umu.sePublications
Change search
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
Impact of contamination by mining rest products (Zn and Pb) on lake insect abundance, composition, and metamorphosis
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2018 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Heavy metals are of great concern when released into the environment, especially at high concentrations. Because of their persistence and toxicity, they have the ability to impact organisms both directly and indirectly via bioaccumulation in the food chain. In this report the effects on aquatic insect composition and abundance as well as possible effects on metamorphosis from larvae to adults were examined in six lakes – three with elevated Zn and Pb concentrations and three reference lakes - situated in Arjeplog municipality. Aquatic larvae and adult aquatic insects were sampled one year apart, and the number of individuals and community composition of both life stages were compared. Contrary to my hypothesis, the results showed no significant differences in abundance, taxa richness or number of individuals in pollution sensitive taxa (EPT) due to contamination. However, the result showed that the effect of contamination on the number of insects is different at different life stages (larval or adult), with fewer adults than expected emerging from contaminated lakes. This is likely explained by detrimental effects, caused by high metal concentrations, obstructing metamorphosis and decreasing emergence success. In this study, the negative effects on emergence could foremost be observed in chironomids (Chironomidae), which was the most abundant insect taxon in both reference and contaminated sites. This leads to the conclusion that including effects on metamorphosis can provide useful insights when assessing effects of a contaminant on the health of freshwater ecosystems.

Place, publisher, year, edition, pages
2018. , p. 17
Keywords [en]
metal contamination, aquatic, metamorphosis, insects, EPT
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:umu:diva-151892OAI: oai:DiVA.org:umu-151892DiVA, id: diva2:1248513
Educational program
Bachelor of Science in Biology and Earthscience
Available from: 2018-09-17 Created: 2018-09-16 Last updated: 2018-09-17Bibliographically approved

Open Access in DiVA

fulltext(658 kB)54 downloads
File information
File name FULLTEXT01.pdfFile size 658 kBChecksum SHA-512
3c046d06fd0960efd153c192479dbc70fe2c8db3c71d25c460adc62c33f8d0efbe05a145f660e3e9b7f08870e482c78d601a2f6708e101314d7ae8afeee0e98a
Type fulltextMimetype application/pdf

By organisation
Department of Ecology and Environmental Sciences
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 54 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: 234 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