气候变化领域集成服务门户(CCPortal): Permian–Triassic non-marine algae of Gondwana—Distributions, natural affinities and ecological implications

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DOI	10.1016/j.earscirev.2020.103382
	Permian–Triassic non-marine algae of Gondwana—Distributions, natural affinities and ecological implications
	Mays C.; Vajda V.; McLoughlin S.
发表日期	2021
ISSN	0012-8506
卷号	212
英文摘要	The abundance, diversity and extinction of non-marine algae are controlled by changes in the physical and chemical environment and community structure of continental ecosystems. We review a range of non-marine algae commonly found within the Permian and Triassic strata of Gondwana and highlight and discuss the non-marine algal abundance anomalies recorded in the immediate aftermath of the end-Permian extinction interval (EPE; 252 Ma). We further review and contrast the marine and continental algal records of the global biotic crises within the Permian–Triassic interval. Specifically, we provide a case study of 17 species (in 13 genera) from the succession spanning the EPE in the Sydney Basin, eastern Australia. The affinities and ecological implications of these fossil-genera are summarised, and their global Permian–Triassic palaeogeographic and stratigraphic distributions are collated. Most of these fossil taxa have close extant algal relatives that are most common in freshwater, brackish or terrestrial conditions, and all have recognizable affinities to groups known to produce chemically stable biopolymers that favour their preservation over long geological intervals. However, these compounds (e.g., sporopollenin and algaenan) are not universal, so the fossil record is sparse for most algal groups, which hinders our understanding of their evolutionary histories. Owing partly to the high preservational potential of Zygnematophyceae, a clade of freshwater charophyte algae and sister group to land plants, this group has a particularly diverse and abundant Permian–Triassic fossil record in Gondwana. Finally, we review and contrast the marine and continental algal records of the global biotic crises within the Permian–Triassic interval. In continental settings, Permian algal assemblages were broadly uniform across most of southern and eastern Gondwana until the EPE; here, we propose the Peltacystia Microalgal Province to collectively describe these distinct and prolonged freshwater algal assemblages. In the immediate aftermath of the EPE, relative increases in non-marine algae have been consistently recorded, but the distributions of prominent taxa of Permian freshwater algae became severely contracted across Gondwana by the Early Triassic. We highlight the paucity of quantitative, high-resolution fossil evidence for this key group of primary producers during all biotic crises of the Permian and Triassic periods. This review provides a solid platform for further work interpreting abundance and diversity changes in non-marine algae across this pivotal interval in evolutionary history. © 2020 The Authors
英文关键词	algae; freshwater ecology; Gondwana; mass extinctions; palaeobiogeography; Permian–Triassic
语种	英语
scopus关键词	abundance; alga; biostratigraphy; fossil record; freshwater ecosystem; Gondwana; mass extinction; paleobiogeography; Permian-Triassic boundary; Embryophyta; Zygnemophyceae
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209435
作者单位	Swedish Museum of Natural History, Box 50007, Stockholm, SE-104 05, Sweden; Monash University, School of Earth, Atmosphere and Environment, 9 Rainforest Walk, Clayton, VIC 3800, Australia
推荐引用方式 GB/T 7714	Mays C.,Vajda V.,McLoughlin S.. Permian–Triassic non-marine algae of Gondwana—Distributions, natural affinities and ecological implications[J],2021,212.
APA	Mays C.,Vajda V.,&McLoughlin S..(2021).Permian–Triassic non-marine algae of Gondwana—Distributions, natural affinities and ecological implications.EARTH-SCIENCE REVIEWS,212.
MLA	Mays C.,et al."Permian–Triassic non-marine algae of Gondwana—Distributions, natural affinities and ecological implications".EARTH-SCIENCE REVIEWS 212(2021).