RNames, a stratigraphical database designed for the statistical analysis of fossil occurrences – the Ordovician diversification as a case study

Kröger, Björn; Lintulaakso, Kari

doi:10.26879/729

Cited by 12 publications

(15 citation statements)

References 23 publications

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“…Depending on the statistical methodology used to construct the diversity curves, they are either smooth (e.g. Kröger & Lintulaakso, 2017;Kröger et al, 2019) or display different steps, indicating a 'cascading trend' (Rasmussen et al 2019) correlated with a range of cumulative extrinsic factors (Stigall et al 2019). However, in all cases sea-level change (e.g.…”

Section: Discussionmentioning

confidence: 99%

Early Palaeozoic diversifications and extinctions in the marine biosphere: a continuum of change

2019

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A review of biodiversity curves of marine organisms indicates that, despite fluctuations in amplitude (some large), a large-scale, long-term radiation of life took place during the early Palaeozoic Era; it was aggregated by a succession of more discrete and regionalized radiations across geographies and within phylogenies. This major biodiversification within the marine biosphere started during late Precambrian time and was only finally interrupted in the Devonian Period. It includes both the Cambrian Explosion and the Great Ordovician Biodiversification Event. The establishment of modern marine ecosystems took place during a continuous chronology of the successive establishment of organisms and their ecological communities, developed during the ‘Cambrian substrate revolution’, the ‘Ordovician plankton revolution’, the ‘Ordovician substrate revolution’, the ‘Ordovician bioerosion revolution’ and the ‘Devonian nekton revolution’. At smaller scales, different regional but important radiations can be recognized geographically and some of them have been identified and named (e.g. those associated with the ‘Richmondian Invasion’ during Late Ordovician time in Laurentia and the contemporaneous ‘Boda event’ in parts of Europe and North Africa), in particular from areas that were in or moved towards lower latitudes, allowing high levels of speciation on epicontintental seas during these intervals. The datasets remain incomplete for many other geographical areas, but also for particular time intervals (e.g. during the late Cambrian ‘Furongian Gap’). The early Palaeozoic biodiversification therefore appears to be a long-term process, modulated by bursts in significant diversity and intervals of inadequate data, where its progressive character will become increasingly clearer with the availability of more complete datasets, with better global coverage and more advanced analytical techniques.

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Section: Discussionmentioning

confidence: 99%

Early Palaeozoic diversifications and extinctions in the marine biosphere: a continuum of change

2019

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“…1.1.B). One of the most recent compilations, based on the Paleobiology Database (PBDB), illustrates the Ordovician genus‐level diversity trend of occurrence data, compiled by Kröger & Lintulaakso (). This diversity curve (Fig.…”

Section: The Great Ordovician Biodiversification Event (Gobe) and Biomentioning

confidence: 99%

“…The Great Ordovician Biodiversification Event illustrated by the genus‐level diversity trend of occurrence data, compiled by Kröger & Lintulaakso (). Three distinct phases of diversifications represent the planktonic, benthic and reef‐building organisms.…”

Section: The Great Ordovician Biodiversification Event (Gobe) and Biomentioning

confidence: 99%

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The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration

Servais

Harper

2018

LET

179

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The Ordovician biodiversification has been recognized since the 1960s; the term ‘The Great Ordovician Biodiversification Event’, abbreviated by many as the ‘GOBE’, has been used for the past 20 years. The conceptual development and terminology applied to this crucial episode in marine life signify its considerable complexity. The GOBE includes successive biodiversity phases of the pelagic and benthic biotas, possibly decoupled. Put simply, the GOBE can be seen as a sequence of diversifications of the planktonic (late Cambrian–Early Ordovician), level‐bottom benthic (Early–Middle Ordovician) and reef communities (Middle–Late Ordovician), although the boundaries of these ‘events’ are diachronous (as for the entire GOBE), and it is logical to assume that these communities co‐evolved and interacted. The GOBE also includes several Biotic Immigration Events (BIMEs), such as the ‘Richmondian Invasion’ and the ‘Boda Event’, recording the large‐scale dispersal of taxa from one biogeographical area to another. The GOBE is thus the sum of the diversity trends of all individual fossil groups showing rapid increases, diachronously, during different intervals and across different regions. It thus spans the entire Ordovician, capturing the increasing total diversity of marine organisms during the period. The GOBE is not simply one, but many sequential events.

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“…At the same time the late Sandbian locally and globally marks the early climax of the Great Ordovician Biodiversification Event (GOBE, e.g. Hints et al 2010;Servais et al 2010;Kröger & Lintulaakso 2017, and references therein).…”

Section: Introductionmentioning

confidence: 99%

The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity

Kröger

Aubrechtová

2019

Journal of Systematic Palaeontology

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The cephalopods collected from the mud-mounds of the Kullsberg Limestone Formation, late Sandbian-earliest Katian(?), south central Sweden, are highly diverse and comprise 26 identifiable species of 12 families and six orders in a sample of c. 180 specimens. The assemblage is strongly dominated by orthocerids in abundance and diversity. In contrast, the time equivalent assemblage of the reef limestone of the Vasalemma Formation of Estonia is dominated by actinocerids and less diverse. Only one third of the species co-occur in the two palaeogeographically relatively close assemblages, respectively. The taxonomic composition of the Kullsberg assemblage is on the order level more similar to that of the late Katian-early Hirnantian Boda Limestone Formation of south central Sweden, which represents a similar relatively deep depositional environment. The high local differentiation of cephalopod reef faunas exemplifies the importance of the emergent Baltic reef habitats in the diversification processes during early Late Ordovician. Of the described taxa, the following are new:

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RNames, a stratigraphical database designed for the statistical analysis of fossil occurrences – the Ordovician diversification as a case study

Cited by 12 publications

References 23 publications

Early Palaeozoic diversifications and extinctions in the marine biosphere: a continuum of change

Early Palaeozoic diversifications and extinctions in the marine biosphere: a continuum of change

The Great Ordovician Biodiversification Event (GOBE): definition, concept and duration

The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity

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