Antarctic Science

Papers—Life Sciences and Oceanography

Temporal and spatial variations of phytoplankton from Boeckella Lake (Hope Bay, Antarctic Peninsula)

I. Izaguirre a1c1, G. Mataloni a1, A. Vinocur a1 and G. Tell a1
a1 Depto. Cs. Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab.II, 1428 Buenos Aires, Argentina

Article author query
izaguirre i   [PubMed][Google Scholar] 
mataloni g   [PubMed][Google Scholar] 
vinocur a   [PubMed][Google Scholar] 
tell g   [PubMed][Google Scholar] 


The main water body at Hope Bay, Boeckella Lake, was sampled at four sites for phytoplankton during summer 1991 to assess the influence of nutrients from nearby penguin rookeries on both phytoplankton density and composition. The site located at the base of the rookeries had total phosphorus values comparable to those reported from the most eutrophic Antarctic lakes. During the ice-free period most of the Chlorophyceae and Cyanophyceae recorded were concentrated at this site. Phytoplankton density increased strongly in the area opposite to the rookeries where ice began to form; an under-ice bloom of Ochromonas aff. ovalis (Chrysophyceae) was observed in this area.

(Received June 19 1992)
(Accepted September 25 1992)

Key Words: Antarctica; lakes; phytoplankton; ecology; nutrients; floristics.

c1 To whom reprint requests should be sent