 | |||||
|
|||||
| About | Mapping | Dive list | Listed species | Pressures | Species - OTUs |
D457 Transect 42 Hydrozoan corals/bryozoans (Reteporella) on cobble/boulder reef, and outcroppings with escarpment (Desmophyllum/Lophelia) fauna, area of dense unknown yellow anthozoans, encrusting/globose sponge patch. Features of Interest: escarpment Water Depth: 681-473 m
Highlights: Lophelia & Desmophyllum dianthus Yellow sponge & yellow anthozoan Crab - Paromola cuvieri Fishing line caught in dead Lophelia Escarpment with Lophelia and Desmophyllum dianthus Lophelia tangled in fishing line Healthy Lophelia
This site is characterised by carbonate sediment in the form of platforms, cliffs, ledges and overhangs. A large amount of biological material is evident in the water column. Throughout the site the hydroid coral, stylasterid sp., is common on any available hard substrate; the echinoid Cidaris cidaris is ubiquitous throughout. Initially Madrepora oculata and Lophelia pertusa are present as small clumps, progressing up slope the density and size of the clumps increase. Areas of cliffs and overhangs have particularly dense clumps of these corals. Both white and orange colour morphotypes of these corals appear alongside each other. The undersides of overhangs have dense beds of Desmophyllum sp.; among these cup corals small hydroids and sabellids occur. Large sponges are present midway along the slope. Fish species noted at this site include Lepidion eques, blackbelly rosefish, northern cut-throat eels, greater forkbeards and chimerids.
| Progression | Start | Duration | Code | Name |
|---|---|---|---|---|
| 1 | [00:00:00] | 00:06:06 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 2 | [00:06:07] | 00:11:29 | M.AtUB.Ro.MixCor | Mixed cold water coral community on Atlantic upper bathyal rock and other hard substrata |
| 3 | [00:17:37] | 00:05:13 | M.AtMB.Ro.MixCor.DisLop | Discrete Lophelia pertusa colonies on Atlantic mid bathyal rock and other hard substrata |
| 4 | [00:22:51] | 00:02:03 | M.AtUB.Ro.MixCor | Mixed cold water coral community on Atlantic upper bathyal rock and other hard substrata |
| 5 | [00:24:55] | 00:04:04 | M.AtMB.Ro.MixCor.DisLop | Discrete Lophelia pertusa colonies on Atlantic mid bathyal rock and other hard substrata |
| 6 | [00:29:00] | 00:04:52 | M.AtUB.Ro.DeeSpo | Deep sponge aggregation on Atlantic upper bathyal rock and other hard substrata |
| 7 | [00:33:53] | 00:04:54 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 8 | [00:38:48] | 00:12:37 | M.AtUB.Ro.MixCor | Mixed cold water coral community on Atlantic upper bathyal rock and other hard substrata |
| 9 | [00:51:26] | 00:01:08 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 10 | [00:52:35] | 00:05:42 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 11 | [00:58:18] | 00:01:50 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 12 | [01:00:09] | 00:09:35 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 13 | [01:09:45] | 00:03:35 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 14 | [01:13:21] | 00:16:02 | M.AtMB.Co.UrcCom | Urchin dominated community on Atlantic mid bathyal coarse sediment |
| 15 | [01:29:24] | 00:32:09 | M.AtMB.Ro.MixCor.DisLop | Discrete Lophelia pertusa colonies on Atlantic mid bathyal rock and other hard substrata |
Unknown Hydrozoa or Annelida : 1027 : R
Porifera
Mycale lingua : 171 : O
Geodia cf. atlantica (Porifera massive lobose sp. 6) : 83 : R
Porifera encrusting (black/red) : 118 : R
Porifera encrusting globose (pale) : 75 : O
Porifera encrusting sp. 1 (white) : 1 : R
Porifera encrusting sp. 15 (yellow) : 58 : R
Porifera lamellate sp. X : 1029 : R
Porifera massive lobose sp. 30 : 982 : R
Blue Porifera encrusting : 800 : R
Cnidaria
Cerianthidae sp. 1 : 2 : R
Pachycerianthus multiplicatus : 458 : O
Unknown Anthozoa (yellow) : 1028 : O
Actiniaria sp. 13 (pink/purple) : 478 : R
Actiniaria sp. 24 : 907 : R
Halcampoididae sp. 1 : 23 : R
Phelliactis sp. 1 : 255 : R
Corallimorphidae sp. 2 : 43 : R
Desmophyllum cf. dianthus : 335 : O
Lophelia pertusa : 250 : F
Madrepora oculata : 251 : O
Zoanthidae sp. 2 : 586 : O
Gorgonacea sp. 7 (pink) cf. Isidella : 307 : O
Hydrozoa (bushy) : 50 : O
Hydrozoa (flat branched) : 56 : O
Pliobothrus sp. : 207 : F
Stylaster sp. 1 : 449 : R
Annelida
Sabellidae sp. 1 : 54 : R
Serpulidae sp. 1 : 106 : F
Arthropoda
Chaceon affinis : 254 : R
Paromola cuvieri : 304 : O
Munida sarsi : 200 : R
Paguridae sp. : 205 : R
Bathynectes sp. : 235 : O
Mysida (indet) : 1026 : O
Cirripedia sp. 1 : 82 : R
Mollusca
Colus sp. : 113 : R
Anomiidae sp. 1 : 32 : F
Margarites sp. 1 : 277 : R
Bryozoa
Reteporella sp. : 204 : R
Echinodermata
Asterias rubens : 231 : O
Ceramaster/Peltaster/Plinthaster sp. 1 : 234 : R
Ceramaster/Peltaster/Plinthaster sp. 2 : 388 : O
Porania sp. : 263 : R
Echinus sp. : 445 : R
Cidaris cidaris : 211 : C
Araeosoma fenestratum : 188 : F
Psolus squamatus : 252 : R
Parastichopus tremulus : 266 : O
Chordata
Chimaera monstrosa : 265 : O
Synaphobranchus kaupii : 440 : O
Beryx decadactylus : 1025 : O
Merlangius melangus : 1019 : R
Brosme brosme : 258 : O
Coelorinchus caelorhincus : 303 : O
Coelorinchus labiatus : 593 : R
Lepidion eques : 249 : O
Phycis blennoides : 1020 : O
Lophius piscatorius : 273 : O
Epigonus telescopus : 1018 : R
Helicolenus dactylopterus : 227 : O
Actinopterygii sp. 3 : 930 : R
Number of species = 62
© Marine Institute, MERC Consultants, Bernard Picton 2022