NDLI: Scleroecology: Implications for ecotypical dwarfism in oxygen-restricted environments (Middle Devonian, Rheinisches Schiefergebirge)

Content Provider	Springer Nature Link
Author	Schöne, Bernd R.
Copyright Year	1999
Abstract	Body sizes of brachiopods and planktonic tentaculites (dacryoconarids) decrease continuously during the Upper Eifelian. This feature is closely related to theotomari Event and the subsequent black shale period, resulting from lowered oxygen levels worldwide in most parts of the marine ecosystem. It is assumed here that low oxygen availability limited physiological processes and, consequently, the biocalcification rate of some species adapted to elevated levels of aeration. Environmentally suppressed specimens are very small (ecotypical dwarfs), though different species react in different ways to changing environmental conditions. Possibilities of deciphering ecological information stored in hardparts of all organisms that cyclically produce skeletal material, are emphasized. This is also true for fossil material.Im Verlauf des späten Eifeliums nimmt die durchschnittliche Körpergröße von z. B. Brachiopoden und planktonischen Tentaculiten (Dacryoconariden) kontinuierlich ab. Das ist offenbar eng mit demotomari-Event und seinen Folgen, also mit weltweit in bestimmten Teilen des marinen Ökosystems reduzierten Sauerstoffgehalten verbunden. Die Verfügbarkeit von Sauerstoff limitiert ganz offensichtlich physiologische Prozesse und damit auch die Biokalzifizierungsrate solcher Arten, die an höhere Sauerstoffgehalte adaptiert sind. Umweltbedingt unterdrückte Individuen sind kleinwüchsig (ökotypischer Zwergwuchs). Verschiedene Arten reagieren selbstverständlich unterschiedlich auf veränderte Umweltbedingungen. Die Hartteile aller Organismen, die zyklisch Hartsubstanzen produzieren, enthalten eine große Menge an ökologischen Informationen, die größtenteils weder zugänglich gemacht wurden noch entschlüsselt werden konnten. Perspektiven ökologischer Rekonstruktionen mittels Analyse skelettaler Substanzen bestehen auch im fossilen Milieu.
Starting Page	35
Ending Page	41
Page Count	7
File Format	PDF
ISSN	00372110
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	79
Issue Number	1
Language	German
Publisher	Springer-Verlag
Publisher Date	1999-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Palaeoecology dwarfism black shales otomari Event Middle Devonian Germany Paleontology Biodiversity Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Paleontology

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Correlations of the Eifelian/Givetian Boundary Beds in the Rheinisches Schiefergebirge

Two isorophid edrioasteroids (Echinodermata) encrusting conulariids from the Hunsrück Slate (Lower Devonian, Emsian; Rheinisches Schiefergebirge) of Germany

Plerophyllina (Anthozoa, Rugosa) in the Middle Devonian of the Eifel area (Rheinisches Schiefergebirge, Germany)

Tryplasma (Anthozoa, Rugosa) in the Middle Devonian of the Eifel area (Rheinisches Schiefergebirge, Germany)

Microhabitat complexity—an example from Middle Devonian bryozoan-rich sediments in the Blankenheim Syncline (northern Eifel, Rheinisches Schiefergebirge)

Lithology and fossil content of some sections in the Siegen beds of the Westerwald hills (Lower Devonian, Rheinisches Schiefergebirge)

Annotations to the Devonian Correlation Table B123di98: Strophomenida, Rheinisches Schiefergebirge

Trilobites of theWocklumeria Stage from the uppermost Upper Devonian of Apricke, Sauerland

Annotations to the Devonian Correlation Table, B 124 di 06: Brachiopod biostratigraphy in the Lower Devonian of the Rheinisches Schiefergebirge (Germany) based on the phylogeny ofArduspirifer (Delthyridoidea, Brachiopoda)

Scleroecology: Implications for ecotypical dwarfism in oxygen-restricted environments (Middle Devonian, Rheinisches Schiefergebirge)

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Plerophyllina (Anthozoa, Rugosa) in the Middle Devonian of the Eifel area (Rheinisches Schiefergebirge, Germany)

Tryplasma (Anthozoa, Rugosa) in the Middle Devonian of the Eifel area (Rheinisches Schiefergebirge, Germany)

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Scleroecology: Implications for ecotypical dwarfism in oxygen-restricted environments (Middle Devonian, Rheinisches Schiefergebirge)