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Tungmetallers påverkan på bottenfaunans artsammansättning i sjön Tisken
Dalarna University, School of Education and Humanities, Biology.
2002 (Swedish)Independent thesis Basic level (degree of Bachelor)Student thesis
Abstract [sv]

The purpose of this study was to investigate how elevated levels of heavy metals affect the faunal species composition, abundance and species-diversity. The bentic macroinvertebrate fauna in the highly polluted lake Tisken was compared with the bentic macroinvertebrate fauna in the unpolluted lake Varpan. Mine wastes account for most of the metal that is discharged into Tisken. The hypotheses was that the heavy metal pollutions in lake Tisken influenced the species composition, abundance and diversity of the macroinvertebrates. Twenty samples were taken in both sites. The invertebrates were collected with a bag net and a plastic cylinder one meter from the shoreline. The invertebrates in the forty samples were classified and statistical analyses were made. Some taxa, common at undisturbed sites, were missing at metal polluted sites. Mayfly larvae, Ephemeroptera, were only found in Varpan. Surprisingly, more taxa were found in the polluted lake Tisken (23 taxa) compared to the unpolluted Varpan (19 taxa). However, the abundance of macroinvertebrates in Varpan (291 individuals) was higher than in Tisken (242 individuals).

Place, publisher, year, edition, pages
2002.
Keyword [sv]
Varpan, Tisken, metallföroreningar, Gammarus sp., Asellus aquaticus
Identifiers
URN: urn:nbn:se:du-1544OAI: oai:dalea.du.se:1544DiVA: diva2:517931
Uppsok
Life Earth Science
Supervisors
Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2012-04-24Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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