Reply to “Comment: Taxonomic diversity structure of Silurian crinoids: Stability versus dynamism” by S.K. Donovan

Ruban, Dmitry A.

doi:10.1016/j.annpal.2012.10.001

Cited by 2 publications

(3 citation statements)

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“…Undoubtedly, the knowledge of the stratigraphic distribution of both bivalves and gastropods has changed during the past decade (see, e.g., Heildelberger, 2001). Such a kind of incompleteness of data is, however, inevitable, because of common time lag between palaeobiological analyses and the collection of the original data (Ruban, 2012 Fig. 1.…”

Section: Diversity Dynamicsmentioning

confidence: 99%

“…the maximum possible uncertainty linked to the incompleteness when the chosen palaeontological data are interpreted (e.g., Ruban, 2011aRuban, , 2012. The documented occurrence of a genus in a given time unit is established as 1.00, whereas its absence (before origination or after extinction) is established as 0.00.…”

Section: Diversity Dynamicsmentioning

confidence: 99%

“…They result from a combination of various mechanisms (tectonic, palaeoclimatic, sedimentary, etc.) operating at both global and regional scales (e.g., Catuneanu, 2006;Veeken, 2006;Moucha et al, 2008;Conrad & Husson, 2009;Lovell, 2010;Ruban et al, 2012). It cannot be excluded that some large regions with conditions favourable for diversification of marine invertebrates did not undergo submergence despite the global sea-level rise because of large-scale tectonic uplift (e.g., linked to the mechanisms of dynamic topography), and vice versa.…”

Section: General Considerationsmentioning

confidence: 99%

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The late Silurian–Middle Devonian long-term eustatic cycle as a possible control on the global generic diversity dynamics of bivalves and gastropods

Ruban¹

2013

Geologos

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A long-term eustatic cycle (fall and subsequent rise of the global sea level) embraced the late Silurian-Middle Devonian time interval. Potentially, these sea-level changes could drive global biodiversity. The stratigraphic ranges of 204 bivalve genera and 279 gastropod genera included into the famous Sepkoski database allow reconstructing changes in the total diversity and the number of originations and extinctions of these important groups of marine benthic macro- -invertebrates during this interval. None of the recorded parameters coincided with the long-term global sea-level cycle. It cannot be not excluded, however, that the global sea-level changes did not affect the regions favourable for bivalve and gastropod radiation because of regional tectonic mechanisms; neither can it be excluded that the eustatic control persisted together with many other extrinsic and intrinsic controls. Interestingly, the generic diversity of gastropods increased together with a cooling trend, and vice versa. Additionally, the Ludlow, Eifelian, and Givetian biotic crises affected, probably, both fossil groups under study. There was also a coincidence of the relatively high bivalve generic diversity, initial radiation of gastropods and the entire biota, and the diversification of brachiopods with the Early Devonian global sea-level lowstand, and this may be interpreted as evidence of a certain eustatic control on the marine biodiversity.

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Section: Diversity Dynamicsmentioning

confidence: 99%

Section: Diversity Dynamicsmentioning

confidence: 99%

Section: General Considerationsmentioning

confidence: 99%

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The late Silurian–Middle Devonian long-term eustatic cycle as a possible control on the global generic diversity dynamics of bivalves and gastropods

Ruban¹

2013

Geologos

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Was there more space in the late Early Devonian for marine biodiversity to peak than in the early Late Ordovician?: A brief note

Ruban

2013

Geol An Balk Poluos

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After the so-called ?Cambrian explosion?, marine biodiversity peaked either in the early Late Ordovician (as shown by the ?classical? curves based on the extensive palaeontological data compilation) or in the late Early Devonian (as shown by the ?innovative? curve based on the sampling standardization). The brief review of the modern plate tectonic, palaeoclimatic, and eustatic reconstructions demonstrates that shelves, which likely provided the main space for biotic radiation, shrank, concentrated in the tropics, and were better connected in the late Early Devonian than in the early Late Ordovician. The results of the present analysis permit to hypothesize that there was more (or the same) space for marine organisms to reach their maximum in their number in the early Late Ordovician relatively to the late Early Devonian. This is the only particular hypothesis, and the other extrinsic and intrinsic factors should be considered in further discussions.

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Reply to “Comment: Taxonomic diversity structure of Silurian crinoids: Stability versus dynamism” by S.K. Donovan

Cited by 2 publications

References 4 publications

The late Silurian–Middle Devonian long-term eustatic cycle as a possible control on the global generic diversity dynamics of bivalves and gastropods

The late Silurian–Middle Devonian long-term eustatic cycle as a possible control on the global generic diversity dynamics of bivalves and gastropods

Was there more space in the late Early Devonian for marine biodiversity to peak than in the early Late Ordovician?: A brief note

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