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Factors affecting consistency and accuracy in identifying modern macroperforate planktonic foraminifera

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doi: 10.5194/jm-37-431-2018
Authors:Fenton, Isabel S.; Baranowski, Ulrike; Boscolo-Galazzo, Flavia; Cheales, Hannah; Fox, Lyndsey; King, David J.; Larkin, Christina; Latas, Marcin; Liebrand, Diederik; Miller, C. Giles; Nilsson-Kerr, Katrina; Piga, Emanuela; Pugh, Hazel; Remmelzwaal, Serginio; Roseby, Zoe A.; Smith, Yvonne M.; Stukins, Stephen; Taylor, Ben; Woodhouse, Adam; Worne, Savannah; Pearson, Paul N.; Poole, Christopher R.; Wade, Bridget S.; Purvis, Andy
Author Affiliations:Primary:
Natural History Museum, Department of Life Sciences, London, United Kingdom
University of Birmingham, United Kingdom
Cardiff University, United Kingdom
Natural History Museum, United Kingdom
University of Cambridge, United Kingdom
University of Bremen, Germany
Open University, United Kingdom
University of Bristol, United Kingdom
University of Southampton, United Kingdom
University of Leeds, United Kingdom
University of Saint Andrews, United Kingdom
University of Nottingham, United Kingdom
University College London, United Kingdom
Volume Title:Journal of Micropalaeontology
Source:Journal of Micropalaeontology, 37(2), p.431-443. Publisher: British Micropalaeontological Society, London, United Kingdom. ISSN: 0262-821X
Publication Date:2018
Note:In English. 39 refs.; illus., incl. 4 tables
Summary:Planktonic foraminifera are widely used in biostratigraphic, palaeoceanographic and evolutionary studies, but the strength of many study conclusions could be weakened if taxonomic identifications are not reproducible by different workers. In this study, to assess the relative importance of a range of possible reasons for among-worker disagreement in identification, 100 specimens of 26 species of macroperforate planktonic foraminifera were selected from a core-top site in the subtropical Pacific Ocean. Twenty-three scientists at different career stages - including some with only a few days experience of planktonic foraminifera - were asked to identify each specimen to species level, and to indicate their confidence in each identification. The participants were provided with a species list and had access to additional reference materials. We use generalised linear mixed-effects models to test the relevance of three sets of factors in identification accuracy: participant-level characteristics (including experience), species-level characteristics (including a participant's knowledge of the species) and specimen-level characteristics (size, confidence in identification). The 19 less experienced scientists achieve a median accuracy of 57 %, which rises to 75 % for specimens they are confident in. For the 4 most experienced participants, overall accuracy is 79 %, rising to 93 % when they are confident. To obtain maximum comparability and ease of analysis, everyone used a standard microscope with only 35 × magnification, and each specimen was studied in isolation. Consequently, these data provide a lower limit for an estimate of consistency. Importantly, participants could largely predict whether their identifications were correct or incorrect: their own assessments of specimen-level confidence and of their previous knowledge of species concepts were the strongest predictors of accuracy.
Subjects:Accuracy; Biologic evolution; Biostratigraphy; Factors; Foraminifera; Identification; Microfossils; Modern; Morphology; Ocean Drilling Program; Paleo-oceanography; Planktonic taxa; Size; Statistical analysis; Subtropical environment; Taxonomy; Variance analysis; Leg 144; North Pacific; Northwest Pacific; ODP Site 872; Pacific Ocean; West Pacific; Globoconella inflata; Pulleniatina obliquiloculata
Coordinates:N100851 N100851 E1625157 E1625157
Record ID:843153-2
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany
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