Irina Polovodova Asteman

Irina Polovodova Asteman
University of Gothenburg | GU · Department of Marine Sciences

PhD in Geology and Palaeontology

About

47
Publications
12,333
Reads
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569
Citations
Citations since 2016
23 Research Items
386 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
I am a senior lecturer at University of Gothenburg. I study environmental changes, such as bottom water oxygen deficiency, ocean acidification, changes in primary productivity, marine pollution, introduction of invasive species and climate variability observed during the late Holocene. I use benthic foraminifera and geochemical proxies from coastal sediments as natural archives of such changes and a benchmark for environmental baseline assessment.
Additional affiliations
August 2019 - present
University of Gothenburg
Position
  • Lecturer
January 2018 - August 2019
Marine MapTech (MMT)
Position
  • Geologist
January 2017 - December 2017
University of Gothenburg, Sweden/University of Vienna, Austria
Position
  • Lecturer

Publications

Publications (47)
Article
Full-text available
Specimens resembling the benthic foraminifera Nonionella stella (Cushman and Moyer, 1930), a morphospecies originally described from the San Pedro Basin, California, USA, were observed for the first time in the Oslofjord (Norway) in 2012. This study investigates the Oslofjord Nonionella population in order to confirm its non-indigenous species (NIS...
Article
Full-text available
The Koster Trench is the deepest part of the Kosterfjord (Skagerrak, North Sea), which stretches southward along the west coast of Sweden. Since 2009 Kosterfjord has been included in the Marine Protected Area Kosterhavet National Park. To effectively manage national parks, long-term time series of ecological data are needed and those can bederived...
Article
Full-text available
Transitional waters straddle the interface between marine and terrestrial biomes and, among others, include fjords, bays, lagoons, and estuaries. These coastal systems are essential for transport and manufacturing industries and suffer extensive anthropogenic exploitation of their ecosystem services for aquaculture and recreational activities. Thes...
Article
Full-text available
The pteropod Limacina lesueurii (d'Orbigny 1836) is a subtropical species, which in the Atlantic Ocean shows maximum abundance between 30°N and 25°S. In the North Sea, this species has so far only been occasionally reported from the coastal waters off the northern Scotland and in the English Channel. In this short note, we for the first time report...
Article
A small set of samples from Gullmar Fjord, on the west coast of Sweden, together with published data, has allowed the investigation of the ‘Anthropocene’ within the fjord. The dinoflagellate cyst record and its statistical analysis fails to show any marked changes within the assemblages either across the proposed boundary or indeed within the young...
Article
Full-text available
A comprehensive multi-proxy study on two sediment cores from the western and central Skagerrak was performed in order to detect the variability and causes of marine primary productivity changes in the investigated region over the last 1100 years. The cores were dated by Hg pollution records and AMS 14C dating and analysed for palaeoproductivity pro...
Article
Full-text available
We present 2500 years of reconstructed bottom water temperatures (BWT) using a fjord sediment archive from the north-east Atlantic region. The BWT represent winter conditions due to the fjord hydrography and the associated timing and frequency of bottom water renewals. The study is based on a ca. 8m long sediment core from Gullmar Fjord (Sweden), w...
Article
Full-text available
A comprehensive multi-proxy study on two sediment cores from western and central Skagerrak was performed in order to detect the variability and causes of marine primary productivity changes in the investigated region over the last 1100 years. The cores were dated by Hg pollution records and AMS 14C dating and analysed for palaeoproductivity proxies...
Article
Idefjord (Skagerrak, North Sea) has had a long pollution history due to a heavy exposure to effluents from sawmills and pulp and paper industry, which had a detrimental effect on fjord life. Earlier we presented a paper on the pollution history and benthic recovery in the fjord by studying sediment geochemistry (TOC and heavy metals) and benthic fo...
Article
Full-text available
The Baltic Sea (~393 000 km2) is the largest brackish sea in the world and its hydrographic and environmental conditions are strongly dependent on the frequency of saline water inflows from the North Sea. To improve our understanding of the natural variability of the Baltic Sea ecosystem detailed reconstructions of past saline water inflow changes...
Article
To detect climatic linkages between the Baltic Sea, the Skagerrak and the Nordic Seas, we present multi-proxy reconstructions covering the last 4500 years from 3 sediment cores taken in the Skagerrak and along the SW Norwegian margin. Foraminiferal assemblages at all three sites show a distinct change at ~1700 years BP, associated with a transition...
Article
Full-text available
To detect climatic linkages between the Baltic Sea, the Skagerrak and the Nordic Seas, we present multi-proxy reconstructions covering the last 4500 years from three sediment cores taken in the Skagerrak and along the SW Norwegian margin. Foraminiferal assemblages at all three sites show a distinct change at c. 1700 years BP, associated with a tran...
Article
Full-text available
The analyses of dinoflagellate cyst records, from the latest Quaternary sediments recovered from DSDP Core 610A taken on the Feni Ridge in the southern Rockall Trough, and part of core MD01-2461 on the continental margin of the Porcupine Seabight in the eastern North Atlantic Ocean, has provided evidence for significant oceanographic change encompa...
Research
The benthic foraminiferal community in a naturally CO2-rich coastal habitat of the southwestern Baltic Sea
Article
Full-text available
The eastern Pacific benthic foraminifer Nonionella stella Cushman & Moyer, 1930 was recorded for the first time in the Skagerrak (North Sea) and its fjords. In this short note we evaluate its migration, considering both dispersal by propagules and ship ballast tanks. We suggest that the predominantly southward surface currents along the western Eur...
Article
Full-text available
Gullmar Fjord, a sill fjord on the Skagerrak coast of western Sweden, contains a valuable sedimentary archive for the last 2500 years. This archive encompasses a temporal record from the Roman Warm Period, the Dark Ages, the Medieval Warm Period, the Little Ice Age and into the modern warm period. A high resolution dinoflagellate cyst analysis has...
Article
Full-text available
Historical benthic foraminiferal assemblages were analysed in two sediment cores recovered from the deepest basin of Gullmar Fjord by a Gemini and a gravity corer. A compilation of faunal data corresponding to the period 1935–2011 is presented together with the bottom water temperature, salinity and dissolved oxygen records for the same period. Thi...
Article
Full-text available
We discuss the climatic and environmental changes during the last millennium in NE Europe based on a ca. 8-m long high-resolved and well-dated marine sediment record from the deepest basin of Gullmar Fjord (SW Swe- den). According to the 210Pb- and 14C-datings, the record includes the period of the late Holocene characterised by anomalously cold su...
Article
Full-text available
It is expected that the calcification of foraminifera will be negatively affected by the ongoing acidification of the oceans. Compared to the open oceans, these organisms are subjected to much more adverse carbonate system conditions in coastal and estuarine environments such as the southwestern Baltic Sea, where benthic foraminifera are abundant....
Article
Full-text available
We discuss the climatic and environmental changes during the last millennium in NE Europe based on a ca. 8-m long high-resolved and well-dated marine sediment record from the deepest basin of Gullmar Fjord (SW Sweden). According to the 210Pb- and 14C-datings, the record includes the period of the late Holocene characterised by anomalously cold summ...
Article
Full-text available
It is expected that the calcification of foraminifera will be negatively affected by the ongoing acidification of the oceans. Compared to the open oceans, these organisms are subjected to much more adverse carbonate system conditions in coastal and estuarine environments such as the southwestern Baltic Sea, where benthic foraminifera are abundant....
Book
The Baltic Sea ecosystem undergoes a high environmental variability due to the occasional ventilation of deep water by highly saline Kattegat water, which enters the Baltic through the narrow and shallow Danish Straits. During the past two decades, the frequency of major inflows decreased and led to extended periods of stagnation with reduced deep-...
Data
It is expected that the calcification of foraminifera will be negatively affected by the ongoing acidification of the oceans. Compared to the open oceans, these organisms are subjected to much more adverse carbonate system conditions in coastal and estuarine environments such as the southwestern Baltic Sea, where benthic foraminifera are abundant....
Article
Full-text available
A high-resolution study of benthic foraminiferal assemblages was performed on a ca. eight metre long sediment core from Gullmar Fjord on the west coast of Sweden. The results of 210Pb- and AMS 14C-datings show that the record includes the two warmest climatic episodes of the last 1500years: the Medieval Warm Period (MWP) and the recent warming of t...
Article
Full-text available
Culturing experiments were performed with the benthic foraminifer Ammonia aomo - riensis from Flensburg Fjord, western Baltic Sea. The experiments simulated a projected rise in atmospheric CO2 concentrations. We exposed specimens to 5 seawater pCO2 levels ranging from 618 μatm (pH 7.9) to 3130 μatm (pH 7.2) for 6 wk. Growth rates and mortality diff...
Article
Full-text available
Ammonia and Elphidium collected in the Kiel Fjord for the present study were first identified on morphological bases as Ammonia beccarii (Linné, 1758) and Elphidium excavatum (Terquem, 1876). Phylogenetic analyses based on partial SSU rDNA and LSU rDNA sequences show that Ammonia specimens sampled in the Kiel Fjord belong to the phylotype T6, which...
Data
Culturing experiments were performed with the benthic foraminifer Ammonia aomoriensis from Flensburg Fjord, western Baltic Sea. The experiments simulated a projected rise in atmospheric CO2 concentrations. We exposed specimens to 5 seawater pCO2 levels ranging from 618 µatm (pH 7.9) to 3130 µatm (pH 7.2) for 6 wk. Growth rates and mortality differe...
Data
A high-resolution study of benthic foraminiferal assemblages was performed on a ca. eight metre long sediment core from Gullmar Fjord on the west coast of Sweden. The results of 210Pb- and AMS 14C-datings show that the record includes the two warmest climatic episodes of the last 1500 years: the Medieval Warm Period (MWP) and the recent warming of...
Article
Full-text available
Living benthic foraminifera of Flensburg Fjord were surveyed in June 2006. The muddy and organic-rich sediments of the inner fjord were dominated by Elphidium incertum. E incertum and E excavatum were frequent in muds and sandy Muds of the fjord loop around Holnis Peninsula and in the outer part. Gelting Bay yielded a different biofacies, indicatin...
Article
Full-text available
Abnormal tests were commonly found in recent benthic foraminiferal assemblages in two fjords of the Kiel Bay, the western Baltic Sea. We assessed 18 different types of abnormalities, which were classified into five groups: chamber, apertural, umbilical, coiling and test abnormalities. In both fjords, test abnormalities are over-represented in Ammon...
Article
Full-text available
The living benthic foraminiferal assemblages in Kiel Fjord (SW Baltic Sea) were investigated in the years 2005 and 2006. The faunal studies were accomplished by geochemical analyses of surface sediments. In general, sediment pollution by copper, zinc, tin and lead is assessed as moderate in comparison with levels reported from other areas of the Ba...
Article
Full-text available
The living benthic foraminiferal assemblages in the Kiel Fjord (SW Baltic Sea) were investigated in the years 2005 and 2006. The faunal studies were accomplished by geochemical analyses of surface sediments. In general, sediment pollution by copper, zinc, tin and lead was assessed as moderate in comparison with levels reported from other areas of t...

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Projects

Projects (3)
Archived project
1)To assess the heavy metal pollution levels in two shallow inlets of Kiel Bay (SW Baltic). 2)To identify response of benthic foraminifera to pollution and natural environmental changes in order to constrain foraminiferal value as palaeoproxies.
Archived project
Investigating the dinoflagellate cyst record through the Anthropocene as recorded in Gullmar Fjord on the west coast of Sweden. Has the putative Anthropocene made any impact on the dinoflagellate populations or are any changes merely local.
Archived project
ClimLink "Climate forcing factors for marine environmental change during the mid and late Holocene - a link between the eastern Atlantic and the Baltic Sea" aims to reconstruct mid to late Holocene climate induced ecosystem changes in the eastern Nordic Seas, Skagerrak, Kattegat and Baltic Sea. Linkages and common forcing factors that drive climate changes and their effects will be identified. The following hypotheses will be addressed: 1) The state of the Nordic Seas inflow determines the inflow of saline water in the Baltic Sea, 2) minor changes in the Atlantic can cause major changes in the Baltic sector, and 3) the oceanic conditions of the eastern Nordic Seas and Baltic Sea are driven by common forcing factors. These hypotheses will be addressed based on highresolution micropaleontological and geochemical reconstructions to be performed on a transect of sediment cores strategically located in the Norwegian Trench, Skagerrak, Kattegat, Arkona Basin, Bornholm Basin and Gdansk Bay. Furthermore, there will be a strong emphasis on optimal chronological control to secure a sound basis for placing these reconstructions in a stratigraphic context, and hence, establish an integrated mid to late Holocene climate change history of the North Atlantic and Baltic Sea. The integrated reconstruction of regional climate change will be used in combination with regional downscaled model simulations to identify internal and external forcing factors, climatic and environmental effects.