CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Adjustments for confounders in individual and pooled samples from the Swedish national monitoring of contaminants in freshwater fish
Swedish Museum of Natural History, Department of Environmental research and monitoring. Naturvårdsverket.
Swedish Museum of Natural History, Department of Environmental research and monitoring.
Swedish Museum of Natural History, Department of Environmental research and monitoring.
Swedish Museum of Natural History, Department of Environmental research and monitoring.ORCID iD: 0000-0002-4001-0997
Show others and affiliations
2019 (English)Report (Other academic)Alternative title
Justering av tidseriedata (individuella och poolade prover) för miljögifter i limnisk biota (Swedish)
Abstract [en]

Within the Swedish National Monitoring Programme for Contaminants in Freshwater Biota, perch, pike and Arctic char are being analysed from 32 lakes distributed all over Sweden. One of the main objectives of the monitoring has been to detect temporal trends in different areas and for different contaminants. However, the measured concentrations in biota can be affected by biological factors such as age, length, trophic position (TP), fat or dry weight content. A change in one or several of these variables over time, or even among specimens taken within the same year, is likely to result in an increased variation of the measured concentrations and hence in a lower chance of detecting a trend. The purpose of this study was to evaluate if an adjustment of contaminant time trends by primarily stable isotopes, but also other confounding factors can:  A) reduce the individual and between-year variation and hence B) improve the likelihood of detecting temporal trends in time series for metals and organic contaminants. The study revealed an improvement in the likelihood of detecting a contaminant trend after adjustment of the data for almost all lakes and for all tested substances. For some lakes and substances, this improvement was substantial. Age seems to be an important confounding factor for metals and per- and polyfluoroalkyl substances. For lipophilic substances, fat content also appears to be an important factor in some lakes together with adjustments for carbon and nitrogen isotope ratios (d13C and d15N), which all reduced the variation in contaminant data. This suggests that there is a benefit of adjusting data on a regular basis in contaminant monitoring programmes in the future.

Place, publisher, year, edition, pages
2019. , p. 34
Keywords [sv]
Miljögifter, Tidstrender, Justering av data, Metaller, Hg, Cd, Pb, PFAS, PFOS, PFUnDA, PBDE, HBCDD, PCDD/Fs, dl-PCB
National Category
Natural Sciences Environmental Sciences
Research subject
Man and the environment
Identifiers
URN: urn:nbn:se:nrm:diva-3663OAI: oai:DiVA.org:nrm-3663DiVA, id: diva2:1380709
Funder
Swedish Environmental Protection Agency, 213-18-001Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2020-01-08Bibliographically approved

Open Access in DiVA

fulltext(3036 kB)76 downloads
File information
File name FULLTEXT01.pdfFile size 3036 kBChecksum SHA-512
d5851ab31fce71ab5ed058f3f5a1ca5a1b5066f490b5f598b83ed3ac3d403d400bc473887dd28e0e8e4e4609f86b6a33988ddbffe037c793c81621339ce12120
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Nyberg, ElisabethBignert, AndersDanielsson, SaraEk, CarolineFaxneld, Suzanne
By organisation
Department of Environmental research and monitoring
Natural SciencesEnvironmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 76 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 144 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf