Reprint of: Benthic and planktic community changes at the North Siberian margin in response to Atlantic water mass variability since last deglacial times

Taldenkova, E.; Bauch, Henning A.; Stepanova, A.; Ovsepyan, Y.; Pogodina, I. A.; Klyuvitkina, T. S.; Nikolaev, S. D.

doi:10.1016/j.marmicro.2013.03.010

Cited by 8 publications

(10 citation statements)

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“…Several studies of Arctic Ocean margins have recovered deglacial sediments. Taldenkova et al (2013) found the earliest deglacial dates of 15.34 and 15.37 ka in core PS51/154-11 at 270 MWD in the Laptev Sea. These correspond to the first appearance of common benthic foraminifera.…”

Section: Lgm and Deglacial Sedimentation In The Arctic Oceanmentioning

confidence: 87%

“…Comparison of benthic foraminifers in cores SWERUS-L2-4-PC1 and PS51/154 from the Laptev Sea (Taldenkova et al, 2013) using the assemblage scheme of river-proximal, river-intermediate, and river-distal taxa defined by Polyak et al (2002). The shading marks key climatic intervals identified by Taldenkova et al (2013) and informal foraminiferal zones in core 4-PC. River-proximal species dominate from 530 to 600 cm of core depth in 4-PC1 on the East Siberian Sea margin.…”

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

“…Figure 7 compares the benthic foraminiferal data from core 4-PC1 with the foraminiferal data from core PS51/154 (270 MWD) from the Laptev Sea (Taldenkova et al, 2013). We used the assemblage scheme of river-proximal, riverintermediate, and river-distal taxa defined by Polyak et al (2002).…”

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

“…We used the assemblage scheme of river-proximal, riverintermediate, and river-distal taxa defined by Polyak et al (2002). Gray shading marks the key climatic intervals identified by Taldenkova et al (2013) and suggested by the informal foraminiferal zones in core 4-PC1. River-proximal species, which dominate from 530 to 600 cm of core depth in core 4-PC1 on the Chukchi Sea margin, are, in contrast, generally rare (usually < 10%) in core PS51/154.…”

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

“…In addition, although studies of deglacial sediments using micropaleontological proxies are common throughout the Arctic and subarctic regions, most studied cores are from water depths deeper than 200 m (Ishman et al, 1996;Scott et al, 2009;Taldenkova et al, 2013;Carbonara et al, 2016;Hald, 1999;Osterman et al, 2002;Jennings et al, 2014;Wollenburg et al, 2007;Knudsen et al, 2004). The proxies provide excellent paleoceanographic records of water mass history but not direct evidence for the elevation and location of paleoshorelines.…”

Section: Introductionmentioning

confidence: 99%

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Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

et al. 2017

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Abstract. ka) sea level history on the East Siberian continental shelf and upper continental slope was reconstructed using new geophysical records and sediment cores taken during Leg 2 of the 2014 SWERUS-C3 expedition. The focus of this study is two cores from Herald Canyon, piston core SWERUS-L2-4-PC1 (4-PC1) and multicore SWERUS-L2-4-MC1 (4-MC1), and a gravity core from an East Siberian Sea transect, SWERUS-L2-20-GC1 (20-GC1). Cores 4-PC1 and 20-GC were taken at 120 and 115 m of modern water depth, respectively, only a few meters above the global last glacial maximum (LGM; ∼ 24 kiloannum or ka) minimum sea level of ∼ 125-130 meters below sea level (m b.s.l.). Using calibrated radiocarbon ages mainly on molluscs for chronology and the ecology of benthic foraminifera and ostracode species to estimate paleodepths, the data reveal a dominance of river-proximal species during the early part of the Younger Dryas event (YD, Greenland Stadial GS-1) followed by a rise in river-intermediate species in the late Younger Dryas or the early Holocene (Preboreal) period. A rapid relative sea level rise beginning at roughly 11.4 to 10.8 ka (∼ 400 cm of core depth) is indicated by a sharp faunal change and unconformity or condensed zone of sedimentation. Regional sea level at this time was about 108 m b.s.l. at the 4-PC1 site and 102 m b.s.l. at 20-GC1. Regional sea level near the end of the YD was up to 42-47 m lower than predicted by geophysical models corrected for glacio-isostatic adjustment. This discrepancy could be explained by delayed isostatic adjustment caused by a greater volume and/or geographical extent of glacial-age land ice and/or ice shelves in the western Arctic Ocean and adjacent Siberian land areas.

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Section: Lgm and Deglacial Sedimentation In The Arctic Oceanmentioning

confidence: 87%

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

Section: Comparison With Other Arctic Deglacial Microfaunal Recordsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

et al. 2017

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An Arctic and Subarctic ostracode database: biogeographic and paleoceanographic applications

et al. 2015

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A new Arctic Ostracode Database-2015 (AOD-2015 provides census data for 96 species of benthic marine Ostracoda from 1340 modern surface sediments from the Arctic Ocean and subarctic seas. Ostracoda is a meiofaunal, Crustacea group that secretes a bivalved calcareous (CaCO 3 ) shell commonly preserved in sediments. Arctic and subarctic ostracode species have ecological limits controlled by temperature, salinity, oxygen, sea ice, food, and other habitat-related factors. Unique species ecology, shell chemistry (Mg/Ca ratios, stable isotopes), and limited stratigraphic ranges make them a useful tool for paleoceanographic reconstructions and biostratigraphy. The database, described here, will facilitate the investigation of modern ostracode biogeography, regional community structure, and ecology. These data, when compared to downcore faunal data from sediment cores, will provide a better understanding of how the Arctic has been affected by climatic and oceanographic change during the Quaternary. Images of all species and biogeographic distribution maps for selected species are presented, with brief discussion of representative species' biogeographic and ecological significance. Publication of AOD-2015 is opensourced and will be available online at several public Guest editors: Alison J. Smith, Emi Ito, B. Brandon Curry & Patrick De Deckker / Multidisciplinary aspects of aquatic science: the legacy of Rick Forester Electronic supplementary material The online version of this article (websites with latitude, longitude, water depth, and bottom water temperature for most samples. It includes material from Arctic abyssal plains and submarine ridges, continental slopes, and shelves of the Kara, Laptev, East Siberian, Chukchi, Beaufort Seas, and several subarctic regions.

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Biological response to climate change in the Arctic Ocean: the view from the past

Cronin

2015

Arktos

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The Arctic Ocean is undergoing rapid climatic changes including higher ocean temperatures, reduced sea ice, glacier and Greenland Ice Sheet melting, greater marine productivity, and altered carbon cycling. Until recently, the relationship between climate and Arctic biological systems was poorly known, but this has changed substantially as advances in paleoclimatology, micropaleontology, vertebrate paleontology, and molecular genetics show that Arctic ecosystem history reflects global and regional climatic changes over all timescales and climate states (10 3 -10 7 years). Arctic climatic extremes include 25°C hyperthermal periods during the Paleocene-Eocene (56-46 million years ago, Ma), Quaternary glacial periods when thick ice shelves and sea ice cover rendered the Arctic Ocean nearly uninhabitable, seasonally sea-ice-free interglacials and abrupt climate reversals. Climate-driven biological impacts included large changes in species diversity, primary productivity, species' geographic range shifts into and out of the Arctic, community restructuring, and possible hybridization, but evidence is not sufficient to determine whether or when major episodes of extinction occurred.

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Reprint of: Benthic and planktic community changes at the North Siberian margin in response to Atlantic water mass variability since last deglacial times

Cited by 8 publications

References 96 publications

Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

An Arctic and Subarctic ostracode database: biogeographic and paleoceanographic applications

Biological response to climate change in the Arctic Ocean: the view from the past

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