FIG. 2.

(A) Bacterial community composition profiles analyzed by DGGE. A denaturing gradient of 29 to 52% (top to bottom) was applied. Dates when isolates and clone libraries were obtained are indicated in bold. Excised and sequenced bands are numbered to the left of the lanes. Asterisks denote vertical positions for which duplicate bands were sequenced. The number of discernible bands used in the construction of the dendrogram (B) is indicated below each lane. Relationships of excised band sequences to sequences in GenBank are shown in Table 1. (B) Dendrogram obtained by the unweighted-pair group method using arithmetic average, based on presence/absence of DGGE bands. Selected environmental data are shown to the right of the dendrogram.