Planktonic foraminifera test size dictated by conditions in life and post-mortem
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10508596" target="_blank" >RIV/00216208:11310/25:10508596 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=fujDW~5iFD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=fujDW~5iFD</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.61551/gsjfr.55.3.320" target="_blank" >10.61551/gsjfr.55.3.320</a>
Alternative languages
Result language
angličtina
Original language name
Planktonic foraminifera test size dictated by conditions in life and post-mortem
Original language description
In this study, we quantify the impact of environmental conditions (temperature, productivity, and salinity) and taphonomic (carbonate dissolution) processes in the test (shell) size variation of planktonic foraminifera. To do so, we measured the cross-sectional area of over 16,000 tests from core SAT-048A, recovered from the Western South Atlantic. Core SAT-048A spans the last 45 ka and was collected in a highly dynamic (palae)oceanographic setting. We perform multiple linear correlation analyses that reveal significant relations between the test sizes and the studied environmental parameters, notably, smaller sizes during periods of intensified upwelling, which is consequent with enhanced carbonate dissolution. We hypothesise that smaller sizes of Globigerinoides ruber (comprising Globigerinoides ruber albus and Globigerinoides elongatus) might result from slower metabolic rates of its symbionts under high productivity conditions where increased suspended particles attenuate the incoming light. Globigerinoides ruber is sometimes considered a dissolution-prone species; thus, its apparent smaller sizes may (also) be due to carbonate dissolution. The remineralisation of exported organic matter decreases the pH of the seawater, meaning carbonate tests can fragment, a process often signposted by the loss of the thinner and more fragile terminal chamber. We document the interplay between living and post-mortem conditions, noting that they are additive in the fossil record. This paper provides a framework to understand the differential effect of dissolution on calcite tests, which without proper identification can lead to underestimation of test sizes (by ~25+-9%) and planktonic foraminifera fragmentation, potentially impacting all foraminifera-based ecology and geochemical proxies. Finally, we highlight the use of different size descriptors and environmental parameters to better comprehend the effect of living and post-mortem conditions in the test size variation of planktonic foraminifera.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Foraminiferal Research
ISSN
0096-1191
e-ISSN
1943-264X
Volume of the periodical
55
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
320-335
UT code for WoS article
001578088200005
EID of the result in the Scopus database
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