DOI: 10.1016/j.palaeo.2012.08.012
论文题名: Pterosaur diversity: Untangling the influence of sampling biases, Lagerstätten, and genuine biodiversity signals
作者: Butler R.J. ; Benson R.B.J. ; Barrett P.M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 372 起始页码: 78
结束页码: 87
语种: 英语
英文关键词: Disparity
; Diversity
; Lagerstätten
; Pterodactyloidea
; Pterosauria
; Sampling biases
; Species-richness
英文摘要: Pterosaurs were a diverse and successful group of Mesozoic reptiles with an evolutionary history that extended for approximately 145. Myr. Recent attempts to understand species-richness trajectories for pterosaurs have led to them becoming a focal group for ongoing debate about the importance of sampling biases in determining observed species-richness patterns in the vertebrate fossil record. Here, we reanalyse pterosaur species-richness through time, and make statistical comparisons to proxies for pterosaur fossil record sampling and 'global' terrestrial tetrapod sampling, using several approaches including generalised least-squares multiple regression models. Moreover, we make quantitative comparisons between species-richness and morphological diversity (disparity). Sampling of the pterosaur fossil record shows substantial temporal heterogeneity, with Cretaceous pterosaur records more commonly recovered from terrestrial environments, and with sampling proxies for Cretaceous pterosaurs closely tracking 'global' sampling proxies for terrestrial tetrapods. The similarities between pterosaur-based and 'global' sampling proxies for Cretaceous data call into question the hypothesis that observed correlations between pterosaur sampling proxies and pterosaur species-richness result from mere 'redundancy'. Multiple regression modelling supports the hypothesis that much of the variation present in pterosaur palaeobiodiversity curves results from a combination of the presence or absence of Lagerstätten (sites of exceptional preservation) and a 'background' sampling signal that may reflect temporal variation in fossiliferous sedimentary rock. Despite these evident strong biases in the pterosaur record, it seems plausible that both species-richness and disparity peaked relatively late in the evolutionary history of pterosaurs (during the Late Jurassic-Early Cretaceous), although an absence of pterosaur-bearing terrestrial Lagerstätten in the Late Triassic-Early Jurassic fossil record means that caution is required. It is possible that a late peak in diversity may reflect the ecological radiation of pterodactyloid pterosaurs from the Late Jurassic onwards, which has been linked to increased terrestrial locomotory abilities and ecological niche occupancy and relaxed constraints upon body size evolution. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69838
Appears in Collections: 过去全球变化的重建
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作者单位: GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, D-80333 Munich, Germany; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom; Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, United Kingdom; Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom
Recommended Citation:
Butler R.J.,Benson R.B.J.,Barrett P.M.. Pterosaur diversity: Untangling the influence of sampling biases, Lagerstätten, and genuine biodiversity signals[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,372