Summary
Differences in water chemistry and in the composition, abundance and activity of benthic and planktonic plant communities were observed in freshwater lakes of different trophic status at Signy Island, South Orkney Islands, maritime Antarctica. Phytoplankton density increased with increasing nutrient concentration. Picoplankton ( < 2 μm) contributed most chlorophyll–a and numbers to the phytoplankton in all lakes, but the nanoplankton fraction (2–20 μm) was disproportionally active in photosynthesis. Some algae only occurred in the eutrophic lakes, notably a large Chlamydomonas sp., while smaller flagellated chlorophytes, chrysophytes and cryptophytes predominated in the nanoplankton of oligotrophic lakes. Partitioning of photosynthate in protein, polysaccharide, lipid and metabolite fractions showed little difference between the lakes.
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Hawes, I. (1990). Eutrophication and Vegetation Development in Maritime Antarctic Lakes. In: Kerry, K.R., Hempel, G. (eds) Antarctic Ecosystems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-84074-6_8
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DOI: https://doi.org/10.1007/978-3-642-84074-6_8
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