气候变化领域集成服务门户(CCPortal): Evolutionary models in the Early Triassic marine realm

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DOI	10.1016/j.palaeo.2017.12.016
	Evolutionary models in the Early Triassic marine realm
	Pietsch C.; Ritterbush K.A.; Thompson J.R.; Petsios E.; Bottjer D.J.
发表日期	2019
ISSN	0031-0182
起始页码	65
结束页码	85
卷号	513
英文摘要	The relative influences of extrinsic compared to intrinsic drivers of evolutionary change have long been theorized and debated in the fossil record. Ecological recoveries from mass extinction events present records in which to examine these contrasts. Competition in a low diversity world, reproductive strategy, reconstruction of trophic systems and ecological specialization represent possible intrinsic controls on diversification. Feedback between diversity and abundance shifts of marine organisms with biogeochemical cycling and environmental conditions act as extrinsic controls on recovery process and rate. Disentangling these evolutionary pressures is a major challenge for understanding evolutionary recovery from mass extinction. The end-Permian mass extinction (251.88 Ma) represents the largest mass extinction in Earth history and led to an extended recovery interval which lasted the duration of the Early Triassic (~ 4.8 Myr) and beyond. Recent analyses suggest that the survivors of the mass extinction were biased toward organisms with higher metabolic rates that were more resilient against the volatile environmental changes that pervaded the Early Triassic including extreme temperature events, low pH, and low oxygen conditions. We use the Early Triassic recovery of gastropods, echinoids, and ammonoids to examine the processes of taxonomic and ecological evolution in response to, or in spite of, extrinsic environmental perturbations. The case studies of benthic gastropods and echinoids, when compared to pelagic ammonoids reflect similarities and differences in recovery following the end-Permian mass extinction. Gastropods and echinoids exhibit evidence of strong extrinsic environmental limitations which implicate the availability of refugia as a control on recovery. Low initial taxonomic diversity of survivors may have also limited the evolutionary recovery of both clades. Abundant and diverse microgastropod assemblages are interpreted as an adaptation to extreme environmental conditions. The morphological diversity of disarticulated echinoid spines and plates described in the southwestern United States, and examination of phylogenetic ghost lineages hints at a significant “hidden diversity” of Early Triassic echinoids. Ammonoids experienced taxonomic resets but are shown to be resilient to repeated environmental perturbations in the Boreal Ocean over the duration of the Early Triassic. Ammonoids may have adapted to persistent latitudinal temperature gradients and oxygen minimum zones that developed in the Early Triassic ocean basins. © 2018 Elsevier B.V.
英文关键词	Ammonoid; Echinoid; Extrinsic; Gastropod; Intrinsic; Refugia
语种	英语
scopus关键词	abundance; echinoderm; environmental change; extreme event; fossil record; gastropod; marine environment; mass extinction; mollusc; Permian; refuge; species diversity; Triassic; United States; Ammonoidea; Echinoida; Gastropoda
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/151208
作者单位	Geology Department, San Jose State University, San Jose, CA 95192, United States; Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112-0102, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, United States; Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, United States
推荐引用方式 GB/T 7714	Pietsch C.,Ritterbush K.A.,Thompson J.R.,et al. Evolutionary models in the Early Triassic marine realm[J],2019,513.
APA	Pietsch C.,Ritterbush K.A.,Thompson J.R.,Petsios E.,&Bottjer D.J..(2019).Evolutionary models in the Early Triassic marine realm.Palaeogeography, Palaeoclimatology, Palaeoecology,513.
MLA	Pietsch C.,et al."Evolutionary models in the Early Triassic marine realm".Palaeogeography, Palaeoclimatology, Palaeoecology 513(2019).