0 | 4.0 | 8.8 | 26.5 | 114.9 | 353.7 | 242.2 | 74.3 | 0.69, P = 0.03 | NS | ||||
Hydrobia ulvae (Pennant) | 8.5 | 362.5 | 110.5 | 3.8 | 10.6 | NS | NS | |||||||
Littorina littorea (L.) | 270.0 | 1720.0 | 825.7 | 97.3 | 265.3 | 150.3 | 371.4 | 324.2 | 419.0 | 339.5 | NS | NS | ||
Littorina mariae/obtusata (L.) | 30.0 | 3.5 | 78.0 | 29.5 | 11.5 | NS | NS | |||||||
Littorina saxatilis (Olivi) | 132.6 | 7.4 | 10.6 | n < 5 | n < 5 | |||||||||
Patella vulgata L. | 44.2 | n < 5 | n < 5 | |||||||||||
Bivalvia | Tellinidae indet. | 14.7 | 7.1 | n < 5 | N < 5 | |||||||||
Angulus tenuis da Costa | 17.7 | 3.8 | n < 5 | n < 5 | ||||||||||
Cerastoderma edule (L.) | 11.5 | 1.3 | 8.8 | 40.5 | 3.5 | NS | NS | |||||||
Crassostrea gigas (Thunberg) | 305.8 | 484.4 | 442.1 | n < 5 | n < 5 | |||||||||
Ensis sp. | 7.7 | n < 5 | n < 5 | |||||||||||
Macoma balthica (L.) | 16.5 | 7.0 | 8.8 | 26.5 | 8.8 | 25.8 | 61.5 | 7.1 | NS | NS | ||||
Mya arenaria L. | 0.1 | 1.3 | 8.8 | 11.1 | 7.1 | NS | NS | |||||||
Mysella bidentata (Montagu) | 11.1 | 14.1 | n < 5 | n < 5 | ||||||||||
Mytilus edulis (L.) | 1355.3 | 3560.0 | 1362.3 | 1379.3 | 1078.7 | 1069.9 | 1503.1 | 1551.0 | 1114.9 | 1255.6 | NS | – | ||
Petricola pholadiformes Lamarck | 7.7 | n < 5 | N < 5 | |||||||||||
Annelida | Polychaeta | Ampharete acutifrons Grube 1860 | 5.7 | 13.5 | 37.7 | 8.8 | 17.7 | 23.1 | 23.1 | 17.7 | NS | NS | ||
Arenicola marina Linnaeus 1758 | 0.1 | n < 5 | N < 5 | |||||||||||
Bylgides sarsi (Kinberg) | 1.3 | 17.7 | 14.7 | 3.8 | 17.7 | NS | NS | |||||||
Capitella capitata Fabricius 1780 | 350.0 | 164.5 | 374.0 | 88.4 | 194.5 | 79.6 | 61.9 | 95.8 | 80.7 | 180.4 | NS | NS | ||
Cirratulidae indet. | 40.0 | 42.0 | 21.0 | 26.5 | 97.3 | 132.6 | 176.8 | 103.2 | 11.5 | 17.7 | NS | NS | ||
Eteone flava (Fabricius) | 26.5 | n < 5 | n < 5 | |||||||||||
Eteone longa (Fabricius) | 0.1 | 8.3 | 17.7 | 10.6 | n < 5 | n < 5 | ||||||||
Eulalia viridis (L.) | 8.8 | 8.8 | 8.8 | 17.7 | 3.7 | NS | NS | |||||||
Eumida sanguinea (Oersted) | 0.1 | 2.7 | n < 5 | n < 5 | ||||||||||
Gattyana cirrosa (Pallas) | 26.5 | 8.8 | 53.1 | n < 5 | n < 5 | |||||||||
Harmothoe impar Johnston | 8.8 | 3.7 | 10.6 | n < 5 | n < 5 | |||||||||
Harmothoe imbricata (L.) | 8.8 | 8.8 | 8.8 | 53.1 | 62.6 | 38.4 | 7.1 | NS | NS | |||||
Heteromastus filiformis (Claparède) | 450.0 | 540.0 | 178.0 | 114.9 | 61.9 | 459.8 | 159.2 | 196.1 | 100.5 | 70.7 | NS | NS | ||
Kefersteinia cirrata (Keferstein) | 0.1 | 5 | n < 5 | n < 5 | ||||||||||
Lanice conchilega (Pallas) | 12.0 | 44.2 | 8.8 | 159.2 | 212.2 | 114.2 | 101.1 | 77.8 | NS | NS | ||||
Lepidonotus squamatus (L.) | 4.5 | 5.3 | 17.7 | 44.2 | 35.4 | 7.4 | 3.5 | NS | NS | |||||
Malacoceros sp. | 120.0 | 964.0 | 376.6 | 0.0 | 26.5 | 132.6 | 97.3 | 320.5 | 64.3 | 49.5 | NS | NS | ||
Manayunkia aestuarina (Bourne) | 8.8 | n < 5 | n < 5 | |||||||||||
Nephtyidae indet. | 1.5 | 4.3 | 17.7 | 17.7 | 11.1 | 19.2 | 0.81, P = 0.02 | NS | ||||||
Nereididae indet. | 87.6 | 6.0 | 56.3 | 114.9 | 17.7 | 70.7 | 327.2 | 294.7 | 441.4 | 300.6 | 0.85, P < 0.05 | NS | ||
Ophelina acuminata (Oersted) | 3.5 | n < 5 | n < 5 | |||||||||||
Pectinaria koreni Malmgren | 1.3 | 3.5 | n < 5 | n < 5 | ||||||||||
Pholoe baltica Oersted | 17.7 | 8.8 | 7.4 | n < 5 | n < 5 | |||||||||
Phyllodoce sp. | 1.5 | 2.7 | 8.8 | 8.8 | 132.6 | 70.7 | 29.5 | 34.6 | 28.3 | 0.67, P = 0.02 | NS | |||
Polydora sp. | 0.1 | 5.7 | 61.9 | 168.0 | 123.8 | 1476.6 | 4572.0 | 218.9 | 802.8 | 0.85, P < 0.05 | NS | |||
Polynoidae indet | 61.9 | 8.8 | 8.8 | 26.9 | 7.7 | 53.1 | NS | NS | ||||||
Proceraea cornuta (Agassiz) | 3.7 | n < 5 | n < 5 | |||||||||||
Pygospio elegans Claparède | 22.7 | 53.1 | 97.3 | 18.4 | 19.2 | 24.8 | NS | 0.82, P = 0.02 | ||||||
Scoloplos armiger (O. F. Müller) | 11.4 | 1.5 | 2.7 | 17.7 | 14.1 | NS | NS | |||||||
Spio filicornis (O. F. Müller) | 26.5 | 114.9 | 35.4 | 3.7 | n < 5 | n < 5 | ||||||||
Spiophanes bombyx (Claparède) | 8.8 | 7.4 | 10.6 | n < 5 | n < 5 | |||||||||
Spiophanes kröyeri Grube | 3.7 | n < 5 | n < 5 | |||||||||||
Oligochaeta | Oligochaeta indet. | 2382.9 | 2424.0 | 3236.2 | 2944.4 | 4306.0 | 4783.5 | 8031.4 | 6543.1 | 8014.4 | – | – | ||
Arthropoda | Cirripedia | Balanus sp. | 849.9 | 1847.0 | 2429.3 | 4916.1 | 6498.8 | 9284.1 | 22768.0 | 18730.2 | 10214.4 | 19303.8 | 0.92, P < 0.001 | NS |
Malacostraca | Carcinus maenas (L.) | 150.0 | 551.0 | 225.3 | 371.4 | 194.5 | 495.1 | 504.0 | 736.8 | 438.3 | 417.3 | NS | NS | |
Chaetogammarus marinus Leach | 570.0 | 460.0 | 185.7 | 79.6 | 44.2 | 26.5 | 14.7 | 7.7 | −1, P = 0 | NS | ||||
Gammarus locusta (L.) | 35.4 | 8.8 | 8.8 | 8.8 | 3.7 | 3.8 | −0.88, P = 0.01 | NS | ||||||
Gammarus oceanicus Segerstråle | 168.0 | 26.5 | 17.7 | 44.2 | 73.7 | 26.9 | NS | 0.83, P = 0.02 | ||||||
Idothea balthica (Pallas) | 17.7 | n < 5 | n < 5 | |||||||||||
Jaera albifrons Leach | 100.0 | 17.0 | 46.0 | 26.5 | 61.9 | 61.9 | 44.2 | 23.1 | 19.2 | 10.6 | NS | NS | ||
Pagurus bernhardus (L.) | 8.8 | 3.8 | 3.5 | n < 5 | n < 5 | |||||||||
Pycnogonida | Nymphon sp. | 3.8 | n < 5 | n < 5 | ||||||||||
Pygnogonum littorale (Strøm) | 8.8 | n < 5 | n < 5 | |||||||||||
Echinodermata | Stelleroidea | Asterias rubens (L.) | 0.1 | 7.0 | 17.7 | 17.7 | 8.8 | 26.5 | 36.8 | 19.2 | 7.1 | NS | NS | |
Chordata | Ascidiacea | Ascidiacea indet. | 22.1 | n < 5 | n < 5 | |||||||||
Number of taxa | 23 | 25 | 31 | 39 | 29 | 30 | 34 | 45 | 37 | 38 | ||||
Number of determined speciesa | 26 (38b) | 33 | 39c | 47 | 35 | 41 | 41 | 51 | 41 | 44 | ||||