DOI: 10.1038/ngeo2537
论文题名: Protracted development of bioturbation through the early Palaeozoic Era
作者: Tarhan L.G. ; Droser M.L. ; Planavsky N.J. ; Johnston D.T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 11 起始页码: 865
结束页码: 869
语种: 英语
Scopus关键词: biogeochemical cycle
; bioturbation
; burrowing organism
; colonization
; developmental biology
; marine sediment
; Paleozoic
; Precambrian
; Animalia
英文摘要: Bioturbation, the physical and chemical mixing of sediment by burrowing animals, exerts an important control on the character of modern marine sediments and biogeochemical cycling. Here we show that the mixing of sediments on marine shelves remained limited until at least the late Silurian, 120 million years after the Precambrian-Cambrian transition. We present ichnological, stratigraphic and taphonomic data from a range of lower Phanerozoic siliciclastic successions spanning four palaeocontinents. The protracted development of the sediment mixed layer is also consistent with sulphur data and global sulphur model simulations. The slow increase in the intensity of bioturbation in the sediment record suggests that evolutionary advances in sediment colonization outpaced advances in sediment mixing. We conclude that ecosystem restructuring caused by the onset of significant infaunal mobile deposit feeding ("bulldozinga") occurred well after both the Cambrian Explosion and the Great Ordovician Biodiversification Event. © 2015 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106138
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Geology and Geophysics, Yale University, 210 Whitney Ave, New Haven, CT, United States; Department of Earth Sciences, University of California-Riverside, 900 University Ave, Riverside, CA, United States; Department of Earth and Planetary Sciences, Harvard University, 20 Oxford St., Cambridge, MA, United States
Recommended Citation:
Tarhan L.G.,Droser M.L.,Planavsky N.J.,et al. Protracted development of bioturbation through the early Palaeozoic Era[J]. Nature Geoscience,2015-01-01,8(11)