Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs

IVPP-IR > 中科院古脊椎所（2000年以后）

	Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs
	Allen, Vivian 1,2; Bates, Karl T.3; Li, Zhiheng 4,5; Hutchinson, John R.2
	2013-05-02
发表期刊	NATURE
卷号	497 期号:7447 页码:104-107
文章类型	Article
摘要	Locomotion in living birds (Neornithes) has two remarkable features: feather-assisted flight, and the use of unusually crouched hindlimbs for bipedal support and movement. When and how these defining functional traits evolved remains controversial(1-8). However, the advent of computer modelling approaches and the discoveries of exceptionally preserved key specimens now make it possible to use quantitative data on whole-body morphology to address the biomechanics underlying this issue. Here we use digital body reconstructions to quantify evolutionary trends in locomotor biomechanics (whole-body proportions and centre-of-mass position) across the clade Archosauria. We use three-dimensional digital reconstruction to estimate body shape from skeletal dimensions for 17 archosaurs along the ancestral bird line, including the exceptionally preserved, feathered taxa Microraptor, Archaeopteryx, Pengornis and Yixia-nornis, which represent key stages in the evolution of the avian body plan. Rather than a discrete transition from more-upright postures in the basal-most birds (Avialae) and their immediate outgroup deinonychosauria(5,6), our results support hypotheses of a gradual, stepwise acquisition of more-crouched limb postures across much of theropod evolution(1-4), although we find evidence of an accelerated change within the clade Maniraptora (birds and their closest relatives, such as deinonychosaurs). In addition, whereas reduction of the tail is widely accepted to be the primary morphological factor correlated with centre-of-mass position and, hence, evolution of hindlimb posture(1-8), we instead find that enlargement of the pectoral limb and several associated trends have a much stronger influence. Intriguingly, our support for the onset of accelerated morpho-functional trends within Maniraptora is closely correlated with the evolution of flight. Because we find that the evolution of enlarged forelimbs is strongly linked, via whole-body centre of mass, to hindlimb function during terrestrial locomotion, we suggest that the evolution of avian flight is linked to anatomical novelties in the pelvic limb as well as the pectoral.
WOS标题词	Science & Technology
关键词[WOS]	TERRESTRIAL LOCOMOTION ; ELECTROMYOGRAPHIC ANALYSIS ; THEROPOD LOCOMOTION ; HUMAN WALKING ; LIMB FUNCTION ; MECHANICS ; FLIGHT ; PERFORMANCE
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000318221500042
引用统计	被引频次：98[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7317
专题	中科院古脊椎所（2000年以后）
作者单位	1.Univ Jena, Inst Spezielle Zool & Evolut Biol, D-07743 Jena, Germany 2.Univ London Royal Vet Coll, Struct & Mot Lab, Hatfield AL9 7TA, Herts, England 3.Univ Liverpool, Inst Ageing & Chron Dis, Dept Musculoskeletal Biol 2, Liverpool L69 3GA, Merseyside, England 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100034, Peoples R China 5.Univ Texas Austin, Dept Geol Sci, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Allen, Vivian,Bates, Karl T.,Li, Zhiheng,et al. Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs[J]. NATURE,2013,497(7447):104-107.
APA	Allen, Vivian,Bates, Karl T.,Li, Zhiheng,&Hutchinson, John R..(2013).Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs.NATURE,497(7447),104-107.
MLA	Allen, Vivian,et al."Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs".NATURE 497.7447(2013):104-107.