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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
26/08/1997 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
DeNIRO, M. J.; EPSTEIN, S. |
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Título: |
Influence of diet on the distribution of nitrogen isotopes in animals. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Geochimica et Cosmochimica, v.45, p.341-351, 1981. |
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Idioma: |
Inglês |
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Conteúdo: |
The influence of diet on the distribution of nitrogen isotopes in animals was investigated by analyzing animals grown in the laboratory on diets of constant nitrogen isotopic composition. The isotopic composition of the nitrogen in an animal relects the nitrogen isotopic compostiion of its diet. The N values of the whole bodies of animals are usually more positive than those of their diets. Different individuals os a species raised on the same diet can have significantly different N values. The variability of the relationship between the N values of animals and their diets is greater for different species raised on the same diet than for the same species raised on different diets. Different tissues of mice are also enriched in N relative to the diet, with the difference between the N values of a tissue and the diet depending on both the kind of tissue and the diet involved. The N values of collagen and chitin, biochemical components that are often preserved in fossil animal remaism are also related to the N value of the diet. The dependence of the N values of whole animals and their tissues and biochemical components on the N value of diet indicates that the isotopic composition of animal nitrogen can be used to obtain information about an animal's diet if its potential food sources had different N values. The nitrogen isotopic method of dietary analysis probably can be used to estimate the relative use of legumes vs non-legumes or of aquatic vc terrestrial organisms as food sources for extant and fossil animals. However the method probably will not be applicable in those modern ecosystems in which the use of chemical fettilizers has influenced the distribution of nitrogen isotopes in food sources. The isotopic method of dietary analysis was used to reconstruct changes in the diet of the human population that occupied the Tehuacan Valley of Mexico over a 7000 yr span. Variations in the C and N values of bone collagen suggest that C4 and/or CAM plants (presumably mostly corn) and legumes (presumably mostly beans) were introduced into the diet much earlier than suggested by conventional archaeological analysis. MenosThe influence of diet on the distribution of nitrogen isotopes in animals was investigated by analyzing animals grown in the laboratory on diets of constant nitrogen isotopic composition. The isotopic composition of the nitrogen in an animal relects the nitrogen isotopic compostiion of its diet. The N values of the whole bodies of animals are usually more positive than those of their diets. Different individuals os a species raised on the same diet can have significantly different N values. The variability of the relationship between the N values of animals and their diets is greater for different species raised on the same diet than for the same species raised on different diets. Different tissues of mice are also enriched in N relative to the diet, with the difference between the N values of a tissue and the diet depending on both the kind of tissue and the diet involved. The N values of collagen and chitin, biochemical components that are often preserved in fossil animal remaism are also related to the N value of the diet. The dependence of the N values of whole animals and their tissues and biochemical components on the N value of diet indicates that the isotopic composition of animal nitrogen can be used to obtain information about an animal's diet if its potential food sources had different N values. The nitrogen isotopic method of dietary analysis probably can be used to estimate the relative use of legumes vs non-legumes or of aquatic vc terrestrial organisms as foo... Mostrar Tudo |
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Palavras-Chave: |
Distribuicao; Distribution; Isotopo estavel. |
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Thesagro: |
Animal; Dieta; Nitrogênio. |
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Thesaurus Nal: |
diet; nitrogen; stable isotopes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02760naa a2200241 a 4500
001 1791524
005 2017-04-05
008 1981 bl --- 0-- u #d
100 1 $aDeNIRO, M. J.
245 $aInfluence of diet on the distribution of nitrogen isotopes in animals.
260 $c1981
520 $aThe influence of diet on the distribution of nitrogen isotopes in animals was investigated by analyzing animals grown in the laboratory on diets of constant nitrogen isotopic composition. The isotopic composition of the nitrogen in an animal relects the nitrogen isotopic compostiion of its diet. The N values of the whole bodies of animals are usually more positive than those of their diets. Different individuals os a species raised on the same diet can have significantly different N values. The variability of the relationship between the N values of animals and their diets is greater for different species raised on the same diet than for the same species raised on different diets. Different tissues of mice are also enriched in N relative to the diet, with the difference between the N values of a tissue and the diet depending on both the kind of tissue and the diet involved. The N values of collagen and chitin, biochemical components that are often preserved in fossil animal remaism are also related to the N value of the diet. The dependence of the N values of whole animals and their tissues and biochemical components on the N value of diet indicates that the isotopic composition of animal nitrogen can be used to obtain information about an animal's diet if its potential food sources had different N values. The nitrogen isotopic method of dietary analysis probably can be used to estimate the relative use of legumes vs non-legumes or of aquatic vc terrestrial organisms as food sources for extant and fossil animals. However the method probably will not be applicable in those modern ecosystems in which the use of chemical fettilizers has influenced the distribution of nitrogen isotopes in food sources. The isotopic method of dietary analysis was used to reconstruct changes in the diet of the human population that occupied the Tehuacan Valley of Mexico over a 7000 yr span. Variations in the C and N values of bone collagen suggest that C4 and/or CAM plants (presumably mostly corn) and legumes (presumably mostly beans) were introduced into the diet much earlier than suggested by conventional archaeological analysis.
650 $adiet
650 $anitrogen
650 $astable isotopes
650 $aAnimal
650 $aDieta
650 $aNitrogênio
653 $aDistribuicao
653 $aDistribution
653 $aIsotopo estavel
700 1 $aEPSTEIN, S.
773 $tGeochimica et Cosmochimica$gv.45, p.341-351, 1981.
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Registro original: |
Embrapa Pantanal (CPAP) |
