http://lod.bco-dmo.org/id/dataset/991444
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2026-01-15
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Planktic foraminifera assemblages in the eastern Pacific during the last deglaciation determined from core MAZ-1E-04 collected on cruise MAZ-I aboard the R/V El Puma in April 2015
2026-04-08
publication
2026-04-08
revision
Woods Hole Oceanographic Institution (WHOI BCO-DMO)
2026-04-13
publication
https://doi.org/10.26008/1912/bco-dmo.991444.1
Catherine V. Davis
North Carolina State University
principalInvestigator
Maria Luisa Machain-Castillo
Universidad Nacional Autónoma de México
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Alcorn, R., Machain-Castillo, M. L., Davis, C. V. (2026) Planktic foraminifera assemblages in the eastern Pacific during the last deglaciation determined from core MAZ-1E-04 collected on cruise MAZ-I aboard the R/V El Puma in April 2015. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-04-08 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.991444.1 [access date]
Planktic foraminifera assemblages MAZ-1E-04 Dataset Description: Methods and Sampling: <p>Please see Alcorn et al. (2026) for a more detailed methodology.</p>
<p>Core MAZ-1E-04 (MAZ-I E04G) was collected on the oceanographic cruise MAZ-I aboard the R/V "El Puma" on April 28, 2015 using a gravity corer.</p>
<p>Sediments from core MAZ-1E-04 had previously been sampled at 1 cm intervals and washed over a 63 µm sieve. A total of 15 planktic foraminifera assemblages with n &gt; 300 individuals from the &gt; 150 µm size fraction were completed spanning 140.5-51.5 cm (~20.5 to 10 ka). Samples were split using a microfossil splitter into fractions ranging from 1/128 to 3/8. Samples contained between 315 to 762 planktic individuals, and all planktic foraminifera within a given fraction were identified to the species level (Brummer and Kučera, 2022). Relative abundances were calculated for each planktic species by dividing species abundance over total planktic foraminiferal abundance. Some <em>Globorotaloides hexagonus </em>were removed before completing assemblages. The number removed from an entire sample was multiplied by the split picked and added to <em>G. hexagonus</em> counts.&nbsp;</p>
<p>Species identified and counted in dataset are as follows:&nbsp;</p>
<ul>
<li>Globigerina bulloides (urn:lsid:marinespecies.org:taxname:113434)</li>
<li>Globigerinoides ruber (white) (urn:lsid:marinespecies.org:taxname:113444)</li>
<li>Trilobatus sacculifer (urn:lsid:marinespecies.org:taxname:1026286)</li>
<li>Globigerinita glutinata (urn:lsid:marinespecies.org:taxname:113464)</li>
<li>Neogloboquadrina dutertrei (urn:lsid:marinespecies.org:taxname:113473)</li>
<li>Neogloboquadrina incompta (urn:lsid:marinespecies.org:taxname:113474)</li>
<li>Globorotalia cultrata (urn:lsid:marinespecies.org:taxname:1417053)</li>
<li>Globorotalia tumida (urn:lsid:marinespecies.org:taxname:418114)</li>
<li>Globigerinella siphonifera (urn:lsid:marinespecies.org:taxname:113440)</li>
<li>Orbulina universa (urn:lsid:marinespecies.org:taxname:113460)</li>
<li>Globoturborotalita rubescens (urn:lsid:marinespecies.org:taxname:113454)</li>
<li>Globigerinoides tenellus (urn:lsid:marinespecies.org:taxname:418107)</li>
<li>Neogloboquadrina pachyderma (urn:lsid:marinespecies.org:taxname:113458)</li>
<li>Turborotalita quinqueloba (urn:lsid:marinespecies.org:taxname:113462)</li>
<li>Globigerinella radians (urn:lsid:marinespecies.org:taxname:993793)</li>
<li>Globorotaloides hexagonus (urn:lsid:marinespecies.org:taxname:1026605)</li>
<li>Globorotalia inflata&nbsp;(urn:lsid:marinespecies.org:taxname:113449)</li>
<li>Tenuitellita iota (urn:lsid:marinespecies.org:taxname:1567956)</li>
<li>Pulleniatina obliquiloculata (urn:lsid:marinespecies.org:taxname:221331)</li>
<li>Globorotalia truncatulinoides (urn:lsid:marinespecies.org:taxname:113453)</li>
<li>Globorotalia crassaformis (urn:lsid:marinespecies.org:taxname:418113)</li>
<li>Globigerinoides conglobatus (urn:lsid:marinespecies.org:taxname:113441)</li>
<li>Globorotalia scitula&nbsp;(urn:lsid:marinespecies.org:taxname:113452)&nbsp;</li>
</ul>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2154081 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2154081
completed
Catherine V. Davis
North Carolina State University
267-438-2198
701 Sumter St.
Columbia
SC
29208
USA
cdavis24@ncsu.edu
pointOfContact
Maria Luisa Machain-Castillo
Universidad Nacional Autónoma de México
machain@cmarl.unam.mx
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Depth_core
Age
Planktic_sample_split
G_bulloides
G_ruber
T_sacculifer
G_glutinata
N_dutertrei
N_incompta
G_cultrata
G_tumida
G_siphonifera
O_universa
G_scitula
G_rubescens
G_tenellus
N_pachyderma
T_quinqueloba
G_radians
G_hexagonus
G_inflata
T_iota
P_obliquiloculata
G_truncatulinoides
G_crassiformis
G_conglobatus
Unknown_planktics
Dry_weight
Benthic_abundance
gravity corer
theme
None, User defined
depth core
age
No BCO-DMO term
count
dry_wgt
abundance
featureType
BCO-DMO Standard Parameters
Gravity Corer
Microscope - Optical
instrument
BCO-DMO Standard Instruments
MAZ-I
service
Deployment Activity
Mexican Margin in the Eastern Tropical North Pacific
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Glacial-Interglacial Changes in Oxygen Minimum Zones Using Deep-Dwelling, Low-Oxygen Planktic Foraminifera
https://osprey.bco-dmo.org/project/914014
Glacial-Interglacial Changes in Oxygen Minimum Zones Using Deep-Dwelling, Low-Oxygen Planktic Foraminifera
<p>NSF abstract: </p>
<p>Oxygen minimum zones (OMZs) are naturally occurring regions of low oxygen found across large swaths of the ocean at depths of 100 to 1000 meters below the surface. OMZs play an important role in biogeochemical cycling and ecosystem function and any change in the expanse of their low oxygen waters can have far reaching implications for marine life and valuable fisheries resources. Marine oxygenation is variable on multiple timescales in response to global climate change, with recent observations showing that OMZs have expanded over the past half century. This project will explore promising new geochemical and morphologic proxies applicable to low-oxygen environments in the planktic foraminifer Globorotaloides hexagonus, a unicellular calcifying organism whose fossil record in seafloor sediments is well suited to reconstructing past low-oxygen environments in the water column. The project will focus on the extensive OMZ of the eastern tropical Pacific. The first goal is to evaluate and calibrate the targeted measurements for modern G. hexagonus collected live in plankton tows. The second goal is to apply these proxies to fossil specimens in sediment cores to generate records of glacial-Holocene change. The outcomes will be useable proxies for generating records of the OMZ environment, and a better understanding of how a major regional OMZ changed during the most recent period of rapid climate change. Both outcomes represent important progress towards understanding natural oscillations in the OMZ as well as modeling and planning for a changing OMZ in the face of global climate perturbations. The project will provide opportunities for undergraduate researchers as well as support a female early career researcher. </p>
<p>The marine sedimentary record is the most promising archive from which to reconstruct long term marine oxygenation. However, significant limitations exist in the available proxies for low oxygen marine environments. This project aims to address this need by evaluating and applying a range of promising geochemical (trace element and stable isotope) and morphologic (area-density and porosity) proxies relevant to low oxygen environments in the planktic foraminifer Globorotaloides hexagonus. The project will develop viable proxies based on the morphology and geochemistry of G. hexagonus shells previously collected in depth-distributed MOCNESS (Multiple Opening/Closing Net and Environmental Sensing System) tows from the eastern Pacific. The results from this proxy development in modern shells will then be ground-truthed and applied to two already well characterized sediment cores from the Mexican Margin and Panama Basin that span from the Last Glacial Maximum through the Holocene. The sediment records will be used to reconstruct past conditions in the eastern tropical Pacific OMZ, where significant questions about glacial-interglacial oxygenation persist. This research will lead to a more mechanistic understanding of how OMZs respond to climate more broadly.</p>
OMZ forams
largerWorkCitation
project
eng; USA
biota
oceans
Mexican Margin in the Eastern Tropical North Pacific
-106.91
-106.91
22.905
22.905
2015-04-27
2015-04-29
eastern Pacific
0
BCO-DMO catalogue of parameters from Planktic foraminifera assemblages in the eastern Pacific during the last deglaciation determined from core MAZ-1E-04 collected on cruise MAZ-I aboard the R/V El Puma in April 2015
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/996416.rdf
Name: Depth_core
Units: centimeter (cm)
Description: <p>Depth in sediment core</p>
http://lod.bco-dmo.org/id/dataset-parameter/996417.rdf
Name: Age
Units: years before present (ybp)
Description: <p>Calibrated sediment age in years before present</p>
http://lod.bco-dmo.org/id/dataset-parameter/996418.rdf
Name: Planktic_sample_split
Units: unitless
Description: <p>Portion of sample picked relative to total available material</p>
http://lod.bco-dmo.org/id/dataset-parameter/996419.rdf
Name: G_bulloides
Units: unitless
Description: <p>Number of individual G. bulloides removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996420.rdf
Name: G_ruber
Units: unitless
Description: <p>Number of individual G. ruber removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996421.rdf
Name: T_sacculifer
Units: unitless
Description: <p>Number of individual T. sacculifer removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996422.rdf
Name: G_glutinata
Units: unitless
Description: <p>Number of individual G. glutinata removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996423.rdf
Name: N_dutertrei
Units: unitless
Description: <p>Number of individual N. dutertrei removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996424.rdf
Name: N_incompta
Units: unitless
Description: <p>Number of individual N. incompta removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996425.rdf
Name: G_cultrata
Units: unitless
Description: <p>Number of individual G. cultrata removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996426.rdf
Name: G_tumida
Units: unitless
Description: <p>Number of individual G. tumida removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996427.rdf
Name: G_siphonifera
Units: unitless
Description: <p>Number of individual G. siphonifera removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996428.rdf
Name: O_universa
Units: unitless
Description: <p>Number of individual O. universa removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996429.rdf
Name: G_scitula
Units: unitless
Description: <p>Number of individual G. scitula removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996430.rdf
Name: G_rubescens
Units: unitless
Description: <p>Number of individual G. rubescens removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996431.rdf
Name: G_tenellus
Units: unitless
Description: <p>Number of individual G. tenellus removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996432.rdf
Name: N_pachyderma
Units: unitless
Description: <p>Number of individual N. pachyderma removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996433.rdf
Name: T_quinqueloba
Units: unitless
Description: <p>Number of individual T. quinqueloba removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996434.rdf
Name: G_radians
Units: unitless
Description: <p>Number of individual G. radians removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996435.rdf
Name: G_hexagonus
Units: unitless
Description: <p>Number of individual G. hexagonus removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996436.rdf
Name: G_inflata
Units: unitless
Description: <p>Number of individual G. inflata removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996437.rdf
Name: T_iota
Units: unitless
Description: <p>Number of individual T. iota removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996438.rdf
Name: P_obliquiloculata
Units: unitless
Description: <p>Number of individual P. obliquiloculata removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996439.rdf
Name: G_truncatulinoides
Units: unitless
Description: <p>Number of individual G. truncatulinoides removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996440.rdf
Name: G_crassiformis
Units: unitless
Description: <p>Number of individual G. crassiformis removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996441.rdf
Name: G_conglobatus
Units: unitless
Description: <p>Number of individual G. conglobatus removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996442.rdf
Name: Unknown_planktics
Units: unitless
Description: <p>Number of individual Unknown planktics removed from split</p>
http://lod.bco-dmo.org/id/dataset-parameter/996443.rdf
Name: Dry_weight
Units: grams (g)
Description: <p>Dry, total sediment weight</p>
http://lod.bco-dmo.org/id/dataset-parameter/996444.rdf
Name: Benthic_abundance
Units: individuals per gram
Description: <p>Number of benthic foraminifera per gram of dry sediment</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
https://doi.org/10.26008/1912/bco-dmo.991444.1
download
onLine
dataset
<p>Please see Alcorn et al. (2026) for a more detailed methodology.</p>
<p>Core MAZ-1E-04 (MAZ-I E04G) was collected on the oceanographic cruise MAZ-I aboard the R/V "El Puma" on April 28, 2015 using a gravity corer.</p>
<p>Sediments from core MAZ-1E-04 had previously been sampled at 1 cm intervals and washed over a 63 µm sieve. A total of 15 planktic foraminifera assemblages with n &gt; 300 individuals from the &gt; 150 µm size fraction were completed spanning 140.5-51.5 cm (~20.5 to 10 ka). Samples were split using a microfossil splitter into fractions ranging from 1/128 to 3/8. Samples contained between 315 to 762 planktic individuals, and all planktic foraminifera within a given fraction were identified to the species level (Brummer and Kučera, 2022). Relative abundances were calculated for each planktic species by dividing species abundance over total planktic foraminiferal abundance. Some <em>Globorotaloides hexagonus </em>were removed before completing assemblages. The number removed from an entire sample was multiplied by the split picked and added to <em>G. hexagonus</em> counts.&nbsp;</p>
<p>Species identified and counted in dataset are as follows:&nbsp;</p>
<ul>
<li>Globigerina bulloides (urn:lsid:marinespecies.org:taxname:113434)</li>
<li>Globigerinoides ruber (white) (urn:lsid:marinespecies.org:taxname:113444)</li>
<li>Trilobatus sacculifer (urn:lsid:marinespecies.org:taxname:1026286)</li>
<li>Globigerinita glutinata (urn:lsid:marinespecies.org:taxname:113464)</li>
<li>Neogloboquadrina dutertrei (urn:lsid:marinespecies.org:taxname:113473)</li>
<li>Neogloboquadrina incompta (urn:lsid:marinespecies.org:taxname:113474)</li>
<li>Globorotalia cultrata (urn:lsid:marinespecies.org:taxname:1417053)</li>
<li>Globorotalia tumida (urn:lsid:marinespecies.org:taxname:418114)</li>
<li>Globigerinella siphonifera (urn:lsid:marinespecies.org:taxname:113440)</li>
<li>Orbulina universa (urn:lsid:marinespecies.org:taxname:113460)</li>
<li>Globoturborotalita rubescens (urn:lsid:marinespecies.org:taxname:113454)</li>
<li>Globigerinoides tenellus (urn:lsid:marinespecies.org:taxname:418107)</li>
<li>Neogloboquadrina pachyderma (urn:lsid:marinespecies.org:taxname:113458)</li>
<li>Turborotalita quinqueloba (urn:lsid:marinespecies.org:taxname:113462)</li>
<li>Globigerinella radians (urn:lsid:marinespecies.org:taxname:993793)</li>
<li>Globorotaloides hexagonus (urn:lsid:marinespecies.org:taxname:1026605)</li>
<li>Globorotalia inflata&nbsp;(urn:lsid:marinespecies.org:taxname:113449)</li>
<li>Tenuitellita iota (urn:lsid:marinespecies.org:taxname:1567956)</li>
<li>Pulleniatina obliquiloculata (urn:lsid:marinespecies.org:taxname:221331)</li>
<li>Globorotalia truncatulinoides (urn:lsid:marinespecies.org:taxname:113453)</li>
<li>Globorotalia crassaformis (urn:lsid:marinespecies.org:taxname:418113)</li>
<li>Globigerinoides conglobatus (urn:lsid:marinespecies.org:taxname:113441)</li>
<li>Globorotalia scitula&nbsp;(urn:lsid:marinespecies.org:taxname:113452)&nbsp;</li>
</ul>
Specified by the Principal Investigator(s)
- Loaded sheet 1 from "Supplementary Table S2.xlsx" (xlsx format) using the filename as the resource name, treating empty strings and "nd" as missing values
- Renamed 29 fields to remove spaces, parentheses, and taxonomic punctuation (e.g., "Depth (cm)" to "Depth_core", "Age (ybp)" to "Age", "G. bulloides" to "G_bulloides", etc.)
- Exported file as "991444_v1_planktic_foraminifera_assemblages.csv"
- Species and Genus names listed in the Methods section verified as current accepted form on 2026-04-08, using the WoRMs World Registry of Marine Species database with two exceptions:
*Globorotalia crassaformis is unaccepted. The accepted term is Globorotalia (Truncorotalia) crassaformis (urn:lsid:marinespecies.org:taxname:1455327)
*Globorotalia inflata is unaccepted. The accepted term is Globoconella inflata (urn:lsid:marinespecies.org:taxname:1026410)
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
gravity corer
gravity corer
PI Supplied Instrument Name: gravity corer PI Supplied Instrument Description:Core MAZ-1E-04 (MAZ-I E04G) was collected on the oceanographic cruise MAZ-I aboard the R/V "El Puma" on April 28, 2015 using a gravity corer. Instrument Name: Gravity Corer Instrument Short Name:Gravity Corer Instrument Description: The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/51/
PI Supplied Instrument Name: PI Supplied Instrument Description:Samples were split using a microfossil splitter into fractions ranging from 1/128 to 3/8. Samples contained between 315 to 762 planktic individuals, and all planktic foraminifera within a given fraction were identified to the species level (Brummer and Kučera, 2022). Instrument Name: Microscope - Optical Instrument Short Name: Instrument Description: Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope". Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/
Cruise: MAZ-I
MAZ-I
R/V El Puma
vessel
MAZ-I
Alejandro Rodríguez-Ramírez
Universidad Nacional Autónoma de México
R/V El Puma
vessel