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307 results for “benthic foraminifera”
Benthic Foraminifera Carbon Gradient Proxy in the Southeast Pacific
<p>Release for paper 'Carbon stable isotopes of deep infaunal and epifaunal benthic foraminifera in the Southeast Pacific: lessons from shallow-water samples for a paleoxygenation proxy" (in preparation)' to be submitted to Biogeosciences.</p>
BFR2: a curated benthic foraminifera ribosomal reference database
<p>The present data set provides a fasta file, a tab-separated text file, and an Excel file. The fasta file includes 5,324 18S rDNA reference sequences for benthic foraminifera. The tab-separated text file includes the following fields: BFR2 number = unique internal sequence accession number; length = sequence length; class = class to which each sequence is assigned; order/suborder/clade = order/suborder/clade to which each sequence is assigned; family = family to which each sequence is assigned; genus = genus to which each sequence is assigned; species = species to which each sequence is assigned; isolate number = unique DNA extraction number; clone/direct: indicates whether it has been directly sequenced or cloned; genbank_accession = NCBI sequence accession number; sampling site = biogeographic region where the specimen has been collected; latitude in decimal degrees, longitude in decimal degrees; collection date = year in which specimen was collected; collector = person who collected the specimen; publication = publication associated to the sequence; journal = journal associated to publication; first author = first author associated to publication/sequence; taxonomic remarks = additional taxonomic information/comment; sampling remarks = addional sampling information/comment.<br><br>List of added or updated:<br>- Clone/direct: indicates whether it has been directly sequenced or cloned.<br>- Latitude and longitude in decimal degrees.<br>- Genbank accession number of 1700 18S rRNA sequences added.</p>
Linked collectors and determiners for: (Appendix H) Benthic foraminifera groups in ODP Hole 172-1055B.
Natural history specimen data linked to collectors and determiners held within, "(Appendix H) Benthic foraminifera groups in ODP Hole 172-1055B". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/f72b3447-2ae8-4dee-904a-0bd96ed19730">https://bionomia.net/dataset/f72b3447-2ae8-4dee-904a-0bd96ed19730</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/f72b3447-2ae8-4dee-904a-0bd96ed19730">https://gbif.org/dataset/f72b3447-2ae8-4dee-904a-0bd96ed19730</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: (Appendix G) Benthic foraminifera accumulation rates of ODP Site 167-10121.
Natural history specimen data linked to collectors and determiners held within, "(Appendix G) Benthic foraminifera accumulation rates of ODP Site 167-10121". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/f738a892-2b88-476f-bfc2-dce4b9c0ffa5">https://bionomia.net/dataset/f738a892-2b88-476f-bfc2-dce4b9c0ffa5</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/f738a892-2b88-476f-bfc2-dce4b9c0ffa5">https://gbif.org/dataset/f738a892-2b88-476f-bfc2-dce4b9c0ffa5</a>. Formatted as a Frictionless Data package.
FIG. 4. — A-J in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 4. — A-J, Nummulites fichteli Michelotti, 1841; A, equatorial section and external view, megalospheric form, İl-6B/3; B, equatorial section, megalospheric form, İl-6C/1; C, oblique equatorial section and external view, microspheric form, İl-7/B; D, oblique equatorial section and external view, microspheric form, İl- 7/A; E, external view, İl-6C/3; F-J, axial sections, İl-6B/2, İl-7/A, İl-6C/2, İl-6B/5. Scale bars: A, C, D, F, G, 1 mm; B, H-J, 0.5 mm; E, 2 mm.
FIG. 5. — A, B in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 5. — A, B, Operculina complanata (Defrance, 1822); A, equatorial section, İl-6C/2; B, incomplete equatorial section, İl-6B/2; C, J, Nummulites fichteli Michelotti, 1841; C, external view, İl-6C/3; J, axial section, megalospheric form, İl-6A; D-G, Nephrolepidina praemarginata (Douvillé, 1908); D, axial section, İl-6A; E, external view, İl-6B/4; F, axial section, megalospheric form, İl-6C/1; G, axial section, İl-6B/2. H, I, Eulepidina sp., subaxial sections, İl-6A, İl-6B/5. Scale bars: A, 1 mm; B, D-G, L, 0.5 mm; C, I, J, 2 mm.
FIG. 3 in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 3. — Stratigraphic and sedimentological cross sections and stratigraphic correlations of selected locations in the Burdur area. Oligocene palaeogeographic evolution of Burdur Fan.
FIG. 2 in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 2. — Details of the measured sections. Columns at right show the dominance of the facies throughout the successions.
FIG. 1. — A, B in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 1. — A, B, Geological map of the studied area with generalized stratigraphic section (modified from Şenel 1997).
FIG. 6 in Oligocene larger benthic foraminifera and sedimentation of the Burdur Basin, SW Anatolia, Turkey
FIG. 6. — The chart of Oligocene-Lower Miocene larger foraminiferal biozones (Cahuzac & Poignant 1997).
Global diversity patterns of larger benthic foraminifera under future climate change
<p><span>Global warming threatens the viability of tropical coral reefs and associated marine calcifiers, including symbiont-bearing larger benthic foraminifera (LBF). The impacts of current climate change on LBF are debated because they were particularly diverse and abundant during past warm periods. Studies on the responses of selected LBF species to changing environmental conditions reveal varying results. </span><span>Based on a comprehensive review of the scientific literature on LBF species occurrences, we applied species distribution modeling using Maxent to estimate present-day and future species richness patterns on a global scale for the time periods 2040–2050 and 2090–2100. </span><span> </span><span>For our future projections, we focus on Representative Concentration Pathway 6.0 from the Intergovernmental Panel on Climate Change, which projects mean surface temperature changes of +2.2°C by the year 2100. This data set comprises all raw data and results. </span>Our results suggest that species richness in the Central Indo-Pacific is two to three times higher than in the Bahamian ecoregion, which we have identified as the present-day center of LBF diversity in the Atlantic. Our future predictions project a dramatic temperature-driven decline in low-latitude species richness and an increasing widening bimodal latitudinal pattern of species diversity. While the central Indo-Pacific, now the stronghold of LBF diversity, is expected to be most pushed outside of the currently realized niches of most species, refugia may be largely preserved in the Atlantic. LBF species will face large-scale non-analogous climatic conditions compared to currently realized climate space in the near future, as reflected in the extensive areas of extrapolation, particularly in the Indo-Pacific. Our study supports hypotheses that species richness and biogeographical patterns of LBF will fundamentally change under future climate conditions, possibly initiating a faunal turnover by the late 21st century.</p>
Benthic and Planktic Foraminifera Counts from Concession 20D on the Orange Shelf, South Africa.
<p>Benthic and planktic foraminifera counts from three vibracores within Concession 20D on the Orange Shelf of western South Africa. The vibracores from which foraminifera were subsampled include inner shelf core 12820D, outer shelf core 14820D, and outer shelf core 14620D. Counts are presented as absolute abundances and were counted to a 300-300 benthic-planktic threshold. Where this threshold could not be met, the total amount of benthic and planktic foraminifera for all sampled sediment was noted. </p>
Dinoflagellate cysts and benthic foraminifera from surface sediments of Svalbard fjords and shelves as paleoenvironmental indicators
<p>Supplementary Table 1. Seasonally averaged sea-ice cover, SST and SSS data used for the multivariate statistical analysis.</p> <p>Supplementary Table 2. Relative abundances of individual dinoflagellate cyst taxa, total cyst concentration [cysts g<sup>-1</sup>], and relative abundance of auto- and heterotrophic cysts at each station.</p> <p>Supplementary Table 3. Relative abundances of individual benthic foraminifera taxa, total benthic foraminifera concentration [forams g<sup>-1</sup>], and relative abundance of calcareous and agglutinated benthic foraminifera at each station.</p>
Global diversity patterns of larger benthic foraminifera under future climate change
Open the record for dataset details and reuse information.
Data from: Environmental influence on growth history in marine benthic foraminifera
Energy availability influences natural selection on the ontogenetic histories of organisms. However, it remains unclear if physiological controls on size remain constant throughout ontogeny or instead shift as organisms grow larger. Benthic foraminifera provide an opportunity to quantify and interpret the physicochemical controls on both initial (proloculus) and adult volumes across broad environmental gradients using first principles of cell physiology. Here, we measured proloculus and adult test dimensions of 129 modern rotaliid species from published images of holotype specimens using holotype size to represent the maximum size of all species' occurrences across the North American continental margin. We merged size data with mean annual temperature, dissolved oxygen concentration, particulate organic carbon flux, and seawater calcite saturation for 718 unique localities to quantify the relationship between physicochemical variables and among-species adult/proloculus size ratios. We find that correlation of community mean adult/proloculus size ratios with environmental parameters reflects co-variation of adult test volume with environmental conditions. Among-species proloculus sizes do not co-vary identifiably with environmental conditions, consistent with the expectation that environmental constraints on organism size impose stronger selective pressures on adult forms due to lower surface area-to-volume ratios at larger sizes. Among-species adult/proloculus size ratios of foraminifera occurring in resource-limited environments are constrained by the limiting resource in addition to temperature. Identified limiting resources are food in oligotrophic waters and oxygen in oxygen minimum zones. Because among-species variations in adult/proloculus size ratios from the North American continental margin are primarily driven by the local environment's influence on adult sizes, the evolution of foraminiferal sizes over the Phanerozoic may have been strongly influenced by changing oceanographic conditions. Furthermore, lack of correspondence between among-species proloculus sizes and environmental conditions suggests that offspring size in foraminifera are rarely limited by physiological constraints and are more susceptible to selection related to other aspects of fitness.
Twenty-two thousand Common Era benthic foraminifera from the Santa Barbara Basin
<p>Here we provide an image and 2D shape dataset of recent benthic foraminifera from two core records sampled from the center of the Santa Barbara Basin that span an ~800-year-long interval during the Common Era (1249-2008 CE). Information on more than 36,000 objects is included, of which more than 22,000 are complete or partially damaged benthic foraminifera. Skeletonized objects classified also include planktonic foraminifera, ostracods, pteropods, diatoms, radiolarians, fish teeth and skeletal structures, shark dermal denticles, and benthic foraminifer test fragments. The image dataset was produced using a high-throughput imaging method (<em>AutoMorph</em>) designed to extract 2D data from photographic images of fossils. This repository contains 8 distinct data types uploaded as distinct files, and includes the following:</p> <ol> <li><strong><em>bulk_images.zip</em>: </strong>Bulk images with objects identified by <em>segment</em> boxed in red</li> <li><strong><em>individual_images.zip</em>:</strong> EDF images of individual objects within the dataset</li> <li><strong><em>identification_files.zip</em>:</strong> Classifications for individual objects, including both general categories and species-specific classifications (when possible) for benthic foraminifera</li> <li><strong><em>cleaning_scripts.zip</em>:</strong> Directory containing R scripts used to clean object category misspellings or inconsistencies</li> <li><strong><em>outline_images.zip</em>:</strong> EDF images of objects successfully extracted for 2D outlines and measurements; included for quality control. This includes one text file (unextracted_objects_2D.txt) listing objects with failed extractions</li> <li><strong><em>2d_coordinates.zip</em>:</strong> CSV files containing all extracted outline coordinates for each of the samples imaged, a text file of failed 2D extractions (unextracted_objects_2D.txt), and a summary CSV file including coordinates for all extracted objects (all_coordinates.csv)</li> <li><strong><em>2d_properties.zip</em>:</strong> 2D measurements for all objects</li> <li><strong><em>metadata_tables.zip</em>: </strong>Tables 1, 2, and 3 and Supplementary Table 1 from a forthcoming data descriptor publication, describing sample metadata, including site coordinates, sample names, object information, and summary statistics</li> </ol> <p>The dataset we provide here comprises the most extensive publicly available archive of benthic foraminiferal morphology and 2D morphological variation to date.</p>
Oxygen concentration profiles data and code from: Langet et al., 2023, Single-celled bioturbators: benthic foraminifera mediate oxygen penetration and prokaryotic diversity in intertidal sediment
<p>This archive contains the data of measured oxygen profile and the scripts used to generate the oxygen surface fluxes for the article</p><p>Langlet, D., Mermillod-Blondin, F., Deldicq, N., Bauville, A., Duong, G., Konecny, L., Hugoni, M., Denis, L., and Bouchet, V. M. P.: Single-celled bioturbators: benthic foraminifera mediate oxygen penetration and prokaryotic diversity in intertidal sediment, Biogeosciences, 20, 4875–4891, https://doi.org/10.5194/bg-20-4875-2023, 2023.</p>
Fig. 77 in "Larger" Benthic Foraminifera Of The Cenomanian. A Review Of The Identity And The Stratigraphic And Palaeogeographic Distribution Of Non-Fusiform Planispiral (Or Near-Planispiral) Forms
Fig. 77 Cenomanian paleogeographic distribution of Rajkanella hottingerinaformis.
Fig. 81 in "Larger" Benthic Foraminifera Of The Cenomanian. A Review Of The Identity And The Stratigraphic And Palaeogeographic Distribution Of Non-Fusiform Planispiral (Or Near-Planispiral) Forms
Fig. 81 Cenomanian paleogeographic distribution of Scandonea? pumila.
Fig. 65 in "Larger" Benthic Foraminifera Of The Cenomanian. A Review Of The Identity And The Stratigraphic And Palaeogeographic Distribution Of Non-Fusiform Planispiral (Or Near-Planispiral) Forms
Fig. 65 Cenomanian paleogeographic distribution of Pseudorhapydionina chiapanensis.
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