FIG. 1.

DGGE analyses of PCR-amplified 16S rRNA gene fragments of bacterial communities in the water columns and sediments of Lake Kaiike (modified from reference 19 with permission of the publisher). Sequences of the labeled bands were affiliated with the family Chlorobiaceae. The bands were designated as described in a previous report (19). Numbers above each lane indicate depths (meters in the water columns [left]; centimeters in the sediment [right]) where the samples were obtained. Amplified 16S rRNA gene fragments derived from Desulfobulbus propionicus (Dbp), Desulfococcus multivorans (Dcm), and Desulfovibrio vulgaris (Dvv) were used as markers. (A) March 2003; (B) June 2003. M, molecular size markers.