Academic Journal
Implication of size fraction on benthic foraminiferal-based paleo-reconstructions: A case study from the Bay of Biscay (NE Atlantic)
| العنوان: | Implication of size fraction on benthic foraminiferal-based paleo-reconstructions: A case study from the Bay of Biscay (NE Atlantic) |
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| المؤلفون: | Depuydt, Pauline, Barras, Christine, Toucanne, Samuel, Fossile, Eleonora, Mojtahid, Meryem |
| المساهمون: | Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG), Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Geo-Ocean (GEO-OCEAN), Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), CNRS-INSU-LEFE (IMAGO-CYBER) program (STING project)ARTEMIS 14C AMS French INSU projectRegion Pays de la Loire programs (Rising Star project TANDEM), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
| المصدر: | ISSN: 0377-8398 ; Marine Micropaleontology ; https://hal.science/hal-04056105 ; Marine Micropaleontology, 2023, 181, pp.102242. ⟨10.1016/j.marmicro.2023.102242⟩. |
| بيانات النشر: | CCSD Elsevier |
| سنة النشر: | 2023 |
| المجموعة: | Université de Nantes: HAL-UNIV-NANTES |
| مصطلحات موضوعية: | Benthic foraminifera, Fossil faunas, Size fractions, Paleo-records, Holocene/deglacial, Last glacial period, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| الوصف: | International audience ; Many paleoenvironmental studies based on benthic foraminiferal assemblages use different protocols for sample analysis. A standardized protocol has been recently established for biomonitoring applications, but for paleostudies, the influence of size fraction on benthic foraminiferal composition and biodiversity is poorly documented. We studied fossil foraminiferal assemblages along two paleorecords (BOBGEO-CS05 and SU81–44) from the Bay of Biscay covering the last ~35 ka cal BP. We investigated diversity and community composition to compare the impact of each size fraction (63-150 μm, >150 μm, >63 μm) on environmental interpretations. Foraminiferal diversity was affected by the accumulation of small opportunistic species. In terms of faunal composition, both paleorecords displayed a different pattern depending on the size fraction selected. While in both cores, the 63-150 μm fraction blurred the signal of some rare indicator species, our results show that i) in BOBGEO-CS05, it yielded no extra ecological information compared to the large fraction whereas ii) in SU81–44, it contained small opportunistic species that were not present in the >150 μm, impacting therefore paleoenvironmental interpretations. According to these findings, we recommend: i) to focus on the large fraction for a thorough taxonomic determination and a detailed analysis of benthic assemblages, and ii) to analyse the small fraction separately after a taxonomical identification of major species and strategic selection of studied samples. Although the 125 μm size limit was not tackled in this study, we recommend to use it for the limit between the small and large fractions instead of 150 μm for harmonization with the previously published standardized protocol for living faunas. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1016/j.marmicro.2023.102242 |
| الاتاحة: | https://hal.science/hal-04056105 https://hal.science/hal-04056105v1/document https://hal.science/hal-04056105v1/file/1-s2.0-S0377839823000415-main.pdf https://doi.org/10.1016/j.marmicro.2023.102242 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.93969442 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.marmicro.2023.102242 |
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