Diversity of Benthic Foraminifera on the Shelf and Slope of the Ne Atlantic: Analysis of Datasets

Dorst, Sabine; Schönfeld, Joachim

doi:10.2113/gsjfr.43.3.238

Cited by 29 publications

(9 citation statements)

References 66 publications

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“…Among potential bioindicators, there are also some globothalamids, such as Stainforthia sp., Virgulinella fragilis, Reophax sp., and Cibicidoides fletcheri. Cibicidoides species is common in the North Atlantic 103 , but to the best of our knowledge, it was not recorded in Svalbard before. One of the major signs of atlantification is the northward shift of boreal species, the trend observed in the case of zooplankton, fish, and benthic organisms 97 .…”

Section: Influence Of Atlantification On Foraminifera Communitymentioning

confidence: 81%

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Nguyen

Pawłowska

Angeles

et al. 2021

Preprint

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Arctic marine biodiversity is undergoing rapid changes due to global warming and modifications of oceanic water masses circulation. These changes have been demonstrated in the case of mega- and macrofauna, but much less is known about their impact on the biodiversity of smaller size organisms, such as foraminifera that represents a main component of meiofauna in the Arctic. Several studies analysed the distribution and diversity of Arctic foraminifera. However, all these studies are based exclusively on the morphological identification of specimens sorted from sediment samples. Here, we present the first assessment of Arctic foraminifera diversity based on metabarcoding of sediment DNA samples collected in fjords and open sea areas in Svalbard Archipelago. We obtained a total of 5,968,786 reads that represented 1,384 ASVs. More than half of the ASVs (51.7%) could not be assigned to any group in the reference database suggesting a high genetic novelty of Svalbard foraminifera. The sieved and unsieved samples resolved comparable communities, sharing 1023 ASVs, comprising over 97% of reads. Our analyses show that the foraminiferal assemblage differs between the localities, with communities distinctly separated between fjord and open sea stations. Each locality was characterized by a specific assemblage, with only a small overlap in the case of open sea areas. Our study demonstrates a clear pattern of the influence of water masses on the structure of foraminiferal communities. The stations situated on the western coast of Svalbard that is strongly influenced by warm and salty Atlantic Water (AW) are characterized by much higher diversity than stations in the northern and eastern part, where the impact of AW is less pronounced. This high diversity and specificity of Svalbard foraminifera associated with water mass distribution indicate that the foraminiferal metabarcoding data can be a very useful tool for inferring present and past environmental conditions in the Arctic.

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Section: Influence Of Atlantification On Foraminifera Communitymentioning

confidence: 81%

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Nguyen

Pawłowska

Angeles

et al. 2021

Preprint

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“…For most other benthic species depth distributions are not fixed [e.g., Wright , ; De Rijk et al , ]. However, of the species shaded in Table S4, Cibicides lobatulus , C. pachyderma , C. ungerianus , and Planulina ariminensis occur and Cassidulina laevigata , Hanzawaia boueana , Nonion fabum , and Valvulineria bradyana are most abundant in shelf environments [e.g., Schmiedl et al , ; De Stigter et al , ; Licari and Mackensen , ; Mojtahid et al , ; Dorst and Schönfeld , ].…”

Section: Resultsmentioning

confidence: 99%

Precessional variability of⁸⁷Sr/⁸⁶Sr in the late Miocene Sorbas Basin: An interdisciplinary study of drivers of interbasin exchange

et al. 2017

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We present the first subprecessional record of seawater 87Sr/86Sr isotope ratios for a marginal Mediterranean subbasin. The sediments contained in this interval (three precessional cycles between 6.60 and 6.55 Ma) are important because they record conditions during the transition to the Messinian Salinity Crisis (MSC; 5.97 to 5.33 Ma), an event for which many details are still poorly understood. The record, derived from planktic foraminifera of the late Miocene Sorbas Basin (SE Spain), shows brief excursions with precessional cyclicity to 87Sr/86Sr ratios higher than coeval ocean 87Sr/86Sr. The hydrologic conditions required to generate the observed record are investigated using box modeling, constrained using a new paleodepth estimate (150 to 250 m) based on benthic foraminiferal assemblages. The box model results highlight the role of climate‐driven interbasin density contrast as a significant driver of, or impediment to, exchange. The results are particularly significant in the context of the MSC, where 87Sr/86Sr excursions have been interpreted purely as a consequence of physical restriction. To replicate the observed temporal patterns of lithological variations and 87Sr/86Sr isotope excursions, the Sorbas Basin “box” must have a mainly positive hydrologic budget, in contrast with the Mediterranean's negative budget during the late Miocene. This result has implications for the assumption of synchronous deposition of specific sedimentary layers (sapropels) between marginal and open Mediterranean settings at subprecessional resolution. A net positive hydrologic budget in marginal Mediterranean subbasins may reconcile observations of freshwater inclusions in gypsum deposits.

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“…Despite of different factors affecting positively or negatively the estimation of the benthic foraminiferal diversity in Kuwait territorial waters, the here-reported γ (452) benthic foraminiferal diversity is relatively high and can be compared to the available records and census data in other basins, such as 799 species in the Aegean Sea [21], 818 species around the Korean peninsula [22], 946 species in the Sahul Shelf and Timor Sea [75], 987 species in the Gulf of Mexico [17] and 1107 species in the northwestern European continental margin [19]. These figures are somewhat higher than those of Kuwait, but it needs to be stressed that the herein considered area, namely Kuwait territorial water, has a limited extension compared to the previous ones (i.e., the Aegean Sea or the Gulf of Mexico).…”

Section: Discussionmentioning

confidence: 99%

“…They are inferred to play a major role in the biogeochemical cycles [14] and occupy a low trophic position in the food web [15]. A limited number of foraminiferal studies has covered extensive geographical areas [16][17][18][19][20][21][22], and the regional-synoptic approach documenting benthic foraminiferal diversity is currently quite limited [19]. Although benthic foraminifera have been largely studied in the Arabian Gulf [23-27], a limited knowledge of their diversity exists for the Kuwait coastal water [28], as most of the available studies have focused on their application as bioindicators [29,30].In light of this, the main objective of the present paper is to provide a checklist of recent benthic foraminiferal species and to infer the total biodiversity of this group of organisms in the Kuwait coastal marine areas on the basis of the available dataset published in the last fifty years, coupled with original data.…”

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confidence: 99%

Modern Benthic Foraminiferal Diversity: An Initial Insight into the Total Foraminiferal Diversity along the Kuwait Coastal Water

et al. 2020

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Kuwait territorial water hosts an important part of national biodiversity (i.e., zooplankton and phytoplankton), but very limited information exists on the overall diversity of benthic foraminifera. On the basis of the integration of publications, reports and theses with new available data from the Kuwait Bay and the northern islands, this study infers the total benthic foraminiferal diversity within Kuwait territorial water. This new literature survey documents the presence of 451 species belonging to 156 genera, 64 families, 31 superfamilies and 9 orders. These values are relatively high in consideration of the limited extension and the shallow depth of the Kuwait territorial water. Kuwait waters offer a variety of different environments and sub-environments (low salinity/muddy areas in the northern part, embayment, rocky tidal flats, coral reef systems, islands and shelf slope) that all together host largely diversified benthic foraminiferal communities. These figures are herein considered as underestimated because of the grouping of unassigned species due to the lack of reference collections and materials, as well as the neglection of the soft-shell monothalamids (‘allogromiids’).

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Diversity of Benthic Foraminifera on the Shelf and Slope of the Ne Atlantic: Analysis of Datasets

Cited by 29 publications

References 66 publications

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Precessional variability of⁸⁷Sr/⁸⁶Sr in the late Miocene Sorbas Basin: An interdisciplinary study of drivers of interbasin exchange

Modern Benthic Foraminiferal Diversity: An Initial Insight into the Total Foraminiferal Diversity along the Kuwait Coastal Water

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Diversity of Benthic Foraminifera on the Shelf and Slope of the Ne Atlantic: Analysis of Datasets

Cited by 29 publications

References 66 publications

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Metabarcoding Reveals High Diversity of Benthic Foraminifera Driven by Atlantification of Coastal Svalbard

Precessional variability of87Sr/86Sr in the late Miocene Sorbas Basin: An interdisciplinary study of drivers of interbasin exchange

Modern Benthic Foraminiferal Diversity: An Initial Insight into the Total Foraminiferal Diversity along the Kuwait Coastal Water

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Precessional variability of⁸⁷Sr/⁸⁶Sr in the late Miocene Sorbas Basin: An interdisciplinary study of drivers of interbasin exchange