气候变化领域集成服务门户(CCPortal): Coordinated biotic and abiotic change during the Great Ordovician Biodiversification Event: Darriwilian assembly of early Paleozoic building blocks

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DOI	10.1016/j.palaeo.2019.05.034
	Coordinated biotic and abiotic change during the Great Ordovician Biodiversification Event: Darriwilian assembly of early Paleozoic building blocks
	Stigall A.L.; Edwards C.T.; Freeman R.L.; Rasmussen C.M.Ø.
发表日期	2019
ISSN	0031-0182
起始页码	249
结束页码	270
卷号	530
英文摘要	The Ordovician Period records an extraordinary biodiversity increase known as the Great Ordovician Biodiversification Event (GOBE), which coincided with a series of environmental changes to the Earth System, notably a cooling global ocean, increased oxygenation, and increased nutrient supply from volcanism and continental weathering. The co-evolution of Earth and its biota during this interval has been studied in various contexts on multiple paleocontinents. Emerging patterns depend on the lens of investigation. Here we summarize the current state of understanding by reviewing and synthesizing the fossil and sedimentary records. Recent paleontological studies, mainly focused on rhynchonelliform (articulated) brachiopods, bryozoa, cephalopods, trilobites, graptolites, echinoderms, and reef organisms, have documented details of diversification, body size increase, development of ecosystem complexity, and intensification of inter-continental dispersal from the late Cambrian through Late Ordovician. Biomass increased markedly between the Early and Middle Ordovician. Furthermore, diversification rates increase statistically during the mid-Darriwilian Age both globally and regionally. Coincident with these biotic changes, geochemical proxies record significant changes to Earth's physical system. Oceanic temperatures decreased, and atmospheric oxygen levels increased to near modern levels in concert with the Middle Ordovician diversification of shelly fauna. Anoxic pulses ceased and evidence for deep ocean ventilation prevails in Middle Ordovician strata. Furthermore, a major Middle–Late Ordovician change in oceanic strontium isotopic composition indicates increased weathering of juvenile volcanic rocks and delivery of nutrients to marine settings. This multi-proxy dataset records near-simultaneous changes in fossil-rich shallow marine environments during exactly the interval of greatest diversification. By integrating biotic and geochemical datasets, a clear picture of the co-evolution of Earth and its biota emerges indicating that the Darriwilian was the critical interval facilitating increased capacity of ecosystems. We, therefore, recommend restricting the term “GOBE” to indicate this short interval of rapid diversification and ecosystem change, and using “Ordovician Radiation” when referencing the sum of diversifications that occurred throughout the Ordovician Period. © 2019 Elsevier B.V.
英文关键词	Chemostratigraphy; Diversity; Global change; Middle Ordovician; Ordovician Radiation
语种	英语
scopus关键词	biodiversity; body size; chemostratigraphy; dispersal; environmental change; environmental factor; fossil record; global change; invertebrate; marine environment; Ordovician; paleoenvironment; paleontology; Paleozoic; species diversity; volcanic rock; volcanism; weathering profile; Brachiopoda; Bryozoa; Cephalopoda; Echinodermata; Trilobitomorpha
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/150899
作者单位	Department of Geological Sciences and OHIO Center for Ecology and Evolutionary Studies, Ohio University, 316 Clippinger Laboratories, Athens, OH 45701, United States; Department of Geological and Environmental Sciences, Appalachian State University, Boone, NC 28608, United States; Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, United States; Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5–7, Copenhagen, DK-1350, Denmark
推荐引用方式 GB/T 7714	Stigall A.L.,Edwards C.T.,Freeman R.L.,et al. Coordinated biotic and abiotic change during the Great Ordovician Biodiversification Event: Darriwilian assembly of early Paleozoic building blocks[J],2019,530.
APA	Stigall A.L.,Edwards C.T.,Freeman R.L.,&Rasmussen C.M.Ø..(2019).Coordinated biotic and abiotic change during the Great Ordovician Biodiversification Event: Darriwilian assembly of early Paleozoic building blocks.Palaeogeography, Palaeoclimatology, Palaeoecology,530.
MLA	Stigall A.L.,et al."Coordinated biotic and abiotic change during the Great Ordovician Biodiversification Event: Darriwilian assembly of early Paleozoic building blocks".Palaeogeography, Palaeoclimatology, Palaeoecology 530(2019).