DOI: 10.1016/j.palaeo.2017.03.025
论文题名: Possible evidence of primary succession in a juvenile-dominated Ediacara fossil surface from the Flinders Ranges, South Australia
作者: Reid L.M. ; García-Bellido D.C. ; Payne J.L. ; Runnegar B. ; Gehling J.G.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 476 起始页码: 68
结束页码: 76
语种: 英语
英文关键词: Community ecology
; Dickinsonia
; Disturbance
; Ediacaran
; Palaeoecology
; Precambrian
英文摘要: Ediacara fossil surfaces from the Flinders Ranges (South Australia) commonly record excellent preservation quality and can provide a palaeoecological window into some of the oldest communities on Earth (ca. 555 Ma). An excavated semi-contiguous sandstone bed of 6.5 m2 from a fossil locality at Crisp Gorge in the central Flinders Ranges records an abundance of taxa and structures characteristic of White Sea assemblage communities. Stratigraphic analysis places the fossil surface within the Oscillation Rippled Sandstone Facies of the Ediacara Member at Crisp Gorge. The community appears to be predominantly juvenile forms, with Dickinsonia costata, Parvancorina minchami and Tribrachidium heraldicum present only within interpreted juvenile size ranges. The textured organic surface contains structures including low relief ridges and round bosses, but overall records a smooth bed surface and is interpreted as representing a surface with only an immature microbial mat developed before burial. No effaced or decayed organisms were identified. Community analysis describes an intermediate Shannon diversity (1.27) and an uneven community dominated by the population of D. costata, which comprises more than 50% of the individuals. The examined parameters, when combined with the presence of small, juvenile taxa and an immature organic mat, suggests that the community inhabiting this surface prior to its catastrophic burial may have been comparable to a modern early-stage, primary successional community. The Crisp Gorge bed emphasizes that Ediacara fossil surfaces from South Australia span a range of developmental stages and offer a window into Ediacaran sea-floor communities at various stages of maturity. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67842
Appears in Collections: 过去全球变化的重建
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作者单位: School of Natural and Built Environments, University of South Australia, Mawson Lakes, South Australia, Australia; South Australian Museum, North Terrace, Adelaide, South Australia, Australia; School of Biological Sciences, University of Adelaide, North Terrace, Adelaide, South Australia, Australia; Department of Earth, Planetary and Space Sciences, University of California, CA, Los Angeles, United States
Recommended Citation:
Reid L.M.,García-Bellido D.C.,Payne J.L.,et al. Possible evidence of primary succession in a juvenile-dominated Ediacara fossil surface from the Flinders Ranges, South Australia[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,476