Precarious ephemeral refugia during the earliest Triassic

doi:10.1130/G38793.1

	Precarious ephemeral refugia during the earliest Triassic
	Amanda Godbold; Shane Schoepfer; Shuzhong Shen (沈树忠); Charles M. Henderson
	2017
发表期刊	Geology
ISSN	0091-7613
卷号	45 期号:7 页码:607-610
摘要	The term refuge describes, in both ecology and paleoecology, an ecosystem that acts as a sanctuary during times of environmental stress. This study tests the concept by examining the fate of a single community that lived similar to 50 k.y. after the end-Permian mass extinction (EPME). An assemblage of trace fossils, bivalves, and echinoids, living on a microbial mat in a slope environment, is preserved on a single bedding plane in the Shangsi section, south China. The microbial community was vital to the success of the refuge, acting as a stable substrate, food source, and oxygen supply. Shallow-water microbial communities have been interpreted as refugia, but this deeper site may have been critical to organisms with temperature sensitivities. Published paleotemperature calculations suggest sublethal surface temperatures of 34 degrees C at Shangsi. A species of cidaroid echinoid likely migrated to cooler deep waters to optimize development, suggesting that the success of this shallow-water clade is attributable to such refugia, when survival was most precarious after the EPME. The ecosystem was short lived, depending on low productivity and slow sedimentation. When conditions became suboptimal due to ash input and increasing productivity, the ecosystem quickly collapsed, allowing for colonization by opportunistic taxa including Claraia and microconchids. Elsewhere the ecosystem may have remained unchanged. Earliest Triassic refugia may have been restricted to these ephemeral environmental settings until organisms adapted to continuing harsh conditions.
DOI	10.1130/G38793.1
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000404104300012
出版者	GEOLOGICAL SOC AMER, INC
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/13131
专题	中国科学院南京地质古生物研究所其他
通讯作者	Amanda Godbold
推荐引用方式 GB/T 7714	Amanda Godbold,Shane Schoepfer,Shuzhong Shen ,et al. Precarious ephemeral refugia during the earliest Triassic[J]. Geology,2017,45(7):607-610.
APA	Amanda Godbold,Shane Schoepfer,Shuzhong Shen ,&Charles M. Henderson.(2017).Precarious ephemeral refugia during the earliest Triassic.Geology,45(7),607-610.
MLA	Amanda Godbold,et al."Precarious ephemeral refugia during the earliest Triassic".Geology 45.7(2017):607-610.