DOI: 10.1016/j.palaeo.2016.03.009
论文题名: Paleoecology of Miocene crocodylians in Florida: Insights from stable isotope analysis
作者: Whiting E.T. ; Steadman D.W. ; Krigbaum J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 451 起始页码: 23
结束页码: 34
语种: 英语
英文关键词: Alligator
; Florida
; Fossils
; Isotopes
; Miocene
; Tomistomines
英文摘要: Fossils from late Miocene localities in north Florida offer new information about the paleoecological relationships between sympatric alligatorine and tomistomine crocodylians. Large, robust tomistomines (traditionally referred to Gavialosuchus americanus) outnumber Alligator fossils at localities representing coastal/estuarine depositional environments. Stable isotope analysis of carbon (δ13C) and oxygen (δ18O) values in fossil crocodylian tooth enamel carbonate (CO3) provides evidence for niche partitioning between these two taxa, which may have co-inhabited estuarine paleoenvironments. Our isotopic results imply that alligators procured prey from primarily freshwater or terrestrial sources, whereas tomistomines fed mainly on marine-based prey items. As indicators of saltwater paleoenvironments, the fossil tomistomines may therefore be informative for tracking Miocene sea level change. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68446
Appears in Collections: 过去全球变化的重建
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作者单位: Florida Museum of Natural History, University of Florida, Gainesville, FL, United States; Department of Anthropology, University of Florida, Gainesville, FL, United States
Recommended Citation:
Whiting E.T.,Steadman D.W.,Krigbaum J.. Paleoecology of Miocene crocodylians in Florida: Insights from stable isotope analysis[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,451