OUP accepted manuscript

Kučera, Michal; Silye, Lóránd; Weiner, Agnes; Darling, Kate; Lübben, Birgit; Holzmann, Maria; Pawłowski, Jan; Schönfeld, Joachim; Morard, Raphaël

doi:10.1093/plankt/fbx018

Cited by 11 publications

(11 citation statements)

References 48 publications

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“…Darling et al (2009) demonstrated that modern benthic Bolivina variabilis and modern planktic Streptochilus globigerus are actually genetically identical. Additional work by Kucera et al (2017) has identified five phylogenetic clades within Bolivina, one of which is populated by exclusively benthic individuals as might be expected, one of which is populated by exclusively planktic individuals ("Streptochilus"), and three clades of which are populated by both benthic and planktic individuals. Bolivina and Streptochilus are the same foraminifer that can express two different test morphologies (e.g., Smart and Thomas, 2007;Kucera et al, 2017), and thus, Streptochilus is a junior synonym of Bolivina (Darling et al, 2009).…”

Section: Isotopic Evidence For the First Benthic And Lacustrine Occurmentioning

confidence: 72%

“…Additional work by Kucera et al (2017) has identified five phylogenetic clades within Bolivina, one of which is populated by exclusively benthic individuals as might be expected, one of which is populated by exclusively planktic individuals ("Streptochilus"), and three clades of which are populated by both benthic and planktic individuals. Bolivina and Streptochilus are the same foraminifer that can express two different test morphologies (e.g., Smart and Thomas, 2007;Kucera et al, 2017), and thus, Streptochilus is a junior synonym of Bolivina (Darling et al, 2009). Bolivina variabilis might be able to grow to adulthood and express both Bolivina and Streptochilus test morphologies in both planktic and benthic environments (Darling et al, 2009).…”

Section: Isotopic Evidence For the First Benthic And Lacustrine Occurmentioning

confidence: 72%

See 1 more Smart Citation

Freshwater plumes and brackish lakes: Integrated microfossil and O-C-Sr isotopic evidence from the late Miocene and early Pliocene Bouse Formation (California-Arizona) supports a lake overflow model for the integration of the lower Colorado River corridor

et al. 2018

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Section: Isotopic Evidence For the First Benthic And Lacustrine Occurmentioning

confidence: 72%

Section: Isotopic Evidence For the First Benthic And Lacustrine Occurmentioning

confidence: 72%

Freshwater plumes and brackish lakes: Integrated microfossil and O-C-Sr isotopic evidence from the late Miocene and early Pliocene Bouse Formation (California-Arizona) supports a lake overflow model for the integration of the lower Colorado River corridor

et al. 2018

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“…4 could be shown to be identical to new sequences extracted from specimens identified as Globigerinita glutinata . All sequences named Streptochilus globigerus were renamed Bolivina variabilis after Kucera et al [15]. The 61 DNA sequences extracted from “unidentified” small specimens could all be identified as belonging to sequences represented in the extended barcode dataset.…”

Section: Resultsmentioning

confidence: 99%

“…The remaining 4% of the reads show affinities to various groups of benthic foraminifera and are partitioned into a larger number of OTUs. These reads likely represent a mixture of planktonic foraminifera morphospecies without barcodes and specimens of benthic foraminifera present in the plankton due to a combination of passive advection in coastal regions or as reproductive strategy [15].…”

Section: Discussionmentioning

confidence: 99%

“…This included 396 single-cell sequences assigned in PFR 2 to Globoquadrina conglomerata , Streptochilus globigerus , Galitelia vivans , Candeina nitida , Globigerinita glutinata , Globoigerinita uvula and to 4 unindentified rotaliid species. We also retrieved 57 sequences from NCBI of the species Bolivina variabilis published in an earlier work [15]. We have observed inconsistencies in the labelling between the newly generated sequences and some sequences available in the public databases.…”

Section: Methodsmentioning

confidence: 99%

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Unassigned diversity of planktonic foraminifera from environmental sequencing revealed as known but neglected species

et al. 2019

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Most research on extant planktonic foraminifera has been directed towards larger species (>0.150 mm) which can be easily manipulated, counted and yield enough calcite for geochemical analyses. This has drawn attention towards the macroperforate clade and created an impression of their numerical and ecological dominance. Drawing such conclusions from the study of such “giants” is a dangerous path. There were times in the evolutionary history of planktonic foraminifera when all species were smaller than 0.1 mm and indeed numerous small taxa, mainly from the microperforate clade, have been formally described from the modern plankton. The significance of these small, obscure and neglected species is poorly characterized and their relationship to the newly discovered hyperabundant but uncharacterized lineages of planktonic foraminifera in metabarcoding datasets is unknown. To determine, who is hiding in the metabarcoding datasets, we carried out an extensive sequencing of 18S rDNA targeted at small and obscure species. The sequences of the newly characterized small and obscure taxa match many of the previously uncharacterized lineages found in metabarcoding data. This indicates that most of the modern diversity in planktonic foraminifera has been taxonomically captured, but the role of the small and neglected taxa has been severely underestimated.

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Strategies in times of crisis—insights into the benthic foraminiferal record of the Palaeocene–Eocene Thermal Maximum

Schmidt

Thomas

Authier

et al. 2018

Phil. Trans. R. Soc. A.

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Climate change is predicted to alter temperature, carbonate chemistry and oxygen availability in the oceans, which will affect individuals, populations and ecosystems. We use the fossil record of benthic foraminifers to assess developmental impacts in response to environmental changes during the Palaeocene–Eocene Thermal Maximum (PETM). Using an unprecedented number of µ-computed tomography scans, we determine the size of the proloculus (first chamber), the number of chambers and the final size of two benthic foraminiferal species which survived the extinction at sites 690 (Atlantic sector, Southern Ocean, palaeodepth 1900 m), 1210 (central equatorial Pacific, palaeodepth 2100 m) and 1135 (Indian Ocean sector, Southern Ocean, palaeodepth 600–1000 m). The population at the shallowest site, 1135, does not show a clear response to the PETM, whereas those at the other sites record reductions in diameter or proloculus size. Temperature was similar at all sites, thus it is not likely to be the reason for differences between sites. At site 1210, small size coincided with higher chamber numbers during the peak event, and may have been caused by a combination of low carbonate ion concentrations and low food supply. Dwarfing at site 690 occurred at lower chamber numbers, and may have been caused by decreasing carbonate saturation at sufficient food levels to reproduce. Proloculus size varied strongly between sites and through time, suggesting a large influence of environment on both microspheric and megalospheric forms without clear bimodality. The effect of the environmental changes during the PETM was more pronounced at deeper sites, possibly implicating carbonate saturation.This article is part of a discussion meeting issue ‘Hyperthermals: rapid and extreme global warming in our geological past’.

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OUP accepted manuscript

Cited by 11 publications

References 48 publications

Freshwater plumes and brackish lakes: Integrated microfossil and O-C-Sr isotopic evidence from the late Miocene and early Pliocene Bouse Formation (California-Arizona) supports a lake overflow model for the integration of the lower Colorado River corridor

Freshwater plumes and brackish lakes: Integrated microfossil and O-C-Sr isotopic evidence from the late Miocene and early Pliocene Bouse Formation (California-Arizona) supports a lake overflow model for the integration of the lower Colorado River corridor

Unassigned diversity of planktonic foraminifera from environmental sequencing revealed as known but neglected species

Strategies in times of crisis—insights into the benthic foraminiferal record of the Palaeocene–Eocene Thermal Maximum

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