气候变化领域集成服务门户(CCPortal): The effects of population bottlenecks on dental phenotype in extant arvicoline rodents: Implications for studies of the quaternary fossil record

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DOI	10.1016/j.quascirev.2019.106045
	The effects of population bottlenecks on dental phenotype in extant arvicoline rodents: Implications for studies of the quaternary fossil record
	Markova E.; Bobretsov A.; Borodin A.; Rakitin S.; Sibiryakov P.; Smirnov N.; Yalkovskaya L.; Zykov S.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	The consequences of population bottlenecks for dental phenotypes are studied in Arvicolinae, a subfamily of cricetid rodents widely used as a proxy of environmental change and an index group for relative dating and correlation of the Quaternary deposits throughout the Holarctic. Comparative morphological analysis reveals similar phenotypic shifts in populations of extant Dicrostonyx, Lemmus, Myopus, Microtus surviving bottlenecks in captivity or in the areas favouring genetic drift (coastal zones and islands, patchy landscapes in the mountainous areas, declining peripheral populations). Six to ten founders is enough for an isolated population to reproduce the full range of species-specific variability in fitness-related characters (crown complexity and occlusal regularity) during the first two generations, while the average values of both characters exhibit founder dependence. When lasting longer than 3 generations, bottlenecks increase diversity owing to 1) the accumulation of rare traits of complexity and regularity inherited from the founders and 2) inbreeding impacts (the loss of advanced morphology and appearance of extra elements in places of the lophs and cusplets of an ancestral cricetid molar). Founder-related and inbreeding-induced simplifications of dentition might potentially lead to biochronological discrepancies in the fossil record of Arvicolinae. To detect possible biases in biochronological data, the phenotypic markers of close breeding are identified. Application of the results to the fossil record of collared lemmings from the north of West Siberia allows hypothesising the periods of increased genetic drift in the ancestral forms of Dicrostonyx in the late Middle Pleistocene and in the early Late Pleistocene. © 2019 Elsevier Ltd
英文关键词	Biological proxies; Climate dynamics; Dental variation; Genetic drift; Pleistocene; Population decline; Present; Small mammals
语种	英语
scopus关键词	Coastal zones; Mammals; Biological proxies; Climate dynamics; Dental variation; Genetic drifts; Pleistocene; Population decline; Present; Small mammals; Population statistics; captivity; climate variation; complexity; dentition; fossil record; genetic drift; inbreeding; isolated population; population decline; reproductive behavior; rodent; Siberia; Arvicolinae; Cricetidae; Dicrostonyx; Lemmus; Mammalia; Microtus; Myopus; Rodentia
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/151641
作者单位	Institute of Plant and Animal Ecology, UrB RAS, Ekaterinburg, Russian Federation; Institute of Biology Komi Science Centre, UrB RAS, Syktyvkar, Russian Federation; Pechora-Ilych State Nature Reserve, Yaksha, Komi Republic, Russian Federation; Ural Federal University, Ekaterinburg, Russian Federation
推荐引用方式 GB/T 7714	Markova E.,Bobretsov A.,Borodin A.,et al. The effects of population bottlenecks on dental phenotype in extant arvicoline rodents: Implications for studies of the quaternary fossil record[J],2020,228.
APA	Markova E..,Bobretsov A..,Borodin A..,Rakitin S..,Sibiryakov P..,...&Zykov S..(2020).The effects of population bottlenecks on dental phenotype in extant arvicoline rodents: Implications for studies of the quaternary fossil record.Quaternary Science Reviews,228.
MLA	Markova E.,et al."The effects of population bottlenecks on dental phenotype in extant arvicoline rodents: Implications for studies of the quaternary fossil record".Quaternary Science Reviews 228(2020).