• norsk
    • English
  • norsk 
    • norsk
    • English
  • Logg inn
Vis innførsel 
  •   Hjem
  • Norsk institutt for vannforskning
  • Publikasjoner fra Cristin - NIVA
  • Vis innførsel
  •   Hjem
  • Norsk institutt for vannforskning
  • Publikasjoner fra Cristin - NIVA
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Estimating trophic levels and trophic magnification factors using Bayesian inference

Starrfelt, Jostein; Borgå, Katrine; Ruus, Anders; Fjeld, Eirik
Journal article, Peer reviewed
Accepted version
Thumbnail
Åpne
Starrfelt et al. 2013 Manuscript 10.1021/es401231e (1.179Mb)
Permanent lenke
http://hdl.handle.net/11250/2570950
Utgivelsesdato
2013
Metadata
Vis full innførsel
Samlinger
  • Publikasjoner fra Cristin - NIVA [1757]
  • Scientific publications [943]
Originalversjon
Environmental Science and Technology. 2013, 47 (20), 11599-11606.   10.1021/es401231e
Sammendrag
Food web biomagnification is increasingly assessed by estimating trophic magnification factors (TMF) where solvent (often lipid) normalized contaminant concentration is regressed onto the trophic level, and TMFs are represented by the slope of the relationship. In TMF regressions, the uncertainty in the contaminant concentrations is appreciated, whereas the trophic levels are assumed independent and not associated with variability or uncertainty pertaining to e.g. quantification. In reality, the trophic levels may vary due to measurement error in stable isotopes of nitrogen (δ15N) of each sample, in δ15N in selected reference baseline trophic level, and in the enrichment factor of δ15N between two trophic levels (ΔN), which are all needed to calculate trophic levels. The present study used a Markov Chain Monte Carlo method, with knowledge about the food web structure, which resulted in a dramatic increase in the precision in the TMF estimates. This also lead to a better understanding of the uncertainties in bioaccumulation measures; instead of using point estimates of TMF, the uncertainty can be quantified (i.e., TMF >1, namely positive biomagnification, with an estimated X % probability).
Utgiver
American Chemical Society
Tidsskrift
Environmental Science and Technology

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit
 

 

Bla i

Hele arkivetDelarkiv og samlingerUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifterDenne samlingenUtgivelsesdatoForfattereTitlerEmneordDokumenttyperTidsskrifter

Min side

Logg inn

Statistikk

Besøksstatistikk

Kontakt oss | Gi tilbakemelding

Personvernerklæring
DSpace software copyright © 2002-2019  DuraSpace

Levert av  Unit