The diet-body offset in human nitrogen isotopic values: A controlled dietary study
The “trophic level enrichment” between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet–body Δ15N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3–5‰ in the archaeological literatu...
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| Published in | American journal of physical anthropology Vol. 149; no. 3; pp. 426 - 434 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.11.2012
Wiley-Liss Wiley Subscription Services, Inc |
| Subjects | |
| Online Access | Get full text |
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| Abstract | The “trophic level enrichment” between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet–body Δ15N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3–5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30‐day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short‐term changes in diet causing isotopic changes in the body pool. The Δ15Ndiet‐RBC was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ15Ndiet‐keratin as +5.0–5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ15Ndiet‐collagen of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. |
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| AbstractList | The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet-body Δ(15) N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3-5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The Δ(15) N(diet-RBC) was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ(15) N(diet-keratin) as +5.0-5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ(15) N(diet-collagen) of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet.The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet-body Δ(15) N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3-5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The Δ(15) N(diet-RBC) was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ(15) N(diet-keratin) as +5.0-5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ(15) N(diet-collagen) of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. The “trophic level enrichment” between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet–body Δ 15 N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3–5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30‐day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short‐term changes in diet causing isotopic changes in the body pool. The Δ 15 N diet‐RBC was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ 15 N diet‐keratin as +5.0–5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ 15 N diet‐collagen of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. The “trophic level enrichment” between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet–body Δ15N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3–5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30‐day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short‐term changes in diet causing isotopic changes in the body pool. The Δ15Ndiet‐RBC was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ15Ndiet‐keratin as +5.0–5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ15Ndiet‐collagen of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet-body Δ(15) N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3-5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The Δ(15) N(diet-RBC) was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ(15) N(diet-keratin) as +5.0-5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ(15) N(diet-collagen) of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet-body [Delta]15N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3-5[per thousand] in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The [Delta]15Ndiet-RBC was measured as +3.5[per thousand]. Using measured offsets from other studies, we estimate the human [Delta]15Ndiet-keratin as +5.0-5.3[per thousand], which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for [Delta]15Ndiet-collagen of [asymptotically =]6[per thousand], again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. [PUBLICATION ABSTRACT] The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet–body Δ 15 N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3–5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The Δ 15 N diet-RBC was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ 15 N diet-keratin as +5.0–5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ 15 N diet-collagen of ≍6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. The 'trophic level enrichment' between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the diet-body Δ15N spacing has proved difficult, particularly for humans. The value is usually assumed to be +3-5‰ in the archaeological literature. We report here the first (to our knowledge) data from humans on isotopically known diets, comparing dietary intake and a body tissue sample, that of red blood cells. Samples were taken from 11 subjects on controlled diets for a 30-day period, where the controlled diets were designed to match each individual's habitual diet, thus reducing problems with short-term changes in diet causing isotopic changes in the body pool. The Δ ;15Ndiet-RBC was measured as +3.5‰. Using measured offsets from other studies, we estimate the human Δ ;15Ndiet-keratin as +5.0-5.3‰, which is in good agreement with values derived from the two other studies using individual diet records. We also estimate a value for Δ ;15Ndiet-collagen of ≈6‰, again in combination with measured offsets from other studies. This value is larger than usually assumed in palaeodietary studies, which suggests that the proportion of animal protein in prehistoric human diet may have often been overestimated in isotopic studies of palaeodiet. Am J Phys Anthropol, 2012. © 2012 Wiley Periodicals, Inc. Copyright John Wiley & Sons. Reproduced with permission. An electronic version of this article is available online at http://www.interscience.wiley.com |
| Author | Kneale, C.J. O'Connell, T.C. Kuhnle, G.G.C. Tasevska, N. |
| Author_xml | – sequence: 1 givenname: T.C. surname: O'Connell fullname: O'Connell, T.C. email: tco21@cam.ac.uk organization: Department of Archaeology and Anthropology, University of Cambridge, UK – sequence: 2 givenname: C.J. surname: Kneale fullname: Kneale, C.J. organization: McDonald Institute for Archaeological Research, University of Cambridge, UK – sequence: 3 givenname: N. surname: Tasevska fullname: Tasevska, N. organization: MRC Dunn Human Nutrition Unit, Wellcome Trust/MRC, Building, Cambridge, UK – sequence: 4 givenname: G.G.C. surname: Kuhnle fullname: Kuhnle, G.G.C. organization: Department of Food and Nutritional Sciences, University of Reading, UK |
| BackLink | http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26515602$$DView record in Pascal Francis https://www.ncbi.nlm.nih.gov/pubmed/23042579$$D View this record in MEDLINE/PubMed |
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Stable carbon and nitrogen isotopic fractionation between diet and tissues of captive seals: implications 2002; 16 2009; 45 2009; 89 1991; 18 2009; 46 2009; 41 2002; 18 1997; 153 2003; 13 1996; 74 1996; 100 1997; 5 2007; 34 1983; 57 1992; 94 1999a; 108 1981; 45 1994; 21 2005b; 19 2006; 136 1999b; 26 1992; 7 2010; 20 2010; 26 2006; 20 2006; 209 2000 2005; 144 2002; 83 2003; 6 2000; 55 2007; 133 1999; 53 2008; 22 2007; 3 2011; 25 1985; 12 2004; 139 2009; 23 2012; 142 1987; 51 2003; 81 2012 1984; 48 2009 1997 1983; 32 1986; 18 1977; 42 2000; 71 2006 2005a; 135 2001; 28 2005; 83 2002; 80 1991 2001; 129 2003; 136 1985; 42 1996; 53 1999; 9 33 1981; 292 2005; 19 1986; 322 2003; 425 2004; 18 1993; 95 1986; 20 2000; 78 2001; 4 1986; 69 2002; 22 2009; 4 2011; 141 2003; 102 2011; 145 1981; 12 2005; 14 e_1_2_8_28_1 Hobson KA (e_1_2_8_31_1) 1996; 53 e_1_2_8_24_1 e_1_2_8_26_1 e_1_2_8_49_1 e_1_2_8_68_1 e_1_2_8_3_1 e_1_2_8_81_1 e_1_2_8_5_1 e_1_2_8_7_1 e_1_2_8_9_1 Team RDC (e_1_2_8_75_1) 2009 e_1_2_8_20_1 e_1_2_8_43_1 e_1_2_8_66_1 e_1_2_8_22_1 e_1_2_8_45_1 e_1_2_8_64_1 Muhammad‐Lawal A (e_1_2_8_50_1) 2007; 3 e_1_2_8_85_1 e_1_2_8_41_1 e_1_2_8_60_1 e_1_2_8_83_1 e_1_2_8_17_1 Landaw SA (e_1_2_8_40_1) 1991 e_1_2_8_19_1 e_1_2_8_13_1 e_1_2_8_59_1 e_1_2_8_15_1 e_1_2_8_57_1 e_1_2_8_32_1 e_1_2_8_55_1 e_1_2_8_78_1 Thompson AH (e_1_2_8_76_1) 2011; 141 e_1_2_8_11_1 e_1_2_8_53_1 e_1_2_8_51_1 Sluijs I (e_1_2_8_70_1); 33 e_1_2_8_74_1 e_1_2_8_30_1 e_1_2_8_72_1 e_1_2_8_29_1 Ambrose SH (e_1_2_8_2_1) 2000 e_1_2_8_25_1 e_1_2_8_46_1 e_1_2_8_27_1 e_1_2_8_48_1 e_1_2_8_69_1 e_1_2_8_80_1 Kuhnle GGC (e_1_2_8_38_1) e_1_2_8_4_1 Jones RJ (e_1_2_8_36_1) 1981; 12 e_1_2_8_6_1 e_1_2_8_8_1 e_1_2_8_21_1 e_1_2_8_42_1 e_1_2_8_67_1 e_1_2_8_23_1 e_1_2_8_44_1 e_1_2_8_65_1 e_1_2_8_86_1 e_1_2_8_63_1 e_1_2_8_84_1 e_1_2_8_61_1 e_1_2_8_82_1 e_1_2_8_18_1 Iyangbe CO (e_1_2_8_34_1) 2009; 4 e_1_2_8_39_1 e_1_2_8_14_1 e_1_2_8_35_1 e_1_2_8_16_1 e_1_2_8_37_1 e_1_2_8_58_1 e_1_2_8_79_1 Richards MP (e_1_2_8_62_1) 2006 Minagawa M (e_1_2_8_47_1) 1986; 20 e_1_2_8_10_1 e_1_2_8_56_1 e_1_2_8_77_1 e_1_2_8_12_1 e_1_2_8_33_1 e_1_2_8_54_1 e_1_2_8_52_1 e_1_2_8_73_1 e_1_2_8_71_1 |
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| Snippet | The “trophic level enrichment” between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the... The "trophic level enrichment" between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the... The 'trophic level enrichment' between diet and body results in an overall increase in nitrogen isotopic values as the food chain is ascended. Quantifying the... |
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| SubjectTerms | Adult Aged Anthropology, Physical Archaeology Biological and medical sciences Biomarkers - blood blood Body collagen Diet discrimination factor Erythrocytes - chemistry Feeding. Feeding behavior Female Fundamental and applied biological sciences. Psychology Humans Individuals keratin Male Middle Aged Nitrogen Isotopes - analysis Nitrogen Isotopes - metabolism nutritional biomarker Physical anthropology Prehistoric man Statistics, Nonparametric trophic level Vertebrates: anatomy and physiology, studies on body, several organs or systems |
| Title | The diet-body offset in human nitrogen isotopic values: A controlled dietary study |
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