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Gregarious suspension feeding in a modular Ediacaran organism

dc.contributor.authorGibson, Brandt M.
dc.contributor.authorRahman, Imran A.
dc.contributor.authorMaloney, Katie M.
dc.contributor.authorRacicot, Rachel A.
dc.contributor.authorMocke, Helke
dc.contributor.authorLaflamme, Marc
dc.contributor.authorDarroch, Simon A. F.
dc.date.accessioned2020-03-19T20:59:09Z
dc.date.available2020-03-19T20:59:09Z
dc.date.issued2019-06
dc.identifier.citationB.M. Gibson, I.A. Rahman, K.M. Maloney, R.A. Racicot, H.Mocke, M.Laflamme,S.A. F.Darroch, Gregarious suspension feeding in a modular Ediacaran organism. Sci. Adv.5, eaaw0260 (2019).en_US
dc.identifier.issn2375-2548
dc.identifier.urihttps://ir.vanderbilt.edu/xmlui/handle/1803/9861
dc.description.abstractReconstructing Precambrian eukaryotic paleoecology is pivotal to understanding the origins of the modern, animal-dominated biosphere. Here, we combine new fossil data from southern Namibia with computational fluid dynamics (CFD) to test between competing feeding models for the Ediacaran taxon Ernietta. In addition, we perform simulations for multiple individuals, allowing us to analyze hydrodynamics of living communities. We show that Ernietta lived gregariously, forming shallow marine aggregations in the latest Ediacaran, 548 to 541 million years (Ma) ago. We demonstrate enhanced vertical mixing of the water column above aggregations and preferential redirection of current into body cavities of downstream individuals. These results support the reconstruction of Ernietta as a macroscopic suspension feeder and also provide a convincing paleoecological advantage to feeding in aggregations analogous to those recognized in many extant marine metazoans. These results provide some of the oldest evidence of commensal facilitation by macroscopic eukaryotes yet recognized in the fossil record.en_US
dc.description.sponsorshipM.L. was funded by the Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant (RGPIN 435402) and the National Geographic (grant no. 9241-14). I.A.R. was funded by the Oxford University Museum of Natural History. S.A.F.D. acknowledges generous funding from the National Geographic (grant no. 9968-16) and a Paleontological Society Arthur Boucot Award.en_US
dc.language.isoen_USen_US
dc.publisherSCIENCE ADVANCESen_US
dc.subjectMYTILUS-EDULIS-Len_US
dc.subjectPRECAMBRIAN METAZOANS;en_US
dc.subjectMUSSELen_US
dc.subjectDYNAMICSen_US
dc.subjectTRACESen_US
dc.subjectSIZEen_US
dc.subjectFLOWen_US
dc.subjectCOMMUNITIESen_US
dc.subjectVENDOBIONTAen_US
dc.subjectDICKINSONIAen_US
dc.titleGregarious suspension feeding in a modular Ediacaran organismen_US
dc.typeArticleen_US


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