Macrobenthos of the Ob Bay and adjacent Kara Sea shelf

Vedenin, Andrey; Galkin, Sergey; Kozlovskiy, V. V.

doi:10.1007/s00300-014-1642-3

Cited by 35 publications

(26 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A number of published studies on macrofauna on the Siberian shelf showed an increase of species richness and diversity from the upper shelf to the shelf edge [48,59–62]. Besides the explanation of this peak in diversity and richness by the “polar emergence” theory explained above, we also suggest that food availability by higher productivity of the ice margin zone is a key factor.…”

Section: Discussionsupporting

confidence: 62%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Vedenin

Gusky

Gebruk

et al. 2018

Preprint

View full text Add to dashboard Cite

24Permanent ice coverage and the low primary production in the mostly ice-covered Central Arctic 25 ocean basins result in significantly lower biomass and density of macrobenthos in the abyssal 26 plains compared to the continental slopes. However, little is known on bathymetric and regional 27 effects on macrobenthos diversity. This study synthesizes new and available macrobenthos data 28 to provide a baseline for future studies of the effects of Arctic change on macrofauna community 29 composition in the Arctic basins. Samples taken during three expeditions (in 1993, 2012 and 30 2015) at 37 stations on the slope of the Barents and Laptev Seas and in the abyssal of the Nansen 31 and Amundsen Basins in the depth range from 38 m to 4381 m were used for a quantitative 32 analysis of species composition, abundance and biomass. Benthic communities clustered in five 33 depth ranges across the slope and basin. A parabolic pattern of species diversity change with 34 depth was found, with the diversity maximum for macrofauna at the shelf edge at depths of 100-35 300 m. This deviates from the typical species richness peak at mid-slope depths of 1500-3000 m 36 in temperate oceans. Due to the limited availability of standardized benthos data, it remains 37 difficult to assess the massive sea ice retreat observed in the past decade has affected benthic 38 community composition. The polychaete Ymerana pteropoda and the bryozoan Nolella sp. were 39 found for the first time in the deep Nansen and Amundsen Basins, as a potential first sign of 40 increasing productivity and carbon flux with the thinning ice. 41 expeditions in 1993 and 1995, nine bathymetric transects were made at the northern slopes of 69 Barents, Kara and Laptev Seas from shelf to abyssal depths. Results of these surveys were partly 70 published by [11], [15] and [16]. The present study provides additional analyses of legacy 71 samples from these expeditions and adds a substantial number of new data from surveys during 72 the sea-ice minimum in 2012 [6,17]. 73 Patterns of bathymetric distribution of benthic fauna were previously reviewed for different 74 temperate and tropical ocean regions [18][19][20][21][22][23]. According to generally recognised patterns, the 75 density and the biomass of macrobenthos decrease with depth due to the declining flux of 76 particulate matter as main food supply. In contrast, species diversity shows a parabolic pattern 77 with a maximum at depths of 1500-3000 m [24][25][26][27]. In the Arctic, the known species diversity of 78 around 1100 taxa does not appear to follow this pattern, and no mid-depth peak of diversity was 79 yet detected, potentially due to the strongly limited food supply (summarised in [28]). 80This hypothesis is supported by recent studies of horizontal distribution patterns of 81 macrofauna within the deep-sea Central Arctic. From the shelf to the deep-sea basins, food 82 supply is declining not only because of increasing water depth, but also because northwards, the 83 sun angle and the sea-i...

show abstract

Section: Discussionsupporting

confidence: 62%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Vedenin

Gusky

Gebruk

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…A number of published studies on macrofauna on the Siberian shelf showed an increase of species richness and diversity from the upper shelf to the shelf edge [ 48 , 62 – 65 ]. Besides the explanation of this peak in diversity and richness by the “polar emergence” theory explained above, we also suggest that food availability by higher productivity of the marginal ice zone is a key factor.…”

Section: Discussionmentioning

confidence: 99%

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

et al. 2018

View full text Add to dashboard Cite

Permanent sea-ice cover and low primary productivity in the mostly ice-covered Central Arctic ocean basins result in significantly lower biomass and density of macrobenthos in the abyssal plains compared to the continental slopes. However, little is known on bathymetric and regional effects on the macrobenthos diversity. This study synthesizes new and available macrobenthos data to provide a baseline for future studies of the effects of Arctic change on macrofauna community composition in the Arctic basins. Samples collected during three expeditions (in 1993, 2012 and 2015) at 37 stations on the slope of the Barents and Laptev Seas and in the abyssal of the Nansen and Amundsen Basins in the depth range from 38 m to 4381 m were used for a quantitative analysis of species composition, abundance and biomass. Benthic communities clustered in five depth ranges across the slope and basin. A parabolic pattern of species diversity change with depth was found, with the diversity maximum for macrofauna at the shelf edge at depths of 100–300 m. This deviates from the typical species richness peak at mid-slope depths of 1500–3000 m in temperate oceans. Due to the limited availability of standardized benthos data, it remains difficult to assess if and how the significant sea-ice loss observed in the past decade has affected benthic community composition. The polychaete Ymerana pteropoda and the bryozoan Nolella sp. were found for the first time in the deep Nansen and Amundsen Basins.

show abstract

“…In the southern Kara Sea the Ob–Yenissean mouth CPA (area 26, Figure a) ecosystem provides an example of an ecosystem governed by river runoff and advection of transformed riverine waters and estuarine fronts. Taxonomic diversity and biomass of communities follow the actual (for plankton) and averaged over time (for benthos) salinity gradient (Galkin, Kucheruk, Minin, Raiskyi , & Goroslavskaya, ; Polyak et al, ; Stepanova, ; Vedenin, Galkin, & Kozlovsky, ; Vinogradov, Shushkina, Lebedeva, & Gagarin, ). The main estuarine front is located in the mouth of the Ob Gulf and extends offshore to a distance of about 100 km.…”

Section: Discussionmentioning

confidence: 99%

Importance of oceanographical background for a conservation priority areas network planned using MARXAN decision support tool in the Russian Arctic seas

Спиридонов

Solov’yev

Chuprina

et al. 2017

Aquatic Conservation

View full text Add to dashboard Cite

Abstract1. The aim of the present study is to assess a conservation priority area (CPA) network proposed for the Russian Arctic seas (47 areas) with regard to underlying oceanographical features and to discuss further development of marine conservation planning.2. The oceanographical features included in the analysis were obtained from the literature or inferred from schemes of climatic oceanography.3. The most frequent oceanographic feature associated with a particular CPA is constant advection of a particular water mass, followed by local water mass transformation, seasonal ice zones, flaw polynyas, and external sources of nutrients. Particularly important are major frontal zones, and coastal phenomena such as coastal/offshore waters transition zones, massifs of fast ice and specific regimes of semi-isolated fjords and bays.4. Each Arctic sea in the study area or its large part (in the Barents Sea) is characterized by a distinct combination of oceanographical features associated with the respective CPAs.5. Although most oceanographical features were not involved in the process of developing the CPA network directly, the resulting CPAs are shown to have a solid oceanographical background.

show abstract

Macrobenthos of the Ob Bay and adjacent Kara Sea shelf

Cited by 35 publications

References 18 publications

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Spatial distribution of benthic macrofauna in the Central Arctic Ocean

Importance of oceanographical background for a conservation priority areas network planned using MARXAN decision support tool in the Russian Arctic seas

Contact Info

Product

Resources

About