Physiography and Bathymetry of the Arctic Ocean seafloor

Weber, J.

doi:10.1007/978-1-4613-0677-1_29

Cited by 13 publications

(4 citation statements)

References 37 publications

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“…1). In a steep assemblages, identify key species, characterize the descent of 20 to 65 m km-', water depths increase from community in terms of diversity and abundance, and 200 to 2800 m within 60 km (Weber 1989). Sea floor imdetermine the combination of environmental factors ages were taken during the expedition ARK X/1 of RV which are most likely to influence fauna1 groupings.…”

Section: Introductionmentioning

confidence: 99%

Epibenthic community patterns on the continental slope off East Greenland at 75* N

Mayer¹,

Piepenburg²

1996

Mar. Ecol. Prog. Ser.

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ABSTRACT. Megabenthic assemblages on the East Greenland continental slope at 75" N were surveyed at 8 locations between 190 and 2800 m depth using sea floor images taken vertically with a still camera. A total of 91 epibenthic species with 14447 indiv~duals were identified from 422 photographs depicting 297 n12 of the sea floor. Classification and ordination analysis defined 3 fauna1 zones that corresponded to different depth regions of the continental margin: shelf break, upper slope and lower slope. Megafaunal abundance was highest on the shelf (about 200 ind. m-2). In the other zones, the densities were distinctly lower (15 to 30 ind. m-2). Assemblages were frequently dominated by 1 or 2 species, such a s the polychaete Onuphis conchylega at the shelf break and the sponge Polymastia sp. at the lower slope The upper slope was characterized by a diverse octocoral-sponge assemblage. A statistical analysis of the correlation between megafaunal and environmental data at a 10 km scale (between stations) indicated that epibenthic distribution patterns were best explained by sea floor characteristics, whereas no evidence for a direct benthic-pelaglc coupling was found, irrespective of water depth. Additionally, the withln-station distribution of megabenthic organisms (100 m scale) was clearly affected by sea floor properties.

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Section: Introductionmentioning

confidence: 99%

Epibenthic community patterns on the continental slope off East Greenland at 75* N

Mayer¹,

Piepenburg²

1996

Mar. Ecol. Prog. Ser.

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“…Within the study area, possible reasons for the described boundary can be associated with peculiar geomorphology of the shelf-slope area and the hydrological regime. The Siberian shelf is one of the widest in the world, up to 800 km ( Weber, 1989 ). In addition, it is characterized by a strong fresh water outflow ( Flint et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Vertical zonation of the Siberian Arctic benthos: bathymetric boundaries from coastal shoals to deep-sea Central Arctic

Vedenin

Galkin

Миронов

et al. 2021

PeerJ

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The bathymetric distribution of species of Annelida, Crustacea and Echinodermata from the region including the Kara, Laptev and East Siberian seas and the adjacent region of the deep-sea Central Arctic was analysed. We focused on vertical species ranges revealing zones of crowding of upper and lower species range limits. Using published data and in part the material obtained during the expeditions of the P.P. Shirshov Institute of Oceanology, we evaluated species vertical distribution from 0 m to the maximum depth of the Central Arctic (~4,400 m). The entire depth range was divided into smaller intervals; number of upper and lower limits of species depth ranges was counted and plotted to visualize the range limits crowding. Several zones of crowding of vertical species range limits were found for all analysed macrotaxa. The most significant zones occurred at depths of 450–800 m and 1,800–2,000 m. The first depth zone corresponds to the boundary between the sublittoral and bathyal faunas. The last one marks the boundary between the bathyal and abyssal faunas. Depths of these boundaries differ from those reported from other Ocean regions; possible explanations of these differences are discussed.

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“…The impact of the freshwater inflow, the ice movements and the summer heating is especially severe in the large shallow-water areas along the coast. The bottom here comprises spacious plains covered with mud and clay (Herman, 1974;Weber, 1989). Due to the unstable environment, both in the water body and on the seabed, the biodiversity, especially the diversity of sessile macrobenthos, of these areas is considerably poorer than along the coasts of the Nordic Seas (Golikov & Scarlato, 1989).…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, in the offshore areas of the Siberian Seas the salinity is more stable, a branch of the Atlantic current brings warm water to the deep (Coachman & Aagaard, 1974), and the northern coast of large offshore archipelagos, e.g. Severnaya Zemlya and New Siberian Islands, is characterized by the rock cliffs and steep slopes running to great depths (Herman, 1974;Weber, 1989). These areas are oases hosting a relatively rich bottom fauna, particularly some diverse sponge communities (Golikov et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas

Plotkin¹,

Gerasimova²,

Rapp³

2017

J. Mar. Biol. Ass.

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Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas are revised and compared with the related species of the North Atlantic based on the morphological data from the type and comparative material and the molecular data from fresh samples. Twenty species from six polymastiid genera are recorded. Two species, Polymastia svenseni from Western Norway and Spinularia njordi from the Norwegian Sea, are new to science. One species, Polymastia andrica, is new to the Nordic Seas and two species, Polymastia cf. bartletti and P. penicillus, are new to the Scandinavian Coast. Distribution of the polymastiids in the North Atlantic and Arctic is discussed and the allegedly wide distribution of Spinularia sarsii and S. spinularia is questioned.

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Physiography and Bathymetry of the Arctic Ocean seafloor

Cited by 13 publications

References 37 publications

Epibenthic community patterns on the continental slope off East Greenland at 75* N

Epibenthic community patterns on the continental slope off East Greenland at 75* N

Vertical zonation of the Siberian Arctic benthos: bathymetric boundaries from coastal shoals to deep-sea Central Arctic

Polymastiidae (Porifera: Demospongiae) of the Nordic and Siberian Seas

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