Benthic fauna in the pechora sea

Dahle, S.; Denisenko, Stanislav G; Денисенко, Н. В.; Cochrane, Sabine J.

doi:10.1080/00364827.1998.10413681

Cited by 45 publications

(32 citation statements)

References 12 publications

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“…The present study, as well as the results by Dahle et al (1998), indicates great variability in the spatial distribution of zoobenthos in the area, mostly agreeing with the early data presented by Brotskaya & Zenkevich (1939). The high diversity (H ' = 2 to 5), based on the present material and that by Dahle et al (1998), suggests stability of the local benthic communities in most parts of the Pechora Sea.…”

Section: Diversity and Community Structuresupporting

confidence: 93%

“…The high diversity (H ' = 2 to 5), based on the present material and that by Dahle et al (1998), suggests stability of the local benthic communities in most parts of the Pechora Sea. The values are also similar to those recorded in some other Arctic sea areas (White Sea: Babkov & Golikov 1985;Canadian shelf: Stewart et al 1985;Greenland fjords: Sejr et al 2000;Chukchi and Bering Seas: Grebmeier et al 1989).…”

Section: Diversity and Community Structuresupporting

confidence: 60%

“…Although the total number of taxa (712) reported here at 87 stations include 505 species, they represent only ~35% of that observed in the whole Barents Sea area (Zenkevich 1963, Sirenko 1998, the Pechora Sea can be regarded as considerably species-rich. The high number of taxa in this study compared with other reports from this area (Zenkevich 1927, Dahle et al 1998) may be explained by the much greater number of stations studied and by the high accuracy of species determination. The high species richness observed in the area is probably a reflection of the influence of different water masses (the Arctic, Atlantic and coastal run-off water) and bottom topography.…”

Section: Diversity and Community Structurementioning

confidence: 39%

“…The Pechora Sea forms a mixing zone of 4 main water masses: (1) coastal freshwater run-off in the south, (2) Atlantic water in the central part, (3) Barents Sea water in the Prinovozemelskiy Trough, and (4) Arctic water intruding from the Kara Gate strait and flowing northwards along the coast of the Novaya Zemlya (Ilyin & Matishov 1992, also concisely reviewed in Dahle et al 1998).…”

Section: Oceanography and Ice Conditionsmentioning

confidence: 99%

“…The material collected during later surveys, carried out in 1959 and 1970, has only partly been used in publications by different authors (Galkin 1964, Khodkina 1964, Streltzov 1966, Antipova 1973. In the beginning of the 1990s, modern methods to determine macrozoobenthic associations and to estimate their relationships with environmental factors in the Pechora Sea were applied by Dahle et al (1998). This study was, however, based only on a small number of sampling stations, and the methods used were incomparable with previous Russian studies.…”

Section: Introductionmentioning

confidence: 99%

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Macrozoobenthos of the Pechora Sea (SE Barents Sea): community structure and spatial distribution in relation to environmental conditions

Denisenko¹,

Денисенко²,

Lehtonen³

et al. 2003

Mar. Ecol. Prog. Ser.

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Extensive investigations on macrozoobenthic communities of the Pechora Sea (SE Barents Sea), carried out between 1991 and 1995, indicate that it is rich in terms of diversity, with a total of 712 taxa observed (505 identified to species level). Biomass distribution of zoobenthos varied greatly (2.6 to 1200 g m -2 wet wt). Average values recorded for the offshore areas are high for an Arctic environment, implying that the influence of the large Pechora River may extend far into the offshore area. In addition, intensive sedimentation of organic matter during the retreat of the highly productive ice-edge zone in the summer may also contribute to the observed high biomass. A method combining the abundance and biomass values of species was used to calculate an index approximating the production of each species. This index was used to distinguish the different community types in the area. In the study area, 13 benthic community types were identified, of which 2 main types covered most of the offshore areas. The concentration of total organic carbon (TOC) in the sediment was shown to have a strong influence on the diversity of the benthic communities, while both TOC and water depth affected the distribution of communities and the feeding mode of the dominant species. A community type consisting of surface deposit-feeders is the most widely distributed type in the area. Suspension feeders, however, dominate an extensive shallow offshore area. Boreal-Arctic species show a marked predomination (68.9%) in the whole Pechora Sea. The share of Arctic species is greater in the northern part influenced by cold water currents, while boreal species predominate in areas affected by warmer coastal waters. These observations indicate that the Pechora Sea functions as a transitional zone between boreal and Arctic biogeographic regions.KEY WORDS: Arctic · Biogeography · Community structure · Diversity · Macrozoobenthos · Pechora SeaResale or republication not permitted without written consent of the publisher

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Section: Diversity and Community Structuresupporting

confidence: 93%

Section: Diversity and Community Structuresupporting

confidence: 60%

Section: Diversity and Community Structurementioning

confidence: 39%

Section: Oceanography and Ice Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Macrozoobenthos of the Pechora Sea (SE Barents Sea): community structure and spatial distribution in relation to environmental conditions

Denisenko¹,

Денисенко²,

Lehtonen³

et al. 2003

Mar. Ecol. Prog. Ser.

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Integrated study of benthic foraging resources for Atlantic walrus (Odobenus rosmarus rosmarus) in the Pechora Sea, south‐eastern Barents Sea

Gebruk

Mikhaylyukova

Mardashova

et al. 2020

Aquatic Conservation

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The Atlantic walrus, Odobenus rosmarus rosmarus, forms a herd of nearly 4,000 heads in the Pechora Sea (south‐eastern Barents Sea). The Near Threatened status of O. rosmarus rosmarus and the relative isolation of the Pechora Sea population, as well as the potential impacts of human activities in the area, make it important to characterize key habitats, including feeding grounds, in order to protect the species. The aim of the present study was to integrate multiple sources of environmental and biological data collected by satellite telemetry, remotely operated vehicle (ROV), and benthic grab sampling to examine the distribution and diversity of benthic foraging resources used by walrus in the Pechora Sea. Analysis of satellite telemetry data from seven males tagged on Vaigach Island helped to identify areas of high use by walruses near haulout sites on Matveev and Vaigach islands, and in between. Field data were collected from those feeding grounds in July 2016 using ROV video recordings and bottom grab sampling. Analysis of 19 grab stations revealed a heterogeneous macrobenthic community of 133 taxa with a mean biomass of 147.11 ± 7.35 g/m2. Bivalve molluscs, particularly Astarte borealis, Astarte montagui, and Ciliatocardium ciliatum, dominated the overall macrobenthic biomass, making up two‐thirds of the total. Analysis of 16 ROV video transects showed high occurrences of mobile benthic decapods (3.03 ± 2.74 ind./min) and provided the first direct evidence that areas actively used by walrus in the Pechora Sea overlap with the distribution of the non‐native omnivorous snow crab, Chionoecetes opilio. Integrating multiple data sources provides an early foundation for the kinds of ecosystem‐based approaches needed to improve Pechora Sea resource management and to underpin Russia’s nascent marine spatial planning initiatives. Factors that need to be considered in marine spatial planning include impacts on benthic feeding grounds from offshore oil and gas development and the spread of the snow crab.

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References

Stein

Macdonald²

2004

The Organic Carbon Cycle in the Arctic Ocean

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Benthic fauna in the pechora sea

Cited by 45 publications

References 12 publications

Macrozoobenthos of the Pechora Sea (SE Barents Sea): community structure and spatial distribution in relation to environmental conditions

Macrozoobenthos of the Pechora Sea (SE Barents Sea): community structure and spatial distribution in relation to environmental conditions

Integrated study of benthic foraging resources for Atlantic walrus (Odobenus rosmarus rosmarus) in the Pechora Sea, south‐eastern Barents Sea

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