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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: |
PETERSON, B. J.; FRY, B. |
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Título: |
Stable isotopes in ecosystem studies. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Annual Review of Ecology and Sistematics, v.18, p.293-320, 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
The use of stable isotopes to solve biogeochemical problems in ecosystem analysis is increasing rapidly because stable isotope data can contribute both source-sink (tracer) and process information. The elemts C, N, S, H, and O all have more than one isotope, and isotopic compositions of natural materials can be measured with great precision with a mass spectrometer. Isotopic composition change in predictable ways as elements cycle through the biosphere. These changes have been exploited by geochemists to understand the global elemental cycles. Ecologists have not until quite recently employed these techniques. The reasons for this are, first, that most ecologists do not have the background in chemistry and geochemistry to be fully aware of the possibilities for exploiting the natural variation in stable isotopic compositions, and second,that stable isotope ratio measurements require equipament nor normally available to ecologists. This is unfortunate because some of the more intactable problems in ecology can be profitably addressed using stable isotope measurements. Stable isotopes are ideally suited to increase our understanding of element cycles in ecosystems. |
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Palavras-Chave: |
Ciclo bioquimico; Ecosystem; Elemental cycle; Isotopo estavel; Metodologia. |
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Thesagro: |
Ecossistema. |
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Thesaurus Nal: |
methodology; stable isotopes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01771naa a2200229 a 4500
001 1791523
005 2017-04-05
008 1987 bl --- 0-- u #d
100 1 $aPETERSON, B. J.
245 $aStable isotopes in ecosystem studies.
260 $c1987
520 $aThe use of stable isotopes to solve biogeochemical problems in ecosystem analysis is increasing rapidly because stable isotope data can contribute both source-sink (tracer) and process information. The elemts C, N, S, H, and O all have more than one isotope, and isotopic compositions of natural materials can be measured with great precision with a mass spectrometer. Isotopic composition change in predictable ways as elements cycle through the biosphere. These changes have been exploited by geochemists to understand the global elemental cycles. Ecologists have not until quite recently employed these techniques. The reasons for this are, first, that most ecologists do not have the background in chemistry and geochemistry to be fully aware of the possibilities for exploiting the natural variation in stable isotopic compositions, and second,that stable isotope ratio measurements require equipament nor normally available to ecologists. This is unfortunate because some of the more intactable problems in ecology can be profitably addressed using stable isotope measurements. Stable isotopes are ideally suited to increase our understanding of element cycles in ecosystems.
650 $amethodology
650 $astable isotopes
650 $aEcossistema
653 $aCiclo bioquimico
653 $aEcosystem
653 $aElemental cycle
653 $aIsotopo estavel
653 $aMetodologia
700 1 $aFRY, B.
773 $tAnnual Review of Ecology and Sistematics$gv.18, p.293-320, 1987.
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Registro original: |
Embrapa Pantanal (CPAP) |
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