Late Silurian brachiopods Dayia and Shaleria as indicators of environmental changes during the 'Lau/Kozlowskii Bioevent' on both sides of the Rheic Ocean

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F25%3A106463" target="_blank" >RIV/60460709:41330/25:106463 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/25:10169934

Výsledek na webu

<a href="http://www.geology.cz/bulletin/contents/art1952" target="_blank" >http://www.geology.cz/bulletin/contents/art1952</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3140/bull.geosci.1952" target="_blank" >10.3140/bull.geosci.1952</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Late Silurian brachiopods Dayia and Shaleria as indicators of environmental changes during the 'Lau/Kozlowskii Bioevent' on both sides of the Rheic Ocean

Popis výsledku v původním jazyce

A comparison of high-resolution stratigraphic records of Ludfordian global environmental changes with the stratigraphic distributions of brachiopods belonging to the genera Dayia and Shaleria are used to explain changes in benthic associations on the opposite sides of the Rheic Ocean. To elucidate these changes, we analysed data from several localities from Gotland (Laurussia) and the Prague Basin (peri-Gondwana). The current analysis revealed that Ludfordian Dayia navicula from the tropical region of Laurussia and Dayia minor from the temperate region of Gondwana represent two closely related but distinct species. Available data suggest that the Dayia navicula Association originated in the Avalonian part of Laurussia. After the decline of the Dayia navicula Association in the Anglo-Welsh Basin, the same association continued in the Baltic Basin of Laurussia. The initial environmental changes associated with the Siluricus Ocean Anoxic Event, which caused the Lau/Kozlowskii extinction events and preceded the Mid-Ludfordian Glaciation, triggered the migration of Dayia species over the Rheic Ocean. At the same time, this genus appeared in the Prague Basin, located in the periphery of Gondwana. The same migration way is also recorded for brachiopod genera Shaleria and Navispira. The subsequent environmental changes associated with the Mid-Ludfordian Glaciation, such as shallowing and cooling, had a negative impact on Dayia populations, but favoured the expansion of Shaleria populations. This replacement trend in benthic communities occurred on the opposite sides of the Rheic Ocean, on the Gotland and in the Prague Basin. Shaleria populations culminated during the late rising phase of the mid-Ludfordian carbon isotope excursion (MLCIE) and persisted through its steady phase, but then began to decline. Our results reveal that the occurrence and succession of brachiopod associations, as well as the biotic reaction of benthic invertebrates to global environmental changes on both sides of the Rheic Ocean, were similar and roughly synchronous. In the taxonomic section of the present paper, a minute species, Dayia minuscula sp. nov., restricted to the deglaciation period following the Mid-Ludfordian Glaciation, is described from the Prague Basin.

Název v anglickém jazyce

Late Silurian brachiopods Dayia and Shaleria as indicators of environmental changes during the 'Lau/Kozlowskii Bioevent' on both sides of the Rheic Ocean

Popis výsledku anglicky

A comparison of high-resolution stratigraphic records of Ludfordian global environmental changes with the stratigraphic distributions of brachiopods belonging to the genera Dayia and Shaleria are used to explain changes in benthic associations on the opposite sides of the Rheic Ocean. To elucidate these changes, we analysed data from several localities from Gotland (Laurussia) and the Prague Basin (peri-Gondwana). The current analysis revealed that Ludfordian Dayia navicula from the tropical region of Laurussia and Dayia minor from the temperate region of Gondwana represent two closely related but distinct species. Available data suggest that the Dayia navicula Association originated in the Avalonian part of Laurussia. After the decline of the Dayia navicula Association in the Anglo-Welsh Basin, the same association continued in the Baltic Basin of Laurussia. The initial environmental changes associated with the Siluricus Ocean Anoxic Event, which caused the Lau/Kozlowskii extinction events and preceded the Mid-Ludfordian Glaciation, triggered the migration of Dayia species over the Rheic Ocean. At the same time, this genus appeared in the Prague Basin, located in the periphery of Gondwana. The same migration way is also recorded for brachiopod genera Shaleria and Navispira. The subsequent environmental changes associated with the Mid-Ludfordian Glaciation, such as shallowing and cooling, had a negative impact on Dayia populations, but favoured the expansion of Shaleria populations. This replacement trend in benthic communities occurred on the opposite sides of the Rheic Ocean, on the Gotland and in the Prague Basin. Shaleria populations culminated during the late rising phase of the mid-Ludfordian carbon isotope excursion (MLCIE) and persisted through its steady phase, but then began to decline. Our results reveal that the occurrence and succession of brachiopod associations, as well as the biotic reaction of benthic invertebrates to global environmental changes on both sides of the Rheic Ocean, were similar and roughly synchronous. In the taxonomic section of the present paper, a minute species, Dayia minuscula sp. nov., restricted to the deglaciation period following the Mid-Ludfordian Glaciation, is described from the Prague Basin.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

<a href="/cs/project/GA23-06198S" target="_blank" >GA23-06198S: Reakce středněpaleozoických faunistických společenstev na významné změny prostředí: studie Mulde, Lau a Chotečského eventu v pražské pánvi</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Bulletin of Geosciences (printed version)

ISSN

1214-1119

e-ISSN

1214-1119

Svazek periodika

100

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

54

Strana od-do

685-738

Kód UT WoS článku

001685853600019

EID výsledku v databázi Scopus

2-s2.0-105031704776