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Dynamics of chlorophyll and photosynthesis in natural phytoplankton associations - 1. Seasonal and annual cycles of chlorophyll and phaeopigments, in relation to euphotic depth and their vertical distribution in small Northgerman lakes

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Meffert,  Maria-Elisabeth
Department Microbial Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Overbeck,  Hans-Jürgen
Department Microbial Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Meffert, M.-E., & Overbeck, H.-J. (1985). Dynamics of chlorophyll and photosynthesis in natural phytoplankton associations - 1. Seasonal and annual cycles of chlorophyll and phaeopigments, in relation to euphotic depth and their vertical distribution in small Northgerman lakes. Archiv für Hydrobiologie, 104(2), 219-234.


Cite as: https://hdl.handle.net/21.11116/0000-0005-0B8F-F
Abstract
In 1981 weekly investigations were made into the relationship between chlorophyll
levels and the depth of the euphotic zone and extinction coefficients in the Plußsee.
Chlorophyll and phaeopigment production was studied in relation to the algal growth
phases, depth, global radiation and temperature. Chlorophyll specific and the non-algal
light attenuation were estimated and compared with data from other lakes. In the
euphotic zone the mean annual level of chlorophyll-a was about 20mg m-3 or
80mg m-2, over the ranges 1-60mg m-3 or 8*220mg m-2 (1981). Maxima of about
100mg m-3 were observed corresponding to earlier findings. Phaeopigment levels increased from about 15% of chlorophyll-a to about 200 % in metalimnetic layers and
during algal decline. The chlorophyll maxima varied over the years of investigation,
being highest in 1981. Several algal assemblages with short periods of dominance formed
numerous chlorophyll peaks, which together produced 3 major blooms. Chlorophyll
maxima could occur at any depth between the surface and 10m. Distinct epilimnetic
and metalimnetic chlorophyll maxima were seen in spring and late summer, respectively.