SIZE-FRACTIONATED PRIMARY PRODUCTIVITY 



367 



Fig. 1 Location of study area and sampling stations. 



Water samples were obtained with an opaque, 2-liter, PVC 

 Van Doni sampler at a depth of 3 m at all sites except KD, where the 

 depth of the samples varied because the current was too fast. Five 

 separate casts were made at each site, and the water was stored in 

 opaque, 2-liter plastic jars. Three samples were used for the carbon 

 uptake experiments and two for chlorophyll extraction. At each site 

 a 1-liter polyethylene bottle was also filled with lake water for 

 inorganic carbon determination. 



