气候变化领域集成服务门户(CCPortal): Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China

CCPortal

DOI	10.1016/j.palaeo.2018.02.027
	Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China
	Song T.; Tong J.; Tian L.; Chu D.; Huang Y.
发表日期	2019
ISSN	0031-0182
起始页码	108
结束页码	123
卷号	519
英文摘要	Immediately after the latest Permian mass extinction, bivalve faunas colonized the Permian-Triassic Transitional Beds (PTTB), especially in littoral clastic facies of South China. The Permian-Triassic (P-Tr) transitional bivalve fauna is composed of holdovers, long-term survivors and newly evolved taxa, and characterized by moderate diversity and high dominance. However, the taxonomy and ecology of this bivalve fauna of littoral clastic facies have not been well understood, especially in comparison with offshore marine records. This paper presents a study on a P-Tr transitional bivalve fauna from five sections of littoral clastic facies in southwestern China, and as such it contributes to a better knowledge of the ecological processes of benthic communities during the P-Tr transition. In total, 20 species in 13 genera of bivalves are identified from the PTTB in the lower part of the Kayitou Formation and the basal part of the Feixianguan Formation of the five sections. Cluster analysis suggests that the transitional bivalve fauna could be further divided into two successive communities (early and late communities), and each is composed of five assemblages. Promyalina–Neoschizodus community (early community) is characterized by presence of holdover taxa, high taxonomic diversity and evenness, and more abundant shallow infaunal suspension feeders. In Pteria community (late community), taxonomic diversity and evenness are much lower, and stationary epifaunal suspension feeders boost at the expense of shallow infaunal suspension feeders compared with the Promyalina–Neoschizodus community. Furthermore, the Promyalina–Neoschizodus community shows a clear spatial variation along environmental gradient from brackish lagoon to shallow marine settings, while the Pteria community is more uniform and homogeneous laterally. The Promyalina–Neoschizodus community in the studied region is of latest Permian age while the Pteria community should belong to the earliest Triassic. Consequently, a significant taxonomical and ecological turnover of bivalve communities occurred between the Promyalina–Neoschizodus community and the Pteria community during the extinction interval in southwestern China. © 2018 Elsevier B.V.
英文关键词	Community turnover; Extinction interval; Post-extinction fauna; Spatial variation; Temporal variation
语种	英语
scopus关键词	bivalve; brackish water; clastic rock; community structure; environmental gradient; lagoon; littoral environment; local extinction; Permian-Triassic boundary; spatial variation; taxonomy; temporal variation; China; Bivalvia; Pteria
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151048
作者单位	State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; School of Geosciences, Yangtze University, Wuhan, 430100, China
推荐引用方式 GB/T 7714	Song T.,Tong J.,Tian L.,et al. Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China[J],2019,519.
APA	Song T.,Tong J.,Tian L.,Chu D.,&Huang Y..(2019).Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China.Palaeogeography, Palaeoclimatology, Palaeoecology,519.
MLA	Song T.,et al."Taxonomic and ecological variations of Permian-Triassic transitional bivalve communities from the littoral clastic facies in southwestern China".Palaeogeography, Palaeoclimatology, Palaeoecology 519(2019).