气候变化领域集成服务门户(CCPortal): Dietary signals in dental microwear of predatory small mammals appear unaffected by extremes in environmental abrasive load

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DOI	10.1016/j.palaeo.2020.109929
	Dietary signals in dental microwear of predatory small mammals appear unaffected by extremes in environmental abrasive load
	Adams N.F.; Gray T.; Purnell M.A.
发表日期	2020
ISSN	0031-0182
卷号	558
英文摘要	Dental microwear texture analysis (DMTA) is a key proxy used to reconstruct the diets of extant and extinct animals. Causal agents of dental wear have been debated for decades, but the recent controversial suggestion that exogenous abrasives (or ‘grit’ particles) from the environment exert a greater influence on microwear formation than food items has led to renewed interest in this field of research. Feeding trials using large mammals suggest that DMTA can distinguish dietary differences despite variable grit loads. However, the effect of exogenous abrasives on the dental microwear of small, non-herbivorous mammals with quantified grit loads remains untested. Here, we examine dental microwear textures from the European mole (Talpa europaea), which provides an ideal test for the role of grit given moles' subterranean habitat and diet dominated by earthworms that contain, and are coated by, exogenous abrasives. We quantify the environmental abrasive load (by measuring silicate content of soils) and dietary abrasive load (by measuring silicate content of stomach contents) for moles from sites across Norfolk, UK to evaluate the effect of variation in grit loads on microwear textures. No significant relationships are found between microwear texture parameters and any metric of exogenous abrasive load, or between texture parameters and physical soil grit characteristics. Comparing mole microwear textures with those of bats, which have negligible environmental abrasive loads, reveals that moles are indistinguishable in multivariate texture-dietary space from bats that consume ‘soft’ prey, supporting suggestions that microwear textures preserve accurate dietary signatures and are not overwritten by wear from exogenous abrasives. Drawing upon examples from Jurassic mammaliaforms, we demonstrate the implications of these results for reconstructing the diets and habits of fossil mammals. © 2020 The Author(s)
英文关键词	Bats; Dietary reconstruction; Exogenous abrasives; Grit; Jurassic mammaliaforms; Moles
语种	英语
scopus关键词	diet; fossil record; Jurassic; multivariate analysis; silicate; small mammal; texture; England; Norfolk [England]; United Kingdom; Animalia; Mammalia; Talpa europaea
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/150337
作者单位	Centre for Palaeobiology Research, School of Geography, Geology and the Environment, University of Leicester, Leicester, LE1 7RH, United Kingdom
推荐引用方式 GB/T 7714	Adams N.F.,Gray T.,Purnell M.A.. Dietary signals in dental microwear of predatory small mammals appear unaffected by extremes in environmental abrasive load[J],2020,558.
APA	Adams N.F.,Gray T.,&Purnell M.A..(2020).Dietary signals in dental microwear of predatory small mammals appear unaffected by extremes in environmental abrasive load.Palaeogeography, Palaeoclimatology, Palaeoecology,558.
MLA	Adams N.F.,et al."Dietary signals in dental microwear of predatory small mammals appear unaffected by extremes in environmental abrasive load".Palaeogeography, Palaeoclimatology, Palaeoecology 558(2020).