Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Department of Geosciences, Bremen University GeoB http://www.geo.uni-bremen.de/page.php?langid=EN https://ror.org/04ers2y35 Heidersdorf Felix University of Bremen Uni Bremen http://www.uni-bremen.de/en.html https://ror.org/04ers2y35 2026 Nannofossil absolute abundances of sediment core GeoB2204-2 dataset https://doi.pangaea.de/10.1594/PANGAEA.993440 2026-04-07T09:28:23 The calcareous nannofossil assemblages from sediment core GeoB2204-2 from the western equatorial region off Brazil were examined to document oceanographic changes in surface waters during the last 155 ka. Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x or 5,000x magnification. The recorded fluctuations in the abundance and composition of coccolithophore communities reflect changes in surface water masses. The community is dominated by species from the deeper photic zone, such as Florisphaera profunda and Gladiolithus flabellatus, indicating predominantly oligotrophic conditions during glacial periods. During interglacial periods, higher abundances and larger proportions of species with an affinity for nutrient-rich surface waters indicate the highest abundances. Heidersdorf Felix 2000 Palökologische Untersuchungen der Coccolithophoridengemeinschaften im Kern GeoB 2204-2 (äquatorialer Westatlantik) für den Zeitraum der letzten 155 ka thesis Unpubl. Diplomarbeit (Master Thesis), University of Bremen 57 pp -34.021666666667 -34.021666666667 -8.5283333333333 -8.5283333333333 -34.021666666667 -8.5283333333333 1993-03-22T00:00:00 1993-03-22T00:00:00 0.145 3.645 GeoB2204-2 -8.5283333333333 -34.021666666667 -2072.0 1993-03-22T00:00:00 8.97 m Brazil Basin M23/3 https://doi.org/10.2312/cr_m23 Wefer, Gerold 1993-03-21 1993-04-12 Recife, Brazil Las Palmas, Spain 19940114 Meteor (1986) https://en.wikipedia.org/wiki/RV_Meteor_(1986) DBBH 8411279 Gravity corer (Kiel type) SL weight on top of sediment 2130 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Depth sed [m] Depth, corrected Depth corr m depth http://purl.obolibrary.org/obo/PATO_0001595 Length L http://dbpedia.org/resource/Length Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Depth corr [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Age [ka BP] Coccoliths, total Cocco 10**6 #/g total https://www.oxforddictionaries.com/definition/american_english/total Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Cocco [10**6 #/g] Acanthoica spp. Acanthoica spp. 10**6 #/g Acanthoica https://www.marinespecies.org/aphia.php?p=taxdetails&id=115083 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Acanthoica spp. [10**6 #/g] Calciosolenia brasiliensis C. brasiliensis 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=555889 Calciosolenia brasiliensis https://www.marinespecies.org/aphia.php?p=taxdetails&id=555889 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 C. brasiliensis [10**6 #/g] Calciosolenia murrayi C. murrayi 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235926 Calciosolenia murrayi https://www.marinespecies.org/aphia.php?p=taxdetails&id=235926 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 C. murrayi [10**6 #/g] Calcidiscus leptoporus C. leptoporus 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235923 Calcidiscus leptoporus https://www.marinespecies.org/aphia.php?p=taxdetails&id=235923 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 C. leptoporus [10**6 #/g] Calcidiscus quadriperforatus C. quadriperforatus 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=555946 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 C. quadriperforatus [10**6 #/g] Ceratolithus cristatus C. cristatus 10**6 #/g Ceratolithus cristatus https://www.marinespecies.org/aphia.php?p=taxdetails&id=235933 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 C. cristatus [10**6 #/g] Discosphaera tubifera D. tubifera 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=615464 Discosphaera tubifera https://www.marinespecies.org/aphia.php?p=taxdetails&id=573399 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 D. tubifera [10**6 #/g] Emiliania huxleyi E. huxleyi 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=115104 Emiliania huxleyi https://www.marinespecies.org/aphia.php?p=taxdetails&id=115104 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 E. huxleyi [10**6 #/g] Florisphaera profunda F. profunda 10**6 #/g Florisphaera profunda https://www.marinespecies.org/aphia.php?p=taxdetails&id=235952 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 F. profunda [10**6 #/g] Gephyrocapsa ericsonii G. ericsonii 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235954 Gephyrocapsa ericsonii https://www.marinespecies.org/aphia.php?p=taxdetails&id=235954 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 G. ericsonii [10**6 #/g] Gephyrocapsa muellerae G. muellerae 10**6 #/g Gephyrocapsa muellerae https://www.marinespecies.org/aphia.php?p=taxdetails&id=341588 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 G. muellerae [10**6 #/g] Gephyrocapsa oceanica G. oceanica 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235955 Gephyrocapsa oceanica https://www.marinespecies.org/aphia.php?p=taxdetails&id=235955 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 G. oceanica [10**6 #/g] Gephyrocapsa ornata G. ornata 10**6 #/g Gephyrocapsa ornata https://www.marinespecies.org/aphia.php?p=taxdetails&id=235956 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 G. ornata [10**6 #/g] Gladiolithus flabellatus G. flabellatus 10**6 #/g Gladiolithus flabellatus https://www.marinespecies.org/aphia.php?p=taxdetails&id=555948 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 G. flabellatus [10**6 #/g] Hayaster perplexus H. perplexus 10**6 #/g Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 H. perplexus [10**6 #/g] Helicosphaera carteri H. carteri 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=615435 Helicosphaera carteri https://www.marinespecies.org/aphia.php?p=taxdetails&id=615435 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 H. carteri [10**6 #/g] Oolithotus fragilis O. fragilis 10**6 #/g Oolithotus fragilis https://www.marinespecies.org/aphia.php?p=taxdetails&id=235962 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 O. fragilis [10**6 #/g] Pontosphaera spp. Pontosphaera spp. 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=115082 Pontosphaera https://www.marinespecies.org/aphia.php?p=taxdetails&id=115082 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Pontosphaera spp. [10**6 #/g] Reticulofenestra sessilis R. sessilis 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=576682 Reticulofenestra sessilis https://www.marinespecies.org/aphia.php?p=taxdetails&id=576682 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 R. sessilis [10**6 #/g] Rhabdosphaera clavigera R. clavigera 10**6 #/g Rhabdosphaera clavigera https://www.marinespecies.org/aphia.php?p=taxdetails&id=235972 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 R. clavigera [10**6 #/g] Rhabdosphaera stylifera R. stylifera 10**6 #/g Rhabdosphaera stylifera https://www.marinespecies.org/aphia.php?p=taxdetails&id=236069 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 R. stylifera [10**6 #/g] Syracosphaera pulchra S. pulchra 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235979 Syracosphaera pulchra https://www.marinespecies.org/aphia.php?p=taxdetails&id=235979 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 S. pulchra [10**6 #/g] Syracosphaera spp. Syracosphaera spp. 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=115084 Syracosphaera https://www.marinespecies.org/aphia.php?p=taxdetails&id=115084 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Syracosphaera spp. [10**6 #/g] Umbilicosphaera hulburtiana U. hulburtiana 10**6 #/g Umbilicosphaera hulburtiana https://www.marinespecies.org/aphia.php?p=taxdetails&id=235984 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 U. hulburtiana [10**6 #/g] Umbilicosphaera sibogae U. sibogae 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235985 Umbilicosphaera sibogae https://www.marinespecies.org/aphia.php?p=taxdetails&id=235985 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 U. sibogae [10**6 #/g] Umbellosphaera irregularis U. irregularis 10**6 #/g Umbellosphaera irregularis https://www.marinespecies.org/aphia.php?p=taxdetails&id=235982 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 U. irregularis [10**6 #/g] Umbellosphaera tenuis U. tenuis 10**6 #/g http://www.marinespecies.org/aphia.php?p=taxdetails&id=235983 Umbellosphaera tenuis https://www.marinespecies.org/aphia.php?p=taxdetails&id=235983 Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 U. tenuis [10**6 #/g] Coccoliths, other Cocco oth 10**6 #/g Scanning electron microscope (SEM), Zeiss, DSM 940A Baumann Karl-Heinz baumann@uni-bremen.de 0000-0003-2109-5179 Cocco oth [10**6 #/g] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels coccolith abundances equatorial western Atlantic off Brazil author26516 author93 basis2 campaign56 curlevel30 event5558 geocode1 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst20712 inst4 license21 method11108 method8281 param135115 param151164 param151219 param151224 param151226 param15316 param15318 param156248 param156249 param156250 param156253 param164277 param20671 param527478 param557791 param6189 param6190 param6192 param6196 param9289 param9291 param9292 param9295 param9298 param9299 param9304 param9305 param9306 param9308 param9309 pi93 ref139044 term1061627 term1061642 term1061647 term1061677 term1061681 term1061684 term1061685 term1061686 term1061692 term1061728 term1061755 term1061762 term1061764 term1061765 term1061767 term1061770 term1061776 term1061851 term1061852 term1062263 term1062277 term1062444 term1062455 term1062824 term1073131 term1073135 term20458 term2256569 term38253 term38263 term41056 term43863 term43975 term52668 term53711 term77387