Archive · collection · 2019
Planktic foraminiferal test size and size normalised weight from IODP site U1313, ODP site 999 and DSDP site 610 during the Pliocene
Listed in PANGAEA
Atmospheric carbon dioxide (pCO2atm) is impacting the ocean and marine organisms.
Description
To assess potential impacts of climate change on carbonate production in the open ocean, we measured size and weight of planktic foraminifers during the late Pliocene at pCO2atm concentrations comparable to today and temperatures 2 to 3 °C warmer. Size of all foraminifers was measured at Atlantic Ocean DSDP Site 610, ODP Site 999, and IODP Site U1313.
Test size was smaller during the Pliocene than in modern assemblages under the same environmental conditions. During the cold marine isotope stage (MIS) M2, size increased at Site 999, potentially linked to intensified stratification of the surface ocean in response to the closure of the Central American Seaway. At site U1313, test size tracks the warming throughout the late Pliocene.
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Size normalised weight (SNW) of Globigerina bulloides at Site U1313, decreased during warmer temperature intervals. SNW of Globigerinoides ruber (white) at Site 999 displays high-frequency variability not correlated to temperature. Yet, during the glacial period within MIS M2 weight was higher during higher temperatures.
Our results support studies in the modern which challenge the view that carbonate chemistry is the primary driver for calcification. To better understand processes driving changes in SNW, computer tomography was used to quantify calcite to volume ratios. During interglacial periods lower calcite volume but higher test volume suggests less suitable conditions for calcification.
As this signal is not evident in SNW, subtle changes in calcification might not be observed by the weight-based method.
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Where it is published
- DOI doi.org/10.1594/pangaea.897346 ↗
DOI / persistent id · from PANGAEA
Catalogue records · 1
- OAI-PMH record ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=oai_dc&identifier=o… ↗
metadata API · from PANGAEA
Topics
- From keywords
- Earth & Environmental Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| PANGAEA | oai:pangaea.de:doi:10.1594/PANGAEA.897346 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · PANGAEA | connector:pangaea@1.0.0 | |
| description | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/description |
| license | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/rights |
| publication_date | source · PANGAEA | connector:pangaea@1.0.0 | |
| spatial | source · PANGAEA | connector:pangaea@1.0.0 | |
| title | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/title |