HOW HAVE MACROPERFORATE PLANKTONIC FORAMINIFER BIOGEOGRAPHIES VARIED THROUGH THE CENOZOIC?

2018 ◽  
Author(s):  
Adam D. Woodhouse ◽  
◽  
Tracy L. Aze ◽  
Alexander M. Dunhill ◽  
Paul B. Wignall ◽  
...  
Keyword(s):  
Planktonic Foraminifer

scholarly journals FAME (v1.0): a simple module to simulate the effect of planktonic foraminifer species-specific habitat on their oxygen isotopic content

2018 ◽  
Vol 11 (9) ◽  
pp. 3587-3603 ◽  
Author(s):  
Didier M. Roche ◽  
Claire Waelbroeck ◽  
Brett Metcalfe ◽  
Thibaut Caley
Keyword(s):  
Late Holocene ◽  
Simple Module ◽  
Climatic Conditions ◽  
Model Data ◽  
Planktonic Foraminifer ◽  
Planktonic Foraminifers ◽  
Oxygen Isotopic ◽  
Species Specific ◽  
Almost All ◽  
Multiproxy Approach

Abstract. The oxygen-18 to oxygen-16 ratio recorded in fossil planktonic foraminifer shells has been used for over 50 years in many geoscience applications. However, different planktonic foraminifer species generally yield distinct signals, as a consequence of their specific living habitats in the water column and along the year. This complexity is usually not taken into account in model–data integration studies. To overcome this shortcoming, we developed the Foraminifers As Modeled Entities (FAME) module. The module predicts the presence or absence of commonly used planktonic foraminifers and their oxygen-18 values. It is only forced by hydrographic data and uses a very limited number of parameters, almost all derived from culture experiments. FAME performance is evaluated using the Multiproxy Approach for the Reconstruction of the Glacial Ocean surface (MARGO) Late Holocene planktonic foraminifer calcite oxygen-18 and abundance datasets. The application of FAME to a simple cooling scenario demonstrates its utility to predict changes in planktonic foraminifer oxygen-18 to oxygen-16 ratio in response to changing climatic conditions.

Advances in planktonic foraminifer research: New perspectives for paleoceanography

2018 ◽  
Vol 61 (3-4) ◽  
pp. 113-138 ◽  
Author(s):  
Ralf Schiebel ◽  
Sandi M. Smart ◽  
Anna Jentzen ◽  
Lukas Jonkers ◽  
Raphaël Morard ◽  
...  
Keyword(s):  
Planktonic Foraminifer

Effects of feeding frequency on life processes of the planktonic foraminifer Globigerinoides sacculifer in laboratory culture

1981 ◽  
Vol 61 (1) ◽  
pp. 257-277 ◽  
Author(s):  
A. W. H. Bé ◽  
D. A. Caron ◽  
O. R. Anderson
Keyword(s):  
Survival Time ◽  
Survival Data ◽  
Inverse Correlation ◽  
Laboratory Culture ◽  
Control Group ◽  
Feeding Frequency ◽  
Planktonic Foraminifer ◽  
Shell Size ◽  
Average Survival ◽  
Feeding Regimes

Globigerinoides sacculifer (Brady), a common planktonic foraminifer collected by SCUBA off Barbados, was maintained under six feeding regimes at constant light and temperature conditions. Five groups of 63 specimens each were fed 1-day-old Anemia at the rate of one nauplius per specimen every 1, 2, 3, 4 or 7 days. A starved control group received no Anemia. The rate of chamber formation and shell size increased proportional to the feeding frequency. However, an inverse correlation existed between survival time and feeding frequency. Normally, survival time ends with gametogenesis which terminates the life of the mother cell. Organisms fed more frequently reached maturity and underwent gametogenesis more rapidly than those fed less frequently. The average survival time of G. sacculifer in culture ranged from 7 days for the daily-fed group to 11 days for the group fed every 7 days. While the latter grew more slowly they eventually reached maturity. Starved individuals rarely formed chambers and often died without undergoing gametogenesis. Symbiotic zooxanthellae presumably prolonged survival of starved organisms. Extrapolation of survival data suggests G. sacculifer has a variable life span of 2 to 4 weeks depending on food availability.

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