DOI: 10.1016/j.quascirev.2017.01.022
Scopus记录号: 2-s2.0-85013072514
论文题名: Diet and habitat of the saiga antelope during the late Quaternary using stable carbon and nitrogen isotope ratios
作者: Jürgensen J. ; Drucker D.G. ; Stuart A.J. ; Schneider M. ; Buuveibaatar B. ; Bocherens H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 160 起始页码: 150
结束页码: 161
语种: 英语
英文关键词: Carbon-13
; Conservation paleobiology
; Evolution
; Mammoth steppe
; Nitrogen-15
; Paleoecology
; Saiga antelope (Saiga tatarica)
Scopus关键词: Bone
; Collagen
; Conservation
; Ecosystems
; Glacial geology
; Isotopes
; Nitrogen
; Carbon-13
; Evolution
; Mammoth steppe
; Nitrogen-15
; Paleoecology
; Saiga antelope (Saiga tatarica)
; Ecology
; Beringia
; carbon isotope ratio
; conservation management
; desert
; diet
; endangered species
; evolutionary biology
; fossil record
; Last Glacial Maximum
; lichen
; niche
; nitrogen isotope
; Northern Hemisphere
; paleobiology
; paleoecology
; range expansion
; stable isotope
; steppe
; ungulate
; Alaska
; Central Asia
; France
; Mongolia
; Russian Federation
; Siberia
; United States
; Amaranthaceae
; Rangifer tarandus
; Saiga
; Saiga tatarica
; Ungulata
英文摘要: Saiga antelope (Saiga tatarica) is one of the typical late Pleistocene species of the cold and arid mammoth steppe that covered a large area of northern hemisphere. The species is currently endangered and persists only in small areas of Central Asian steppe and desert ecosystems. The investigation of the ecology of the Pleistocene saiga using stable isotope ratios (δ13C, δ15N) aimed to decipher how different their diet and habitat were from those observed nowadays in relict populations. Up to 76 samples of bone collagen of ancient saiga from Western Europe, Siberia and Eastern Beringia were analysed and compared with 52 samples of hair and bone collagen of modern specimens from Kazahkstan, Russia and Mongolia. The δ13C values of the ancient saiga do not exhibit a clear trend over time. They cover the same range of values as the modern ones, from a C3-dominated to a C3-C4-dominated mixed diet (including probably Chenopodiaceae). In contrast, the δ15N values of fossil saigas are more variable and lower on average than the extant ones. The lowest δ15N values of ancient saiga are found around the Last Glacial Maximum, reflecting the influence of the cold conditions at that time. On the other hand, fossil saiga occupying the same regions as the historical and modern populations exhibit high δ15N values similar to the modern ones, confirming ecological continuity over time. Modern saiga is thus occupying just one of its potential diverse habitats they used in the past. Therefore, the extant saiga is not a refugee species confined to a suboptimal habitat. During the late Pleistocene, the saiga occupied a separate niche compared with the other ungulates of the mammoth steppe. However, this species could also adapt to a lichen-dominated diet normally seen in reindeer, leading to an isotopic overlap between the two species in south-western France and Alaska around the Last Glacial Maximum. This adaptation allowed a geographical expansion that does not correspond to a habitat-tracking episode. Hence, the realized niche currently observed for the saiga is reduced compared with their potential capacity for adaptation, a crucially important factor for the conservation of this endangered species. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59288
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Geosciences, Biogeology, University of Tübingen, Hölderlinstrasse 12, Tübingen, Germany; Department of Biosciences, Durham University, Durham, United Kingdom; Wildlife Conservation Society, Mongolia Program, Ulaanbaatar, Mongolia; Senckenberg Research Center for Human Evolution and Palaeoenvironment (HEP), University of Tübingen, Hölderlinstr. 12, Tübingen, Germany
Recommended Citation:
Jürgensen J.,Drucker D.G.,Stuart A.J.,et al. Diet and habitat of the saiga antelope during the late Quaternary using stable carbon and nitrogen isotope ratios[J]. Quaternary Science Reviews,2017-01-01,160