Diatoms and aquatic palynomorphs in surface sediments of the White Sea bays as indicators of sedimentation in marginal filters of rivers

Polyakova, Ye. I.; Novichkova, Ye. A.; Lisitzin, A. P.; Шевченко, В. П.; Кравчишина, М. Д.

doi:10.1134/s000143701602017x

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…In the winter of 2017-2018, the total diatom concentrations were the lowest during the year, decreasing from 210.7 × 10 3 valves g −1 to 153.5 × 10 3 valves g −1 . At the same time, the relative abundance of Coscinodiscus radiatus in the diatom assemblages, which is an indicator of the Atlantic waters advection into the western Arctic seas [25,60], decreased from 64 to 23%. The winter diatom flux values varied from 61.7 to 21.6 × 10 3 valves m −2 day −1 , consistently decreasing by three times from December to February and were generally higher than those in autumn.…”

Section: Diatom Fluxes and Assemblagesmentioning

confidence: 97%

“…antarctica, Bacterosira bathyomphala, Rhizosolenia hebetata f. hebetata, Chaetoceros furcellatus, which develop in the plankton of the marginal ice zone, often at close to zero or negative surface water temperatures [19,96]. Indicators of the Atlantic waters advection into the western Arctic seas, such as relatively warm-water Coscinodiscus radiatus, C. perforatus and Shionodiscus oestrupii [25,60], were also found in great abundance (up to 82%, 1112.7 × 10 3 valves g −1 and 210 × 10 3 valves m −2 day −1 ) and among them, Coscinodiscus radiatus constantly dominated. Sublittoral meroplanktonic Paralia sulcata and Melosira moniliformis are rare (0-5.8%).…”

Section: Diatom Fluxes and Assemblagesmentioning

confidence: 99%

“…The main driver of interannual variability in SST is the variability of the Atlantic water temperature, which has increased significantly since 2005 [59]. Therefore, a special task was to find out whether the sinking material of the Eastern Barents Sea contains species of diatoms and dinoflagellate cysts, such as Coscinodiscus radiatus, C. perforatus, Shionodiscus oestrupii [25,60,61] and Operculodinium centrocarpum [62,63], which are indicators of the advection of transformed Atlantic waters into the Arctic seas.…”

Section: Introductionmentioning

confidence: 99%

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Diatom and Dinocyst Production, Composition and Flux from the Annual Cycle Sediment Trap Study in the Barents Sea

et al. 2022

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This paper presents the diatom and palynomorph data from a sediment trap deployed in the northern part of the East Barents Sea for an annual cycle from August 2017 to August 2018. The average monthly fluxes of diatoms and dinoflagellate cysts in the photic layer of the northeastern part of the Barents Sea varies from 10.4 × 103 to 640.8 × 103 valves m−2 day−1 and from 0.3 × 103 to 90.0 × 103 cysts m−2 day−1, respectively. Their fluxes are related to the low irradiance of the photic layer during the sea-ice cover period, dominance of southward currents, modern climate, and nepheloid layer conditions. Based on redundancy analysis of the relationship between the fluxes of diatoms and dinoflagellate cysts and organic carbon fluxes, sea-ice covers, and the seasonal cycle of light availability we determined the following. First, sea-ice-associated diatoms and dinocysts are exported to the sediment trap from the melting sea ice with a two-week delay. Second, the appearance of freshwater diatoms and green algae in the sinking material accumulating from March 2018 to July 2018 is also related to the melting of sea ice. And third, the presence of Coscinodiscus radiatus, C. perforatus, Shionodiscus oestrupii and Operculodinium centrocarpum in the diatoms and dinocysts species composition throughout the year indicates the advection of Atlantic waters into the Barents Sea up to 80° N.

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Section: Diatom Fluxes and Assemblagesmentioning

confidence: 97%

Section: Diatom Fluxes and Assemblagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diatom and Dinocyst Production, Composition and Flux from the Annual Cycle Sediment Trap Study in the Barents Sea

et al. 2022

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“…The environmental conditions remained severe with extensive sea ice cover, as evidenced by the presence of E. clavatum among dominant species of benthic foraminifers, the absence of ostracods, and the predominance of the heterotrophic dinocyst species I. minutum and Brigantedinium spp. Being closely related in their life cycle to cryophilic diatoms of the genus Chaetoceros [56], these species occur in the surface water layer between melting ice floes and polynyas. Grøsfjeld et al [11] link the abundance of I. minutum and Brigantedinium spp.…”

Section: Discussionmentioning

confidence: 99%

Boreal (Eemian) Transgression in the Northeastern White Sea Region: Multiproxy Evidence from Bychye-2 Section

Taldenkova,

Ovsepyan,

Rudenko

et al. 2024

Quaternary

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Reconstructing interglacial marine environments helps us understand the climate change mechanisms of the past. To contribute to this body of knowledge, we studied a high-resolution 455 cm-thick sediment sequence of the Boreal (Eemian) marine beds directly overlying Moscovian (Saalian) moraine in the Bychye-2 section on the Pyoza River. We analyzed lithological and microfossil (foraminifers, ostracods, pollen, aquatic palynomorphs) variations at the studied site. Stratigraphical zonation is based on the local and well-established regional pollen zones, correlated with the western European pollen zones. The studied marine beds accumulated from the end of the Moscovian glacial (>131 ka) until ca. 119.5 ka. We distinguished three successive phases: a seasonally sea-ice-covered, relatively deep, freshened basin in the initial rapid flooding stage (>131–130.5 ka); a deep basin in the maximum flooding phase with less extensive sea ice cover (130.5–130.25 ka); and a shallow basin with reduced sea ice cover (130.25–119.5 ka). According to a pollen zone comparison with other sites, the regional glacioisostatic rebound started ca. 130 ka. The diverse warm-water assemblages of benthic foraminifers and ostracods containing typical Baltic Sea species occurred during the regression, mainly 128–124 ka, thus giving evidence for a relatively long-lasting connection between the White and Baltic Seas.

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Diatoms and Aquatic Palynomorphs in the White Sea Sediments as Indicators of Sedimentation Processes and Paleoceanography

Polyakova

Novichkova

2018

The Handbook of Environmental Chemistry

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Diatoms and aquatic palynomorphs in surface sediments of the White Sea bays as indicators of sedimentation in marginal filters of rivers

Cited by 9 publications

References 11 publications

Diatom and Dinocyst Production, Composition and Flux from the Annual Cycle Sediment Trap Study in the Barents Sea

Diatom and Dinocyst Production, Composition and Flux from the Annual Cycle Sediment Trap Study in the Barents Sea

Boreal (Eemian) Transgression in the Northeastern White Sea Region: Multiproxy Evidence from Bychye-2 Section

Diatoms and Aquatic Palynomorphs in the White Sea Sediments as Indicators of Sedimentation Processes and Paleoceanography

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