An almost completed pollution-recovery cycle reflected by sediment geochemistry and benthic foraminiferal assemblages in a Swedish–Norwegian Skagerrak fjord

Asteman, Irina Polovodova; Hanslik, Daniela; Nordberg, Kjell

doi:10.1016/j.marpolbul.2015.04.031

Cited by 35 publications

(24 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cassidulina laevigata and Cylindrogullmia alba show the same distribution pattern along the TOC gradient as for species from the indifferent EG2. Cassidulina laevigata is a typical species of the Skagerrak-Kattegat fauna (sensu Nordberg et al 2000), which used to flourish in several Scandinavian fjords until it was replaced by species associated with frequent coastal hypoxia (e.g., Alve 1991, Polovodova Asteman & Nordberg 2013, Polovodova Asteman et al 2015. In the present study, C. laevigata is never abundant, it only occurs at stations with normoxic conditions and mainly, but not solely, where TOC is low to moderate (Fig.…”

Section: Foraminiferal Indicator Speciessupporting

confidence: 44%

See 1 more Smart Citation

Can benthic foraminifera serve as proxies for changes in benthic macrofaunal community structure? Implications for the definition of reference conditions

Bouchet

Telford

Rygg

et al. 2018

Marine Environmental Research

View full text Add to dashboard Cite

Benthic macrofauna is one of the most widely used biological groups to assess the ecological status of marine systems. Lately, attention has been paid to similar use of benthic foraminifera. In this study, distribution patterns of benthic foraminiferal and macrofaunal species were investigated simultaneously in 11 fjords in southeastern Norway in order to assess correlations and responses to environmental conditions. Selected fjords allowed to investigate contrasted environmental conditions from low total organic carbon (TOC) content (sediment TOC < 2.7%) in normoxia (bottom-water [O] > 2 mL O.L) up to high TOC content (> 3.4%) in severe hypoxia (< 0.5 mL O.L). Environmental parameters comprised bottom-water dissolved oxygen, grain size, total organic carbon, total nitrogen (TN), pigments and depth below threshold (DBT). Foraminiferal and macrofaunal community data were significantly correlated (Procrustes analysis m = 0.66, p = 0.001). Hence, benthic foraminiferal distribution patterns mirror those of benthic macrofauna. However, as opposed to the foraminifera, macrofauna was not recorded at the most oxygen-depleted stations and, hence, was more sensitive to severe oxygen depletion. With regard to assigning species to ecological groups for ecological quality status assessment, the results suggest that species, e.g. Spiroplectammina biformis (foraminifera), Scalibregma inflatum (macrofauna), may exhibit different ecological requirements depending on their habitat. Considering the observed congruent patterns of benthic foraminifera and macrofauna, palaeo-communities of benthic foraminifera could be used as indicators of reference conditions for benthic macrofaunal community structure. This would however need further developments of algorithms to perform such a translation.

show abstract

Section: Foraminiferal Indicator Speciessupporting

confidence: 44%

“…Tolerance to TOC enrichment under appropriate oxygen concentrations has already been observed for T. earlandi (Schafer et al 1995). It is however sensitive to oxygen depletion , Polovodova Asteman et al 2015. Its abundance decreased at dissolved-oxygen concentrations below 1.0 ml O 2 .L -1 .…”

Section: Bulimina Marginata Recurvoides Trochamminiforme Liebusellamentioning

confidence: 72%

Can benthic foraminifera serve as proxies for changes in benthic macrofaunal community structure? Implications for the definition of reference conditions

Bouchet

Telford

Rygg

et al. 2018

Marine Environmental Research

View full text Add to dashboard Cite

show abstract

“…The multidisciplinary study of sediment cores has been extensively used to reconstruct the recent environmental transformation of coastal areas (Baptista Neto, 2017;Polovodova Asteman et al, 2015;Ruiz-Fernández et al, 2012Sreenivasulu et al, 2017). As sediments preserve a valuable fingerprint of natural events and human impacts, their records provide information useful for reconstructing contamination histories and trends, and for facilitating long-term risk assessment and sustainable management of estuaries (Birch et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Geological record of extreme floods and anthropogenic impacts on an industrialised bay: The inner Abra of Bilbao (northern Spain)

Irabién

Cearreta

Gómez-Arozamena

et al. 2019

Science of The Total Environment

View full text Add to dashboard Cite

“…; Polovodova Asteman et al . ), settings with bottom water conditions causing increased post‐mortem dissolution of calcareous forms (see Alve & Murray , ; Alve ) or in high‐latitude areas influenced by Polar water (e.g. Schafer & Cole ; Jennings & Helgadottir ; Perner et al .…”

Section: Discussionmentioning

confidence: 99%

“…Benthic foraminiferal faunas dominated by agglutinated taxa often occur in settings characterized by strong water-column stratification and/or oxygen deficiency (e.g. Alve & Nagy 1986;Hermelin 1987;Alve 1996;Murray et al 2003;Polovodova Asteman et al 2015), settings with bottom water conditions causing increased post-mortem dissolution of calcareous forms (see Alve & Murray 1995, 1997Alve 1996) or in high-latitude areas influenced by Polar water (e.g. Schafer & Cole 1988;Jennings & Helgadottir 1994;Perner et al 2011).…”

Section: -2300 Years Bp: a Low Productivity Periodmentioning

confidence: 99%

Late Holocene palaeoproductivity changes: a multi‐proxy study in the Norwegian Trench and the Skagerrak, North Sea

Asteman

Risebrobakken

Moros

et al. 2017

Boreas

Self Cite

View full text Add to dashboard Cite

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 transition from absence and rare occurrence of Brizalina skagerrakensis during c. 4500–2300 years BP to its subsequent abundance increase, suggesting a stronger influence of nutrient‐rich water‐masses during the last c. 1700 years. Increased nutrient availability, which probably stimulated higher primary productivity, is further supported by an increase in diatoms, total organic carbon and benthic foraminiferal species indicative of high productivity and carbon fluxes during the last c. 1700 years as compared to c. 4500–2300 years BP. The amplitude of the B. skagerrakensis signal is largest in the central Skagerrak and gradually becomes smaller towards the Norwegian Sea suggesting that the dominant source of the nutrient‐rich water was the brackish outflow from the Baltic Sea. The generally lower abundances of planktonic foraminifera since c. 1700 years BP support the hypothesis of less saline surface water conditions in the Skagerrak. These results agree with other studies, which suggest a stronger Baltic outflow over the last 1700 years coinciding with a general cooling, increased wintertime westerlies bringing more winter precipitation to northern Europe, increased river runoff and higher frequency of floods. The increase in outflow also occurs during deposition of laminated sediments in the deep Baltic Sea. Leakage of dissolved inorganic phosphorus from anoxic sediments, as well as enhanced erosion due to deforestation in combination with higher runoff from Norway, coastal upwelling and more vigorous frontal dynamics may all have contributed to higher nutrient availability within the adjacent Skagerrak during the last 1700 years BP as compared to c. 4500–2300 years BP, when low productivity prevailed in the study area.

show abstract

An almost completed pollution-recovery cycle reflected by sediment geochemistry and benthic foraminiferal assemblages in a Swedish–Norwegian Skagerrak fjord

Cited by 35 publications

References 62 publications

Can benthic foraminifera serve as proxies for changes in benthic macrofaunal community structure? Implications for the definition of reference conditions

Can benthic foraminifera serve as proxies for changes in benthic macrofaunal community structure? Implications for the definition of reference conditions

Geological record of extreme floods and anthropogenic impacts on an industrialised bay: The inner Abra of Bilbao (northern Spain)

Late Holocene palaeoproductivity changes: a multi‐proxy study in the Norwegian Trench and the Skagerrak, North Sea

Contact Info

Product

Resources

About