|
Registro Completo |
|
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: |
-- |
|
Marc: |
LEADER 01560naa a2200229 a 4500
001 1792359
005 2017-03-27
008 1984 bl --- 0-- u #d
100 1 $aFRY, B.
245 $a13C measurements as indicators of carbon flow in marine and freshwater ecosystems.
260 $c1984
520 $aStable 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.
650 $aaquatic plants
650 $aecosystems
650 $afood webs
650 $aorganic matter
650 $aCadeia Alimentar
650 $aEcossistema
650 $aMatéria Orgânica
650 $aPlanta Aquatica
700 1 $aSHERR, E. B.
773 $tContributions in Marine Science$gv.27, p.13-47, 1984.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
