Carbon and nitrogen isotopic fractionation in bone collagen during chemical treatment

2005 ◽  
Vol 222 (1-2) ◽  
pp. 65-74 ◽  
Author(s):  
Masayo Minami ◽  
Toshio Nakamura
2021 ◽  
pp. 1-15
Author(s):  
Catalina P. Tomé ◽  
S. Kathleen Lyons ◽  
Seth D. Newsome ◽  
Felisa A. Smith

Abstract The late Quaternary in North America was marked by highly variable climate and considerable biodiversity loss including a megafaunal extinction event at the terminal Pleistocene. Here, we focus on changes in body size and diet in Neotoma (woodrats) in response to these ecological perturbations using the fossil record from the Edwards Plateau (Texas) across the past 20,000 years. Body mass was estimated using measurements of fossil teeth and diet was quantified using stable isotope analysis of carbon and nitrogen from fossil bone collagen. Prior to ca. 7000 cal yr BP, maximum mass was positively correlated to precipitation and negatively correlated to temperature. Independently, mass was negatively correlated to community composition, becoming more similar to modern over time. Neotoma diet in the Pleistocene was primarily sourced from C3 plants, but became progressively more reliant on C4 (and potentially CAM) plants through the Holocene. Decreasing population mass and higher C4/CAM consumption was associated with a transition from a mesic to xeric landscape. Our results suggest that Neotoma responded to climatic variability during the terminal Pleistocene through changes in body size, while changes in resource availability during the Holocene likely led to shifts in the relative abundance of different Neotoma species in the community.


2016 ◽  
Vol 7 ◽  
pp. 18-27 ◽  
Author(s):  
Cheng-Yi Lee ◽  
Maa-Ling Chen ◽  
Peter Ditchfield ◽  
Li-Hung Lin ◽  
Pei-Ling Wang ◽  
...  

Author(s):  
Erik Trinkaus ◽  
Alexandra P. Buzhilova ◽  
Maria B. Mednikova ◽  
Maria V. Dobrovolskaya

In addition to the functional, anatomical, and paleopathological reflections of the biology and behavior of the Sunghir humans, it has been possible to make indirect inferences regarding their average dietary profiles. These considerations derive from the mineral compositions of bone samples from Sunghir 1 to 4 (Kozlovskaya 2000d), carbon and nitrogen stable isotope data from the bone collagen of Sunghir 1 to 3 (Richards et al. 2001; Dobrovolskaya et al. 2012), and postcanine buccal microwear for Sunghir 1 to 3 (Pinilla 2012; Pinilla and Trinkaus in press). As noted in chapter 2, the site contained an abundance of large mammal remains, of which the bison, horse, saiga, and especially reindeer remains were undoubtedly brought to the site for human consumption. There was also an abundance of mammoth remains. There has been an ongoing debate as to the extent to which the mammoth remains, found at a number of central and eastern European and Siberian Mid Upper Paleolithic (MUP) sites, reflect human consumption, are largely incidental to the human presence having accumulating along the banks of gullies and streams, and/or were gathered from the landscape for use as raw material and even fuel (e.g., Soffer 1985; Derevianko et al. 2000; Svoboda et al. 2005; Wojtal and Wilczyński 2013). Systematic taphonomic analysis of the Sunghir faunal assemblage has not been undertaken, but Bader (1978) did notice the differential presence of mammoth skeletal elements at Sunghir, suggesting differential transport of body portions presumably for human consumption. Moreover, the mammoth bones were distributed through the cultural layer and apparently did not exist as a bone accumulation on the periphery of the site. At the same time, the faunal profile of the cultural layer contained a diversity of carnivores, of which the cave lions, wolves, and possibly brown bears could have been partially responsible for some of the herbivore remains at the site. It is possible that humans were hunting and eating the bears, given occasional cutmarks on bear bones at other MUP sites (Wojtal 2000; Münzel and Conard 2004).


2017 ◽  
Vol 10 (8) ◽  
pp. 2123-2135 ◽  
Author(s):  
Chelsea Budd ◽  
Necmi Karul ◽  
Songül Alpaslan-Roodenberg ◽  
Alfred Galik ◽  
Rick Schulting ◽  
...  

2012 ◽  
Vol 39 (7) ◽  
pp. 2003-2011 ◽  
Author(s):  
Harry Robson ◽  
Søren Andersen ◽  
Oliver Craig ◽  
Anders Fischer ◽  
Aikaterini Glykou ◽  
...  

Author(s):  
Linda Reynard

Stable isotope ratios of bone collagen have been used to determine trophic levels in diverse archaeological populations. The longest established and arguably most successful isotope system has been nitrogen, followed by carbon, and more recently hydrogen. These trophic level proxies rely on a predictable change in isotope ratio with each trophic level step; however, this requirement may not always be met, which can lead to difficulties in interpreting archaeological evidence. In agricultural communities, in particular, there are several possible complications to the interpretation of nitrogen and carbon isotopes. Recent approaches to overcome these limitations include better quantification and understanding of the influences on consumer isotope ratios; inclusion of evidence from plant remains; further investigation of apatite δ13C—collagen δ13C spacing in bones; measurement of carbon and nitrogen isotope ratios in individual amino acids, rather than collagen; and development of other stable isotope proxies for trophic level, such as hydrogen isotopes.


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