Unknown
PANGAEA
In:
Supplement to: Wade, Bridget S; Olsson, Richard K (2009): Investigation of pre-extinction dwarfing in Cenozoic planktonic foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology, 284(1-2), 39-46, https://doi.org/10.1016/j.palaeo.2009.08.026
Publication Date:
2024-04-25
Description:
We propose a phenomenon termed “pre-extinction dwarfing” in Cenozoic planktonic foraminifera. High-resolution morphometric analysis shows a reduction in maximum or mean test size in the 2-20 kyr interval preceding the extinction of Pliocene Globorotalia exilis and Globorotalia miocenica from the Caribbean Sea and middle Eocene Morozovelloides crassatus from the western North Atlantic. Through a series of case studies and review of qualitative observations from the literature, we suggest that dwarfing occurs in a number of species of planktonic foraminifera foreshadowing their demise and that such size changes are not just a phenomenon associated with mass extinction events. We propose that this is a common stress-induced pattern that results in diminutive size in the pre-extinction interval.
Keywords:
171-1052B; 171-1052F; AGE; Blake Nose, North Atlantic Ocean; Chamber number; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg171B; Morozovelloides crassatus; Morozovelloides crassatus, size; Morozovelloides crassatus, size, standard deviation; Ocean Drilling Program; ODP; Sample code/label; Sample comment
Type:
Dataset
Format:
text/tab-separated-values, 360 data points
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