气候变化领域集成服务门户(CCPortal): The turnover of dental microwear texture: Testing the” last supper” effect in small mammals in a controlled feeding experiment

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DOI	10.1016/j.palaeo.2020.109930
	The turnover of dental microwear texture: Testing the” last supper” effect in small mammals in a controlled feeding experiment
	Winkler D.E.; Schulz-Kornas E.; Kaiser T.M.; Codron D.; Leichliter J.; Hummel J.; Martin L.F.; Clauss M.; Tütken T.
发表日期	2020
ISSN	0031-0182
卷号	557
英文摘要	Dental microwear texture (DMT) analysis is commonly applied for dietary reconstruction of vertebrates. The temporal scale on which dietarily informative microscopic wear forms on enamel surfaces is crucial to infer dietary flexibility and seasonality. Microwear is assumed to form shortly before the individual's death, reflecting information pertaining to the last meals consumed (“last supper” effect). In primate feeding experiments, microwear features formed within hours, suggesting rates of turnover within one to two weeks. As DMT formation experiments testing the persistence of microwear three-dimensionally (textures) are still lacking, we test how quickly DMTs form and pre-existing ones are overwritten in a terminal feeding experiment with 72 rats. In two groups of 36, rats received either a standard pelleted diet or the same pelleted diet containing 4% loess, an aeolian, silt-sized sediment, for 24 consecutive days. Then 6 individuals from each group were sacrificed, while the rest (n = 30) were switched to the diet they had not received before. On day 1, 2, 4, 8, 16, and 24 after the diet switch, 5 of the remaining individuals were sacrificed, creating a cohort of n = 5 each for each time point. We applied DMT analysis on first and second upper molars. For upper second molars, rats show a subsequent change in DMT after the switch, with visible differences from day 2 on. On upper first molars, microwear textures were variable for individuals sacrificed directly after the initial 24-day feeding period, thus obscuring significant differences in diet-induced dental wear. We find turnover faster and more pronounced when switching from loess-containing to standard pellet as compared to the opposite switch. The trend for either decreasing or increasing parameter values after the diet switch approaches a plateau between 16 and 24 days for many DMT parameters, suggesting that, under these experimental conditions, the “last supper” effect needs at least two weeks to overwrite previous DMT patterns. © 2020 Elsevier B.V.
英文关键词	Dental wear; Diet change; Diet reconstruction; DMTA; Surface texture
语种	英语
scopus关键词	diet; experimental study; feeding behavior; particle size; persistence; small mammal; texture; three-dimensional modeling; tooth; wear; Mammalia; Primates; Rattus; Vertebrata
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/150360
作者单位	Institute for Geosciences, Johannes Gutenberg University Mainz, Mainz, Germany; Center of Natural History, University of Hamburg, Hamburg, Germany; Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany; Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa; Department of Animal Sciences, Ruminant Nutrition, University of Goettingen, Goettingen, Germany; Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Winkler D.E.,Schulz-Kornas E.,Kaiser T.M.,等. The turnover of dental microwear texture: Testing the” last supper” effect in small mammals in a controlled feeding experiment[J],2020,557.
APA	Winkler D.E..,Schulz-Kornas E..,Kaiser T.M..,Codron D..,Leichliter J..,...&Tütken T..(2020).The turnover of dental microwear texture: Testing the” last supper” effect in small mammals in a controlled feeding experiment.Palaeogeography, Palaeoclimatology, Palaeoecology,557.
MLA	Winkler D.E.,et al."The turnover of dental microwear texture: Testing the” last supper” effect in small mammals in a controlled feeding experiment".Palaeogeography, Palaeoclimatology, Palaeoecology 557(2020).