The Holocene history of the southwestern Baltic Sea as reflected in a sediment core from the Bornholm Basin

Andrén, Elinor; Andrén, Thomas; Sohlenius, Gustav

doi:10.1080/030094800424259

Cited by 69 publications

(84 citation statements)

References 29 publications

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“…This could be explained by a stepwise drop in salinity during the Post-Littorina Sea stage. Similar conditions were also observed in Gdańsk Basin (Emelyanov, Vaikutienė 2013) and Bornholm Basin (Andrén et al 2000). The diatom assemblage was represented by marine species (P. sulcata, G. subtilissima, D. minor) and brackish-water species (Chaetoceros spores, O. guenter-grasii and H. lateripunctata).…”

Section: Post-littorina Sea Stagesupporting

confidence: 52%

Evolution of Arkona Basin environment in the Holocene in the light of diatom research

Janczak-Kostecka

2015

Landform Analysis

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This article presents the results of diatom studies from three cores taken from the Arkona Basin. The main stages of the Baltic Sea evolution in the Holocene -Ancylus Lake, Mastogloia Sea, Littorina Sea, and Post-Littorina Sea -were identified in diatom assemblages. The transition stage between Ancylus Lake and Littorina Sea, called Mastogloia Sea, was not such a long period as in the Mecklenburg Bay but was essential in the evolution of the Baltic Sea. The most pronounced feature of this period was an increase in the number of halophilous species, which reflected the existence of the littoral environment at the onset of this stage. The appearance and development of halophilous species was stimulated by stepwise inflows of saline waters. The composition of diatom assemblages reflected natural eutrophication of the Baltic Sea during the Littorina Sea stage.

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Section: Post-littorina Sea Stagesupporting

confidence: 52%

Evolution of Arkona Basin environment in the Holocene in the light of diatom research

Janczak-Kostecka

2015

Landform Analysis

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“…Significant changes in salinity throughout the Littorina transgression have also been revealed by diatom assemblages elsewhere in the Baltic Sea (Westman & Sohlenius 1999;Andrén et al 2000). The salinity conditions of the Baltic Sea are delicately balanced by riverine discharge and saltwater inflow from the North Sea (Schinke & Matthäus 1998).…”

Section: Discussionmentioning

confidence: 96%

Holocene palaeoecology and shoreline displacement on the Biskopsmåla Peninsula, southeastern Sweden

Andrén

Barnekow

et al. 2003

Boreas

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High‐resolution palaeoecological proxies of pollen, macrofossils and diatoms from an isolation lake provide a long‐term record of the Holocene landscape history and shoreline displacement on the Biskopsmåla Peninsula in central Blekinge, SE Sweden. During the Preboreal/Boreal transition, the peninsula was sparsely vegetated by woodlands, along with lateglacial dwarf shrub/steppe communities. The lake basin was isolated from the shallow Yoldia Sea during this time. The regional climate improved from 10 700 cal. BP, evident as progressive expansion of Pinus‐dominated mixed forest with deciduous trees. The lake basin was probably connected with the Ancylus Lake during the period 10700–10 100 cal. BP. Subsequently the basin became isolated again, corresponding to the Early Littorina Sea phase. Replacement of freshwater diatoms by those with brackish‐water affinity at 8100 cal. BP indicates the initial transgression of the Littorina Sea in this basin. But not until 7500 cal. BP were brackish conditions fully established. Peaks of brackish‐marine diatoms and dinoflagellates during 7500–7000 cal. BP indicate increased saltwater inflow to the Baltic Sea in response to global meltwater pulse 3. However, interactive changes in seagrass and stonewort macrofossil concentrations suggest that three minor transgressions during 5900–5300, 5000–4700 and 4400–4000 cal. BP occurred locally, associated with centennial‐scale variations in regional wind pattern or coastal storminess. By 3000 cal. BP, the lake basin was finally isolated from the Baltic, and thereafter the landscape on the peninsula became gradually more influenced by human activities.

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“…The sample of mud from core 233250 taken at the bottom of the unit was dated at around 3200 cal BP and, taking into account a possible age error from bulk sediment, it could be interpreted as the age of the onset of the Post-Littorina stage. A similar age of the transition period between the Littorina and PostLittorina stages was determined in the Bornholm Basin (2750 cal BP; Andrén et al 2000) and in the Gulf of Gdańsk (3000 uncorrected 14 C; Witkowski 1994). The most characteristic feature of this stage was a gradual decrease in the marine character of the environment with a slight decline of salinity recorded by diatom composition (Emelyanov and Vaikutienė 2013, Witak and Dunder 2007, Witkowski 1994.…”

Section: Post-littorina Sea Stagementioning

confidence: 93%

Stages of the Baltic Sea evolution in the geochemical record and radiocarbon dating of sediment cores from the Arkona Basin

Kostecki

2014

Oceanological and Hydrobiological Studies

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Four sediment cores from the southern part of the Arkona Basin were analyzed in terms of their geochemical composition, age and stratigraphy. The main stages of the Baltic Sea: the Baltic Ice Lake, the Ancylus Lake and the Littorina Sea were identified in all the analyzed cores. The data confirmed the high water fluctuation and significant environmental changes during the Baltic Sea evolution in the Late-Glacial and the Holocene. The signs of the second regression of the Baltic Ice Lake, dated at around 11 000 cal BP, were identified at a depth of 24 m b.s.l. Regression of the Ancylus Lake, dated at 9300 cal BP, was identified at a depth of 23 m b.s.l. The most pronounced period was the transition stage between the Ancylus Lake and the Littorina Sea. The record of the Littorina Sea onset in the sediments of the Arkona Basin is marked as a sudden increase in loss on ignition, biogenic silica, magnesium, calcium, iron and strontium. The age of the Littorina Sea in the Arkona Basin was estimated as younger than 8200 cal BP.

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The Holocene history of the southwestern Baltic Sea as reflected in a sediment core from the Bornholm Basin

Cited by 69 publications

References 29 publications

Evolution of Arkona Basin environment in the Holocene in the light of diatom research

Evolution of Arkona Basin environment in the Holocene in the light of diatom research

Holocene palaeoecology and shoreline displacement on the Biskopsmåla Peninsula, southeastern Sweden

Stages of the Baltic Sea evolution in the geochemical record and radiocarbon dating of sediment cores from the Arkona Basin

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