气候变化领域集成服务门户(CCPortal): Stable isotopes reveal differential patterns of Holocene environmental change among tuco-tucos (Rodentia: Ctenomyidae; Ctenomys) from Patagonia

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DOI	10.1016/j.palaeo.2019.109522
	Stable isotopes reveal differential patterns of Holocene environmental change among tuco-tucos (Rodentia: Ctenomyidae; Ctenomys) from Patagonia
	Takenaka R.; Miller M.J.; Tammone M.N.; Dawson T.E.; Lacey E.A.
发表日期	2020
ISSN	0031-0182
卷号	540
英文摘要	To explore the role of past environmental changes in shaping interspecific differences in genetic structure among tuco-tucos (Rodentia: Ctenomyidae, Ctenomys) from the Limay Valley of northern Patagonia, we compared δ13C and δ18O values for modern and historical tooth enamel from the colonial tuco-tuco (C. sociabilis) and the parapatric Patagonian tuco-tuco (C. haigi). Specifically, we sought to test the hypothesis that a mid-Holocene loss of genetic variation in C. sociabilis was associated with environmental change. For both species, the δ13C composition of tooth enamel differed significantly (~ 5.1‰ difference in mean δ13C values) between modern and Holocene (0.5–12 kyr B.P.) samples, suggesting marked temporal changes in the vegetation consumed. For C. sociabilis, no statistically significant differences in the δ13C composition of teeth were found among individuals from the early, middle, and late Holocene. In contrast, significant differences in δ13C values were found between middle and late Holocene samples from C. haigi. None of our analyses revealed statistically significant differences in δ18O values. Thus, although the diets of both study species have changed from the Holocene to the present, only C. haigi experienced significant dietary changes during the Holocene. We suggest that the ecologically more specialized C. sociabilis continued to consume the same food resources even as changing Holocene conditions caused preferred habitats to disappear. In contrast, the more generalized C. haigi altered its diet, allowing populations of this species to remain widespread despite changing Holocene environments. © 2019 Elsevier B.V.
英文关键词	Bioapatite; Carbon isotope; Diet; Enamel; Genetic structure; Small mammal
语种	英语
scopus关键词	apatite; carbon isotope; enamel; environmental change; genetic structure; genetic variation; Holocene; interspecific variation; rodent; small mammal; stable isotope; Argentina; Limay Valley; Patagonia; Ctenomyidae; Ctenomys; Ctenomys haigi; Ctenomys sociabilis; Mammalia; Rodentia
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/150617
作者单位	Museum of Vertebrate Zoology, 3010 VLSB, University of California, Berkeley, CA 94720-3140, United States; Department of Integrative Biology, University of California, Berkeley, CA 94720-3140, United States; Department of Anatomy, University of Otago, Dunedin, 9016, New Zealand; Archaeological Research Facility, University of California, Berkeley, CA 94720, United States; Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA-CONICET) y Programa de Estudios Aplicados a la Conservación (CENAC-PN Nahuel Huapi), Bariloche, Río Negro 8400, Argentina
推荐引用方式 GB/T 7714	Takenaka R.,Miller M.J.,Tammone M.N.,et al. Stable isotopes reveal differential patterns of Holocene environmental change among tuco-tucos (Rodentia: Ctenomyidae; Ctenomys) from Patagonia[J],2020,540.
APA	Takenaka R.,Miller M.J.,Tammone M.N.,Dawson T.E.,&Lacey E.A..(2020).Stable isotopes reveal differential patterns of Holocene environmental change among tuco-tucos (Rodentia: Ctenomyidae; Ctenomys) from Patagonia.Palaeogeography, Palaeoclimatology, Palaeoecology,540.
MLA	Takenaka R.,et al."Stable isotopes reveal differential patterns of Holocene environmental change among tuco-tucos (Rodentia: Ctenomyidae; Ctenomys) from Patagonia".Palaeogeography, Palaeoclimatology, Palaeoecology 540(2020).