Biodiversity of Early-Middle Ordovician acritarchs and sea level changes in South China

Yan, Kui; Li, Jun

doi:10.1007/bf03183748

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…The utilization of a consistent stratigraphic framework across various studies facilitates comparisons of the paleontology of the Yangtze region. By examining the sea-level curves in this study and comparing them with the diversity curves derived from studies on chitinous species, acritarchs, and brachiopods based on the same graptolite zones, the synergistic evolution between sea-level changes and biogenic radiation can be explored [25,28,35].…”

Section: Impact Of Sea-level Change On the Great Ordovician Biodivers...mentioning

confidence: 99%

“…By shedding new light on [62], Baltoscandia [29], Australia [61], and North America [24]. The green curves represent biodiversity curves for chitinozoans [25], acritarchs [28], and brachiopods [35], respectively, within the Early and Middle Ordovician Meitan Formation. The figure is rescaled based on graptolite biozones for enhanced representation of geological time.…”

Section: Impact Of Sea-level Change On the Great Ordovician Biodivers...mentioning

confidence: 99%

“…In addition, considerable attention has been devoted to the investigation of the relationship between global sea-level changes and this biological radiation event [24][25][26]. The rise and fall of the global sea level have a profound influence not only on the physical properties of the ocean (such as water depth, light transmittance, seawater circulation, geological properties of the ocean water), but also on the chemical and biological properties of the ocean (such as nutrient content, oxygen content, and primary productivity) [27,28]. Detailed studies of sea-level changes may hold immense potential for revealing biodiversity patterns, adaptive radiation dynamics, and their influencing factors [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Microfacies Analysis of Mixed Siliciclastic-Carbonate Deposits in the Early-Middle Ordovician Meitan Formation in the Upper Yangtze Platform in SW China: Implications for Sea-Level Changes during the GOBE

Wang,

Lin,

Tian

et al. 2023

Minerals

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During the Early-Middle Ordovician, the Upper Yangtze Platform experienced extensive development of a distinctive set of mixed siliciclastic-carbonate deposits known as the Meitan Formation. To conduct a comprehensive study of the relationship between mixed sedimentation and sea-level changes, the Hailong section, situated at the southwest margin of the Upper Yangtze Platform in SW China, was selected as the study area due to its typical mixed sedimentary sequence. This section was effectively compared with sections in other regions. Clustering analysis of the point-count groups from the Honghuayuan and Meitan Formations revealed nine microfacies that developed during this period. Such a diverse range of microfacies provides the evidence of frequent sea-level changes in the Yangtze Platform throughout this period. Specifically, two sea-level rises were identified during the early TS.2b and early TS.3b, with the early TS.2b event occurring globally. Furthermore, four sea-level falls were observed in the late TS.2b, TS.2c, TS.3a, and late TS.3b periods. The late TS.2b sea-level fall was globally significant. From TS.2c onwards, distinct variations in sea-level changes among the Yangtze Platform, North China, Baltoscandia, Australia, and North America emerged due to alterations in the paleogeographic pattern. By comparing the sea-level curves in the Upper Yangtze Platform with the diversity curves of chitinozoans, acritarchs, and brachiopods, it became evident that environmental changes played a crucial role in the Great Ordovician Biodiversification Event (GOBE), especially during the Floian. The rising sea level and increased detrital materials fostered the development of diverse habitats, prompting organisms to adapt to varying environments. In general, rising sea levels favored increased brachiopod diversity, while falling sea levels favored enhanced planktonic diversity among chitinous and acritarch species. By shedding new light on the relationship between Ordovician sea-level changes and biodiversification in the Yangtze region, this study offers a fresh perspective on the subject from the microfacies analysis.

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Section: Impact Of Sea-level Change On the Great Ordovician Biodivers...mentioning

confidence: 99%

Section: Impact Of Sea-level Change On the Great Ordovician Biodivers...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microfacies Analysis of Mixed Siliciclastic-Carbonate Deposits in the Early-Middle Ordovician Meitan Formation in the Upper Yangtze Platform in SW China: Implications for Sea-Level Changes during the GOBE

Wang,

Lin,

Tian

et al. 2023

Minerals

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“…Jellyfish is one of the important aquatic products in our nation. Desalted jellyfish is loved by people for its brittle, nutritious and delicious to consumption [1] . But due to high water content in jellyfish and easy to decompose and autolysis, there will add a lot of salt and alum in the process of jellyfish to achieve the purpose of dehydration and improve product quality [2,3] .…”

Section: Introductionmentioning

confidence: 99%

Research on Detecting Aluminum in Jellyfish by Flame Atomic Absorption Method

Yang

Cen

et al. 2014

AMR

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The flame atomic absorption method was applied to determine aluminum in jellyfish. The optimum detecting conditions were determined through many experiments. It established a nitric oxide-acetylene flame atomic absorption method to detect aluminum content in jellyfish that a good linear relationship is obtained in concentration range and correlation coefficient r2=0.9996. There are no significant differences in results after jellyfish samples were digested by three pretreatment methods. The detection limit of this method is 3.5 mg/L, the relative standard deviations are less than 5%, and the recovery is in the range of 88.50~104.20%. The test shows that: both the precision and accuracy accord with the demands, so this instrument analytical method could apply to research on quantitative detection of aluminum in jellyfish.

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“…Due to the transport particularity, related researches home and abroad are mainly concentrated on routes optimization, risk assessment and emergency management [1] . While the studies of enterprises safety evaluation are comparatively few, and the representative literatures are as follows.…”

Section: Introductionmentioning

confidence: 99%

Research on Safety Evaluation Indexes of the Road Transportation Enterprise of Dangerous Goods

Dong

Qian

et al. 2013

AMM

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By using the accident causing theory and system safety engineering theory, factors structure affecting the enterprise production safety was obtained. Comprehensively considering enterprise qualification management, transportation organization, employees and accidents, a multi-level safety evaluation index system is built, according to the relevant regulations and current situations of the road transportation enterprise of dangerous goods.

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Biodiversity of Early-Middle Ordovician acritarchs and sea level changes in South China

Cited by 8 publications

References 14 publications

Microfacies Analysis of Mixed Siliciclastic-Carbonate Deposits in the Early-Middle Ordovician Meitan Formation in the Upper Yangtze Platform in SW China: Implications for Sea-Level Changes during the GOBE

Microfacies Analysis of Mixed Siliciclastic-Carbonate Deposits in the Early-Middle Ordovician Meitan Formation in the Upper Yangtze Platform in SW China: Implications for Sea-Level Changes during the GOBE

Research on Detecting Aluminum in Jellyfish by Flame Atomic Absorption Method

Research on Safety Evaluation Indexes of the Road Transportation Enterprise of Dangerous Goods

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