Contribution
Siliceous microfossil succession in recent Lake Huron sediments
Wolin, Julie A.; Stoermer, Eugene F.; Schelske, Claire L.; Conley, Daniel J.
Archiv für Hydrobiologie Volume 114 Number 2 (1988), p. 175 - 198
50 références bibliographiques
publié: Dec 14, 1988
DOI: 10.1127/archiv-hydrobiol/114/1988/175
ArtNo. ESP141011402001, Prix: 29.00 €
Abstract
Siliceous algal remains in recent sediments from Lake Huron were analyzed to determine qualitative and quantitative changes in microfossil assemblages during the past 200 years. Total microfossil abundance increases from ca. 200 x 106gm-1 at 30—15 cm to ca. 700 x 106gm-1 above 10 cm. A shift from a dominance of benthic taxa to a higher percentage of planktonic species occurs toward the surface of the core. Diatom taxa tolerant of nutrient enrichment and species common in eutrophic Saginaw Bay waters begin to occur and increase in abundance above 10 cm. Three major microfossil associations were identified through cluster analysis. Trends in Lake Huron phytoplankton composition were compared with previous microfossil work from Lakes Superior and Ontario.
Mots-clefs
assemblages • abundance • dominance • benthic taxa • planktonic species • Lake Huron