globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.06.003
论文题名:
Combining histology, stable isotope analysis and ZooMS collagen fingerprinting to investigate the taphonomic history and dietary behaviour of extinct giant tortoises from the Mare aux Songes deposit on Mauritius
作者: van der Sluis L.G.; Hollund H.I.; Buckley M.; De Louw P.G.B.; Rijsdijk K.F.; Kars H.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 416
起始页码: 80
结束页码: 91
语种: 英语
英文关键词: Cylindraspis ; Diagenesis ; Stable isotopes ; Taphonomy ; ZooMS
英文摘要: Taphonomic research of bones can provide additional insight into a site's formation and development, the burial environment and ongoing post-mortem processes. A total of 30 tortoise (Cylindraspis) femur bone samples from the Mare aux Songes site (Mauritius) were studied histologically, assessing parameters such as presence and type of microbial alteration, inclusions, staining/infiltrations, the degree of microcracking and birefringence. The absence of microbial attack in the 4200year old Mare aux Songes bones suggests the animals rapidly entered the soil whole-bodied and were sealed anoxically, although they suffered from biological and chemical degradation (i.e. pyrite formation/oxidation, mineral dissolution and staining) related to changes in the site's hydrology. Additionally, carbon and nitrogen stable isotopes were analysed to obtain information on the animals' feeding behaviour. The results show narrowly distributed δ13C ratios, indicating a terrestrial C3 plant-based diet, combined with a wide range in δ15N ratios. This is most likely related to the tortoises' drought-adaptive ability to change their metabolic processes, which can affect the δ15N ratios. Furthermore, ZooMS collagen fingerprinting analysis successfully identified two tortoise species (C. triserrata and C. inepta) in the bone assemblage, which, when combined with stable isotope data, revealed significantly different δ15N ratios between the two tortoise species. As climatic changes around this period resulted in increased aridity in the Mascarene Islands, this could explain the extremely elevated δ15N ratio in our dataset. The endemic fauna was able to endure the climatic changes 4200years ago, although human arrival in the 17th century changed the original habitat to such an extent that it resulted in the extinction of several species. Fortunately we are still able to study these extinct tortoises due to the beneficial conditions of their burial environment, resulting in excellent bone preservation. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69151
Appears in Collections:过去全球变化的重建

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作者单位: VU University Amsterdam, Institute for Geo- and Bioarchaeology, De Boelelaan 1085, Amsterdam, Netherlands; Archaeological Museum, University of Stavanger, Peder Klows gate 30, Stavanger, Norway; Manchester Institute of Biotechnology, Faculty of Life Sciences, 131 Princess Street, Manchester, United Kingdom; Deltares, Department of Soil and Groundwater, P.O. Box 85467, AL Utrecht, Netherlands; Computational GeoEcology Group, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94248, GE Amsterdam, Netherlands

Recommended Citation:
van der Sluis L.G.,Hollund H.I.,Buckley M.,et al. Combining histology, stable isotope analysis and ZooMS collagen fingerprinting to investigate the taphonomic history and dietary behaviour of extinct giant tortoises from the Mare aux Songes deposit on Mauritius[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,416
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