Data/hora: 08/06/2024 05:40:45

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 06/05/1998
Data da última atualização: | 27/03/2017
Autoria: | FRY, B.; SHERR, E. B.
Título: | 13C measurements as indicators of carbon flow in marine and freshwater ecosystems.
Ano de publicação: | 1984
Fonte/Imprenta: | Contributions in Marine Science, v.27, p.13-47, 1984.
Idioma: | Inglês
Conteúdo: | Stable carbon isotopic measurements provide useful information about which autotrophs-plants and bacteria-are important sources of carbon in marine and freshwater sediments, POC, and food webs. Transect studies of sediments and POC (section 4) often show clear-cut patterns of isotopic change that can be directly related to the proximity of various carbon sources. This has led to use of simple mixing models in which isotopic data indicate relative importances of plant carbon sources. How-ever, isotopic interpretations of 13C data are not always easily made. For instance, while - 27% isotopic values for POC in upper reaches of estuaries may indicate carbon from terrestrial C, plants, phytoplankton in these locations may also have - 27% values. Other potential complications discussed in section 4 include isotopic changes during plant decomposition (these appear to be small, <2%) and also multiple sources of organic matter.
Thesagro: | Cadeia Alimentar; Ecossistema; Matéria Orgânica; Planta Aquatica.
Thesaurus Nal: | aquatic plants; ecosystems; food webs; organic matter.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (35512-1) - ADC - SP - PP - SP15543 -  - 15543 - DIS