Table 1 Mean percentage cover of species within communities I–VI
From: Community composition of the rocky intertidal at Helgoland (German Bight, North Sea)
| Â | I | II | III | IV | V | VI |
|---|---|---|---|---|---|---|
Thoracica (Cr) | 0.01 | 0.75 | 0.29 | 0.86 | 0.00 | 20.00 |
Blidingia minima (Ch) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 17.00 |
Fucus spiralis (Ph) | 0.86 | 0.26 | 0.00 | 1.43 | 0.00 | 15.00 |
Porphyra spp. (Rh) | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 5.25 |
Ulva spp. (Chloro) | 59.24 | 0.58 | 0.02 | 0.14 | 3.77 | 1.25 |
Fucus serratus (Ph) | 14.03 | 34.90 | 79.67 | 79.71 | 26.36 | 0.00 |
EL-Phymatolithon lenormandii (Rh) | 0.60 | 24.28 | 34.06 | 40.71 | 9.32 | 0.00 |
Chondrus crispus (Rh) | 0.53 | 20.13 | 15.59 | 6.36 | 13.00 | 0.00 |
Cladophora rupestris (Ch) | 0.08 | 0.58 | 2.92 | 26.71 | 16.59 | 20.00 |
Rhodothamniella floridula (Rh) | 0.03 | 0.01 | 0.00 | 2.79 | 16.55 | 2.50 |
Spongomorpha arcta (Ch) | 0.05 | 0.00 | 0.00 | 0.00 | 10.27 | 0.00 |
Tubicolous organisms (An/Cr) | 0.80 | 0.56 | 0.54 | 0.29 | 4.91 | 0.00 |
Ulva lactuca (Ch) | 4.06 | 0.35 | 2.38 | 0.14 | 27.18 | 0.00 |
EL-Cryptosula pallasiana (Br) | 0.00 | 0.01 | 0.26 | 15.86 | 0.00 | 0.00 |
Dynamena pumila (Cn) | 0.00 | 0.08 | 0.66 | 4.14 | 0.18 | 1.00 |
Ascophyllum nodosum (Ph) | 0.00 | 0.00 | 0.00 | 44.93 | 0.00 | 30.00 |
Corallina officinalis (Rh) | 0.01 | 0.56 | 7.67 | 0.00 | 3.67 | 0.00 |
Rhizoclonium tortuosum (Ch) | 0.22 | 21.50 | 0.73 | 0.00 | 0.00 | 0.00 |
Mytilus edulis (Bi) | 0.04 | 5.91 | 1.20 | 0.14 | 0.05 | 0.00 |
Littorina littorea (Ga) | 0.19 | 5.68 | 0.97 | 0.00 | 0.09 | 0.00 |
EL-Ralfsia verrucosa (Ph) | 4.03 | 16.85 | 1.00 | 0.00 | 0.05 | 0.00 |
Bare rock | 32.63 | 22.06 | 20.10 | 2.57 | 17.73 | 25.00 |
Total species richness | 34 | 44 | 60 | 32 | 37 | 11 |