Abstract
Cladoceran populations, as revealed by sedimentary remains, were studied in six lakes which by diatom evidence have become strongly acidified during the past 30 years. The accumulation rates of cladoceran remains and in two of the most strongly acidified lakes both relative and absolute numbers ofBosmina greatly increased during this period. Species numbers were not reduced, but there were shifts in relative abundances of cladoceran species.Bosmina longispina dominated all the lakes. Low pH (4.7) seemed not to be straight-forwardly harmful toDaphnia longispina, but the relative abundances of this taxon were reduced because ofBosmina.
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Uimonen-Simola, P., Tolonen, K. Effects of recent acidification on Cladocera in small clear-water lakes studied by means of sedimentary remains. Hydrobiologia 145, 343–351 (1987). https://doi.org/10.1007/BF02530296
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DOI: https://doi.org/10.1007/BF02530296