Data/hora: 08/06/2024 04:24:39

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 26/08/1997
Data da última atualização: | 05/04/2017
Autoria: | PETERSON, B. J.; FRY, B.
Título: | Stable isotopes in ecosystem studies.
Ano de publicação: | 1987
Fonte/Imprenta: | Annual Review of Ecology and Sistematics, v.18, p.293-320, 1987.
Idioma: | Inglês
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.
Palavras-Chave: | Ciclo bioquimico; Ecosystem; Elemental cycle; Isotopo estavel; Metodologia.
Thesagro: | Ecossistema.
Thesaurus Nal: | methodology; stable isotopes.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34740-1) - ADC - SP - PP - SP15351 -  - 15351 - DIS