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Figs 23–26 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 23–26. Papposphaera sagittifera HOL (TEM / Figs 23–25; SEM / Fig. 26) from the Arctic (NEW / Figs 23–25; Svalbard / Fig. 26). 23–25 – complete cells showing flagella, haptonema (Fig. 25, arrow) and large numbers of tower-shaped holococcoliths projecting in all directions; 26 – high magnification of the hexagonal crystallite plates.

Fig. 3 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Fig. 3. Interpretational drawings of coccolith structure within species of Papposphaera. Intraspecific variation is shown where relevant. A – P. sagittifera; B – P. sagittifera cfr.; C – P. sarion; D – P. arctica; E – P. iugifera; F – P. heldalii; a – body coccolith central area calcification; b – calyx design; c – calicate coccolith central area calcification; d – holococcolith contour (flagellar pole coccolith); e – holococcolith contour (body coccolith). Notice the inclusion of schematic drawings of a rosette wing from each of the P. sagittifera types of calyces.

Figs 27–32 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 27–32. Papposphaera sagittifera cfr. HET. TEM whole mounts from the Antarctic (EPOS samples). 27 – complete cell with flagella and a curled up haptonema; 28 – high magnification of calyces (four-winged rosettes) from Fig. 27; 29 – high magnification of calyx from Fig. 30; 30 – complete cell with flagella and a curled up haptonema; 31 – detail of central area calcification from the cell in Fig. 30; 32 – details of rim structure from the cell shown in Fig. 30.

Figs 10–16 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 10–16. Papposphaera sagittifera HET (TEM / Fig. 13; SEM / Figs 10–12, 14–16) from the Arctic (Svalbard / Figs 10–12, 14–16; NEW / Fig. 13). 10–12 – whole cells selected to show the limited occurrence of coccoliths with central processes and the obvious irregularities in size and placement of the body coccoliths; 13 – whole cell showing flagella and haptonema; 14 – cell selected to illustrate the variability in coccolith size, orientation and central area calcification; notice the presence of two types of calyces (encircled); 15 – calyx of the standard 'flaring' P. sagittifera HET type (enlargement from Fig. 14); 16 – 'triangular' calyx (enlargement from Fig. 14) similar to those found in P. sagittifera HET when forming part of a combination coccosphere.

Figs 4–9 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 4–9. Papposphaera sagittifera HET (TEM / Figs 4–5, 7; SEM / Figs 6, 8–9) from the Arctic (West Greenland / Fig. 7; NEW / Figs 4–5; Svalbard / Figs 6, 8, 9). 4 – whole cell with curled up flagella and haptonema (arrow); 5 – detail of calyx; 6 – lateral view of coccolith displaying the two cycles of elements in the rim and details of the stem and the calyx; 7 – complete cell; notice the difference in length of coccolith processes from one end of the cell to the other; 8 – details of central area calcification; notice the short stub-like central proboscis and also possibly tilted pentagonal elements from the distal rim circle (arrows); 9 – detail of two coccoliths one with a short central process and the other with just a central upheaval of the arms of the crossbar.

Figs 38–43 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 38–43. Papposphaera sagittifera cfr. TEM combination coccospheres from Antarctica (EPOS / Figs 39, 42–43; ANT X/3 / Figs 38, 40–41). 38 – complete cell with flagella and haptonema; 39 – cell with just a few P. sagittefera cfr. HET coccoliths and 'Turrisphaera' holococcoliths that are highly asymmetrical at the anterior pole; 40 – detail of holococcoliths from the cell shown in Fig. 38; 41 – higher magnification of anterior cell end of the cell shown in Fig. 38 to show details of the calyces and the central area calcification; 42–43 – details of coccoliths from the cell shown in Fig. 39.

Figs 1–2 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 1–2. Maps of collection sites. 1 – northern hemisphere; 2 – southern hemisphere. Showing also the AMERIEZ sampling grid (Thomsen et al. 1988).

Figs 33–37 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 33–37. Turrisphaera sp. TEM whole mounts from the Antarctic (EPOS samples). 33 – complete cell with flagella and haptonema; 34 – whole cell at higher magnification showing the regular appearance of the tower-shaped holococcoliths; 35–36 – details of holococcoliths showing the hexagonal crystallite plates; 37 – complete cell.

Figs 17–22 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 17–22. Papposphaera sagittifera combination coccospheres (TEM whole mounts from West Greenland). 17 – separated halves of a combination coccosphere; 18 – detail of calyces from Fig. 17 showing the regular triangular outline; the arrow points to a rosette wing that has a distal stepwise notching; 19 – combination coccosphere with the two halves united; 20–21 – detail of the calyces from Fig. 19; the arrow (Fig. 20) points to a rosette wing with a distal step-wise notching; 22 – the four rosette wings are spread out in a fan-like manner clearly showing the shape of the individual wing: the arrow points to a rosette wing with a distal step-wise notching.

Figs 44–48 in Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and

Figs 44–48. Papposphaera sagittifera cfr. HOL. TEM whole mounts from the Antarctic (EPOS / Figs 45, 47–48; ANT X/3 / Figs 44, 46). 44 – details of highly asymmetrical flagellar pole holococcoliths; 45–47 – complete cells with flagella and haptonema; 48 – holococcoliths at high magnification.

opencc-by-4.0Mar 2010View details →

Fig. 1 in Procedures for Obtaining Optimal SEM Images of Coccolithophore Debris in Coccolith Limestones

Fig. 1. CCI images of coccolith material in different stages of fragmentation within faecal pellets in coccolith limestone. Cross−sections of complete and dismembered, variously oriented, coccospheres allow to observe their structures. A. Perpendicular cross−section of a coccosphere with well visible distal (d) and proximal (p) shields of placoliths joined by parallel calcite crystallites in wide central area (c). Interlocking of adjacent edges of placolith shields is particularly well visible. The structure of the central area is well visible as a net in horizontal cross−section of the plate in the right (c1), ZNG PAN B−III−75/3. B. Perpendicular cross−sections of coccospheres clearly show distal (d) and proximal (p) shields of placoliths, and central areas (c). The central areas are seen as narrow massive or open structures, depending on the orientation of cross−sections (compare c and c1). Note the very tight interlocking of adjacent edges of placolith shields and additional placoliths (x) within the coccosphere. The structures closing the central area are seen as a narrow open structure in horizontal view of placoliths (c2), ZNG PAN B−III−75/5. Both images were obtained in ESEM using SE under low vacuum, from non−coated polished thin section at WD, 10.1 mm, SS, 37 s/frame.

opencc-by-4.0Jul 2024View details →

Coccolithophore Abundance, Size, Carbon And Distribution Estimates (CASCADE)

<div>CASCADE is a global dataset for 139 extant coccolithophore taxonomic units. CASCADE includes a trait database (size and cellular organic and inorganic carbon contents) and taxonomic-specific global spatiotemporal distributions (Lat/Lon/Depth/Month/Year) of coccolithophore abundance and organic and inorganic carbon stocks. CASCADE covers all ocean basins over the upper 275 meters, spans the years 1964-2019 and includes 33,119 taxonomic-specific abundance observations. Within CASCADE, we characterise the underlying uncertainties due to measurement errors by propagating error estimates between the different studies.</div> <div> </div> <div>Full details of the data set are provided in the associated Scientific Data manuscript. The repository contains five main folders: 1) "Classification", which contains YAML files with synonyms, family-level classifications, and life cycle phase associations and definitions; 2) "Concatenated literature", which contains the merged datasets of size, PIC and POC and which were corrected for taxonomic unit synonyms; 3) "Resampled cellular datasets", which contains the resampled datasets of size, PIC and POC in long format as well as a summary table; 4) "Gridded data sets", which contains gridded datasets of abundance, PIC and POC; 5) "Species lists", which contains spreadsheets of the "common" (>20 obs) and "rare" (<20 obs) species and their number of observations.</div> <div> </div> <div>The CASCADE data set can be easily reproduced using the scripts and data provided in the associated github repository: <a title="Opens in new tab" href="https://github.com/nanophyto/CASCADE/tree/v0.1.1" target="_blank" rel="noopener">https://github.com/nanophyto/CASCADE/</a> (<a href="../doi/10.5281/zenodo.12797197">zenodo.12797197</a>)</div> <div> Correspondence to: Joost de Vries, joost.devries@bristol.ac.uk v.3 fixes: <ol> <li>actually fixes Guerreiro et al., 2023 longitude issue</li> <li>replaces negative PIC predictions from GLM with NA (an issue with some small HOL species)</li> </ol> v.2 fixes: 1. The wrongly specified S. neapolitana was removed from synonyms.yml (this species is now S. nana) 2. Longitudes were corrected for Guerreiro et al., 2023 3. A double entry for Dimizia et al., 2015 was fixed 4. Units in Sal et al., 2013 were correct to cells/L (previously cells/ml) 5. Data from Sal et al., 2013 was re-done, as some species were missing 6. Duplicate entries from Baumann et al., 2000 were dropped </div>

zenodo36/100

Supporting Data for "Coccolithophore Assemblage Response to Indian Monsoon-ENSO Teleconnections During the Last Century" - AGU Paleoceanography and Paleoclimatology

Data (Tables S1-S3) supporting the manuscript "Coccolithophore Assemblage Response to Indian Monsoon-ENSO Teleconnections During the Last Century". Files are uploaded as .csv format. Below are descriptions of the data generated from this study. In Table S1, the thickness data of von Rad et al. (1999), publicly available in <a href="https://doi.pangaea.de/10.1594/PANGAEA.63129" target="_blank" rel="noopener">PANGAEA,</a> were used to construct the revised core composite stratigraphy for Core SO90-39KG. Please refer to the manuscript for details of the referenced publication.   <table> <tbody> <tr> <td>Table</td> <td>Table Description</td> </tr> <tr> <td>S1</td> <td>Revised composite stratigraphy of core SO90-39KG.</td> </tr> <tr> <td>S2</td> <td>Raw count data of all coccolithophore species identified in sediment samples in core SO90-39KG.</td> </tr> <tr> <td>S3</td> <td>Relative abundance data of all coccolithophore species identified in sediment samples in core SO90-39KG.</td> </tr> </tbody> </table>

opencc-by-4.0Jun 2024View details →

zenodo36/100

Coccolithophore blooms days detected by MODIS Level-2 data in Algiers bay between 2003 and 2018

The figures illustrated in this document reflect the days where the coccolithophore blooms were detected for episodes shown in Figure 8 in Harid et al., (2023). The methodology used to produce these figures is described in Harid, (2022); Harid et al., (2023).   References: Harid, R. (2022). Étude par télédétection et mesures in-situ des efflorescences algales et de la matière en suspension dans le Bassin Algérien [PhD. thesis]. ENSSMAL, Algiers. Harid, R., Demarcq, H., Amanouche, S., Ait-Kaci, M., Bachari, N.-E.-I., & Houma, F. (2023). Detection of Coccolithophore Bloom Episodes in Algiers Bay Using Satellite and In Situ Analysis. In S. Niculescu (Éd.), European Spatial Data for Coastal and Marine Remote Sensing (p. 1‑15). Springer International Publishing. <a href="https://doi.org/10.1007/978-3-031-16213-8_1">https://doi.org/10.1007/978-3-031-16213-8_1</a>

opencc-by-4.0Jun 2022View details →

opencc-zeroMay 2023View details →

Morphometric data of the late middle Eocene to early Oligocene (~40 - 31 Ma) Coccolithophore Reticulofenestra (Order Isochrysidales)

The first size reduction (FSR) in the Reticulofenestra-Gephyrocapsa-Emiliania (RGE) lineage (Order Isochrysidales) which occurred in the early Oligocene (~ 32 Ma), is of great significance for understanding the lilliput effect that has affected the coccolithophore communities from late Eocene to this day. We conducted a morphologic analysis on the coccoliths of Reticulofenestra species that lived during the late middle Eocene to early Oligocene (~40-31 Ma), using marine sediments from the South Atlantic Ocean. Our data show increasing size and decreasing abundance of the large species during the late Eocene, leading to their disappearance at the FSR, and a concurrent decrease in the size variability of the small-medium-sized coccoliths whose diameter of the central opening had become very reduced. Although the cosmopolitan late Paleogene through Neogene size decrease in coccolithophores has been linked to the concomitant long-term decline in global pCO2, we suggest here that the FSR was the result of environmental destabilization caused by the expansion of eutrophic environments following the late Eocene establishment of overturning circulation associated with ice build-up on Antarctica. This study also leads us to propose a hypothetical model that links coccolith morphology of species of the RGE lineage and trophic resources in the upper ocean: the small- to medium-sized, r-selected coccolithophores with smaller coccolith central opening live in nutrient-rich waters where they rely mostly on photosynthesis and little on mixotrophy; whereas the larger, K-selected species with larger coccolith central opening live in oligotrophic waters where they are more dependent on mixotrophy.

publicApr 2023View details →

Coccolithophores and diatoms resilient to ocean alkalinity enhancement: a glimpse of hope?

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publicSep 2025View details →

Biological calcification rate and species-specific contributions of coccolithophores to total calcite inventory in the eastern Indian Ocean

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