Distribution of marine, benthic macro-organisms at Svalbard ...

A table has been prepared giving species (Table 1) found in 15 or more zones.
Table 1. Species found in 15 or more zones (The number indicate number of registrations of
the species in the zone)
SPECIES_NAME 1.1 1.2 1.3 1.4 1.5 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.1 4.1 4.2 5 6 No.
zones
Hiatella arctica 13 5 8 76 22 22 26 15 11 5 20 5 4 38 16 5 11 3 37 19
Ophiopholis aculeata 39 2 4 59 37 33 80 11 15 25 35 5 2 103 14 6 29 36 47 19
Strongylocentrotus
droebachiensis
44 1 10 163 40 86 129 15 41 61 49 5 49 125 22 4 51 14 56 19
Balanus balanus 38 12 8 120 78 74 90 14 56 48 69 4 2 5 33 9 57 43 18
Lebbeus polaris 11 5 1 70 38 80 34 25 10 24 9 2 12 17 4 15 1 4 18
Chlamys islandica 9 4 32 19 25 6 7 14 3 4 1 1 10 8 1 3 2 28 18
Ophiacantha bidentata 15 2 2 45 3 6 12 1 1 3 21 1 4 75 5 29 13 13 18
Urticina felina 36 6 112 72 15 29 26 9 10 22 4 16 27 30 53 28 2 17
Pagurus pubescens 14 1 8 38 4 3 2 2 3 2 3 1 1 4 3 1 24 17
Sclerocrangon boreas 8 2 5 64 4 6 4 1 4 4 2 6 4 3 5 1 1 17
Margarites helicinus 1 1 1 21 2 9 11 3 1 1 16 5 6 8 9 15 12 17
Hormathia nodosa 11 1 29 58 1 11 1 5 9 47 3 10 21 26 38 1 16
Terebellides stroemi 4 1 3 10 4 1 1 1 1 4 2 1 11 4 4 1 16
Thelepus cincinnatus 8 1 1 2 2 3 5 2 2 2 5 10 1 4 1 1 16
Tonicella marmorea 6 1 41 28 46 80 13 26 25 16 6 5 31 3 15 2 16
Tonicella rubra 13 3 77 25 28 51 8 27 9 24 2 22 20 7 1 1 16
Erginus rubellus 13 26 7 16 40 5 8 8 25 2 4 2 2 7 7 12 16
Margarites striatus 11 3 5 37 8 19 10 2 8 11 1 6 3 10 10 12 16
Mya truncata 11 9 103 9 13 19 4 10 30 17 17 14 31 4 31 31 16
Crossaster papposus 11 12 5 12 6 1 1 3 6 2 3 17 3 11 5 4 16
Ophiura sarsii 11 2 26 1 4 3 11 7 3 42 4 8 3 3 16 46 16
Halocynthia pyriformis 4 1 3 16 12 32 1 16 21 6 1 3 1 1 1 1 16
Dendrodoa aggregata 4 5 6 3 41 5 4 16 4 7 3 43 4 33 77 1 16
Hyas araneus 13 3 6 18 7 5 5 3 3 2 1 4 5 7 4 15
Hyas coarctatus 15 1 14 10 4 2 3 3 2 3 2 1 4 7 46 15
Pandalus borealis 13 1 25 8 1 1 2 3 1 2 10 4 1 1 3 15
Ischnochiton albus 3 1 15 1 1 1 6 2 1 4 4 5 3 1 1 15
Bathyarca glacialis 1 23 6 1 3 1 1 3 2 2 6 1 8 1 2 15
Heliometra glacialis 15 2 22 3 4 6 10 3 9 3 14 3 14 4 5 15
Ctenodiscus crispatus 3 1 30 2 2 5 5 7 3 1 6 18 3 12 2 15
Ophiocten sericeum 12 1 3 81 3 3 5 3 3 3 13 2 24 4 8 15
Boltenia echinata 3 1 2 5 20 1 9 8 3 1 1 1 3 1 1 15
Styela rustica 5 4 1 4 5 48 11 23 21 1 1 2 3 1 2 15
A total of 33 species have been recorded in 15 or more zones (Table 1). In this regard, it is of
little interest to note the absence of records of a particular species in a zone where the
sampling intensity is low, as long as the species is present in the neighbouring zones. In these
cases, there is a high probability that the species also is present in this zone.
However, it is of interest to note if a species is lacking in a zone with high sampling intensity.
Such is the case with Jan Mayen. Some species which are common at Svalbard have not been
recorded at Jan Mayen. Examples of such distribution are the crustaceans Balanus balanus
and Hyas araneus and Hyas coarctatus, the sea anemone Hormathia nodosa, the ascidians
Halocynthia pyriformis and Boltenia echinata and the echinoderm Ctenodiscus crispatus.
The lack of the latter species probably can be explained by the lack of the preferred bottom
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