| Summary: | Vertical distribution of phytoplanktonic chlorphyll-a in Boeckella Lake was studied during summer periods in 1992 and 1993. Two opposite sites subjected to different organic matter inputs from the adjacent penguin rockeries were periodically sampled at three depths. Chlorophyll-a concentrations varied from less than 0.10 μg l-1 during the ice thaw period, to 14.08 μg l-1 during late summer 1993. Recorded phosphate values compare to data reported for other enriched Antarctic lakes (14.77-970.46 μg PO4-P l-1). Significant differences between both sampling sites were observed in relation to conductivity, pH, phosphate concentrations and chlorophyll-a, stressing the influence of the penguin rockeries on the limnological features of the lake.
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