Interactive effects of nutrient availability and light levels on the periphyton composition of a large oligotrophic lake

Jane C Marks, R. L. Lowe

Research output: Chapter in Book/Report/Conference proceedingChapter

40 Scopus citations

Abstract

Periphyton biovolume and cell densities increased significantly with both nitrogen and phosphorus enrichment but were not affected by shading. Phosphorus enrichment increased periphyton accumulation only when N levels were high, indicating a significant interactive effect between N and P. Differences in species composition among treatments were mostly due to changes in the diatoms Nitzschia palea and Rhopalodia gibba. Ambient and phosphorus-enriched substrates were dominated by R. gibba, which contains a nitrogen-fixed endosymbiont, and blue-green aglae. Nitrogen enrichment and N and P in combination resulted in an assemblage dominated by N. palea. Unshaded and highly shaded substrates were dominated by N. palea and Achnanthes minutissima, but the medium-shade substrates were dominated by R. gibba. -from Authors

Original languageEnglish (US)
Title of host publicationCanadian Journal of Fisheries and Aquatic Sciences
Pages1270-1278
Number of pages9
Volume50
Edition6
StatePublished - 1993
Externally publishedYes

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ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Marks, J. C., & Lowe, R. L. (1993). Interactive effects of nutrient availability and light levels on the periphyton composition of a large oligotrophic lake. In Canadian Journal of Fisheries and Aquatic Sciences (6 ed., Vol. 50, pp. 1270-1278)