Macrobenthos of the Ob River estuarine zone and of the adjacent regions of the Kara Sea

Galkin, Sergey; Kucheruk, N. V.; Minin, K. V.; Rayskiy, A K; Goroslavskaya, E I

doi:10.1134/s0001437010050152

Cited by 9 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is a typical situation for the zones influenced by the river runoff. Galkin et al (2010) report that in all the previous trawl samplings from the Ob Bay, the two-three dominating taxa made up 85-99 % of the whole biomass.…”

Section: Species Compositionmentioning

confidence: 97%

“…and isopods Saduria entomon). Further north, several species of bivalve dominate, especially Portlandia arctica (Lubina 2000; Denisenko et al 2003;Galkin et al 2010). Further out from the bays, the cumacean Diastylis sulcata is very abundant, even dominant in some places (Deubel et al 2003).…”

Section: Introductionmentioning

confidence: 96%

“…Grabs usually underestimate the role of large-sized and rare species, while trawls may underestimate the role of small-sized abundant species. The main reason for this difference is the unequal sampling area of the two gears (Galkin 1998;Galkin et al 2010). …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Macrobenthos of the Ob Bay and adjacent Kara Sea shelf

2015

View full text Add to dashboard Cite

The southeastern part of Kara Sea is a highly dynamic area influenced by freshwater masses of Ob and Yenisei rivers. It is possible to estimate the annual changes of bottom communities in such areas by studying the temporal and spatial distribution of benthic organisms. In the previous studies of the same areas, the communities differing essentially in the composition and abundance were described mainly due to the different sampling methods employed and possible temporal changes in the macrobenthos. The aims of this study were to redescribe the benthic communities in the area of the Ob Bay and the adjacent Kara Sea shelf by using trawl and grabs, to compare the results obtained with these gears with each other and to reveal the environmental factors influencing the macrobenthos. Samples were taken along the transect from the northern half of the Ob Bay to the central part of the Kara Sea. Total biodiversity generally increased toward the open shelf regions. The data obtained only partly confirmed the previously recorded trend of gradual substitution of crustacean communities by communities dominated by bivalves and echinoderms. Three community complexes were distinguished in the studied area-the freshwater, the brackish-water and the marine. The contact area of the brackish-water and the marine complexes demonstrated the gradual transition. Salinity, correlated with the temperature, was the most important environmental factor influencing the benthic communities along the Ob Bay. The other factors were the sediment structure and depth.

show abstract

Section: Species Compositionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Macrobenthos of the Ob Bay and adjacent Kara Sea shelf

2015

View full text Add to dashboard Cite

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%

“…The maximum productivity of the brackish water phytoplankton in the frontal zone is reached in summer when turnover of nutrients coming from dying off freshwater phytoplankton cells is particularly high (Lapin, ). Processes in the estuarine front of the Ob Gulf result in the enhanced biomass of estuarine zooplankton at the inshore periphery of the estuarine front (Vinogradov et al, ) and high benthic biomass at the marine side of the front (Denisenko, Sandler, Denisenko, & Rachor, ; Galkin et al, ; Stepanova, ). Along with the ice regime (extensive landfast ice and a flaw polynya, see Figure b) they also profoundly influence feeding and migration behaviour of fish and marine mammals (UNEP/CBD/EBSA/WS, ).…”

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