DOI: 10.1016/j.quascirev.2013.07.004
Scopus记录号: 2-s2.0-84881096325
论文题名: Proboscideans and paleoenvironments of the Pleistocene Great Lakes: Landscape, vegetation, and stable isotopes
作者: Metcalfe J.Z. ; Longstaffe F.J. ; Hodgins G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 76 起始页码: 102
结束页码: 113
语种: 英语
英文关键词: Carbon isotope
; Diet
; Extinction
; Great Lakes
; Mammoth
; Mastodon
; Megafauna
; Migration
; New York
; Niche
; Nitrogen isotope
; Ontario
; Oxygen isotope
; Pleistocene
Scopus关键词: Carbon isotopes
; Great lakes
; Mammoth
; Mastodon
; Megafauna
; Migration
; New York
; Niche
; Nitrogen isotopes
; Ontario
; Oxygen isotopes
; Pleistocene
; Forestry
; Glacial geology
; Lakes
; Light extinction
; Nitrogen
; Nitrogen fixation
; Nutrition
; Oxygen
; Plants (botany)
; Tooth enamel
; Isotopes
; carbon isotope
; extinction
; landscape
; meltwater
; niche partitioning
; nitrogen isotope
; paleoenvironment
; Pleistocene
; precipitation (climatology)
; radiocarbon dating
; stable isotope
; taxonomy
; vegetation structure
; Carbon
; Isotopes
; Nitrogen
; Oxygen
; Plants
; Great Lakes [North America]
英文摘要: In this study, we review the history of proboscideans in the Great Lakes region (Ontario and western New York) in the context of local glacial and vegetational histories. Further, we investigate mammoth (Mammuthus) and mastodon (Mammut) environmental niche partitioning using stable isotope analysis of bone and dentin collagen (δ13Ccol, δ15Ncol) and structural carbonate in tooth enamel bioapatite (δ13Csc, δ18Osc), and demonstrate that stable isotopes can be used to identify non-locals among museum specimens with no contextual records. New radiocarbon dates suggest that Ontario mastodons lived in tundra-like environments as well as their more common spruce forest habitat. Local Ontario/New York mammoths and mastodons consumed 100% C3-plant diets and drank low-18O waters, consistent with colder-than-modern climates and proximity to glacial meltwater sources. Mammoths and mastodons occupied distinct environmental niches, characterized by different oxygen- and nitrogen-isotope compositions and geographical locations. This suggests that direct competition for resources was not a major factor in their local extinction. We suggest that both mammoths and mastodons obtained water from sources formed primarily from precipitation rather than glacial meltwater. We describe how high δ15N values in mammoths could have been caused by a combination of preferences for dry environments, consumption of low-nutrient forage (particularly stems and stalks), coprophagy, geophagy, and dung fertilization. We argue that low δ15N values in mastodons could have been caused by consumption of trees and shrubs (including nitrogen-fixing taxa) and a preference for recently deglaciated landscapes and/or spruce environments. Finally, we raise the possibility that mastodons contributed to the spruce-pine transition by browsing directly on spruce trees. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60540
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, University of Western Ontario, London, ON N6A 5B7, Canada; NSF Arizona AMS Laboratory, Department of Physics, University of Arizona, Tucson, AZ 85721-0081, United States; School of Anthropology, University of Arizona, Tucson, AZ 85721-0081, United States
Recommended Citation:
Metcalfe J.Z.,Longstaffe F.J.,Hodgins G.. Proboscideans and paleoenvironments of the Pleistocene Great Lakes: Landscape, vegetation, and stable isotopes[J]. Quaternary Science Reviews,2013-01-01,76