Secular variations of ichnofossils from the terrestrial Late Permian–Middle Triassic succession at the Shichuanhe section in Shaanxi Province, North China

Guo, Wenwei; Tong, Jinnan; Tian, Li; Chu, Daoliang; Bottjer, David J.; Shu, Wenchao; Ji, Kaixuan

doi:10.1016/j.gloplacha.2019.102978

Cited by 16 publications

(14 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to their propensity to decompose in oxygenated water 24 , 25 , accumulations of cyanobacteria and other microbes were favored by low dissolved oxygen concentrations in the post-EPE floodbasins. This is supported by the scarcity of invertebrate animal trace fossils from this interval of the Sydney Basin 14 and other continental basins 41 , 42 . This also indicates the reduction of aquatic invertebrates through the EPE that would otherwise have prevented the preservation of abundant microbial remains via predation, detritivory, and sediment oxidation.…”

Section: Discussionmentioning

confidence: 90%

Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction

et al. 2021

View full text Add to dashboard Cite

Harmful algal and bacterial blooms linked to deforestation, soil loss and global warming are increasingly frequent in lakes and rivers. We demonstrate that climate changes and deforestation can drive recurrent microbial blooms, inhibiting the recovery of freshwater ecosystems for hundreds of millennia. From the stratigraphic successions of the Sydney Basin, Australia, our fossil, sedimentary and geochemical data reveal bloom events following forest ecosystem collapse during the most severe mass extinction in Earth’s history, the end-Permian event (EPE; c. 252.2 Ma). Microbial communities proliferated in lowland fresh and brackish waterbodies, with algal concentrations typical of modern blooms. These initiated before any trace of post-extinction recovery vegetation but recurred episodically for >100 kyrs. During the following 3 Myrs, algae and bacteria thrived within short-lived, poorly-oxygenated, and likely toxic lakes and rivers. Comparisons to global deep-time records indicate that microbial blooms are persistent freshwater ecological stressors during warming-driven extinction events.

show abstract

Section: Discussionmentioning

confidence: 90%

Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Burrows illustrated by Liu and Li (2013) from Guadalupian or Lopingian strata of China are larger (up to 230 mm wide) than R. australis but have a similar reniform cross-section, shallow excavation angle and sandy infilling within a siltstone host rock. Upper Permian continental strata of the Sunjiagou Formation in South China host inclined burrows around 20 mm in diameter but these lack the surface ornamentation or ventral groove of the Sydney Basin examples (Guo et al 2019). Middle Triassic inclined burrows from both Argentina (up to 270 mm wide) and China (up to 300 mm wide), similarly, are larger than R. australis but share many of the other morphological features outlined above including the median ventral ridge (Krapovickas et al 2013;Yang et al 2018).…”

Section: Comparison With Other Gondwanan Permian-triassic Burrowsmentioning

confidence: 99%

“…In the past two decades the documented diversity of Permian and Triassic burrow forms from these and other regions has expanded greatly (Groenewald et al 2001;Retallack et al 2003;Hasiotis et al 2004;Gastaldo and Rolerson 2008;Sidor et al 2008;Liu and Li 2013;Bordy and Krummeck 2016;Krummeck and Bordy 2018;Yang et al 2018;Guo et al 2019). Moreover, the identity of the excavators has been advanced by the recovery of skeletal remains within some burrow casts and by careful comparison of burrow architecture and morphology with those produced by modern animals (Hasiotis et al , 2004Groenewald et al 2001;Damiani et al 2003;Smith and Botha 2005;Modesto and Botha-Brink 2010;Fernandez et al 2013).…”

Section: Comparison With Other Gondwanan Permian-triassic Burrowsmentioning

confidence: 99%

Dwelling in the Dead Zone—vertebrate Burrows Immediately Succeeding the End-Permian Extinction Event in Australia

McLoughlin

Mays

Vajda

et al. 2020

Palaios

View full text Add to dashboard Cite

A distinctive burrow form, Reniformichnus australis n. isp., is described from strata immediately overlying and transecting the end-Permian extinction (EPE) horizon in the Sydney Basin, eastern Australia. Although a unique excavator cannot be identified, these burrows were probably produced by small cynodonts based on comparisons with burrows elsewhere that contain body fossils of the tracemakers. The primary host strata are devoid of plant remains apart from wood and charcoal fragments, sparse fungal spores, and rare invertebrate traces indicative of a very simplified terrestrial ecosystem characterizing a ‘dead zone' in the aftermath of the EPE. The high-paleolatitude (∼ 65–75°S) setting of the Sydney Basin, together with its higher paleoprecipitation levels and less favorable preservational potential, is reflected by a lower diversity of vertebrate fossil burrows and body fossils compared with coeval continental interior deposits of the mid-paleolatitude Karoo Basin, South Africa. Nevertheless, these burrows reveal the survivorship of small tetrapods in considerable numbers in the Sydney Basin immediately following the EPE. A fossorial lifestyle appears to have provided a selective advantage for tetrapods enduring the harsh environmental conditions that arose during the EPE. Moreover, high-paleolatitude and maritime settings may have provided important refugia for terrestrial vertebrates at a time of lethal temperatures at low-latitudes and aridification of continental interiors.

show abstract

“…Only several escape traces are recorded in this study while a few ichnofossils, for example limulid trackways (Shu et al ., 2018) and Skolithos linearis , S . verticalis and Palaeophycus (Guo et al ., 2019), are reported from the Liujiagou Formation. Limulids are able to survive in a much broader range of conditions, including high temperatures, than most lacustrine taxa, although experimental work has shown that even they perish at temperatures >35˚C (Ehlinger & Tankersley, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Within this debated depositional context, this paper reports the presence of unusual, near‐surface concretion growth and intraformational conglomerate formation. The succeeding Heshanggou Formation consists of red mudstones and subordinate sandstones ascribed to fluvial, floodplain and lacustrine origins (Guo et al ., 2019; Zhu et al ., 2020).…”

Section: Regional Geologymentioning

confidence: 99%

Unusual intraclast conglomerates in a stormy, hot‐house lake: The Early Triassic North China Basin

Wignall

Peakall

et al. 2021

Sedimentology

Self Cite

View full text Add to dashboard Cite

Early Triassic temperatures were some of the hottest of the Phanerozoic, seasurface temperatures approached 40°C, with profound consequences for both the sedimentology and faunal distributions in the oceans. However, the impact of these temperatures in terrestrial settings is unclear. This study examines shallow lacustrine sediments from the Lower Triassic succession of North China. These consist of diverse fluvial to shallow lacustrine sandstones and also spectacular, coarse conglomerates composed of diverse, intraformational clasts reworked from the interbedded sediments. The conglomerate beds can show inverse grading and high angle, flat-pebble imbrication in their lower part and vertically orientated flat pebbles in their upper part. The cobbles include cemented and reworked conglomerate intraclasts and sandstone concentrically-laminated concretions that record multi-step histories of growth and reworking, pointing to rapid cementation of the sandy lake bed (likely facilitated by high temperatures). The conglomerates record frequent, high-energy events that were capable of brecciating a lithified lake bed and transporting cobbles in wave-influenced sediment-gravity flows. Initially, powerful oscillatory flows brecciated and deflated the lake bed and subsequently helped to sustain turbulence during short-distance lateral flow. It is possible that hurricanes, originating from the adjacent hyperwarm, Palaeo-Tethyan Ocean travelled into the major lakes of the North China continent during the Early Triassic.

show abstract

Secular variations of ichnofossils from the terrestrial Late Permian–Middle Triassic succession at the Shichuanhe section in Shaanxi Province, North China

Cited by 16 publications

References 60 publications

Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction

Lethal microbial blooms delayed freshwater ecosystem recovery following the end-Permian extinction

Dwelling in the Dead Zone—vertebrate Burrows Immediately Succeeding the End-Permian Extinction Event in Australia

Unusual intraclast conglomerates in a stormy, hot‐house lake: The Early Triassic North China Basin

Contact Info

Product

Resources

About