File:Brachios vs bivalves fossil record.svg
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Summary
[edit]DescriptionBrachios vs bivalves fossil record.svg |
English: Diversity curves of brachiopods and bivalves from the Cambrian to the Pleistocene at the genus level.
Deutsch: Diversitätskurven von Armfüßern (Brachiopoda) und Muscheln (Bivalvia) vom Kambrium bis zum Pleistozän auf Gattungsniveau. |
Date | |
Source | Own work (created using Gnuplot 5.2, based on raw data downloaded from fossilworks.org, for details see below) |
Author | Gretarsson |
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Sources and methods
[edit]The curves in the diagram are based on data obtained from genus occurrence records that were downloaded from fossilworks.org. For Brachiopoda[1] the raw data set comprised a total of 168,020 occurrences of 3,673 genera, which were extracted from 5,676 references. For Bivalvia[2] the the raw data set comprised a total of 174,812 occurrences of 2,483 genera, which were extracted from 7,415 references. Most occurrences are placed in so-called 10-million-year bins (10-my bins) by the database software according to the chronostratigraphic assignment of their host rock in the references. The Phanerozoic comprises a total of 49 10-my bins (‘Cambrian 1’ [Fortunian] to ‘Cenozoic 6’ [Upper Miocene + Pliocene + Pleistocene]). The downloaded data set was modified using MS Excel as follows:
- all occurrences that were not assigned to a particular 10-my bin (e.g. when the chronostratigraphy given in the literature was too unprecise, or in all Holocene occurrences) were eliminated from the data set
- multiple occurrences of the same genus per 10-my bin were reduced to one
- the remaining occurrences were summed up for each 10-my bin
The resulting data sets comprised 8,277 occurrences for Brachiopoda and 8,441 occurences for Bivalvia. The occurence values in the diagram are plotted at the ‘mean date’ for each 10-my bin (e.g. the bin ‘Triassic 1’ ranges from −252.3 Ma to −247.2 Ma, so the genus occurence values for this bin are plotted at −249.75 Ma).
References
[edit]- ↑ Clapham, M. E., W. Kiessling, A. I. Miller, P. J. Wagner, B. Kröger, M. Foote, F. T. Fursich, J. Alroy, M. E. Patzkowsky, S. M. Holland, A. J. W. Hendy, D. J. Bottjer, T. D. Olszewski, M. Aberhan, P. M. Novack-Gottshall, L. C. Ivany, J. Pálfy (2019): Taxonomic occurrences of Brachiopoda, recorded in Fossilworks, the Evolution of Terrestrial Ecosystems database, the Paleobiology Database, and the Paleogeographic Atlas Project database. Fossilworks. http://fossilworks.org archive copy at the Wayback Machine.
- ↑ Kiessling, W., A. J. W. Hendy, M. E. Clapham, A. I. Miller, M. Aberhan, F. T. Fursich, J. Alroy, P. J. Wagner, M. E. Patzkowsky, M. D. Uhen, M. Foote, J. A. Sessa, D. J. Bottjer, L. C. Ivany, M. T. Carrano, L. Villier, S. M. Holland, B. Kröger, A. J. McGowan, T. D. Olszewski (2019): Taxonomic occurrences of Bivalvia, recorded in Fossilworks, the Evolution of Terrestrial Ecosystems database, the Paleobiology Database, and the Paleogeographic Atlas Project database. Fossilworks. http://fossilworks.org archive copy at the Wayback Machine.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:12, 2 March 2019 | 800 × 340 (24 KB) | Gretarsson (talk | contribs) | Spanish switch text: ‘N+C’ instead of ‘N+Q’, for ‘Quaternary’ in Spanish is ‘Cuaternario’ | |
23:12, 1 March 2019 | 800 × 340 (24 KB) | Gretarsson (talk | contribs) | some cosmetics | ||
22:45, 1 March 2019 | 800 × 350 (25 KB) | Gretarsson (talk | contribs) | {{Information |description ={{en|1=Diversity curves of brachiopods and bivalves from the Cambrian to the Pleistocene at the genus level.}} {{de|1=Diversitätskurven von Armfüßern (Brachiopoda) Muscheln (Bivalvia) vom Kambrium bis zum Pleistozän auf Gattungsniveau.}} |date =2019-03-01 |source ={{own}} (created using Gnuplot 5.2, based on raw data downloaded from [http://fossilworks.org fossilworks.org]) |author =User:Gretarsson }} Category:Fossil record [[Cate... |
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Short title | Generic paleobiodiversity of brachiopods vs bivalves |
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Image title | Produced by GNUPLOT 5.2 patchlevel 2; created by Gretarsson; based on data downloaded from http://fossilworks.org |
Width | 800 |
Height | 340 |