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Wehkamp, Stephanie; Fischer, Philipp (2013): Crustaceans and fish abundances and species at and around artificially introduced tetrapod fields in the southern North Sea, 2009. doi:10.1594/PANGAEA.821909,
Supplement to: Wehkamp, S; Fischer, P (2013): Impact of hard-bottom substrata on the small-scale distribution of fish and decapods in shallow subtidal temperate waters. Helgoland Marine Research, 67(1), 59-72, doi:10.1007/s10152-012-0304-5

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The micro-scale spatial distribution patterns of a demersal fish and decapod crustacean assemblage were assessed in a hard-bottom kelp environment in the southern North Sea. Using quadrats along line transects, we assessed the in situ fish and crustacean abundance in relation to substratum types (rock, cobbles and large pebbles) and the density of algae. Six fish and four crustacean species were abundant, with Ctenolabrus rupestris clearly dominating the fish community and Galathea squamifera dominating the crustacean community. Differences in the substratum types had an even stronger effect on the micro-scale distribution than the density of the dominating algae species. Kelp had a negative effect on the fish abundances, with significantly lower average densities in kelp beds compared with adjacent open areas. Averaged over all of the substrata, the most attractive substratum for the fish was large pebbles. In contrast, crustaceans did not show a specific substratum affinity. The results clearly indicate that, similar to other complex systems, significant micro-scale species-habitat associations occur in northern hard-bottom environments. However, because of the frequently harsh environmental conditions, these habitats are mainly sampled from ships with sampling gear, and the resulting data cannot be used to resolve small-scale species-habitat associations. A detailed substratum classification and community assessment, often only possible using SCUBA diving, is therefore important to reach a better understanding of the functional relationships between species and their environment in northern temperate waters, knowledge that is very important with respect to the increasing environmental pressure caused by global climate change.
Median Latitude: 54.193067 * Median Longitude: 7.878327 * South-bound Latitude: 54.192530 * West-bound Longitude: 7.877530 * North-bound Latitude: 54.193700 * East-bound Longitude: 7.879000
Date/Time Start: 2009-06-14T12:00:00 * Date/Time End: 2009-09-18T12:00:00
Helgoland_TMI * Latitude: 54.192970 * Longitude: 7.878450 * Location: German Bight, North Sea * Campaign: Helgoland * Basis: Meeresstation Helgoland * Device: Sampling by diver (DIVER)
Helgoland_TN * Latitude: 54.193700 * Longitude: 7.877530 * Location: German Bight, North Sea * Campaign: Helgoland * Basis: Meeresstation Helgoland * Device: Sampling by diver (DIVER)
Helgoland_TS * Latitude: 54.192530 * Longitude: 7.879000 * Location: German Bight, North Sea * Campaign: Helgoland * Basis: Meeresstation Helgoland * Device: Sampling by diver (DIVER)
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
3Latitude of eventLatitude
4Longitude of eventLongitude
5Sample code/labelLabelWehkamp, Stephaniecounting
6DirectionDirectiondegWehkamp, Stephanie
7DistanceDistancemWehkamp, Stephanie
8Temperature, waterTemp°CWehkamp, Stephanie
9VisibilityVisibmWehkamp, Stephanie
10TideTideWehkamp, Stephanie
11LaminariaLaminaria#Wehkamp, Stephanie0=0-4, 1=5-9, 2=>10
12CommentCommentWehkamp, Stephanie
13Gadus morhuaG. morhua#Wehkamp, Stephanie
14Trisopterus luscusT. luscus#Wehkamp, Stephanie
15Pollachius pollachiusP. pollachius#Wehkamp, Stephanie
16Pollachius virensP. virens#Wehkamp, Stephanie
17Raniceps raninusR. raninus#Wehkamp, Stephanie
18Ciliata mustelaC. mustela#Wehkamp, Stephanie
19Spinachia spinachiaS. spinachia#Wehkamp, Stephanie
20Entelurus aequoreusE. aequoreus#Wehkamp, Stephanie
21Nerophis ophidionN. ophidion#Wehkamp, Stephanie
22Myoxocephalus scorpiusM. scorpius#Wehkamp, Stephanie
23Taurulus bubalisT. bubalis#Wehkamp, Stephanie
24Agonus cataphractusA. cataphractus#Wehkamp, Stephanie
25Callionymus lyraC. lyra#Wehkamp, Stephanie
26Cyclopterus lumpusC. lumpus#Wehkamp, Stephanie
27Liparis spp.Liparis spp.#Wehkamp, Stephanie
28Trachurus trachurusT. trachurus#Wehkamp, Stephanie
29Labrus bergyltaL. bergylta#Wehkamp, Stephanie
30Ctenolabrus rupestrisC. rupestris#Wehkamp, Stephanie
31Zoarces viviparusZ. viviparus#Wehkamp, Stephanie
32Pholis gunnellusP. gunnellus#Wehkamp, Stephanie
33Pomatoschistus flavescensP. flavescens#Wehkamp, Stephanie
34Pomatoschistus minutusP. minutus#Wehkamp, Stephanie
35PleuronectidaePleuronectidae#Wehkamp, Stephanie
36Fish larvaeFish larvae#Wehkamp, Stephanie
37Homarus gammarusH. gammarus#Wehkamp, Stephanie
38Pilumnus hirtellusP. hirtellus#Wehkamp, Stephanie
39Pisidia longicornisP. longicornis#Wehkamp, Stephanie
40Hyas araneusH. araneus#Wehkamp, Stephanie
41Galathea squamiferaG. squamifera#Wehkamp, Stephanie
42Pagurus bernhardusP. bernhardus#Wehkamp, Stephanie
43Cancer pagurusC. pagurus#Wehkamp, Stephanie
44Carcinus maenasC. maenas#Wehkamp, Stephanie
45Liocarcinus spp.Liocarcinus spp.#Wehkamp, Stephanie
46Necora puberN. puber#Wehkamp, Stephanie
7465 data points

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