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DOI	10.1016/j.quascirev.2019.04.025
	Reframing the mammoth steppe: Insights from analysis of isotopic niches
	Schwartz-Narbonne R.; Longstaffe F.J.; Kardynal K.J.; Druckenmiller P.; Hobson K.A.; Jass C.N.; Metcalfe J.Z.; Zazula G.
发表日期	2019
ISSN	0277-3791
起始页码	1
结束页码	21
卷号	215
英文摘要	Woolly mammoth (Mammuthus primigenius), horse (Equus spp.)and bison (Bison spp.)coexisted with a variety of mammalian megafauna across the Pleistocene mammoth steppe – a megacontinental ecosystem that spanned northern Eurasia and northwestern North America. Previous research has suggested that highly conserved niches with minimal niche overlap allowed high levels of species diversity on the mammoth steppe. Here we evaluate previously published and some new collagen carbon and nitrogen isotope data (δ13C, δ15N)for mammoth steppe megaherbivores using Stable Isotope Bayesian Ellipses in R (SIBER)and linear regression models to determine isotopic niches for individual species during broad time intervals (pre-, during and post-Last Glacial Maximum (LGM))at multiple geographic regions across the mammoth steppe. Individual species maintained relatively consistent isotopic niche positions at different geographic locations and during different times. Diet and habitat niches for any given species appear to have been similar across the mammoth steppe. Between some regions and times, however, species' isotopic niches changed, suggesting adaptation to local climatic conditions and/or changes in the nitrogen isotope patterns at the base of the food web. Isotopic niche overlap, including at the level of core niche overlap (>60% overlap), was observed in at least one time and region for most species. This overlap suggests high levels of functional redundancy in the ecosystem, whereby one species could fulfil another's ecological role in the latter's absence. Despite spatial and temporal environmental variation, species' adaptability and functional redundancy within the ecosystem would have made the mammoth steppe a highly resilient ecosystem. © 2019 Elsevier Ltd
语种	英语
scopus关键词	Ecosystems; Mammals; Nitrogen; Redundancy; Regression analysis; Carbon and nitrogen isotopes; Climatic conditions; Environmental variations; Functional redundancy; Geographic location; Last Glacial Maximum; Linear regression models; Nitrogen isotopes; Isotopes; biogeographical region; climate conditions; collagen; elephant; food web; niche overlap; nitrogen isotope; Pleistocene; species diversity; Eurasia; North America; Bison; Equidae; Equus; Mammalia; Mammuthus primigenius
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151916
作者单位	Department of Earth Sciences, The University of Western Ontario, London, ON N6A 5B7, Canada; Wildlife and Landscape Science Division, Environment & Climate Change Canada, Saskatoon, SK S7N 3H5, Canada; University of Alaska Museum of the North and University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Biology, The University of Western Ontario, London, ON N6A 5B7, Canada; Royal Alberta Museum, Edmonton, AB T5J 0G2, Canada; Department of Anthropology, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada; Government of Yukon, Tourism & Culture (Palaeontology Program), Whitehorse, YT Y1A 2C6, Canada; Research and Collections, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, ON K1P 6P4, Canada
推荐引用方式 GB/T 7714	Schwartz-Narbonne R.,Longstaffe F.J.,Kardynal K.J.,et al. Reframing the mammoth steppe: Insights from analysis of isotopic niches[J],2019,215.
APA	Schwartz-Narbonne R..,Longstaffe F.J..,Kardynal K.J..,Druckenmiller P..,Hobson K.A..,...&Zazula G..(2019).Reframing the mammoth steppe: Insights from analysis of isotopic niches.Quaternary Science Reviews,215.
MLA	Schwartz-Narbonne R.,et al."Reframing the mammoth steppe: Insights from analysis of isotopic niches".Quaternary Science Reviews 215(2019).