Summer Changes in the Vertical Distribution of Chlorophyll-a in Boeckella Lake (Hope Bay, Antarctic Peninsula)

IZAGUIRRE, I.; VINOCUR A.; MATALONI, G.

NANKYOKU SHIRYO

National Institute of Polar Research

Lugar: Tokyo; Año: 1996 vol. 40 p. 43 - 52

0085-7289

Abstract: Vertical distribution of phytoplanktonic chlorophyll-a in BoeckellaLake was studied during summer periods in 1992 and 1993. Two opposite sites subjectedto different organic matter inputs from the adjacent penguin rookeries wereperiodically sampled at three depths. Chlorophyll-a concentrations varied from lessthan 0.10 pg r´ during the ice thawing period, to 14.08 pg t:´ during late summer1993. Recorded phosphate values compare to data reported for other enriched Antarcticlakes (14.77-970.46 Jlg P04-P rl). Significant differences between both samplingsites were observed in relation to conductivity, pH, phosphate concentrations andchlorophyll-a, stressing the influence of the penguin rookeries on the Iimnological featuresof the lake. These differences were stronger during the ice cover period.