Holocene evolution of the Pomeranian Bay environment, southern Baltic Sea**The Polish Ministry of Science and Higher Education financed this study within the framework of project No. N N305 084235.

Kostecki, Robert; Janczak-Kostecka, Beata

doi:10.5697/oc.53-1-ti.471

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…The sediments of the Littorina Sea were represented by diatom subzones DAZ B2 and DAZ C1 from cores 258000-1 and 233220, where stabilization of the marine conditions was recorded. Significantly increasing salinity was confirmed by changes in diatom composition and was also noted in other cores from the Arkona Basin and Pomeranian Bay (Kostecki, Janczak-Kostecka 2011.…”

Section: Littorina Sea Stagesupporting

confidence: 67%

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: Littorina Sea Stagesupporting

confidence: 67%

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

Janczak-Kostecka

2015

Landform Analysis

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“…Additionally, the Baltic Sea has been identified as one of the fastest warming marine basins on the planet (Belkin, 2009). Mytilid mussels have successfully colonised the Baltic Sea presumably 9000-8000 years ago after the last freshwater stage (Berglund et al, 2005;Witkowski et al, 2005;Behre, 2007;Kostecki and Janczak-Kostecka, 2011). Today, the two species Mytilus edulis and M. trossulus occur in the Baltic Sea (e.g., Koehn, 1991).…”

Section: Introductionmentioning

confidence: 99%

Salinity Driven Selection and Local Adaptation in Baltic Sea Mytilid Mussels

et al. 2021

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Baltic blue mussels can colonise and dominate habitats with far lower salinity (<10 psu) than other Mytilus congeners. Pervasive gene flow was observed between Western Baltic Mytilus edulis living at high salinity conditions and Eastern Baltic M. trossulus living at lower salinites, with highest admixture proportions within a genetic transition zone located at intermediate salinities (Darss Sill area). Yet, we do not understand the impacts of low salinity on larval performance, and how salinity may act as an early selective pressure during passive larval drift across salinity gradients. This study tested whether larvae originating from two different populations along the natural salinity cline in the Baltic Sea have highest fitness at their native salinities. Our results suggest that Eastern Baltic M. trossulus (Usedom, 7 psu) and Western Baltic M. edulis (Kiel, 16 psu) larvae display better performance (fitness components: growth, mortality, settlement success) when reared at their respective native salinities. This suggests that these populations are adapted to their local environment. Additionally, species diagnostic markers were used for genetic analyses of transition zone (Ahrenshoop, 11 psu) mussel larvae exposed to low salinity. This revealed that low salinity selection resulted in a shift towards allele frequencies more typical for Eastern Baltic M. trossulus. Thus, salinity acts as a selective pressure during the pre-settlement phase and can shape the genetic composition of Baltic mussel populations driving local adaptation to low salinity. Future climate change driven desalination, therefore, has the potential to shift the Baltic Sea hybrid gradient westward with consequences for benthic ecosystem structure.

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“…This species has been interpreted to indicate a salinity rise associated with the initial and late Littorina transgressive phases (Miller 1973(Miller , 1982Strandberg et al 2020). In addition, the diatom flora of the Littorina Sea stage includes, among others, the tychoplanktonic species Hyalodiscus scoticus, as well as other littoral forms such as Rhabdonema minutum, Diploneis smithii, Cocconeis scutellum and Amphora commutata, which are all indicative of increasing salinity (Risberg 2002;Emelyanov et al 2011;Kostecki & Janczak-Kostecka 2011).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

“…In addition, the diatom flora of the Littorina Sea stage includes, among others, the tychoplanktonic species Hyalodiscus scoticus , as well as other littoral forms such as Rhabdonema minutum , Diploneis smithii , Cocconeis scutellum and Amphora commutata , which are all indicative of increasing salinity (Risberg 2002; Emelyanov et al . 2011; Kostecki & Janczak‐Kostecka 2011).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Holocene relative sea level changes in the Västervik‐Gamlebyviken region on the southeast coast of Sweden, southern Baltic Sea

Katrantsiotis

Dahl

Palm

et al. 2022

Boreas

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We reconstruct the Holocene shore displacement of the V€ astervik-Gamlebyviken area on the southeast coast of Sweden, characterised by a maritime cultural landscape and archaeological significance since the Mesolithic. Sediment cores were retrieved from four lake basins that have been raised above sea level due to the postglacial land uplift and eustatic sea level changes after the melting of the Fennoscandian Ice Sheet. The cores were radiocarbon dated and analysed for loss on ignition and diatoms. The isolation thresholds of the basins were determined using LiDAR data. The results provide evidence for the initiation of the first Littorina Sea transgression in this area at 8.5 thousand calibrated years before present (cal. ka BP). A relative sea level rise by 7 m a.s.l. is recorded between 8.0 and 7.5 cal. ka BP with a highstand at 22 m a.s.l. between 7.5 and 6.2 cal. ka BP. These phases coincide with the second and third Littorina Sea transgressions, respectively, in the Blekinge area, southern Sweden and are consistent with the final deglaciation of North America. After 6.2 cal. ka BP, the relative sea level dropped below 22 m a.s.l., and remained at 20 m a.s.l. until 4.6 cal. ka BP coinciding with the fourth Littorina Sea transgression in Blekinge. From 4.6 to 4.2 cal. ka BP, the shore displacement shows a regression rate of 10 mm a 1 followed by a slowdown with a mean value of 4.6 mm a 1 until 1.6 cal. ka BP, when the relative sea level dropped below 3.3 m a.s.l. The Middle to Late Holocene highstand and other periods of minor sea level transgressions and/or higher salinity between 6.2 and 1.7 cal. ka BP are attributed to a combination of warmer climate and higher inflow of saline waters in the southern Baltic Sea due to stronger westerlies, caused by variations in the North Atlantic atmospheric patterns.

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Holocene evolution of the Pomeranian Bay environment, southern Baltic Sea**The Polish Ministry of Science and Higher Education financed this study within the framework of project No. N N305 084235.

Cited by 10 publications

References 12 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

Salinity Driven Selection and Local Adaptation in Baltic Sea Mytilid Mussels

Holocene relative sea level changes in the Västervik‐Gamlebyviken region on the southeast coast of Sweden, southern Baltic Sea

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