Recent invasion of the foraminifer<i>Nonionella stella</i>Cushman &amp; Moyer, 1930 in northern European waters: evidence from the Skagerrak and its fjords

Asteman, Irina Polovodova; Schönfeld, Joachim

doi:10.1144/jmpaleo2015-007

Cited by 11 publications

(11 citation statements)

References 62 publications

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“…Nonionella sp. T1 is suggested to be an invasive species in the region which arrived by ship ballast tanks around 1985 and rapidly expanded to the Kattegat and Öresund (Asteman and Schönfeld, 2016). According to our dated core, the species arrived in the Öresund ∼ 2000 CE (Fig.…”

Section: -2009mentioning

confidence: 84%

“…Recently, the eastern Pacific morphospecies Nonionella stella has been presented as an invasive species in the Skagerrak-Kattegat region (Asteman and Schönfeld, 2016). However, a comparison of N. stella DNA sequences from the Santa Barbara Basin (USA) (Bernhard et al, 1997) with the Swedish western coast specimens demonstrates that they represent two closely related species but are not conspecific (Deldicq et al, 2019).…”

Section: Foraminifera Analysesmentioning

confidence: 99%

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Rapid environmental responses to climate-induced hydrographic changes in the Baltic Sea entrance

et al. 2019

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Abstract. The Öresund (the Sound), which is a part of the Danish straits, is linking the marine North Sea and the brackish Baltic Sea. It is a transition zone where ecosystems are subjected to large gradients in terms of salinity, temperature, carbonate chemistry, and dissolved oxygen concentration. In addition to the highly variable environmental conditions, the area is responding to anthropogenic disturbances in, e.g., nutrient loading, temperature, and pH. We have reconstructed environmental changes in the Öresund during the last ca. 200 years, and especially dissolved oxygen concentration, salinity, organic matter content, and pollution levels, using benthic foraminifera and sediment geochemistry. Five zones with characteristic foraminiferal assemblages were identified, each reflecting the environmental conditions for the respective period. The largest changes occurred around 1950, when the foraminiferal assemblage shifted from a low diversity fauna dominated by the species Stainforthia fusiformis to higher diversity and abundance and dominance of the Elphidium species. Concurrently, the grain-size distribution shifted from clayey to sandier sediment. To explore the causes of the environmental changes, we used time series of reconstructed wind conditions coupled with large-scale climate variations as recorded by the North Atlantic Oscillation (NAO) index as well as the ECOSMO II model of currents in the Öresund area. The results indicate increased changes in the water circulation towards stronger currents in the area after the 1950s. The foraminiferal fauna responded quickly (<10 years) to the environmental changes. Notably, when the wind conditions, and thereby the current system, returned in the 1980s to the previous pattern, the foraminiferal assemblage did not rebound. Instead, the foraminiferal faunas displayed a new equilibrium state.

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Section: -2009mentioning

confidence: 84%

Section: Foraminifera Analysesmentioning

confidence: 99%

Rapid environmental responses to climate-induced hydrographic changes in the Baltic Sea entrance

et al. 2019

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“…As endemic species were not recognised, any Recent littoral or near-shore foraminifera must have been transported to the islands. A long-range transport of propagules by ocean currents or adult individuals by transocean rafting, a medium-range displacement by ichtyochory, and the introduction of alien species by marine traffic or migratory birds have been invoked as dispersal mechanisms for benthic foraminifera (McGann et al 2000;Alve & Goldstein 2003;Riedel et al 2011;Polovodova Asteman & Schönfeld 2016;Guy-Haim et al 2017;Finger 2018). Indeed, source regions of the displaced species have to be identified first before migration routes are delineated and transport mechanisms are constrained (Lübbers & Schönfeld 2018).…”

Section: Discussionmentioning

confidence: 99%

Checklist, assemblage composition, and biogeographic assessment of Recent benthic foraminifera (Protista, Rhizaria) from São Vincente, Cape Verdes

Schönfeld

Lübbers

2020

Zootaxa

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We describe for the first time subtropical intertidal foraminiferal assemblages from beach sands on São Vincente, Cape Verdes. Sixty-five benthic foraminiferal species were recognised, representing 47 genera, 31 families, and 8 superfamilies. Endemic species were not recognised. The new checklist largely extends an earlier record of nine benthic foraminiferal species from fossil carbonate sands on the island. Bolivina striatula, Rosalina vilardeboana and Millettiana milletti dominated the living (rose Bengal stained) fauna, while Elphidium crispum, Amphistegina gibbosa, Quinqueloculina seminulum, Ammonia tepida, Triloculina rotunda and Glabratella patelliformis dominated the dead assemblages. The living fauna lacks species typical for coarse-grained substrates. Instead, there were species that had a planktonic stage in their life cycle. The living fauna therefore received a substantial contribution of floating species and propagules that may have endured a long transport by surface ocean currents. The dead assemblages largely differed from the living fauna and contained redeposited tests deriving from a rhodolith-mollusc carbonate facies at <20 m water depth. A comparison of the Recent foraminiferal inventory with other areas identified the Caribbean and Mediterranean as the most likely source regions. They have also been constrained as origin points for littoral to subtidal macroorganisms on other Cape Verdean islands. Micro-and macrofaunal evidences assigned the Cape Verde Current and North Equatorial Current as the main trajectories for faunal immigrations. The contribution from the NW African coast was rather low, a pattern that cannot be explained by the currently available information.

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“…Several Nonionella morphospecies, bearing a star-like extension of the chambers covering the umbilicus, are described, such as Nonionella digitata Nørvang (1945), Nonionella opima Cushman (1947) or Nonionella stella Cushman and Moyer (1930). Nonionella digitata is restricted to the Arctic region (Hayward et al, 2020), whereas N. opima is identified in the Gulf of Mexico, the Mediterranean and the Bay of Biscay (Hayward et al, 2020) and N. stella is considered a cosmopolitan species (Asteman & Schönfeld, 2016). However, a recent molecular study shows specimens identified as N. stella in the Skagerrak, NE Atlantic, forming a separate clade from N. stella identified off California (Deldicq et al, 2019), and should be named differently.…”

Section: Taxonomic Assignmentmentioning

confidence: 99%

Foraminiferal Mn/Ca as Bottom‐Water Hypoxia Proxy: An Assessment of Nonionella stella in the Santa Barbara Basin, USA

Brinkmann

Schweizer

et al. 2021

Paleoceanog and Paleoclimatol

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Hypoxia is of increasing concern in marine areas, calling for a better understanding of mechanisms leading to decreasing dissolved oxygen concentrations ([O2]). Much can be learned about the processes and implications of deoxygenation for marine ecosystems using proxy records from low‐oxygen sites, provided proxies, such as the manganese (Mn) to calcium (Ca) ratio in benthic foraminiferal calcite, are available and well calibrated. Here we report a modern geochemical data set from three hypoxic sites within the Santa Barbara Basin (SBB), USA, where we study the response of Mn/Caforam in the benthic foraminifer Nonionella stella to variations in sedimentary redox conditions (Mn, Fe) and bottom‐water dissolved [O2]. We combine molecular species identification by small subunit rDNA sequencing with morphological characterization and assign the SBB N. stella used here to a new phylotype (T6). Synchrotron‐based scanning X‐ray fluorescence (XRF) imaging and Secondary Ion Mass Spectrometry (SIMS) show low Mn incorporation (partition coefficient DMn < 0.05) and limited proxy sensitivity of N. stella, at least within the range of dissolved [O2] (2.7–9.6 μmol/l) and Mnpore‐water gradients (2.12–21.59 μmol/l). Notably, even though intra‐ and interspecimen Mn/Ca variability (33% and 58%, respectively) was only partially controlled by the environment, Mn/Caforam significantly correlated with both pore‐water Mn and bottom‐water [O2]. However, the prevalent suboxic bottom‐water conditions and limited dissolved [O2] range complicate the interpretation of trace‐elemental trends. Additional work involving other oxygenation proxies and samples from a wider oxygen gradient should be pursued to further develop foraminiferal Mn/Ca as an indicator for hypoxic conditions.

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Recent invasion of the foraminiferNonionella stellaCushman & Moyer, 1930 in northern European waters: evidence from the Skagerrak and its fjords

Cited by 11 publications

References 62 publications

Rapid environmental responses to climate-induced hydrographic changes in the Baltic Sea entrance

Rapid environmental responses to climate-induced hydrographic changes in the Baltic Sea entrance

Checklist, assemblage composition, and biogeographic assessment of Recent benthic foraminifera (Protista, Rhizaria) from São Vincente, Cape Verdes

Foraminiferal Mn/Ca as Bottom‐Water Hypoxia Proxy: An Assessment of Nonionella stella in the Santa Barbara Basin, USA

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