Comparison study of the modern ostracod associations in the Kara and Laptev seas: Ecological aspects

Stepanova, A.; Taldenkova, E.; Simstich, Johannes; Bauch, Henning A.

doi:10.1016/j.marmicro.2006.10.003

Cited by 49 publications

(69 citation statements)

References 17 publications

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“…Data not enclosed in the supplement will be uploaded to the PANGEA database (LINK). All ostracod data are accessible via PANGEA (https://doi.org/10.1594/PANGAEA.873270, Stepanova, 2017).…”

Section: Discussionmentioning

confidence: 99%

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Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

et al. 2017

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Abstract. Sediment records recovered from the Baltic Sea during Integrated Ocean Drilling Program Expedition 347 provide a unique opportunity to study paleoenvironmental and climate change in central and northern Europe. Such studies contribute to a better understanding of how environmental parameters change in continental shelf seas and enclosed basins. Here we present a multi-proxy-based reconstruction of paleotemperature (both marine and terrestrial), paleosalinity, and paleoecosystem changes from the Little Belt (Site M0059) over the past ∼ 8000 years and evaluate the applicability of inorganic-and organic-based proxies in this particular setting.All salinity proxies (diatoms, aquatic palynomorphs, ostracods, diol index) show that lacustrine conditions occurred in the Little Belt until ∼ 7400 cal yr BP. A connection to the Kattegat at this time can thus be excluded, but a direct connection to the Baltic Proper may have existed. The transition to the brackish-marine conditions of the Littorina Sea stage (more saline and warmer) occurred within ∼ 200 years when the connection to the Kattegat became established after ∼ 7400 cal yr BP. The different salinity proxies used here generally show similar trends in relative changes in salinity, but often do not allow quantitative estimates of salinity.Published by Copernicus Publications on behalf of the European Geosciences Union. U. Kotthoff et al.: Little Belt multi-proxy comparisonThe reconstruction of water temperatures is associated with particularly large uncertainties and variations in absolute values by up to 8 • C for bottom waters and up to 16 • C for surface waters. Concerning the reconstruction of temperature using foraminiferal Mg / Ca ratios, contamination by authigenic coatings in the deeper intervals may have led to an overestimation of temperatures. Differences in results based on the lipid paleothermometers (long chain diol index and TEX L 86 ) can partly be explained by the application of modern-day proxy calibrations to intervals that experienced significant changes in depositional settings: in the case of our study, the change from freshwater to marine conditions. Our study shows that particular caution has to be taken when applying and interpreting proxies in coastal environments and marginal seas, where water mass conditions can experience more rapid and larger changes than in open ocean settings. Approaches using a multitude of independent proxies may thus allow a more robust paleoenvironmental assessment.

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“…Data not enclosed in the supplement will be uploaded to the PANGEA database (LINK). All ostracod data are accessible via PANGEA (https://doi.org/10.1594/PANGAEA.873270, Stepanova, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…are the dominant taxa in this interval. These are typical representatives of Arctic and/or Boreal shallow water shelf faunas (Stepanova et al, 2007). An open sea environment and a salinity of 14-16 or higher is expected for this group of species (Frenzel et al, 2010).…”

Section: Ostracodsmentioning

confidence: 99%

Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

et al. 2017

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“…gov/paleo-search/). The primary sources of taxonomy and ecology were papers by Cronin et al (1994Cronin et al ( , 1995Cronin et al ( , 2010, Gemery et al (2015), Joy and Clark (1977), Stepanova (2006), Stepanova et al (2003Stepanova et al ( , 2007Stepanova et al ( , 2010, Whatley et al (1996Whatley et al ( , 1998, and Yasuhara et al (2014).…”

Section: Ostracode Taxonomy and Ecologymentioning

confidence: 99%

Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

et al. 2017

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Abstract. Late Quaternary paleoceanographic changes at the Lomonosov Ridge, central Arctic Ocean, were reconstructed from a multicore and gravity core recovered during the 2014 SWERUS-C3 Expedition. Ostracode assemblages dated by accelerator mass spectrometry (AMS) indicate changing sea-ice conditions and warm Atlantic Water (AW) inflow to the Arctic Ocean from ∼ 50 ka to present. Key taxa used as environmental indicators include Acetabulastoma arcticum (perennial sea ice), Polycope spp. (variable seaice margins, high surface productivity), Krithe hunti (Arctic Ocean deep water), and Rabilimis mirabilis (water mass change/AW inflow). Results indicate periodic seasonally seaice-free conditions during Marine Isotope Stage (MIS) 3 (∼ 57-29 ka), rapid deglacial changes in water mass conditions (15-11 ka), seasonally sea-ice-free conditions during the early Holocene (∼ 10-7 ka) and perennial sea ice during the late Holocene. Comparisons with faunal records from other cores from the Mendeleev and Lomonosov ridges suggest generally similar patterns, although sea-ice cover during the Last Glacial Maximum may have been less extensive at the new Lomonosov Ridge core site (∼ 85.15 • N, 152 • E) than farther north and towards Greenland. The new data provide evidence for abrupt, large-scale shifts in ostracode species depth and geographical distributions during rapid climatic transitions.

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“…The first publications on their taxonomy came out by the end of the 19th century and represented short descrip tions and illustrations of ostracods mostly from the western European Arctic. Within the last 40 years many detailed taxonomic papers with descriptions and scanning micrographs of recent ostracods were pub lished (Neale and Howe, 1975;Whatley and Masson, 1979;Whatley and Coles, 1987;Athersuch et al, 1989;Brouwers, 1990Brouwers, , 1993Brouwers, , 1994Whatley et al, 1996Whatley et al, , 1998Stepanova et al, 2003Stepanova et al, , 2004Stepanova et al, , 2007Stepanova, 2006) as well as the databases on the distri bution of recent Arctic ostracods (Cronin et al, 1991;Shornikov, 2001Shornikov, , 2004. These works contain precise information on the depth, salinity, and temperature of the environments inhabited by different ostracod spe cies and thus can be used for paleoenvironmental reconstructions.…”

Section: Introductionmentioning

confidence: 99%

“…Lev (1972Lev ( , 1983 analyzed in detail ostracod assemblages from the Neogene-Quaternary deposits of the Malaya Zemlya tundra, Western Siberian Lowland, Arctic islands, Taimyr Peninsula, and northern part of the Gulf of Anadyr and described ostracod assemblages that can be used for stratigraphic correlation of depos its from different regions. She subdivided ostracods in three groups according to the salinity tolerance range (euhaline (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40), brachyhaline (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), pliohaline (10)(11)(12)(13)(14)(15)(16)(17)(18)) and in four groups according to their tem perature preference (arctic, subarctic, moderately cold water, moderately warm water). T. Cronin (1977Cronin ( , 1981Cronin ( , 1989) studied and interpreted ostracod assemblages from the Champlain Sea (Gulf of St. Lawrence).…”

Section: Introductionmentioning

confidence: 99%

Arctic quaternary ostracods and their use in paleoreconstructions

2010

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Abstract-The paper deals with original and published data on fossil ostracodal assemblages from the Eur asian Arctic Kara, Laptev and Chuckchi seas. As a whole, six ecologically different assemblages were distin guished (freshwater, brackish water, marine of the inner, middle and outer shelves and upper continental slope), they replace each other upcore reflecting a gradual increase in water depth and distance from the coast. These assemblages are stable in the entire Arctic region and can be used for interpretation of environ ments in different Arctic areas.

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Comparison study of the modern ostracod associations in the Kara and Laptev seas: Ecological aspects

Cited by 49 publications

References 17 publications

Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

Arctic quaternary ostracods and their use in paleoreconstructions

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Comparison study of the modern ostracod associations in the Kara and Laptev seas: Ecological aspects

Cited by 49 publications

References 17 publications

Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

Arctic quaternary ostracods and their use in paleoreconstructions

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Product

Resources

About

Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition